./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi000_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/rfi000_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/rfi000_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/rfi000_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 16:33:17,846 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:33:17,904 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:33:17,908 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:33:17,908 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:33:17,933 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:33:17,934 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:33:17,934 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:33:17,934 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:33:17,939 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:33:17,939 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:33:17,939 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:33:17,940 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:33:17,941 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:33:17,941 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:33:17,941 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:33:17,942 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:33:17,942 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:33:17,942 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:33:17,942 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:33:17,942 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:33:17,943 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:33:17,943 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:33:17,943 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:33:17,943 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:33:17,943 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:33:17,943 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:33:17,944 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:33:17,944 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:33:17,944 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:33:17,945 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:33:17,945 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:33:17,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:33:17,945 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:33:17,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:33:17,946 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:33:17,946 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:33:17,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:33:17,946 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:33:17,946 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:33:17,946 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:33:17,946 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:33:17,946 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:33:17,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:33:18,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:33:18,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:33:18,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:33:18,163 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:33:18,164 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:33:18,165 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/rfi000_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-20 16:33:18,251 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:33:18,252 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:33:18,252 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi000_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 16:33:19,251 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:33:19,461 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:33:19,461 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi000_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 16:33:19,482 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53f93ac28/7447f2485f69409184c46b954fec5113/FLAG18f3e5c81 [2024-06-20 16:33:19,492 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53f93ac28/7447f2485f69409184c46b954fec5113 [2024-06-20 16:33:19,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:33:19,495 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:33:19,496 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:33:19,496 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:33:19,513 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:33:19,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:33:18" (1/2) ... [2024-06-20 16:33:19,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f814d7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:19, skipping insertion in model container [2024-06-20 16:33:19,515 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:33:18" (1/2) ... [2024-06-20 16:33:19,516 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@19f26b96 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:19, skipping insertion in model container [2024-06-20 16:33:19,516 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:33:19" (2/2) ... [2024-06-20 16:33:19,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f814d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:19, skipping insertion in model container [2024-06-20 16:33:19,517 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:33:19" (2/2) ... [2024-06-20 16:33:19,517 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:33:19,564 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:33:19,565 INFO L97 edCorrectnessWitness]: Location invariant before [L829-L829] ((((((((((((((! multithreaded || y$r_buff1_thd2 == (_Bool)0) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! 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 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 2) && __unbuffered_p1_EBX <= 127) && ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2)))) && (! multithreaded || y$read_delayed_var == 0) [2024-06-20 16:33:19,565 INFO L97 edCorrectnessWitness]: Location invariant before [L830-L830] ((((((((((((((! multithreaded || y$r_buff1_thd2 == (_Bool)0) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || (((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 2) && __unbuffered_p1_EBX <= 127) && ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2)))) && (! multithreaded || y$read_delayed_var == 0) [2024-06-20 16:33:19,566 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:33:19,566 INFO L106 edCorrectnessWitness]: ghost_update [L827-L827] multithreaded = 1; [2024-06-20 16:33:19,589 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:33:19,930 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:33:19,937 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:33:20,053 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:33:20,089 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:33:20,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:20 WrapperNode [2024-06-20 16:33:20,090 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:33:20,091 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:33:20,091 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:33:20,091 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:33:20,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:20" (1/1) ... [2024-06-20 16:33:20,124 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:20" (1/1) ... [2024-06-20 16:33:20,153 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 132 [2024-06-20 16:33:20,154 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:33:20,154 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:33:20,154 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:33:20,154 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:33:20,163 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:20" (1/1) ... [2024-06-20 16:33:20,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:20" (1/1) ... [2024-06-20 16:33:20,167 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:20" (1/1) ... [2024-06-20 16:33:20,220 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 16:33:20,220 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:20" (1/1) ... [2024-06-20 16:33:20,220 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:20" (1/1) ... [2024-06-20 16:33:20,258 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:20" (1/1) ... [2024-06-20 16:33:20,259 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:20" (1/1) ... [2024-06-20 16:33:20,261 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:20" (1/1) ... [2024-06-20 16:33:20,263 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:20" (1/1) ... [2024-06-20 16:33:20,287 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:33:20,296 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:33:20,297 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:33:20,297 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:33:20,297 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:20" (1/1) ... [2024-06-20 16:33:20,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:33:20,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:33:20,356 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 16:33:20,372 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 16:33:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:33:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:33:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:33:20,406 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:33:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:33:20,407 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:33:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:33:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:33:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:33:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:33:20,409 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 16:33:20,554 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:33:20,558 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:33:20,910 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:33:20,911 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:33:21,013 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:33:21,013 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:33:21,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:33:21 BoogieIcfgContainer [2024-06-20 16:33:21,013 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:33:21,015 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:33:21,015 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:33:21,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:33:21,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:33:18" (1/4) ... [2024-06-20 16:33:21,017 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3001cf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:33:21, skipping insertion in model container [2024-06-20 16:33:21,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:33:19" (2/4) ... [2024-06-20 16:33:21,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3001cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:33:21, skipping insertion in model container [2024-06-20 16:33:21,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:20" (3/4) ... [2024-06-20 16:33:21,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3001cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:33:21, skipping insertion in model container [2024-06-20 16:33:21,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:33:21" (4/4) ... [2024-06-20 16:33:21,019 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi000_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 16:33:21,030 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:33:21,031 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-20 16:33:21,031 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:33:21,060 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:33:21,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-20 16:33:21,125 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-20 16:33:21,125 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:33:21,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:33:21,127 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-20 16:33:21,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-20 16:33:21,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:33:21,139 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;@25cb820a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:33:21,139 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-20 16:33:21,142 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:33:21,142 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 16:33:21,142 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:33:21,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:21,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:33:21,143 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 16:33:21,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:21,147 INFO L85 PathProgramCache]: Analyzing trace with hash 401809168, now seen corresponding path program 1 times [2024-06-20 16:33:21,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:21,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093996925] [2024-06-20 16:33:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:21,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:22,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:22,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093996925] [2024-06-20 16:33:22,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093996925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:22,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:22,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:33:22,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101294616] [2024-06-20 16:33:22,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:22,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:33:22,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:22,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:33:22,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:33:22,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-20 16:33:22,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:22,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:22,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-20 16:33:22,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:22,190 INFO L124 PetriNetUnfolderBase]: 216/386 cut-off events. [2024-06-20 16:33:22,190 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-20 16:33:22,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 386 events. 216/386 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1364 event pairs, 133 based on Foata normal form. 1/380 useless extension candidates. Maximal degree in co-relation 776. Up to 378 conditions per place. [2024-06-20 16:33:22,195 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-20 16:33:22,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 119 flow [2024-06-20 16:33:22,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:33:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:33:22,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-06-20 16:33:22,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2024-06-20 16:33:22,205 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 49 transitions. [2024-06-20 16:33:22,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 119 flow [2024-06-20 16:33:22,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-20 16:33:22,209 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-20 16:33:22,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-20 16:33:22,213 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-20 16:33:22,214 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-20 16:33:22,214 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 16:33:22,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:22,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:22,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:33:22,215 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 16:33:22,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:22,216 INFO L85 PathProgramCache]: Analyzing trace with hash -408414353, now seen corresponding path program 1 times [2024-06-20 16:33:22,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:22,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242921878] [2024-06-20 16:33:22,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:22,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:22,721 INFO 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 16:33:22,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:22,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242921878] [2024-06-20 16:33:22,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242921878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:22,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:22,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:33:22,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623542646] [2024-06-20 16:33:22,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:22,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:33:22,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:22,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:33:22,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:33:22,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-20 16:33:22,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:22,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:22,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-20 16:33:22,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:22,872 INFO L124 PetriNetUnfolderBase]: 213/381 cut-off events. [2024-06-20 16:33:22,872 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-06-20 16:33:22,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 381 events. 213/381 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1357 event pairs, 109 based on Foata normal form. 2/381 useless extension candidates. Maximal degree in co-relation 865. Up to 364 conditions per place. [2024-06-20 16:33:22,877 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-20 16:33:22,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 161 flow [2024-06-20 16:33:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:33:22,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:33:22,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-06-20 16:33:22,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:33:22,881 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 62 transitions. [2024-06-20 16:33:22,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 161 flow [2024-06-20 16:33:22,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:33:22,905 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-20 16:33:22,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-20 16:33:22,906 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-20 16:33:22,906 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-20 16:33:22,906 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 16:33:22,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:22,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:22,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:33:22,907 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 16:33:22,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:22,917 INFO L85 PathProgramCache]: Analyzing trace with hash 224058001, now seen corresponding path program 1 times [2024-06-20 16:33:22,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:22,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607666719] [2024-06-20 16:33:22,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:22,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:23,465 INFO 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 16:33:23,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:23,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607666719] [2024-06-20 16:33:23,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607666719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:23,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:23,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:33:23,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421506240] [2024-06-20 16:33:23,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:23,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:33:23,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:23,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:33:23,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:33:23,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-20 16:33:23,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:23,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:23,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-20 16:33:23,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:23,603 INFO L124 PetriNetUnfolderBase]: 214/383 cut-off events. [2024-06-20 16:33:23,604 INFO L125 PetriNetUnfolderBase]: For 221/221 co-relation queries the response was YES. [2024-06-20 16:33:23,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 383 events. 214/383 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1367 event pairs, 78 based on Foata normal form. 3/384 useless extension candidates. Maximal degree in co-relation 960. Up to 338 conditions per place. [2024-06-20 16:33:23,606 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 35 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-06-20 16:33:23,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 49 transitions, 253 flow [2024-06-20 16:33:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:33:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:33:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-20 16:33:23,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225806451612903 [2024-06-20 16:33:23,608 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 81 transitions. [2024-06-20 16:33:23,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 49 transitions, 253 flow [2024-06-20 16:33:23,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 49 transitions, 244 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 16:33:23,610 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 162 flow [2024-06-20 16:33:23,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-06-20 16:33:23,610 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2024-06-20 16:33:23,610 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 162 flow [2024-06-20 16:33:23,611 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 16:33:23,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:23,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:23,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:33:23,611 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 16:33:23,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:23,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1283962284, now seen corresponding path program 1 times [2024-06-20 16:33:23,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:23,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881459634] [2024-06-20 16:33:23,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:23,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:24,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:24,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881459634] [2024-06-20 16:33:24,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881459634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:24,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:24,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:33:24,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844414668] [2024-06-20 16:33:24,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:24,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:33:24,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:24,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:33:24,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:33:24,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-20 16:33:24,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 162 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 16:33:24,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:24,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-20 16:33:24,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:24,509 INFO L124 PetriNetUnfolderBase]: 224/400 cut-off events. [2024-06-20 16:33:24,510 INFO L125 PetriNetUnfolderBase]: For 487/487 co-relation queries the response was YES. [2024-06-20 16:33:24,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1202 conditions, 400 events. 224/400 cut-off events. For 487/487 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1437 event pairs, 48 based on Foata normal form. 4/402 useless extension candidates. Maximal degree in co-relation 1185. Up to 312 conditions per place. [2024-06-20 16:33:24,512 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 43 selfloop transitions, 19 changer transitions 0/65 dead transitions. [2024-06-20 16:33:24,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 392 flow [2024-06-20 16:33:24,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:24,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:24,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-20 16:33:24,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5376344086021505 [2024-06-20 16:33:24,514 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 162 flow. Second operand 6 states and 100 transitions. [2024-06-20 16:33:24,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 392 flow [2024-06-20 16:33:24,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 65 transitions, 388 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 16:33:24,517 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 277 flow [2024-06-20 16:33:24,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2024-06-20 16:33:24,518 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-20 16:33:24,518 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 277 flow [2024-06-20 16:33:24,518 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 16:33:24,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:24,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:24,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:33:24,518 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 16:33:24,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:24,519 INFO L85 PathProgramCache]: Analyzing trace with hash 571408976, now seen corresponding path program 1 times [2024-06-20 16:33:24,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:24,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749131006] [2024-06-20 16:33:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:24,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:25,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:25,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749131006] [2024-06-20 16:33:25,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749131006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:25,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:25,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:25,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41879275] [2024-06-20 16:33:25,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:25,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:25,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:25,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:25,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-20 16:33:25,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 277 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 16:33:25,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:25,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-20 16:33:25,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:25,432 INFO L124 PetriNetUnfolderBase]: 230/414 cut-off events. [2024-06-20 16:33:25,433 INFO L125 PetriNetUnfolderBase]: For 910/910 co-relation queries the response was YES. [2024-06-20 16:33:25,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 414 events. 230/414 cut-off events. For 910/910 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1520 event pairs, 23 based on Foata normal form. 8/420 useless extension candidates. Maximal degree in co-relation 1468. Up to 292 conditions per place. [2024-06-20 16:33:25,435 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 43 selfloop transitions, 22 changer transitions 0/68 dead transitions. [2024-06-20 16:33:25,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 68 transitions, 481 flow [2024-06-20 16:33:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 16:33:25,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069124423963134 [2024-06-20 16:33:25,438 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 277 flow. Second operand 7 states and 110 transitions. [2024-06-20 16:33:25,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 68 transitions, 481 flow [2024-06-20 16:33:25,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 68 transitions, 469 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-20 16:33:25,443 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 319 flow [2024-06-20 16:33:25,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=319, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-20 16:33:25,447 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2024-06-20 16:33:25,448 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 319 flow [2024-06-20 16:33:25,448 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 16:33:25,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:25,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:25,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:33:25,452 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 16:33:25,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:25,452 INFO L85 PathProgramCache]: Analyzing trace with hash 42354102, now seen corresponding path program 1 times [2024-06-20 16:33:25,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:25,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2791486] [2024-06-20 16:33:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:25,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:25,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:25,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2791486] [2024-06-20 16:33:25,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2791486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:25,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:25,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:33:25,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986461110] [2024-06-20 16:33:25,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:25,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:33:25,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:25,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:33:25,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:33:25,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:25,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 319 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 16:33:25,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:25,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:25,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:26,176 INFO L124 PetriNetUnfolderBase]: 228/411 cut-off events. [2024-06-20 16:33:26,176 INFO L125 PetriNetUnfolderBase]: For 1061/1061 co-relation queries the response was YES. [2024-06-20 16:33:26,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1601 conditions, 411 events. 228/411 cut-off events. For 1061/1061 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1519 event pairs, 57 based on Foata normal form. 1/410 useless extension candidates. Maximal degree in co-relation 1575. Up to 400 conditions per place. [2024-06-20 16:33:26,179 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 44 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2024-06-20 16:33:26,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 431 flow [2024-06-20 16:33:26,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:33:26,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:33:26,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2024-06-20 16:33:26,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:33:26,180 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 319 flow. Second operand 5 states and 55 transitions. [2024-06-20 16:33:26,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 431 flow [2024-06-20 16:33:26,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 377 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:26,183 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 282 flow [2024-06-20 16:33:26,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-20 16:33:26,184 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2024-06-20 16:33:26,184 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 282 flow [2024-06-20 16:33:26,184 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 16:33:26,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:26,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:26,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:33:26,184 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 16:33:26,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:26,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1300956534, now seen corresponding path program 1 times [2024-06-20 16:33:26,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:26,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660028093] [2024-06-20 16:33:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:26,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:26,691 INFO 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 16:33:26,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:26,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660028093] [2024-06-20 16:33:26,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660028093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:26,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:26,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:26,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700946141] [2024-06-20 16:33:26,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:26,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:26,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:26,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:26,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:26,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:26,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 282 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 16:33:26,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:26,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:26,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:26,946 INFO L124 PetriNetUnfolderBase]: 226/408 cut-off events. [2024-06-20 16:33:26,947 INFO L125 PetriNetUnfolderBase]: For 1159/1159 co-relation queries the response was YES. [2024-06-20 16:33:26,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1532 conditions, 408 events. 226/408 cut-off events. For 1159/1159 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1496 event pairs, 56 based on Foata normal form. 1/407 useless extension candidates. Maximal degree in co-relation 1504. Up to 394 conditions per place. [2024-06-20 16:33:26,949 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 43 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-06-20 16:33:26,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 398 flow [2024-06-20 16:33:26,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:26,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2024-06-20 16:33:26,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-20 16:33:26,950 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 282 flow. Second operand 6 states and 63 transitions. [2024-06-20 16:33:26,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 398 flow [2024-06-20 16:33:26,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 53 transitions, 383 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:26,953 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 288 flow [2024-06-20 16:33:26,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-20 16:33:26,954 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-06-20 16:33:26,954 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 288 flow [2024-06-20 16:33:26,954 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 16:33:26,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:26,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:26,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:33:26,955 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 16:33:26,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:26,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1674733077, now seen corresponding path program 1 times [2024-06-20 16:33:26,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:26,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298454370] [2024-06-20 16:33:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:26,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:27,513 INFO 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 16:33:27,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:27,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298454370] [2024-06-20 16:33:27,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298454370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:27,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:27,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:27,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863866482] [2024-06-20 16:33:27,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:27,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:27,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:27,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:27,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:27,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:27,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 288 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 16:33:27,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:27,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:27,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:27,671 INFO L124 PetriNetUnfolderBase]: 227/410 cut-off events. [2024-06-20 16:33:27,671 INFO L125 PetriNetUnfolderBase]: For 1403/1403 co-relation queries the response was YES. [2024-06-20 16:33:27,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1586 conditions, 410 events. 227/410 cut-off events. For 1403/1403 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1506 event pairs, 55 based on Foata normal form. 2/410 useless extension candidates. Maximal degree in co-relation 1558. Up to 365 conditions per place. [2024-06-20 16:33:27,674 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 44 selfloop transitions, 13 changer transitions 0/59 dead transitions. [2024-06-20 16:33:27,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 456 flow [2024-06-20 16:33:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-06-20 16:33:27,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-20 16:33:27,675 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 288 flow. Second operand 6 states and 71 transitions. [2024-06-20 16:33:27,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 456 flow [2024-06-20 16:33:27,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 59 transitions, 430 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:27,678 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 313 flow [2024-06-20 16:33:27,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-20 16:33:27,678 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-06-20 16:33:27,679 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 313 flow [2024-06-20 16:33:27,679 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 16:33:27,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:27,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:27,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:33:27,679 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 16:33:27,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:27,680 INFO L85 PathProgramCache]: Analyzing trace with hash 2047625877, now seen corresponding path program 2 times [2024-06-20 16:33:27,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:27,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279451058] [2024-06-20 16:33:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:27,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:28,230 INFO 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 16:33:28,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:28,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279451058] [2024-06-20 16:33:28,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279451058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:28,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:28,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:28,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599631670] [2024-06-20 16:33:28,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:28,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:28,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:28,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:28,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:28,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:28,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 313 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 16:33:28,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:28,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:28,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:28,413 INFO L124 PetriNetUnfolderBase]: 222/400 cut-off events. [2024-06-20 16:33:28,413 INFO L125 PetriNetUnfolderBase]: For 1607/1607 co-relation queries the response was YES. [2024-06-20 16:33:28,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 400 events. 222/400 cut-off events. For 1607/1607 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1450 event pairs, 53 based on Foata normal form. 1/399 useless extension candidates. Maximal degree in co-relation 1567. Up to 386 conditions per place. [2024-06-20 16:33:28,416 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 45 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2024-06-20 16:33:28,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 433 flow [2024-06-20 16:33:28,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2024-06-20 16:33:28,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-20 16:33:28,417 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 313 flow. Second operand 6 states and 63 transitions. [2024-06-20 16:33:28,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 433 flow [2024-06-20 16:33:28,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 418 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:28,421 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 319 flow [2024-06-20 16:33:28,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=319, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-06-20 16:33:28,422 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2024-06-20 16:33:28,422 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 319 flow [2024-06-20 16:33:28,423 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 16:33:28,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:28,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:28,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:33:28,423 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 16:33:28,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:28,423 INFO L85 PathProgramCache]: Analyzing trace with hash 2035121593, now seen corresponding path program 1 times [2024-06-20 16:33:28,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:28,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915320948] [2024-06-20 16:33:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:28,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:29,193 INFO 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 16:33:29,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:29,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915320948] [2024-06-20 16:33:29,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915320948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:29,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:29,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:29,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242804210] [2024-06-20 16:33:29,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:29,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:29,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:29,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:29,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:29,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:29,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 319 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 16:33:29,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:29,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:29,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:29,486 INFO L124 PetriNetUnfolderBase]: 220/397 cut-off events. [2024-06-20 16:33:29,487 INFO L125 PetriNetUnfolderBase]: For 1920/1920 co-relation queries the response was YES. [2024-06-20 16:33:29,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1615 conditions, 397 events. 220/397 cut-off events. For 1920/1920 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1441 event pairs, 52 based on Foata normal form. 1/396 useless extension candidates. Maximal degree in co-relation 1587. Up to 380 conditions per place. [2024-06-20 16:33:29,489 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 46 selfloop transitions, 10 changer transitions 0/58 dead transitions. [2024-06-20 16:33:29,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 455 flow [2024-06-20 16:33:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:29,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:29,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2024-06-20 16:33:29,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3271889400921659 [2024-06-20 16:33:29,490 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 319 flow. Second operand 7 states and 71 transitions. [2024-06-20 16:33:29,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 455 flow [2024-06-20 16:33:29,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 58 transitions, 421 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:29,493 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 322 flow [2024-06-20 16:33:29,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=322, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-06-20 16:33:29,493 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 29 predicate places. [2024-06-20 16:33:29,493 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 322 flow [2024-06-20 16:33:29,494 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 16:33:29,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:29,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:29,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:33:29,494 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 16:33:29,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:29,494 INFO L85 PathProgramCache]: Analyzing trace with hash 206416887, now seen corresponding path program 1 times [2024-06-20 16:33:29,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:29,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472326094] [2024-06-20 16:33:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:29,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:30,090 INFO 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 16:33:30,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:30,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472326094] [2024-06-20 16:33:30,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472326094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:30,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:30,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:30,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815719174] [2024-06-20 16:33:30,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:30,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:30,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:30,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:30,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:30,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:30,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 322 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 16:33:30,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:30,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:30,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:30,317 INFO L124 PetriNetUnfolderBase]: 230/414 cut-off events. [2024-06-20 16:33:30,318 INFO L125 PetriNetUnfolderBase]: For 2344/2344 co-relation queries the response was YES. [2024-06-20 16:33:30,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1728 conditions, 414 events. 230/414 cut-off events. For 2344/2344 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1520 event pairs, 50 based on Foata normal form. 3/415 useless extension candidates. Maximal degree in co-relation 1699. Up to 313 conditions per place. [2024-06-20 16:33:30,320 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 45 selfloop transitions, 25 changer transitions 0/72 dead transitions. [2024-06-20 16:33:30,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 72 transitions, 582 flow [2024-06-20 16:33:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-20 16:33:30,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4009216589861751 [2024-06-20 16:33:30,322 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 322 flow. Second operand 7 states and 87 transitions. [2024-06-20 16:33:30,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 72 transitions, 582 flow [2024-06-20 16:33:30,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 561 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:30,326 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 429 flow [2024-06-20 16:33:30,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-20 16:33:30,327 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2024-06-20 16:33:30,327 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 429 flow [2024-06-20 16:33:30,327 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 16:33:30,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:30,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:30,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:33:30,327 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 16:33:30,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:30,328 INFO L85 PathProgramCache]: Analyzing trace with hash -947868621, now seen corresponding path program 2 times [2024-06-20 16:33:30,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:30,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670679525] [2024-06-20 16:33:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:30,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:30,864 INFO 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 16:33:30,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:30,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670679525] [2024-06-20 16:33:30,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670679525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:30,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:30,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:30,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103548076] [2024-06-20 16:33:30,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:30,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:30,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:30,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:30,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:30,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:30,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 429 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 16:33:30,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:30,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:30,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:31,164 INFO L124 PetriNetUnfolderBase]: 233/419 cut-off events. [2024-06-20 16:33:31,164 INFO L125 PetriNetUnfolderBase]: For 2735/2735 co-relation queries the response was YES. [2024-06-20 16:33:31,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1909 conditions, 419 events. 233/419 cut-off events. For 2735/2735 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1544 event pairs, 49 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1878. Up to 402 conditions per place. [2024-06-20 16:33:31,167 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 57 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2024-06-20 16:33:31,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 69 transitions, 597 flow [2024-06-20 16:33:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:31,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2024-06-20 16:33:31,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3271889400921659 [2024-06-20 16:33:31,168 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 429 flow. Second operand 7 states and 71 transitions. [2024-06-20 16:33:31,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 69 transitions, 597 flow [2024-06-20 16:33:31,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 69 transitions, 580 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-20 16:33:31,172 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 459 flow [2024-06-20 16:33:31,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-06-20 16:33:31,173 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-06-20 16:33:31,173 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 459 flow [2024-06-20 16:33:31,173 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 16:33:31,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:31,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:31,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:33:31,174 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 16:33:31,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:31,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1004743249, now seen corresponding path program 3 times [2024-06-20 16:33:31,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:31,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674678070] [2024-06-20 16:33:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:31,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:31,666 INFO 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 16:33:31,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:31,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674678070] [2024-06-20 16:33:31,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674678070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:31,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:31,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:31,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735104974] [2024-06-20 16:33:31,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:31,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:31,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:31,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:31,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:31,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:31,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 459 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 16:33:31,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:31,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:31,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:31,889 INFO L124 PetriNetUnfolderBase]: 231/416 cut-off events. [2024-06-20 16:33:31,889 INFO L125 PetriNetUnfolderBase]: For 3122/3122 co-relation queries the response was YES. [2024-06-20 16:33:31,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 416 events. 231/416 cut-off events. For 3122/3122 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1526 event pairs, 49 based on Foata normal form. 1/415 useless extension candidates. Maximal degree in co-relation 1905. Up to 393 conditions per place. [2024-06-20 16:33:31,892 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 54 selfloop transitions, 13 changer transitions 0/69 dead transitions. [2024-06-20 16:33:31,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 69 transitions, 609 flow [2024-06-20 16:33:31,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2024-06-20 16:33:31,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33640552995391704 [2024-06-20 16:33:31,893 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 459 flow. Second operand 7 states and 73 transitions. [2024-06-20 16:33:31,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 69 transitions, 609 flow [2024-06-20 16:33:31,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 586 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:31,899 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 467 flow [2024-06-20 16:33:31,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=467, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2024-06-20 16:33:31,899 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2024-06-20 16:33:31,899 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 467 flow [2024-06-20 16:33:31,900 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 16:33:31,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:31,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:31,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:33:31,900 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 16:33:31,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash 383794485, now seen corresponding path program 1 times [2024-06-20 16:33:31,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:31,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782698545] [2024-06-20 16:33:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:31,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:32,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:32,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782698545] [2024-06-20 16:33:32,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782698545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:32,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:32,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:32,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130951481] [2024-06-20 16:33:32,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:32,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:32,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:32,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:32,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:32,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:32,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 467 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 16:33:32,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:32,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:32,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:33,072 INFO L124 PetriNetUnfolderBase]: 227/410 cut-off events. [2024-06-20 16:33:33,072 INFO L125 PetriNetUnfolderBase]: For 3517/3517 co-relation queries the response was YES. [2024-06-20 16:33:33,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 410 events. 227/410 cut-off events. For 3517/3517 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1491 event pairs, 47 based on Foata normal form. 2/410 useless extension candidates. Maximal degree in co-relation 1904. Up to 387 conditions per place. [2024-06-20 16:33:33,075 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 59 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2024-06-20 16:33:33,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 639 flow [2024-06-20 16:33:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:33,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-06-20 16:33:33,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-20 16:33:33,076 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 467 flow. Second operand 8 states and 80 transitions. [2024-06-20 16:33:33,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 639 flow [2024-06-20 16:33:33,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 597 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:33,080 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 468 flow [2024-06-20 16:33:33,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=468, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2024-06-20 16:33:33,081 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2024-06-20 16:33:33,081 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 468 flow [2024-06-20 16:33:33,081 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 16:33:33,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:33,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:33,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:33:33,082 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 16:33:33,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:33,082 INFO L85 PathProgramCache]: Analyzing trace with hash 934565398, now seen corresponding path program 1 times [2024-06-20 16:33:33,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:33,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427837979] [2024-06-20 16:33:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:33,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:33,800 INFO 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 16:33:33,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:33,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427837979] [2024-06-20 16:33:33,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427837979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:33,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:33,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:33,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779018016] [2024-06-20 16:33:33,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:33,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:33,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:33,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:33,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:33,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:33,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 468 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 16:33:33,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:33,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:33,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:34,030 INFO L124 PetriNetUnfolderBase]: 279/500 cut-off events. [2024-06-20 16:33:34,031 INFO L125 PetriNetUnfolderBase]: For 4296/4296 co-relation queries the response was YES. [2024-06-20 16:33:34,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2437 conditions, 500 events. 279/500 cut-off events. For 4296/4296 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1911 event pairs, 64 based on Foata normal form. 1/499 useless extension candidates. Maximal degree in co-relation 2403. Up to 414 conditions per place. [2024-06-20 16:33:34,034 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 71 selfloop transitions, 25 changer transitions 0/98 dead transitions. [2024-06-20 16:33:34,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 942 flow [2024-06-20 16:33:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:34,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-20 16:33:34,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:33:34,035 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 468 flow. Second operand 8 states and 88 transitions. [2024-06-20 16:33:34,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 942 flow [2024-06-20 16:33:34,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 98 transitions, 913 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:34,042 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 683 flow [2024-06-20 16:33:34,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=683, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-20 16:33:34,042 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2024-06-20 16:33:34,043 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 683 flow [2024-06-20 16:33:34,043 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 16:33:34,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:34,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:34,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:33:34,043 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 16:33:34,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:34,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2100232692, now seen corresponding path program 2 times [2024-06-20 16:33:34,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:34,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671462647] [2024-06-20 16:33:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:34,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:34,812 INFO 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 16:33:34,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:34,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671462647] [2024-06-20 16:33:34,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671462647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:34,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:34,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:34,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449804976] [2024-06-20 16:33:34,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:34,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:34,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:34,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:34,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:34,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:34,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 683 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 16:33:34,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:34,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:34,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:35,001 INFO L124 PetriNetUnfolderBase]: 280/501 cut-off events. [2024-06-20 16:33:35,002 INFO L125 PetriNetUnfolderBase]: For 5031/5031 co-relation queries the response was YES. [2024-06-20 16:33:35,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2618 conditions, 501 events. 280/501 cut-off events. For 5031/5031 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1927 event pairs, 51 based on Foata normal form. 2/501 useless extension candidates. Maximal degree in co-relation 2580. Up to 434 conditions per place. [2024-06-20 16:33:35,005 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 71 selfloop transitions, 20 changer transitions 0/93 dead transitions. [2024-06-20 16:33:35,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 93 transitions, 922 flow [2024-06-20 16:33:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:35,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:35,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-20 16:33:35,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-20 16:33:35,006 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 683 flow. Second operand 7 states and 78 transitions. [2024-06-20 16:33:35,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 93 transitions, 922 flow [2024-06-20 16:33:35,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 93 transitions, 910 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-20 16:33:35,014 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 758 flow [2024-06-20 16:33:35,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=758, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2024-06-20 16:33:35,014 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-20 16:33:35,014 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 758 flow [2024-06-20 16:33:35,015 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 16:33:35,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:35,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:35,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:33:35,015 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 16:33:35,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:35,015 INFO L85 PathProgramCache]: Analyzing trace with hash 938374833, now seen corresponding path program 1 times [2024-06-20 16:33:35,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:35,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809401799] [2024-06-20 16:33:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:35,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:35,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:35,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809401799] [2024-06-20 16:33:35,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809401799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:35,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:35,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:35,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040038436] [2024-06-20 16:33:35,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:35,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:35,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:35,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:35,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:35,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:35,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 758 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 16:33:35,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:35,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:35,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:35,843 INFO L124 PetriNetUnfolderBase]: 289/517 cut-off events. [2024-06-20 16:33:35,843 INFO L125 PetriNetUnfolderBase]: For 5844/5844 co-relation queries the response was YES. [2024-06-20 16:33:35,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 517 events. 289/517 cut-off events. For 5844/5844 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1997 event pairs, 67 based on Foata normal form. 2/517 useless extension candidates. Maximal degree in co-relation 2753. Up to 421 conditions per place. [2024-06-20 16:33:35,850 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 71 selfloop transitions, 34 changer transitions 0/107 dead transitions. [2024-06-20 16:33:35,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 107 transitions, 1178 flow [2024-06-20 16:33:35,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2024-06-20 16:33:35,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36693548387096775 [2024-06-20 16:33:35,852 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 758 flow. Second operand 8 states and 91 transitions. [2024-06-20 16:33:35,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 107 transitions, 1178 flow [2024-06-20 16:33:35,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 107 transitions, 1120 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:35,868 INFO L231 Difference]: Finished difference. Result has 87 places, 95 transitions, 932 flow [2024-06-20 16:33:35,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=932, PETRI_PLACES=87, PETRI_TRANSITIONS=95} [2024-06-20 16:33:35,869 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-20 16:33:35,869 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 95 transitions, 932 flow [2024-06-20 16:33:35,869 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 16:33:35,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:35,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:35,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:33:35,869 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 16:33:35,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:35,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1194201765, now seen corresponding path program 2 times [2024-06-20 16:33:35,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:35,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025141824] [2024-06-20 16:33:35,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:35,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:36,424 INFO 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 16:33:36,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:36,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025141824] [2024-06-20 16:33:36,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025141824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:36,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:36,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:36,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803428502] [2024-06-20 16:33:36,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:36,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:36,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:36,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:36,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:36,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:36,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 95 transitions, 932 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 16:33:36,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:36,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:36,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:36,659 INFO L124 PetriNetUnfolderBase]: 295/527 cut-off events. [2024-06-20 16:33:36,659 INFO L125 PetriNetUnfolderBase]: For 6635/6635 co-relation queries the response was YES. [2024-06-20 16:33:36,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2989 conditions, 527 events. 295/527 cut-off events. For 6635/6635 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2057 event pairs, 62 based on Foata normal form. 2/527 useless extension candidates. Maximal degree in co-relation 2945. Up to 352 conditions per place. [2024-06-20 16:33:36,663 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 54 selfloop transitions, 54 changer transitions 0/110 dead transitions. [2024-06-20 16:33:36,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 110 transitions, 1286 flow [2024-06-20 16:33:36,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-20 16:33:36,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-20 16:33:36,664 INFO L175 Difference]: Start difference. First operand has 87 places, 95 transitions, 932 flow. Second operand 7 states and 84 transitions. [2024-06-20 16:33:36,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 110 transitions, 1286 flow [2024-06-20 16:33:36,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 110 transitions, 1251 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:36,674 INFO L231 Difference]: Finished difference. Result has 90 places, 99 transitions, 1058 flow [2024-06-20 16:33:36,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1058, PETRI_PLACES=90, PETRI_TRANSITIONS=99} [2024-06-20 16:33:36,675 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2024-06-20 16:33:36,675 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 99 transitions, 1058 flow [2024-06-20 16:33:36,675 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 16:33:36,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:36,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:36,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:33:36,676 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 16:33:36,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2103957714, now seen corresponding path program 1 times [2024-06-20 16:33:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:36,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681834671] [2024-06-20 16:33:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:36,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:37,448 INFO 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 16:33:37,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:37,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681834671] [2024-06-20 16:33:37,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681834671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:37,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:37,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:37,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559473807] [2024-06-20 16:33:37,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:37,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:37,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:37,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:37,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:37,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:37,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 99 transitions, 1058 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 16:33:37,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:37,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:37,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:37,794 INFO L124 PetriNetUnfolderBase]: 310/552 cut-off events. [2024-06-20 16:33:37,795 INFO L125 PetriNetUnfolderBase]: For 7818/7818 co-relation queries the response was YES. [2024-06-20 16:33:37,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3227 conditions, 552 events. 310/552 cut-off events. For 7818/7818 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2196 event pairs, 58 based on Foata normal form. 3/553 useless extension candidates. Maximal degree in co-relation 3182. Up to 305 conditions per place. [2024-06-20 16:33:37,799 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 72 selfloop transitions, 47 changer transitions 0/121 dead transitions. [2024-06-20 16:33:37,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 121 transitions, 1452 flow [2024-06-20 16:33:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-20 16:33:37,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-20 16:33:37,802 INFO L175 Difference]: Start difference. First operand has 90 places, 99 transitions, 1058 flow. Second operand 8 states and 100 transitions. [2024-06-20 16:33:37,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 121 transitions, 1452 flow [2024-06-20 16:33:37,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 121 transitions, 1406 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:37,818 INFO L231 Difference]: Finished difference. Result has 95 places, 107 transitions, 1166 flow [2024-06-20 16:33:37,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1166, PETRI_PLACES=95, PETRI_TRANSITIONS=107} [2024-06-20 16:33:37,818 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-06-20 16:33:37,819 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 107 transitions, 1166 flow [2024-06-20 16:33:37,819 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 16:33:37,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:37,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:37,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:33:37,819 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 16:33:37,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:37,820 INFO L85 PathProgramCache]: Analyzing trace with hash 673493684, now seen corresponding path program 2 times [2024-06-20 16:33:37,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:37,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145959900] [2024-06-20 16:33:37,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:37,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:38,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:38,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145959900] [2024-06-20 16:33:38,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145959900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:38,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:38,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:38,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843114742] [2024-06-20 16:33:38,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:38,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:38,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:38,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:38,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:38,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:38,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 107 transitions, 1166 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 16:33:38,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:38,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:38,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:38,823 INFO L124 PetriNetUnfolderBase]: 313/557 cut-off events. [2024-06-20 16:33:38,824 INFO L125 PetriNetUnfolderBase]: For 8520/8520 co-relation queries the response was YES. [2024-06-20 16:33:38,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3390 conditions, 557 events. 313/557 cut-off events. For 8520/8520 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2203 event pairs, 63 based on Foata normal form. 1/556 useless extension candidates. Maximal degree in co-relation 3344. Up to 519 conditions per place. [2024-06-20 16:33:38,828 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 99 selfloop transitions, 18 changer transitions 0/119 dead transitions. [2024-06-20 16:33:38,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 119 transitions, 1484 flow [2024-06-20 16:33:38,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 84 transitions. [2024-06-20 16:33:38,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-20 16:33:38,829 INFO L175 Difference]: Start difference. First operand has 95 places, 107 transitions, 1166 flow. Second operand 8 states and 84 transitions. [2024-06-20 16:33:38,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 119 transitions, 1484 flow [2024-06-20 16:33:38,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 119 transitions, 1446 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:38,845 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 1201 flow [2024-06-20 16:33:38,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1201, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2024-06-20 16:33:38,845 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 70 predicate places. [2024-06-20 16:33:38,846 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 1201 flow [2024-06-20 16:33:38,846 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 16:33:38,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:38,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:38,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:33:38,846 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 16:33:38,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:38,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2046917459, now seen corresponding path program 3 times [2024-06-20 16:33:38,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:38,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775100135] [2024-06-20 16:33:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:38,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:39,327 INFO 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 16:33:39,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:39,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775100135] [2024-06-20 16:33:39,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775100135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:39,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:39,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:39,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946207020] [2024-06-20 16:33:39,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:39,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:39,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:39,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:39,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:39,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:39,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 1201 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 16:33:39,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:39,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:39,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:39,598 INFO L124 PetriNetUnfolderBase]: 310/552 cut-off events. [2024-06-20 16:33:39,598 INFO L125 PetriNetUnfolderBase]: For 9172/9172 co-relation queries the response was YES. [2024-06-20 16:33:39,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3394 conditions, 552 events. 310/552 cut-off events. For 9172/9172 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2189 event pairs, 64 based on Foata normal form. 1/551 useless extension candidates. Maximal degree in co-relation 3346. Up to 529 conditions per place. [2024-06-20 16:33:39,605 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 103 selfloop transitions, 12 changer transitions 0/117 dead transitions. [2024-06-20 16:33:39,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 117 transitions, 1445 flow [2024-06-20 16:33:39,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-06-20 16:33:39,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3317972350230415 [2024-06-20 16:33:39,606 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 1201 flow. Second operand 7 states and 72 transitions. [2024-06-20 16:33:39,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 117 transitions, 1445 flow [2024-06-20 16:33:39,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 117 transitions, 1423 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:39,623 INFO L231 Difference]: Finished difference. Result has 103 places, 111 transitions, 1208 flow [2024-06-20 16:33:39,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1208, PETRI_PLACES=103, PETRI_TRANSITIONS=111} [2024-06-20 16:33:39,623 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2024-06-20 16:33:39,624 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 111 transitions, 1208 flow [2024-06-20 16:33:39,624 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 16:33:39,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:39,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:39,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:33:39,624 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 16:33:39,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:39,625 INFO L85 PathProgramCache]: Analyzing trace with hash -249181208, now seen corresponding path program 3 times [2024-06-20 16:33:39,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:39,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320705077] [2024-06-20 16:33:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:39,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:40,388 INFO 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 16:33:40,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:40,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320705077] [2024-06-20 16:33:40,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320705077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:40,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:40,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:40,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071416940] [2024-06-20 16:33:40,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:40,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:40,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:40,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:40,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:40,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:40,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 111 transitions, 1208 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 16:33:40,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:40,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:40,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:40,763 INFO L124 PetriNetUnfolderBase]: 313/557 cut-off events. [2024-06-20 16:33:40,763 INFO L125 PetriNetUnfolderBase]: For 9917/9917 co-relation queries the response was YES. [2024-06-20 16:33:40,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3470 conditions, 557 events. 313/557 cut-off events. For 9917/9917 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2208 event pairs, 63 based on Foata normal form. 1/556 useless extension candidates. Maximal degree in co-relation 3420. Up to 531 conditions per place. [2024-06-20 16:33:40,767 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 103 selfloop transitions, 15 changer transitions 0/120 dead transitions. [2024-06-20 16:33:40,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 120 transitions, 1478 flow [2024-06-20 16:33:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:40,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:40,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-06-20 16:33:40,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-20 16:33:40,768 INFO L175 Difference]: Start difference. First operand has 103 places, 111 transitions, 1208 flow. Second operand 8 states and 80 transitions. [2024-06-20 16:33:40,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 120 transitions, 1478 flow [2024-06-20 16:33:40,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 120 transitions, 1418 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:40,784 INFO L231 Difference]: Finished difference. Result has 105 places, 113 transitions, 1205 flow [2024-06-20 16:33:40,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1205, PETRI_PLACES=105, PETRI_TRANSITIONS=113} [2024-06-20 16:33:40,785 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 75 predicate places. [2024-06-20 16:33:40,785 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 113 transitions, 1205 flow [2024-06-20 16:33:40,785 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 16:33:40,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:40,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:40,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:33:40,786 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 16:33:40,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:40,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1541770712, now seen corresponding path program 4 times [2024-06-20 16:33:40,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:40,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456936511] [2024-06-20 16:33:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:40,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:41,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:41,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456936511] [2024-06-20 16:33:41,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456936511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:41,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:41,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:41,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660489425] [2024-06-20 16:33:41,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:41,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:41,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:41,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:41,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:41,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:41,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 113 transitions, 1205 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 16:33:41,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:41,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:41,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:41,806 INFO L124 PetriNetUnfolderBase]: 311/554 cut-off events. [2024-06-20 16:33:41,806 INFO L125 PetriNetUnfolderBase]: For 10279/10279 co-relation queries the response was YES. [2024-06-20 16:33:41,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3461 conditions, 554 events. 311/554 cut-off events. For 10279/10279 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2203 event pairs, 63 based on Foata normal form. 1/553 useless extension candidates. Maximal degree in co-relation 3410. Up to 531 conditions per place. [2024-06-20 16:33:41,816 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 105 selfloop transitions, 13 changer transitions 0/120 dead transitions. [2024-06-20 16:33:41,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 120 transitions, 1457 flow [2024-06-20 16:33:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2024-06-20 16:33:41,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3185483870967742 [2024-06-20 16:33:41,818 INFO L175 Difference]: Start difference. First operand has 105 places, 113 transitions, 1205 flow. Second operand 8 states and 79 transitions. [2024-06-20 16:33:41,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 120 transitions, 1457 flow [2024-06-20 16:33:41,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 120 transitions, 1416 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:41,838 INFO L231 Difference]: Finished difference. Result has 107 places, 113 transitions, 1195 flow [2024-06-20 16:33:41,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1195, PETRI_PLACES=107, PETRI_TRANSITIONS=113} [2024-06-20 16:33:41,839 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2024-06-20 16:33:41,839 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 113 transitions, 1195 flow [2024-06-20 16:33:41,839 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 16:33:41,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:41,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:41,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:33:41,839 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 16:33:41,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash 409777612, now seen corresponding path program 3 times [2024-06-20 16:33:41,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:41,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960540439] [2024-06-20 16:33:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:41,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:42,450 INFO 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 16:33:42,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:42,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960540439] [2024-06-20 16:33:42,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960540439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:42,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:42,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:42,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090308041] [2024-06-20 16:33:42,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:42,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:42,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:42,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:42,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:42,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:42,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 113 transitions, 1195 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 16:33:42,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:42,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:42,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:42,743 INFO L124 PetriNetUnfolderBase]: 318/566 cut-off events. [2024-06-20 16:33:42,744 INFO L125 PetriNetUnfolderBase]: For 11141/11141 co-relation queries the response was YES. [2024-06-20 16:33:42,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3568 conditions, 566 events. 318/566 cut-off events. For 11141/11141 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2272 event pairs, 46 based on Foata normal form. 1/565 useless extension candidates. Maximal degree in co-relation 3516. Up to 490 conditions per place. [2024-06-20 16:33:42,747 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 105 selfloop transitions, 27 changer transitions 0/134 dead transitions. [2024-06-20 16:33:42,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 134 transitions, 1594 flow [2024-06-20 16:33:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:42,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-20 16:33:42,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:33:42,748 INFO L175 Difference]: Start difference. First operand has 107 places, 113 transitions, 1195 flow. Second operand 9 states and 99 transitions. [2024-06-20 16:33:42,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 134 transitions, 1594 flow [2024-06-20 16:33:42,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 134 transitions, 1555 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 16:33:42,767 INFO L231 Difference]: Finished difference. Result has 112 places, 121 transitions, 1342 flow [2024-06-20 16:33:42,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1342, PETRI_PLACES=112, PETRI_TRANSITIONS=121} [2024-06-20 16:33:42,768 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-06-20 16:33:42,768 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 121 transitions, 1342 flow [2024-06-20 16:33:42,768 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 16:33:42,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:42,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:42,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:33:42,769 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 16:33:42,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:42,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2125148088, now seen corresponding path program 4 times [2024-06-20 16:33:42,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:42,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327443124] [2024-06-20 16:33:42,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:42,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:43,307 INFO 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 16:33:43,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:43,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327443124] [2024-06-20 16:33:43,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327443124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:43,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:43,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:43,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472847058] [2024-06-20 16:33:43,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:43,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:43,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:43,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:43,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:43,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:43,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 121 transitions, 1342 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 16:33:43,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:43,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:43,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:43,683 INFO L124 PetriNetUnfolderBase]: 314/559 cut-off events. [2024-06-20 16:33:43,683 INFO L125 PetriNetUnfolderBase]: For 11965/11965 co-relation queries the response was YES. [2024-06-20 16:33:43,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3643 conditions, 559 events. 314/559 cut-off events. For 11965/11965 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2225 event pairs, 55 based on Foata normal form. 1/558 useless extension candidates. Maximal degree in co-relation 3587. Up to 400 conditions per place. [2024-06-20 16:33:43,687 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 84 selfloop transitions, 52 changer transitions 0/138 dead transitions. [2024-06-20 16:33:43,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 138 transitions, 1782 flow [2024-06-20 16:33:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-20 16:33:43,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-20 16:33:43,689 INFO L175 Difference]: Start difference. First operand has 112 places, 121 transitions, 1342 flow. Second operand 8 states and 95 transitions. [2024-06-20 16:33:43,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 138 transitions, 1782 flow [2024-06-20 16:33:43,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 138 transitions, 1710 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:43,707 INFO L231 Difference]: Finished difference. Result has 117 places, 124 transitions, 1449 flow [2024-06-20 16:33:43,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1449, PETRI_PLACES=117, PETRI_TRANSITIONS=124} [2024-06-20 16:33:43,708 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 87 predicate places. [2024-06-20 16:33:43,708 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 124 transitions, 1449 flow [2024-06-20 16:33:43,708 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 16:33:43,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:43,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:43,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:33:43,708 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 16:33:43,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:43,709 INFO L85 PathProgramCache]: Analyzing trace with hash 132121009, now seen corresponding path program 4 times [2024-06-20 16:33:43,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:43,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112566546] [2024-06-20 16:33:43,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:43,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:44,239 INFO 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 16:33:44,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:44,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112566546] [2024-06-20 16:33:44,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112566546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:44,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:44,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:44,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967455889] [2024-06-20 16:33:44,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:44,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:44,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:44,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:44,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:44,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:44,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 124 transitions, 1449 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 16:33:44,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:44,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:44,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:44,580 INFO L124 PetriNetUnfolderBase]: 316/562 cut-off events. [2024-06-20 16:33:44,581 INFO L125 PetriNetUnfolderBase]: For 12937/12937 co-relation queries the response was YES. [2024-06-20 16:33:44,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3764 conditions, 562 events. 316/562 cut-off events. For 12937/12937 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2233 event pairs, 56 based on Foata normal form. 2/562 useless extension candidates. Maximal degree in co-relation 3707. Up to 376 conditions per place. [2024-06-20 16:33:44,586 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 90 selfloop transitions, 51 changer transitions 0/143 dead transitions. [2024-06-20 16:33:44,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 143 transitions, 1956 flow [2024-06-20 16:33:44,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:44,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:44,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-20 16:33:44,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-20 16:33:44,588 INFO L175 Difference]: Start difference. First operand has 117 places, 124 transitions, 1449 flow. Second operand 8 states and 100 transitions. [2024-06-20 16:33:44,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 143 transitions, 1956 flow [2024-06-20 16:33:44,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 143 transitions, 1851 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:44,611 INFO L231 Difference]: Finished difference. Result has 123 places, 129 transitions, 1566 flow [2024-06-20 16:33:44,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1566, PETRI_PLACES=123, PETRI_TRANSITIONS=129} [2024-06-20 16:33:44,611 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2024-06-20 16:33:44,611 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 129 transitions, 1566 flow [2024-06-20 16:33:44,612 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 16:33:44,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:44,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:44,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:33:44,612 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 16:33:44,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:44,613 INFO L85 PathProgramCache]: Analyzing trace with hash 679848410, now seen corresponding path program 1 times [2024-06-20 16:33:44,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:44,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106897763] [2024-06-20 16:33:44,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:44,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:45,342 INFO 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 16:33:45,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:45,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106897763] [2024-06-20 16:33:45,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106897763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:45,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:45,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:45,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544142683] [2024-06-20 16:33:45,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:45,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:45,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:45,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:45,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:45,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:45,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 1566 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 16:33:45,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:45,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:45,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:45,648 INFO L124 PetriNetUnfolderBase]: 320/570 cut-off events. [2024-06-20 16:33:45,648 INFO L125 PetriNetUnfolderBase]: For 13899/13899 co-relation queries the response was YES. [2024-06-20 16:33:45,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3884 conditions, 570 events. 320/570 cut-off events. For 13899/13899 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2294 event pairs, 28 based on Foata normal form. 2/570 useless extension candidates. Maximal degree in co-relation 3824. Up to 400 conditions per place. [2024-06-20 16:33:45,653 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 106 selfloop transitions, 37 changer transitions 0/145 dead transitions. [2024-06-20 16:33:45,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 145 transitions, 1967 flow [2024-06-20 16:33:45,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-20 16:33:45,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-20 16:33:45,654 INFO L175 Difference]: Start difference. First operand has 123 places, 129 transitions, 1566 flow. Second operand 8 states and 89 transitions. [2024-06-20 16:33:45,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 145 transitions, 1967 flow [2024-06-20 16:33:45,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 145 transitions, 1808 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:45,710 INFO L231 Difference]: Finished difference. Result has 126 places, 131 transitions, 1538 flow [2024-06-20 16:33:45,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1538, PETRI_PLACES=126, PETRI_TRANSITIONS=131} [2024-06-20 16:33:45,710 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2024-06-20 16:33:45,711 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 131 transitions, 1538 flow [2024-06-20 16:33:45,711 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 16:33:45,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:45,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:45,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:33:45,711 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 16:33:45,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:45,712 INFO L85 PathProgramCache]: Analyzing trace with hash 679908860, now seen corresponding path program 2 times [2024-06-20 16:33:45,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:45,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839432394] [2024-06-20 16:33:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:45,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:46,602 INFO 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 16:33:46,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:46,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839432394] [2024-06-20 16:33:46,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839432394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:46,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:46,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:46,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050544264] [2024-06-20 16:33:46,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:46,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:46,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:46,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:46,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:46,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:46,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 131 transitions, 1538 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 16:33:46,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:46,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:46,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:46,916 INFO L124 PetriNetUnfolderBase]: 317/565 cut-off events. [2024-06-20 16:33:46,916 INFO L125 PetriNetUnfolderBase]: For 13961/13961 co-relation queries the response was YES. [2024-06-20 16:33:46,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3789 conditions, 565 events. 317/565 cut-off events. For 13961/13961 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2269 event pairs, 44 based on Foata normal form. 2/565 useless extension candidates. Maximal degree in co-relation 3728. Up to 441 conditions per place. [2024-06-20 16:33:46,920 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 97 selfloop transitions, 45 changer transitions 0/144 dead transitions. [2024-06-20 16:33:46,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 144 transitions, 1854 flow [2024-06-20 16:33:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:46,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-20 16:33:46,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-20 16:33:46,921 INFO L175 Difference]: Start difference. First operand has 126 places, 131 transitions, 1538 flow. Second operand 9 states and 98 transitions. [2024-06-20 16:33:46,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 144 transitions, 1854 flow [2024-06-20 16:33:46,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 144 transitions, 1774 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:46,946 INFO L231 Difference]: Finished difference. Result has 130 places, 131 transitions, 1556 flow [2024-06-20 16:33:46,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1458, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1556, PETRI_PLACES=130, PETRI_TRANSITIONS=131} [2024-06-20 16:33:46,947 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2024-06-20 16:33:46,947 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 131 transitions, 1556 flow [2024-06-20 16:33:46,947 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 16:33:46,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:46,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:46,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:33:46,947 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 16:33:46,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:46,948 INFO L85 PathProgramCache]: Analyzing trace with hash 682710144, now seen corresponding path program 1 times [2024-06-20 16:33:46,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:46,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392497108] [2024-06-20 16:33:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:46,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:47,672 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 16:33:47,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:47,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392497108] [2024-06-20 16:33:47,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392497108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:47,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:47,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:47,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723660511] [2024-06-20 16:33:47,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:47,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:47,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:47,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:47,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:47,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:47,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 131 transitions, 1556 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 16:33:47,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:47,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:47,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:47,902 INFO L124 PetriNetUnfolderBase]: 313/559 cut-off events. [2024-06-20 16:33:47,902 INFO L125 PetriNetUnfolderBase]: For 14122/14122 co-relation queries the response was YES. [2024-06-20 16:33:47,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3720 conditions, 559 events. 313/559 cut-off events. For 14122/14122 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2250 event pairs, 48 based on Foata normal form. 2/559 useless extension candidates. Maximal degree in co-relation 3659. Up to 449 conditions per place. [2024-06-20 16:33:47,906 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 95 selfloop transitions, 43 changer transitions 0/140 dead transitions. [2024-06-20 16:33:47,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 140 transitions, 1854 flow [2024-06-20 16:33:47,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-20 16:33:47,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-20 16:33:47,908 INFO L175 Difference]: Start difference. First operand has 130 places, 131 transitions, 1556 flow. Second operand 8 states and 89 transitions. [2024-06-20 16:33:47,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 140 transitions, 1854 flow [2024-06-20 16:33:47,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 140 transitions, 1738 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 16:33:47,932 INFO L231 Difference]: Finished difference. Result has 130 places, 131 transitions, 1534 flow [2024-06-20 16:33:47,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1534, PETRI_PLACES=130, PETRI_TRANSITIONS=131} [2024-06-20 16:33:47,933 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2024-06-20 16:33:47,933 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 131 transitions, 1534 flow [2024-06-20 16:33:47,934 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 16:33:47,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:47,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:47,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:33:47,934 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 16:33:47,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:47,934 INFO L85 PathProgramCache]: Analyzing trace with hash 798001500, now seen corresponding path program 1 times [2024-06-20 16:33:47,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:47,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194629069] [2024-06-20 16:33:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:47,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:48,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:48,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194629069] [2024-06-20 16:33:48,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194629069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:48,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:48,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:48,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396901251] [2024-06-20 16:33:48,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:48,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:48,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:48,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:48,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:48,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:48,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 131 transitions, 1534 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 16:33:48,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:48,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:48,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:48,977 INFO L124 PetriNetUnfolderBase]: 319/569 cut-off events. [2024-06-20 16:33:48,977 INFO L125 PetriNetUnfolderBase]: For 15026/15026 co-relation queries the response was YES. [2024-06-20 16:33:48,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3733 conditions, 569 events. 319/569 cut-off events. For 15026/15026 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2306 event pairs, 51 based on Foata normal form. 2/569 useless extension candidates. Maximal degree in co-relation 3672. Up to 313 conditions per place. [2024-06-20 16:33:48,981 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 78 selfloop transitions, 69 changer transitions 0/149 dead transitions. [2024-06-20 16:33:48,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 149 transitions, 2013 flow [2024-06-20 16:33:48,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:48,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-20 16:33:48,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-06-20 16:33:48,982 INFO L175 Difference]: Start difference. First operand has 130 places, 131 transitions, 1534 flow. Second operand 8 states and 101 transitions. [2024-06-20 16:33:48,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 149 transitions, 2013 flow [2024-06-20 16:33:49,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 149 transitions, 1877 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:33:49,006 INFO L231 Difference]: Finished difference. Result has 131 places, 134 transitions, 1569 flow [2024-06-20 16:33:49,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1569, PETRI_PLACES=131, PETRI_TRANSITIONS=134} [2024-06-20 16:33:49,007 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-06-20 16:33:49,007 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 134 transitions, 1569 flow [2024-06-20 16:33:49,007 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 16:33:49,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:49,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:49,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:33:49,007 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 16:33:49,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:49,008 INFO L85 PathProgramCache]: Analyzing trace with hash 798174480, now seen corresponding path program 2 times [2024-06-20 16:33:49,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:49,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295172503] [2024-06-20 16:33:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:49,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:49,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:49,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295172503] [2024-06-20 16:33:49,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295172503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:49,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:49,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:49,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189329608] [2024-06-20 16:33:49,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:49,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:49,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:49,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:49,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:49,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:49,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 134 transitions, 1569 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 16:33:49,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:49,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:49,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:50,067 INFO L124 PetriNetUnfolderBase]: 327/582 cut-off events. [2024-06-20 16:33:50,067 INFO L125 PetriNetUnfolderBase]: For 15889/15889 co-relation queries the response was YES. [2024-06-20 16:33:50,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3900 conditions, 582 events. 327/582 cut-off events. For 15889/15889 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2367 event pairs, 58 based on Foata normal form. 1/581 useless extension candidates. Maximal degree in co-relation 3838. Up to 318 conditions per place. [2024-06-20 16:33:50,071 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 80 selfloop transitions, 68 changer transitions 0/150 dead transitions. [2024-06-20 16:33:50,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 150 transitions, 2055 flow [2024-06-20 16:33:50,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:50,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-20 16:33:50,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-20 16:33:50,073 INFO L175 Difference]: Start difference. First operand has 131 places, 134 transitions, 1569 flow. Second operand 8 states and 96 transitions. [2024-06-20 16:33:50,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 150 transitions, 2055 flow [2024-06-20 16:33:50,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 150 transitions, 1904 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:50,101 INFO L231 Difference]: Finished difference. Result has 134 places, 138 transitions, 1611 flow [2024-06-20 16:33:50,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1611, PETRI_PLACES=134, PETRI_TRANSITIONS=138} [2024-06-20 16:33:50,101 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2024-06-20 16:33:50,101 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 138 transitions, 1611 flow [2024-06-20 16:33:50,101 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 16:33:50,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:50,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:50,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:33:50,102 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 16:33:50,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:50,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1634458972, now seen corresponding path program 3 times [2024-06-20 16:33:50,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:50,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601430479] [2024-06-20 16:33:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:50,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:50,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:50,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601430479] [2024-06-20 16:33:50,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601430479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:50,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:50,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:50,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201302282] [2024-06-20 16:33:50,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:50,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:50,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:50,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:50,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:50,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:50,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 138 transitions, 1611 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 16:33:50,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:50,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:50,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:51,174 INFO L124 PetriNetUnfolderBase]: 325/579 cut-off events. [2024-06-20 16:33:51,175 INFO L125 PetriNetUnfolderBase]: For 16390/16390 co-relation queries the response was YES. [2024-06-20 16:33:51,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3927 conditions, 579 events. 325/579 cut-off events. For 16390/16390 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2348 event pairs, 58 based on Foata normal form. 1/578 useless extension candidates. Maximal degree in co-relation 3863. Up to 317 conditions per place. [2024-06-20 16:33:51,179 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 73 selfloop transitions, 74 changer transitions 0/149 dead transitions. [2024-06-20 16:33:51,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 149 transitions, 2003 flow [2024-06-20 16:33:51,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:51,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:51,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-20 16:33:51,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-20 16:33:51,202 INFO L175 Difference]: Start difference. First operand has 134 places, 138 transitions, 1611 flow. Second operand 8 states and 95 transitions. [2024-06-20 16:33:51,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 149 transitions, 2003 flow [2024-06-20 16:33:51,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 149 transitions, 1915 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:51,229 INFO L231 Difference]: Finished difference. Result has 138 places, 138 transitions, 1677 flow [2024-06-20 16:33:51,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1677, PETRI_PLACES=138, PETRI_TRANSITIONS=138} [2024-06-20 16:33:51,231 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 108 predicate places. [2024-06-20 16:33:51,231 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 138 transitions, 1677 flow [2024-06-20 16:33:51,231 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 16:33:51,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:51,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:51,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:33:51,231 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 16:33:51,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:51,232 INFO L85 PathProgramCache]: Analyzing trace with hash -974969998, now seen corresponding path program 1 times [2024-06-20 16:33:51,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:51,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188523308] [2024-06-20 16:33:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:51,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:52,239 INFO 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 16:33:52,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:52,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188523308] [2024-06-20 16:33:52,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188523308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:52,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:52,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:52,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366372230] [2024-06-20 16:33:52,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:52,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:52,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:52,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:52,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:52,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:52,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 138 transitions, 1677 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 16:33:52,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:52,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:52,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:52,655 INFO L124 PetriNetUnfolderBase]: 353/625 cut-off events. [2024-06-20 16:33:52,655 INFO L125 PetriNetUnfolderBase]: For 21020/21020 co-relation queries the response was YES. [2024-06-20 16:33:52,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4239 conditions, 625 events. 353/625 cut-off events. For 21020/21020 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2578 event pairs, 53 based on Foata normal form. 6/629 useless extension candidates. Maximal degree in co-relation 4174. Up to 264 conditions per place. [2024-06-20 16:33:52,659 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 94 selfloop transitions, 68 changer transitions 0/164 dead transitions. [2024-06-20 16:33:52,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 164 transitions, 2245 flow [2024-06-20 16:33:52,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:52,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:52,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-20 16:33:52,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-20 16:33:52,661 INFO L175 Difference]: Start difference. First operand has 138 places, 138 transitions, 1677 flow. Second operand 9 states and 117 transitions. [2024-06-20 16:33:52,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 164 transitions, 2245 flow [2024-06-20 16:33:52,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 164 transitions, 2088 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 16:33:52,694 INFO L231 Difference]: Finished difference. Result has 140 places, 146 transitions, 1729 flow [2024-06-20 16:33:52,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1729, PETRI_PLACES=140, PETRI_TRANSITIONS=146} [2024-06-20 16:33:52,694 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 110 predicate places. [2024-06-20 16:33:52,695 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 146 transitions, 1729 flow [2024-06-20 16:33:52,695 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 16:33:52,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:52,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:52,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:33:52,695 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 16:33:52,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:52,696 INFO L85 PathProgramCache]: Analyzing trace with hash -360355372, now seen corresponding path program 2 times [2024-06-20 16:33:52,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:52,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367691787] [2024-06-20 16:33:52,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:52,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:53,580 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 16:33:53,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:53,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367691787] [2024-06-20 16:33:53,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367691787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:53,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:53,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:53,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169384200] [2024-06-20 16:33:53,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:53,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:53,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:53,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:53,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:53,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:53,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 146 transitions, 1729 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 16:33:53,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:53,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:53,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:53,954 INFO L124 PetriNetUnfolderBase]: 369/651 cut-off events. [2024-06-20 16:33:53,954 INFO L125 PetriNetUnfolderBase]: For 21283/21283 co-relation queries the response was YES. [2024-06-20 16:33:53,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4507 conditions, 651 events. 369/651 cut-off events. For 21283/21283 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2708 event pairs, 61 based on Foata normal form. 2/651 useless extension candidates. Maximal degree in co-relation 4441. Up to 605 conditions per place. [2024-06-20 16:33:53,959 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 142 selfloop transitions, 18 changer transitions 0/162 dead transitions. [2024-06-20 16:33:53,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 162 transitions, 2177 flow [2024-06-20 16:33:53,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:53,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:53,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-06-20 16:33:53,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-20 16:33:53,961 INFO L175 Difference]: Start difference. First operand has 140 places, 146 transitions, 1729 flow. Second operand 9 states and 93 transitions. [2024-06-20 16:33:53,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 162 transitions, 2177 flow [2024-06-20 16:33:53,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 162 transitions, 2116 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:54,001 INFO L231 Difference]: Finished difference. Result has 145 places, 150 transitions, 1749 flow [2024-06-20 16:33:54,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1749, PETRI_PLACES=145, PETRI_TRANSITIONS=150} [2024-06-20 16:33:54,001 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-20 16:33:54,001 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 150 transitions, 1749 flow [2024-06-20 16:33:54,001 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 16:33:54,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:54,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:54,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:33:54,002 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 16:33:54,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:54,002 INFO L85 PathProgramCache]: Analyzing trace with hash -770870530, now seen corresponding path program 4 times [2024-06-20 16:33:54,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:54,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626942873] [2024-06-20 16:33:54,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:54,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:54,680 INFO 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 16:33:54,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:54,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626942873] [2024-06-20 16:33:54,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626942873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:54,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:54,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:54,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813946787] [2024-06-20 16:33:54,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:54,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:54,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:54,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:54,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:54,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:54,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 150 transitions, 1749 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 16:33:54,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:54,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:54,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:55,022 INFO L124 PetriNetUnfolderBase]: 377/664 cut-off events. [2024-06-20 16:33:55,022 INFO L125 PetriNetUnfolderBase]: For 22739/22739 co-relation queries the response was YES. [2024-06-20 16:33:55,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4627 conditions, 664 events. 377/664 cut-off events. For 22739/22739 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2777 event pairs, 68 based on Foata normal form. 1/663 useless extension candidates. Maximal degree in co-relation 4559. Up to 628 conditions per place. [2024-06-20 16:33:55,027 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 141 selfloop transitions, 19 changer transitions 0/162 dead transitions. [2024-06-20 16:33:55,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 162 transitions, 2197 flow [2024-06-20 16:33:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 84 transitions. [2024-06-20 16:33:55,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-20 16:33:55,028 INFO L175 Difference]: Start difference. First operand has 145 places, 150 transitions, 1749 flow. Second operand 8 states and 84 transitions. [2024-06-20 16:33:55,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 162 transitions, 2197 flow [2024-06-20 16:33:55,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 162 transitions, 2167 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:55,069 INFO L231 Difference]: Finished difference. Result has 148 places, 154 transitions, 1808 flow [2024-06-20 16:33:55,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1808, PETRI_PLACES=148, PETRI_TRANSITIONS=154} [2024-06-20 16:33:55,070 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2024-06-20 16:33:55,070 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 154 transitions, 1808 flow [2024-06-20 16:33:55,070 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 16:33:55,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:55,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:55,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:33:55,071 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 16:33:55,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:55,071 INFO L85 PathProgramCache]: Analyzing trace with hash -368629830, now seen corresponding path program 5 times [2024-06-20 16:33:55,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:55,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122825748] [2024-06-20 16:33:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:55,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:55,704 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 16:33:55,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:55,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122825748] [2024-06-20 16:33:55,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122825748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:55,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:55,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:55,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851296780] [2024-06-20 16:33:55,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:55,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:55,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:55,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:55,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:55,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:55,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 154 transitions, 1808 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 16:33:55,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:55,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:55,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:56,008 INFO L124 PetriNetUnfolderBase]: 375/661 cut-off events. [2024-06-20 16:33:56,008 INFO L125 PetriNetUnfolderBase]: For 23285/23285 co-relation queries the response was YES. [2024-06-20 16:33:56,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4640 conditions, 661 events. 375/661 cut-off events. For 23285/23285 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2763 event pairs, 68 based on Foata normal form. 1/660 useless extension candidates. Maximal degree in co-relation 4570. Up to 626 conditions per place. [2024-06-20 16:33:56,014 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 140 selfloop transitions, 19 changer transitions 0/161 dead transitions. [2024-06-20 16:33:56,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 161 transitions, 2142 flow [2024-06-20 16:33:56,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:56,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 83 transitions. [2024-06-20 16:33:56,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3346774193548387 [2024-06-20 16:33:56,016 INFO L175 Difference]: Start difference. First operand has 148 places, 154 transitions, 1808 flow. Second operand 8 states and 83 transitions. [2024-06-20 16:33:56,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 161 transitions, 2142 flow [2024-06-20 16:33:56,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 161 transitions, 2099 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:56,063 INFO L231 Difference]: Finished difference. Result has 152 places, 154 transitions, 1808 flow [2024-06-20 16:33:56,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1808, PETRI_PLACES=152, PETRI_TRANSITIONS=154} [2024-06-20 16:33:56,064 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 122 predicate places. [2024-06-20 16:33:56,064 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 154 transitions, 1808 flow [2024-06-20 16:33:56,064 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 16:33:56,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:56,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:56,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:33:56,065 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 16:33:56,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:56,065 INFO L85 PathProgramCache]: Analyzing trace with hash -360355620, now seen corresponding path program 6 times [2024-06-20 16:33:56,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:56,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209352374] [2024-06-20 16:33:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:56,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:56,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:56,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209352374] [2024-06-20 16:33:56,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209352374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:56,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:56,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:56,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590183395] [2024-06-20 16:33:56,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:56,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:56,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:56,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:56,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:56,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:56,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 154 transitions, 1808 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 16:33:56,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:56,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:56,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:57,090 INFO L124 PetriNetUnfolderBase]: 373/658 cut-off events. [2024-06-20 16:33:57,090 INFO L125 PetriNetUnfolderBase]: For 23789/23789 co-relation queries the response was YES. [2024-06-20 16:33:57,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4630 conditions, 658 events. 373/658 cut-off events. For 23789/23789 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2756 event pairs, 67 based on Foata normal form. 1/657 useless extension candidates. Maximal degree in co-relation 4558. Up to 632 conditions per place. [2024-06-20 16:33:57,095 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 147 selfloop transitions, 14 changer transitions 0/163 dead transitions. [2024-06-20 16:33:57,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 163 transitions, 2171 flow [2024-06-20 16:33:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-06-20 16:33:57,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-20 16:33:57,097 INFO L175 Difference]: Start difference. First operand has 152 places, 154 transitions, 1808 flow. Second operand 8 states and 80 transitions. [2024-06-20 16:33:57,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 163 transitions, 2171 flow [2024-06-20 16:33:57,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 163 transitions, 2128 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 16:33:57,145 INFO L231 Difference]: Finished difference. Result has 153 places, 156 transitions, 1827 flow [2024-06-20 16:33:57,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1827, PETRI_PLACES=153, PETRI_TRANSITIONS=156} [2024-06-20 16:33:57,146 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2024-06-20 16:33:57,146 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 156 transitions, 1827 flow [2024-06-20 16:33:57,146 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 16:33:57,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:57,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:57,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:33:57,146 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 16:33:57,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:57,147 INFO L85 PathProgramCache]: Analyzing trace with hash -368629582, now seen corresponding path program 3 times [2024-06-20 16:33:57,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:57,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170383826] [2024-06-20 16:33:57,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:57,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:58,097 INFO 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 16:33:58,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:58,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170383826] [2024-06-20 16:33:58,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170383826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:58,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:58,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:58,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917732078] [2024-06-20 16:33:58,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:58,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:58,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:58,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:58,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:58,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:58,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 156 transitions, 1827 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 16:33:58,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:58,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:58,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:58,492 INFO L124 PetriNetUnfolderBase]: 384/676 cut-off events. [2024-06-20 16:33:58,492 INFO L125 PetriNetUnfolderBase]: For 26613/26613 co-relation queries the response was YES. [2024-06-20 16:33:58,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4795 conditions, 676 events. 384/676 cut-off events. For 26613/26613 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2850 event pairs, 64 based on Foata normal form. 2/676 useless extension candidates. Maximal degree in co-relation 4722. Up to 620 conditions per place. [2024-06-20 16:33:58,497 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 147 selfloop transitions, 24 changer transitions 0/173 dead transitions. [2024-06-20 16:33:58,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 173 transitions, 2317 flow [2024-06-20 16:33:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:58,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-20 16:33:58,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34050179211469533 [2024-06-20 16:33:58,498 INFO L175 Difference]: Start difference. First operand has 153 places, 156 transitions, 1827 flow. Second operand 9 states and 95 transitions. [2024-06-20 16:33:58,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 173 transitions, 2317 flow [2024-06-20 16:33:58,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 173 transitions, 2274 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:58,554 INFO L231 Difference]: Finished difference. Result has 158 places, 162 transitions, 1912 flow [2024-06-20 16:33:58,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1912, PETRI_PLACES=158, PETRI_TRANSITIONS=162} [2024-06-20 16:33:58,554 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-06-20 16:33:58,554 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 162 transitions, 1912 flow [2024-06-20 16:33:58,554 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 16:33:58,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:58,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:58,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:33:58,555 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 16:33:58,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:58,555 INFO L85 PathProgramCache]: Analyzing trace with hash -777119882, now seen corresponding path program 4 times [2024-06-20 16:33:58,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:58,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044104377] [2024-06-20 16:33:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:58,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:59,483 INFO 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 16:33:59,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:59,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044104377] [2024-06-20 16:33:59,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044104377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:59,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:59,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:59,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296621585] [2024-06-20 16:33:59,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:59,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:59,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:59,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:59,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:59,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:59,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 162 transitions, 1912 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 16:33:59,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:59,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:59,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:59,906 INFO L124 PetriNetUnfolderBase]: 380/670 cut-off events. [2024-06-20 16:33:59,906 INFO L125 PetriNetUnfolderBase]: For 26515/26515 co-relation queries the response was YES. [2024-06-20 16:33:59,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4830 conditions, 670 events. 380/670 cut-off events. For 26515/26515 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2847 event pairs, 63 based on Foata normal form. 2/670 useless extension candidates. Maximal degree in co-relation 4754. Up to 595 conditions per place. [2024-06-20 16:33:59,911 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 143 selfloop transitions, 30 changer transitions 0/175 dead transitions. [2024-06-20 16:33:59,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 175 transitions, 2388 flow [2024-06-20 16:33:59,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:59,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-20 16:33:59,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-20 16:33:59,912 INFO L175 Difference]: Start difference. First operand has 158 places, 162 transitions, 1912 flow. Second operand 9 states and 97 transitions. [2024-06-20 16:33:59,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 175 transitions, 2388 flow [2024-06-20 16:33:59,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 175 transitions, 2348 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:59,970 INFO L231 Difference]: Finished difference. Result has 163 places, 164 transitions, 1967 flow [2024-06-20 16:33:59,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1967, PETRI_PLACES=163, PETRI_TRANSITIONS=164} [2024-06-20 16:33:59,971 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-20 16:33:59,971 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 164 transitions, 1967 flow [2024-06-20 16:33:59,971 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 16:33:59,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:59,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:59,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:33:59,972 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 16:33:59,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:59,972 INFO L85 PathProgramCache]: Analyzing trace with hash -540647852, now seen corresponding path program 5 times [2024-06-20 16:33:59,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:59,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734930773] [2024-06-20 16:33:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:59,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:00,885 INFO 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 16:34:00,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:00,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734930773] [2024-06-20 16:34:00,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734930773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:00,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:00,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:00,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778618303] [2024-06-20 16:34:00,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:00,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:00,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:00,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:00,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:00,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:00,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 164 transitions, 1967 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 16:34:00,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:00,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:00,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:01,278 INFO L124 PetriNetUnfolderBase]: 374/661 cut-off events. [2024-06-20 16:34:01,278 INFO L125 PetriNetUnfolderBase]: For 26290/26290 co-relation queries the response was YES. [2024-06-20 16:34:01,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4715 conditions, 661 events. 374/661 cut-off events. For 26290/26290 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2779 event pairs, 62 based on Foata normal form. 3/662 useless extension candidates. Maximal degree in co-relation 4638. Up to 626 conditions per place. [2024-06-20 16:34:01,283 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 153 selfloop transitions, 18 changer transitions 0/173 dead transitions. [2024-06-20 16:34:01,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 173 transitions, 2331 flow [2024-06-20 16:34:01,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2024-06-20 16:34:01,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31899641577060933 [2024-06-20 16:34:01,285 INFO L175 Difference]: Start difference. First operand has 163 places, 164 transitions, 1967 flow. Second operand 9 states and 89 transitions. [2024-06-20 16:34:01,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 173 transitions, 2331 flow [2024-06-20 16:34:01,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 173 transitions, 2238 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:01,342 INFO L231 Difference]: Finished difference. Result has 165 places, 164 transitions, 1918 flow [2024-06-20 16:34:01,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1918, PETRI_PLACES=165, PETRI_TRANSITIONS=164} [2024-06-20 16:34:01,343 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2024-06-20 16:34:01,343 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 164 transitions, 1918 flow [2024-06-20 16:34:01,343 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 16:34:01,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:01,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:01,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:34:01,343 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 16:34:01,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:01,344 INFO L85 PathProgramCache]: Analyzing trace with hash -540636940, now seen corresponding path program 1 times [2024-06-20 16:34:01,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:01,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082260027] [2024-06-20 16:34:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:01,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:02,734 INFO 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 16:34:02,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:02,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082260027] [2024-06-20 16:34:02,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082260027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:02,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:02,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:02,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827240652] [2024-06-20 16:34:02,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:02,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:02,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:02,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:02,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:02,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:02,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 164 transitions, 1918 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:02,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:02,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:02,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:03,149 INFO L124 PetriNetUnfolderBase]: 371/656 cut-off events. [2024-06-20 16:34:03,150 INFO L125 PetriNetUnfolderBase]: For 24941/24941 co-relation queries the response was YES. [2024-06-20 16:34:03,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4572 conditions, 656 events. 371/656 cut-off events. For 24941/24941 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2759 event pairs, 61 based on Foata normal form. 2/656 useless extension candidates. Maximal degree in co-relation 4494. Up to 624 conditions per place. [2024-06-20 16:34:03,154 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 156 selfloop transitions, 15 changer transitions 0/173 dead transitions. [2024-06-20 16:34:03,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 173 transitions, 2280 flow [2024-06-20 16:34:03,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-06-20 16:34:03,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3118279569892473 [2024-06-20 16:34:03,155 INFO L175 Difference]: Start difference. First operand has 165 places, 164 transitions, 1918 flow. Second operand 9 states and 87 transitions. [2024-06-20 16:34:03,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 173 transitions, 2280 flow [2024-06-20 16:34:03,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 173 transitions, 2237 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:03,211 INFO L231 Difference]: Finished difference. Result has 166 places, 164 transitions, 1909 flow [2024-06-20 16:34:03,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1909, PETRI_PLACES=166, PETRI_TRANSITIONS=164} [2024-06-20 16:34:03,211 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2024-06-20 16:34:03,211 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 164 transitions, 1909 flow [2024-06-20 16:34:03,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:03,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:03,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:03,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:34:03,212 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 16:34:03,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:03,212 INFO L85 PathProgramCache]: Analyzing trace with hash 467352244, now seen corresponding path program 1 times [2024-06-20 16:34:03,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:03,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467747148] [2024-06-20 16:34:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:03,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:03,877 INFO 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 16:34:03,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:03,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467747148] [2024-06-20 16:34:03,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467747148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:03,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:03,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:03,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706925547] [2024-06-20 16:34:03,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:03,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:03,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:03,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:03,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:03,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:03,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 164 transitions, 1909 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 16:34:03,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:03,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:03,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:04,131 INFO L124 PetriNetUnfolderBase]: 375/664 cut-off events. [2024-06-20 16:34:04,131 INFO L125 PetriNetUnfolderBase]: For 26054/26054 co-relation queries the response was YES. [2024-06-20 16:34:04,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4617 conditions, 664 events. 375/664 cut-off events. For 26054/26054 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2825 event pairs, 42 based on Foata normal form. 2/664 useless extension candidates. Maximal degree in co-relation 4538. Up to 380 conditions per place. [2024-06-20 16:34:04,135 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 129 selfloop transitions, 47 changer transitions 0/178 dead transitions. [2024-06-20 16:34:04,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 178 transitions, 2381 flow [2024-06-20 16:34:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:04,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:04,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-20 16:34:04,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:34:04,137 INFO L175 Difference]: Start difference. First operand has 166 places, 164 transitions, 1909 flow. Second operand 8 states and 88 transitions. [2024-06-20 16:34:04,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 178 transitions, 2381 flow [2024-06-20 16:34:04,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 178 transitions, 2339 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:04,196 INFO L231 Difference]: Finished difference. Result has 166 places, 165 transitions, 1973 flow [2024-06-20 16:34:04,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1973, PETRI_PLACES=166, PETRI_TRANSITIONS=165} [2024-06-20 16:34:04,199 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2024-06-20 16:34:04,199 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 165 transitions, 1973 flow [2024-06-20 16:34:04,199 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 16:34:04,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:04,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:04,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:34:04,200 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 16:34:04,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:04,200 INFO L85 PathProgramCache]: Analyzing trace with hash 469229914, now seen corresponding path program 2 times [2024-06-20 16:34:04,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:04,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92004714] [2024-06-20 16:34:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:04,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:04,856 INFO 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 16:34:04,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:04,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92004714] [2024-06-20 16:34:04,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92004714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:04,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:04,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:04,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60485321] [2024-06-20 16:34:04,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:04,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:04,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:04,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:04,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:04,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:04,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 165 transitions, 1973 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 16:34:04,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:04,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:04,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:05,102 INFO L124 PetriNetUnfolderBase]: 379/672 cut-off events. [2024-06-20 16:34:05,102 INFO L125 PetriNetUnfolderBase]: For 27411/27411 co-relation queries the response was YES. [2024-06-20 16:34:05,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4740 conditions, 672 events. 379/672 cut-off events. For 27411/27411 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2862 event pairs, 54 based on Foata normal form. 2/672 useless extension candidates. Maximal degree in co-relation 4661. Up to 480 conditions per place. [2024-06-20 16:34:05,107 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 109 selfloop transitions, 65 changer transitions 0/176 dead transitions. [2024-06-20 16:34:05,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 176 transitions, 2355 flow [2024-06-20 16:34:05,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-20 16:34:05,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 16:34:05,109 INFO L175 Difference]: Start difference. First operand has 166 places, 165 transitions, 1973 flow. Second operand 8 states and 93 transitions. [2024-06-20 16:34:05,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 176 transitions, 2355 flow [2024-06-20 16:34:05,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 176 transitions, 2269 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:05,171 INFO L231 Difference]: Finished difference. Result has 169 places, 166 transitions, 2034 flow [2024-06-20 16:34:05,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2034, PETRI_PLACES=169, PETRI_TRANSITIONS=166} [2024-06-20 16:34:05,171 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2024-06-20 16:34:05,171 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 166 transitions, 2034 flow [2024-06-20 16:34:05,172 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 16:34:05,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:05,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:05,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:34:05,172 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:05,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:05,172 INFO L85 PathProgramCache]: Analyzing trace with hash 469226194, now seen corresponding path program 3 times [2024-06-20 16:34:05,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:05,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050327642] [2024-06-20 16:34:05,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:05,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:05,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:05,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050327642] [2024-06-20 16:34:05,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050327642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:05,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:05,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:05,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643266940] [2024-06-20 16:34:05,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:05,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:05,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:05,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:05,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:05,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:05,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 166 transitions, 2034 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 16:34:05,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:05,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:05,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:06,060 INFO L124 PetriNetUnfolderBase]: 390/693 cut-off events. [2024-06-20 16:34:06,061 INFO L125 PetriNetUnfolderBase]: For 30522/30522 co-relation queries the response was YES. [2024-06-20 16:34:06,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4967 conditions, 693 events. 390/693 cut-off events. For 30522/30522 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2991 event pairs, 53 based on Foata normal form. 2/693 useless extension candidates. Maximal degree in co-relation 4887. Up to 468 conditions per place. [2024-06-20 16:34:06,066 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 119 selfloop transitions, 59 changer transitions 0/180 dead transitions. [2024-06-20 16:34:06,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 180 transitions, 2518 flow [2024-06-20 16:34:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-20 16:34:06,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 16:34:06,068 INFO L175 Difference]: Start difference. First operand has 169 places, 166 transitions, 2034 flow. Second operand 8 states and 93 transitions. [2024-06-20 16:34:06,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 180 transitions, 2518 flow [2024-06-20 16:34:06,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 180 transitions, 2383 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:06,141 INFO L231 Difference]: Finished difference. Result has 171 places, 168 transitions, 2037 flow [2024-06-20 16:34:06,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2037, PETRI_PLACES=171, PETRI_TRANSITIONS=168} [2024-06-20 16:34:06,141 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2024-06-20 16:34:06,141 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 168 transitions, 2037 flow [2024-06-20 16:34:06,141 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 16:34:06,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:06,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:06,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:34:06,142 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:06,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:06,142 INFO L85 PathProgramCache]: Analyzing trace with hash 556071609, now seen corresponding path program 1 times [2024-06-20 16:34:06,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:06,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081685674] [2024-06-20 16:34:06,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:06,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:07,078 INFO 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 16:34:07,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:07,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081685674] [2024-06-20 16:34:07,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081685674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:07,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:07,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:07,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940613897] [2024-06-20 16:34:07,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:07,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:07,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:07,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:07,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:07,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:07,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 168 transitions, 2037 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 16:34:07,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:07,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:07,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:07,447 INFO L124 PetriNetUnfolderBase]: 393/698 cut-off events. [2024-06-20 16:34:07,447 INFO L125 PetriNetUnfolderBase]: For 31056/31056 co-relation queries the response was YES. [2024-06-20 16:34:07,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5002 conditions, 698 events. 393/698 cut-off events. For 31056/31056 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3017 event pairs, 50 based on Foata normal form. 1/697 useless extension candidates. Maximal degree in co-relation 4921. Up to 545 conditions per place. [2024-06-20 16:34:07,453 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 127 selfloop transitions, 53 changer transitions 0/182 dead transitions. [2024-06-20 16:34:07,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 182 transitions, 2451 flow [2024-06-20 16:34:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:07,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-20 16:34:07,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-20 16:34:07,454 INFO L175 Difference]: Start difference. First operand has 171 places, 168 transitions, 2037 flow. Second operand 9 states and 100 transitions. [2024-06-20 16:34:07,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 182 transitions, 2451 flow [2024-06-20 16:34:07,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 182 transitions, 2374 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 16:34:07,536 INFO L231 Difference]: Finished difference. Result has 178 places, 172 transitions, 2152 flow [2024-06-20 16:34:07,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2152, PETRI_PLACES=178, PETRI_TRANSITIONS=172} [2024-06-20 16:34:07,537 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-06-20 16:34:07,537 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 172 transitions, 2152 flow [2024-06-20 16:34:07,537 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 16:34:07,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:07,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:07,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:34:07,538 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:07,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:07,540 INFO L85 PathProgramCache]: Analyzing trace with hash 556065874, now seen corresponding path program 4 times [2024-06-20 16:34:07,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:07,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092310469] [2024-06-20 16:34:07,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:07,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:08,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:08,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092310469] [2024-06-20 16:34:08,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092310469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:08,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:08,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:08,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462797675] [2024-06-20 16:34:08,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:08,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:08,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:08,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:08,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:08,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:08,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 172 transitions, 2152 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 16:34:08,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:08,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:08,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:08,784 INFO L124 PetriNetUnfolderBase]: 390/693 cut-off events. [2024-06-20 16:34:08,785 INFO L125 PetriNetUnfolderBase]: For 31161/31161 co-relation queries the response was YES. [2024-06-20 16:34:08,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5094 conditions, 693 events. 390/693 cut-off events. For 31161/31161 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2993 event pairs, 56 based on Foata normal form. 2/693 useless extension candidates. Maximal degree in co-relation 5009. Up to 493 conditions per place. [2024-06-20 16:34:08,790 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 115 selfloop transitions, 66 changer transitions 0/183 dead transitions. [2024-06-20 16:34:08,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 183 transitions, 2540 flow [2024-06-20 16:34:08,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-20 16:34:08,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-20 16:34:08,791 INFO L175 Difference]: Start difference. First operand has 178 places, 172 transitions, 2152 flow. Second operand 9 states and 100 transitions. [2024-06-20 16:34:08,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 183 transitions, 2540 flow [2024-06-20 16:34:08,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 183 transitions, 2472 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:08,869 INFO L231 Difference]: Finished difference. Result has 182 places, 172 transitions, 2224 flow [2024-06-20 16:34:08,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2224, PETRI_PLACES=182, PETRI_TRANSITIONS=172} [2024-06-20 16:34:08,870 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2024-06-20 16:34:08,870 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 172 transitions, 2224 flow [2024-06-20 16:34:08,870 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 16:34:08,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:08,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:08,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:34:08,871 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:08,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:08,871 INFO L85 PathProgramCache]: Analyzing trace with hash -310820503, now seen corresponding path program 2 times [2024-06-20 16:34:08,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:08,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910910819] [2024-06-20 16:34:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:08,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:09,784 INFO 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 16:34:09,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:09,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910910819] [2024-06-20 16:34:09,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910910819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:09,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:09,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:09,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465158724] [2024-06-20 16:34:09,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:09,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:09,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:09,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:09,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:09,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:09,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 172 transitions, 2224 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 16:34:09,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:09,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:09,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:10,197 INFO L124 PetriNetUnfolderBase]: 388/690 cut-off events. [2024-06-20 16:34:10,198 INFO L125 PetriNetUnfolderBase]: For 30626/30626 co-relation queries the response was YES. [2024-06-20 16:34:10,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5117 conditions, 690 events. 388/690 cut-off events. For 30626/30626 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2978 event pairs, 57 based on Foata normal form. 1/689 useless extension candidates. Maximal degree in co-relation 5031. Up to 424 conditions per place. [2024-06-20 16:34:10,203 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 106 selfloop transitions, 76 changer transitions 0/184 dead transitions. [2024-06-20 16:34:10,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 184 transitions, 2708 flow [2024-06-20 16:34:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:34:10,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:34:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-20 16:34:10,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-20 16:34:10,205 INFO L175 Difference]: Start difference. First operand has 182 places, 172 transitions, 2224 flow. Second operand 10 states and 114 transitions. [2024-06-20 16:34:10,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 184 transitions, 2708 flow [2024-06-20 16:34:10,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 184 transitions, 2566 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:10,284 INFO L231 Difference]: Finished difference. Result has 184 places, 172 transitions, 2240 flow [2024-06-20 16:34:10,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2240, PETRI_PLACES=184, PETRI_TRANSITIONS=172} [2024-06-20 16:34:10,284 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2024-06-20 16:34:10,284 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 172 transitions, 2240 flow [2024-06-20 16:34:10,284 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 16:34:10,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:10,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:10,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:34:10,285 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:10,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:10,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1031909554, now seen corresponding path program 5 times [2024-06-20 16:34:10,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:10,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812817859] [2024-06-20 16:34:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:10,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:10,888 INFO 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 16:34:10,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:10,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812817859] [2024-06-20 16:34:10,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812817859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:10,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:10,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:10,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233859724] [2024-06-20 16:34:10,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:10,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:10,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:10,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:10,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:10,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:10,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 172 transitions, 2240 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 16:34:10,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:10,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:10,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:11,182 INFO L124 PetriNetUnfolderBase]: 392/698 cut-off events. [2024-06-20 16:34:11,183 INFO L125 PetriNetUnfolderBase]: For 33197/33197 co-relation queries the response was YES. [2024-06-20 16:34:11,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5181 conditions, 698 events. 392/698 cut-off events. For 33197/33197 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3050 event pairs, 29 based on Foata normal form. 2/698 useless extension candidates. Maximal degree in co-relation 5094. Up to 452 conditions per place. [2024-06-20 16:34:11,189 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 122 selfloop transitions, 64 changer transitions 0/188 dead transitions. [2024-06-20 16:34:11,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 188 transitions, 2758 flow [2024-06-20 16:34:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-20 16:34:11,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-20 16:34:11,191 INFO L175 Difference]: Start difference. First operand has 184 places, 172 transitions, 2240 flow. Second operand 8 states and 96 transitions. [2024-06-20 16:34:11,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 188 transitions, 2758 flow [2024-06-20 16:34:11,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 188 transitions, 2572 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 16:34:11,266 INFO L231 Difference]: Finished difference. Result has 183 places, 173 transitions, 2195 flow [2024-06-20 16:34:11,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2195, PETRI_PLACES=183, PETRI_TRANSITIONS=173} [2024-06-20 16:34:11,267 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-20 16:34:11,267 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 173 transitions, 2195 flow [2024-06-20 16:34:11,267 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 16:34:11,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:11,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:11,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:34:11,267 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:11,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:11,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1031905834, now seen corresponding path program 6 times [2024-06-20 16:34:11,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:11,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139546771] [2024-06-20 16:34:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:11,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:11,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:11,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139546771] [2024-06-20 16:34:11,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139546771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:11,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:11,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:11,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695892416] [2024-06-20 16:34:11,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:11,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:11,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:11,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:11,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:11,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:11,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 173 transitions, 2195 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 16:34:11,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:11,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:11,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:12,202 INFO L124 PetriNetUnfolderBase]: 389/693 cut-off events. [2024-06-20 16:34:12,202 INFO L125 PetriNetUnfolderBase]: For 32155/32155 co-relation queries the response was YES. [2024-06-20 16:34:12,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5053 conditions, 693 events. 389/693 cut-off events. For 32155/32155 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2999 event pairs, 49 based on Foata normal form. 2/693 useless extension candidates. Maximal degree in co-relation 4965. Up to 501 conditions per place. [2024-06-20 16:34:12,207 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 118 selfloop transitions, 66 changer transitions 0/186 dead transitions. [2024-06-20 16:34:12,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 186 transitions, 2602 flow [2024-06-20 16:34:12,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:12,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:12,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-20 16:34:12,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-20 16:34:12,223 INFO L175 Difference]: Start difference. First operand has 183 places, 173 transitions, 2195 flow. Second operand 8 states and 95 transitions. [2024-06-20 16:34:12,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 186 transitions, 2602 flow [2024-06-20 16:34:12,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 186 transitions, 2423 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:12,292 INFO L231 Difference]: Finished difference. Result has 184 places, 173 transitions, 2153 flow [2024-06-20 16:34:12,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2153, PETRI_PLACES=184, PETRI_TRANSITIONS=173} [2024-06-20 16:34:12,292 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2024-06-20 16:34:12,293 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 173 transitions, 2153 flow [2024-06-20 16:34:12,293 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 16:34:12,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:12,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:12,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:34:12,293 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:12,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:12,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1031755732, now seen corresponding path program 1 times [2024-06-20 16:34:12,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:12,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474411800] [2024-06-20 16:34:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:12,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:13,249 INFO 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 16:34:13,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:13,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474411800] [2024-06-20 16:34:13,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474411800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:13,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:13,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:13,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327608475] [2024-06-20 16:34:13,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:13,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:13,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:13,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:13,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:13,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:13,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 173 transitions, 2153 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 16:34:13,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:13,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:13,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:13,619 INFO L124 PetriNetUnfolderBase]: 401/713 cut-off events. [2024-06-20 16:34:13,619 INFO L125 PetriNetUnfolderBase]: For 35467/35467 co-relation queries the response was YES. [2024-06-20 16:34:13,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5072 conditions, 713 events. 401/713 cut-off events. For 35467/35467 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3106 event pairs, 51 based on Foata normal form. 4/715 useless extension candidates. Maximal degree in co-relation 4984. Up to 310 conditions per place. [2024-06-20 16:34:13,624 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 106 selfloop transitions, 87 changer transitions 0/195 dead transitions. [2024-06-20 16:34:13,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 195 transitions, 2846 flow [2024-06-20 16:34:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-20 16:34:13,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-20 16:34:13,626 INFO L175 Difference]: Start difference. First operand has 184 places, 173 transitions, 2153 flow. Second operand 9 states and 117 transitions. [2024-06-20 16:34:13,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 195 transitions, 2846 flow [2024-06-20 16:34:13,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 195 transitions, 2696 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:13,708 INFO L231 Difference]: Finished difference. Result has 186 places, 176 transitions, 2228 flow [2024-06-20 16:34:13,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2228, PETRI_PLACES=186, PETRI_TRANSITIONS=176} [2024-06-20 16:34:13,709 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2024-06-20 16:34:13,709 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 176 transitions, 2228 flow [2024-06-20 16:34:13,709 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 16:34:13,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:13,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:13,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:34:13,709 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:13,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:13,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1031755949, now seen corresponding path program 3 times [2024-06-20 16:34:13,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:13,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034334193] [2024-06-20 16:34:13,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:13,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:14,568 INFO 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 16:34:14,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:14,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034334193] [2024-06-20 16:34:14,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034334193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:14,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:14,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:14,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734128712] [2024-06-20 16:34:14,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:14,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:14,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:14,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:14,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:14,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 176 transitions, 2228 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 16:34:14,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:14,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:14,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:14,941 INFO L124 PetriNetUnfolderBase]: 404/718 cut-off events. [2024-06-20 16:34:14,941 INFO L125 PetriNetUnfolderBase]: For 32310/32310 co-relation queries the response was YES. [2024-06-20 16:34:14,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5171 conditions, 718 events. 404/718 cut-off events. For 32310/32310 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3146 event pairs, 52 based on Foata normal form. 1/717 useless extension candidates. Maximal degree in co-relation 5082. Up to 451 conditions per place. [2024-06-20 16:34:14,946 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 110 selfloop transitions, 80 changer transitions 0/192 dead transitions. [2024-06-20 16:34:14,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 192 transitions, 2771 flow [2024-06-20 16:34:14,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-20 16:34:14,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-20 16:34:14,948 INFO L175 Difference]: Start difference. First operand has 186 places, 176 transitions, 2228 flow. Second operand 9 states and 108 transitions. [2024-06-20 16:34:14,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 192 transitions, 2771 flow [2024-06-20 16:34:15,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 192 transitions, 2573 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:15,019 INFO L231 Difference]: Finished difference. Result has 188 places, 178 transitions, 2219 flow [2024-06-20 16:34:15,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2219, PETRI_PLACES=188, PETRI_TRANSITIONS=178} [2024-06-20 16:34:15,019 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2024-06-20 16:34:15,019 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 178 transitions, 2219 flow [2024-06-20 16:34:15,020 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 16:34:15,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:15,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:15,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:34:15,020 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:15,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1031761529, now seen corresponding path program 4 times [2024-06-20 16:34:15,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:15,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529425436] [2024-06-20 16:34:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:15,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:15,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:15,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529425436] [2024-06-20 16:34:15,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529425436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:15,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:15,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:15,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612794688] [2024-06-20 16:34:15,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:15,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:15,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:15,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:15,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:15,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:15,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 178 transitions, 2219 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 16:34:15,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:15,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:15,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:16,108 INFO L124 PetriNetUnfolderBase]: 407/723 cut-off events. [2024-06-20 16:34:16,108 INFO L125 PetriNetUnfolderBase]: For 33146/33146 co-relation queries the response was YES. [2024-06-20 16:34:16,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5156 conditions, 723 events. 407/723 cut-off events. For 33146/33146 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3160 event pairs, 45 based on Foata normal form. 1/722 useless extension candidates. Maximal degree in co-relation 5066. Up to 514 conditions per place. [2024-06-20 16:34:16,116 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 118 selfloop transitions, 75 changer transitions 0/195 dead transitions. [2024-06-20 16:34:16,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 195 transitions, 2776 flow [2024-06-20 16:34:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:16,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 102 transitions. [2024-06-20 16:34:16,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2024-06-20 16:34:16,118 INFO L175 Difference]: Start difference. First operand has 188 places, 178 transitions, 2219 flow. Second operand 8 states and 102 transitions. [2024-06-20 16:34:16,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 195 transitions, 2776 flow [2024-06-20 16:34:16,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 195 transitions, 2602 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:16,203 INFO L231 Difference]: Finished difference. Result has 189 places, 180 transitions, 2227 flow [2024-06-20 16:34:16,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2227, PETRI_PLACES=189, PETRI_TRANSITIONS=180} [2024-06-20 16:34:16,204 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2024-06-20 16:34:16,204 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 180 transitions, 2227 flow [2024-06-20 16:34:16,204 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 16:34:16,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:16,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:16,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:34:16,205 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:16,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:16,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1026191542, now seen corresponding path program 2 times [2024-06-20 16:34:16,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:16,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014157958] [2024-06-20 16:34:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:16,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:17,093 INFO 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 16:34:17,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:17,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014157958] [2024-06-20 16:34:17,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014157958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:17,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:17,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:17,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546623443] [2024-06-20 16:34:17,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:17,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:17,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:17,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:17,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:17,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:17,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 180 transitions, 2227 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 16:34:17,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:17,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:17,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:17,442 INFO L124 PetriNetUnfolderBase]: 433/765 cut-off events. [2024-06-20 16:34:17,442 INFO L125 PetriNetUnfolderBase]: For 41299/41299 co-relation queries the response was YES. [2024-06-20 16:34:17,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5641 conditions, 765 events. 433/765 cut-off events. For 41299/41299 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3381 event pairs, 59 based on Foata normal form. 2/765 useless extension candidates. Maximal degree in co-relation 5550. Up to 322 conditions per place. [2024-06-20 16:34:17,448 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 108 selfloop transitions, 94 changer transitions 0/204 dead transitions. [2024-06-20 16:34:17,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 204 transitions, 3093 flow [2024-06-20 16:34:17,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-20 16:34:17,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-20 16:34:17,450 INFO L175 Difference]: Start difference. First operand has 189 places, 180 transitions, 2227 flow. Second operand 9 states and 114 transitions. [2024-06-20 16:34:17,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 204 transitions, 3093 flow [2024-06-20 16:34:17,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 204 transitions, 2911 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:17,542 INFO L231 Difference]: Finished difference. Result has 192 places, 187 transitions, 2352 flow [2024-06-20 16:34:17,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2045, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2352, PETRI_PLACES=192, PETRI_TRANSITIONS=187} [2024-06-20 16:34:17,543 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 162 predicate places. [2024-06-20 16:34:17,543 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 187 transitions, 2352 flow [2024-06-20 16:34:17,543 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 16:34:17,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:17,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:17,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:34:17,544 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:17,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:17,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1026393569, now seen corresponding path program 5 times [2024-06-20 16:34:17,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:17,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116080493] [2024-06-20 16:34:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:17,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:18,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:18,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116080493] [2024-06-20 16:34:18,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116080493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:18,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:18,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:18,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410824399] [2024-06-20 16:34:18,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:18,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:18,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:18,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:18,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:18,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:18,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 187 transitions, 2352 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 16:34:18,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:18,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:18,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:18,757 INFO L124 PetriNetUnfolderBase]: 436/770 cut-off events. [2024-06-20 16:34:18,758 INFO L125 PetriNetUnfolderBase]: For 41458/41458 co-relation queries the response was YES. [2024-06-20 16:34:18,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5794 conditions, 770 events. 436/770 cut-off events. For 41458/41458 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3412 event pairs, 61 based on Foata normal form. 1/769 useless extension candidates. Maximal degree in co-relation 5702. Up to 501 conditions per place. [2024-06-20 16:34:18,764 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 117 selfloop transitions, 81 changer transitions 0/200 dead transitions. [2024-06-20 16:34:18,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 200 transitions, 2900 flow [2024-06-20 16:34:18,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-20 16:34:18,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36917562724014336 [2024-06-20 16:34:18,765 INFO L175 Difference]: Start difference. First operand has 192 places, 187 transitions, 2352 flow. Second operand 9 states and 103 transitions. [2024-06-20 16:34:18,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 200 transitions, 2900 flow [2024-06-20 16:34:18,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 200 transitions, 2814 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 16:34:18,861 INFO L231 Difference]: Finished difference. Result has 198 places, 189 transitions, 2455 flow [2024-06-20 16:34:18,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2455, PETRI_PLACES=198, PETRI_TRANSITIONS=189} [2024-06-20 16:34:18,861 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 168 predicate places. [2024-06-20 16:34:18,861 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 189 transitions, 2455 flow [2024-06-20 16:34:18,862 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 16:34:18,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:18,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:18,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:34:18,862 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:18,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:18,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1026393352, now seen corresponding path program 3 times [2024-06-20 16:34:18,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:18,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870262584] [2024-06-20 16:34:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:18,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:19,796 INFO 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 16:34:19,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:19,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870262584] [2024-06-20 16:34:19,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870262584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:19,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:19,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:19,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23537775] [2024-06-20 16:34:19,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:19,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:19,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:19,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:19,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:19,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:19,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 189 transitions, 2455 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 16:34:19,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:19,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:19,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:20,141 INFO L124 PetriNetUnfolderBase]: 432/764 cut-off events. [2024-06-20 16:34:20,142 INFO L125 PetriNetUnfolderBase]: For 40762/40762 co-relation queries the response was YES. [2024-06-20 16:34:20,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5740 conditions, 764 events. 432/764 cut-off events. For 40762/40762 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3395 event pairs, 55 based on Foata normal form. 2/764 useless extension candidates. Maximal degree in co-relation 5646. Up to 323 conditions per place. [2024-06-20 16:34:20,149 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 114 selfloop transitions, 89 changer transitions 0/205 dead transitions. [2024-06-20 16:34:20,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 205 transitions, 3117 flow [2024-06-20 16:34:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-20 16:34:20,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050179211469534 [2024-06-20 16:34:20,150 INFO L175 Difference]: Start difference. First operand has 198 places, 189 transitions, 2455 flow. Second operand 9 states and 113 transitions. [2024-06-20 16:34:20,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 205 transitions, 3117 flow [2024-06-20 16:34:20,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 205 transitions, 2999 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:20,248 INFO L231 Difference]: Finished difference. Result has 201 places, 189 transitions, 2520 flow [2024-06-20 16:34:20,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2520, PETRI_PLACES=201, PETRI_TRANSITIONS=189} [2024-06-20 16:34:20,249 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2024-06-20 16:34:20,249 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 189 transitions, 2520 flow [2024-06-20 16:34:20,249 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 16:34:20,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:20,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:20,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:34:20,250 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:20,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:20,250 INFO L85 PathProgramCache]: Analyzing trace with hash -159297570, now seen corresponding path program 4 times [2024-06-20 16:34:20,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:20,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509821923] [2024-06-20 16:34:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:20,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:21,251 INFO 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 16:34:21,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:21,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509821923] [2024-06-20 16:34:21,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509821923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:21,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:21,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:21,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411279154] [2024-06-20 16:34:21,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:21,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:21,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:21,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:21,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:21,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 189 transitions, 2520 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 16:34:21,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:21,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:21,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:21,699 INFO L124 PetriNetUnfolderBase]: 428/758 cut-off events. [2024-06-20 16:34:21,700 INFO L125 PetriNetUnfolderBase]: For 40236/40236 co-relation queries the response was YES. [2024-06-20 16:34:21,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5695 conditions, 758 events. 428/758 cut-off events. For 40236/40236 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3361 event pairs, 46 based on Foata normal form. 2/758 useless extension candidates. Maximal degree in co-relation 5600. Up to 506 conditions per place. [2024-06-20 16:34:21,733 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 139 selfloop transitions, 65 changer transitions 0/206 dead transitions. [2024-06-20 16:34:21,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 206 transitions, 3106 flow [2024-06-20 16:34:21,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:21,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:21,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-20 16:34:21,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835125448028674 [2024-06-20 16:34:21,740 INFO L175 Difference]: Start difference. First operand has 201 places, 189 transitions, 2520 flow. Second operand 9 states and 107 transitions. [2024-06-20 16:34:21,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 206 transitions, 3106 flow [2024-06-20 16:34:21,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 206 transitions, 2864 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:21,840 INFO L231 Difference]: Finished difference. Result has 204 places, 192 transitions, 2495 flow [2024-06-20 16:34:21,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2495, PETRI_PLACES=204, PETRI_TRANSITIONS=192} [2024-06-20 16:34:21,840 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2024-06-20 16:34:21,840 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 192 transitions, 2495 flow [2024-06-20 16:34:21,840 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 16:34:21,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:21,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:21,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:34:21,841 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:21,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:21,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1026191759, now seen corresponding path program 6 times [2024-06-20 16:34:21,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:21,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836798766] [2024-06-20 16:34:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:21,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:22,671 INFO 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 16:34:22,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:22,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836798766] [2024-06-20 16:34:22,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836798766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:22,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:22,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:22,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303320824] [2024-06-20 16:34:22,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:22,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:22,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:22,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:22,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:22,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:22,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 192 transitions, 2495 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 16:34:22,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:22,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:22,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:23,093 INFO L124 PetriNetUnfolderBase]: 431/763 cut-off events. [2024-06-20 16:34:23,093 INFO L125 PetriNetUnfolderBase]: For 39991/39991 co-relation queries the response was YES. [2024-06-20 16:34:23,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5720 conditions, 763 events. 431/763 cut-off events. For 39991/39991 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3388 event pairs, 50 based on Foata normal form. 1/762 useless extension candidates. Maximal degree in co-relation 5622. Up to 610 conditions per place. [2024-06-20 16:34:23,102 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 149 selfloop transitions, 53 changer transitions 0/204 dead transitions. [2024-06-20 16:34:23,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 204 transitions, 2947 flow [2024-06-20 16:34:23,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:23,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:23,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-20 16:34:23,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:34:23,103 INFO L175 Difference]: Start difference. First operand has 204 places, 192 transitions, 2495 flow. Second operand 9 states and 99 transitions. [2024-06-20 16:34:23,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 204 transitions, 2947 flow [2024-06-20 16:34:23,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 204 transitions, 2875 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:23,214 INFO L231 Difference]: Finished difference. Result has 208 places, 194 transitions, 2562 flow [2024-06-20 16:34:23,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2562, PETRI_PLACES=208, PETRI_TRANSITIONS=194} [2024-06-20 16:34:23,215 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-06-20 16:34:23,215 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 194 transitions, 2562 flow [2024-06-20 16:34:23,215 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 16:34:23,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:23,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:23,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:34:23,216 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:23,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:23,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1054867598, now seen corresponding path program 5 times [2024-06-20 16:34:23,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:23,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843436131] [2024-06-20 16:34:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:23,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:24,161 INFO 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 16:34:24,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:24,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843436131] [2024-06-20 16:34:24,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843436131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:24,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:24,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:24,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968697495] [2024-06-20 16:34:24,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:24,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:24,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:24,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:24,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:24,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:24,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 194 transitions, 2562 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 16:34:24,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:24,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:24,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:24,629 INFO L124 PetriNetUnfolderBase]: 442/781 cut-off events. [2024-06-20 16:34:24,629 INFO L125 PetriNetUnfolderBase]: For 44842/44842 co-relation queries the response was YES. [2024-06-20 16:34:24,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5928 conditions, 781 events. 442/781 cut-off events. For 44842/44842 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3471 event pairs, 66 based on Foata normal form. 2/781 useless extension candidates. Maximal degree in co-relation 5830. Up to 687 conditions per place. [2024-06-20 16:34:24,636 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 177 selfloop transitions, 31 changer transitions 0/210 dead transitions. [2024-06-20 16:34:24,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 210 transitions, 3190 flow [2024-06-20 16:34:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-20 16:34:24,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:34:24,637 INFO L175 Difference]: Start difference. First operand has 208 places, 194 transitions, 2562 flow. Second operand 9 states and 99 transitions. [2024-06-20 16:34:24,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 210 transitions, 3190 flow [2024-06-20 16:34:24,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 210 transitions, 3079 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:24,745 INFO L231 Difference]: Finished difference. Result has 210 places, 198 transitions, 2590 flow [2024-06-20 16:34:24,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2590, PETRI_PLACES=210, PETRI_TRANSITIONS=198} [2024-06-20 16:34:24,746 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 180 predicate places. [2024-06-20 16:34:24,746 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 198 transitions, 2590 flow [2024-06-20 16:34:24,746 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 16:34:24,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:24,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:24,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:34:24,747 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:24,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:24,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1118852269, now seen corresponding path program 7 times [2024-06-20 16:34:24,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:24,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101210208] [2024-06-20 16:34:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:24,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:25,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:25,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101210208] [2024-06-20 16:34:25,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101210208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:25,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:25,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:25,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299709840] [2024-06-20 16:34:25,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:25,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:25,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:25,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:25,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:25,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:25,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 198 transitions, 2590 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 16:34:25,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:25,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:25,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:26,025 INFO L124 PetriNetUnfolderBase]: 445/786 cut-off events. [2024-06-20 16:34:26,025 INFO L125 PetriNetUnfolderBase]: For 44728/44728 co-relation queries the response was YES. [2024-06-20 16:34:26,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5939 conditions, 786 events. 445/786 cut-off events. For 44728/44728 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3508 event pairs, 64 based on Foata normal form. 1/785 useless extension candidates. Maximal degree in co-relation 5840. Up to 748 conditions per place. [2024-06-20 16:34:26,032 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 185 selfloop transitions, 21 changer transitions 0/208 dead transitions. [2024-06-20 16:34:26,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 208 transitions, 3048 flow [2024-06-20 16:34:26,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-06-20 16:34:26,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32616487455197135 [2024-06-20 16:34:26,033 INFO L175 Difference]: Start difference. First operand has 210 places, 198 transitions, 2590 flow. Second operand 9 states and 91 transitions. [2024-06-20 16:34:26,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 208 transitions, 3048 flow [2024-06-20 16:34:26,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 208 transitions, 2994 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:26,139 INFO L231 Difference]: Finished difference. Result has 214 places, 200 transitions, 2615 flow [2024-06-20 16:34:26,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2615, PETRI_PLACES=214, PETRI_TRANSITIONS=200} [2024-06-20 16:34:26,139 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 184 predicate places. [2024-06-20 16:34:26,139 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 200 transitions, 2615 flow [2024-06-20 16:34:26,139 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 16:34:26,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:26,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:26,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:34:26,140 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:26,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:26,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1118650242, now seen corresponding path program 6 times [2024-06-20 16:34:26,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:26,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151253010] [2024-06-20 16:34:26,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:26,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:27,031 INFO 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 16:34:27,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:27,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151253010] [2024-06-20 16:34:27,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151253010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:27,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:27,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:27,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828356406] [2024-06-20 16:34:27,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:27,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:27,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:27,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:27,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:27,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:27,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 200 transitions, 2615 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 16:34:27,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:27,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:27,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:27,408 INFO L124 PetriNetUnfolderBase]: 461/812 cut-off events. [2024-06-20 16:34:27,408 INFO L125 PetriNetUnfolderBase]: For 51348/51348 co-relation queries the response was YES. [2024-06-20 16:34:27,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6269 conditions, 812 events. 461/812 cut-off events. For 51348/51348 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3654 event pairs, 66 based on Foata normal form. 2/812 useless extension candidates. Maximal degree in co-relation 6168. Up to 742 conditions per place. [2024-06-20 16:34:27,414 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 187 selfloop transitions, 27 changer transitions 0/216 dead transitions. [2024-06-20 16:34:27,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 216 transitions, 3267 flow [2024-06-20 16:34:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:27,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-20 16:34:27,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:34:27,415 INFO L175 Difference]: Start difference. First operand has 214 places, 200 transitions, 2615 flow. Second operand 9 states and 99 transitions. [2024-06-20 16:34:27,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 216 transitions, 3267 flow [2024-06-20 16:34:27,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 216 transitions, 3216 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:27,535 INFO L231 Difference]: Finished difference. Result has 216 places, 204 transitions, 2703 flow [2024-06-20 16:34:27,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2564, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2703, PETRI_PLACES=216, PETRI_TRANSITIONS=204} [2024-06-20 16:34:27,535 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2024-06-20 16:34:27,536 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 204 transitions, 2703 flow [2024-06-20 16:34:27,536 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 16:34:27,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:27,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:27,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:34:27,536 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:27,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:27,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1464528325, now seen corresponding path program 8 times [2024-06-20 16:34:27,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:27,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730973199] [2024-06-20 16:34:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:27,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:28,590 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 16:34:28,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:28,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730973199] [2024-06-20 16:34:28,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730973199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:28,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:28,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:28,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077511877] [2024-06-20 16:34:28,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:28,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:28,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:28,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:28,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:28,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:28,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 204 transitions, 2703 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 16:34:28,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:28,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:28,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:28,941 INFO L124 PetriNetUnfolderBase]: 464/817 cut-off events. [2024-06-20 16:34:28,941 INFO L125 PetriNetUnfolderBase]: For 51311/51311 co-relation queries the response was YES. [2024-06-20 16:34:28,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6358 conditions, 817 events. 464/817 cut-off events. For 51311/51311 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3663 event pairs, 68 based on Foata normal form. 1/816 useless extension candidates. Maximal degree in co-relation 6256. Up to 788 conditions per place. [2024-06-20 16:34:28,947 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 196 selfloop transitions, 16 changer transitions 0/214 dead transitions. [2024-06-20 16:34:28,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 214 transitions, 3177 flow [2024-06-20 16:34:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2024-06-20 16:34:28,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3154121863799283 [2024-06-20 16:34:28,949 INFO L175 Difference]: Start difference. First operand has 216 places, 204 transitions, 2703 flow. Second operand 9 states and 88 transitions. [2024-06-20 16:34:28,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 214 transitions, 3177 flow [2024-06-20 16:34:29,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 214 transitions, 3124 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:29,078 INFO L231 Difference]: Finished difference. Result has 220 places, 206 transitions, 2723 flow [2024-06-20 16:34:29,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2723, PETRI_PLACES=220, PETRI_TRANSITIONS=206} [2024-06-20 16:34:29,079 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 190 predicate places. [2024-06-20 16:34:29,079 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 206 transitions, 2723 flow [2024-06-20 16:34:29,079 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 16:34:29,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:29,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:29,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:34:29,079 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:29,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:29,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1118650459, now seen corresponding path program 9 times [2024-06-20 16:34:29,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:29,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178802660] [2024-06-20 16:34:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:29,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:29,949 INFO 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 16:34:29,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:29,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178802660] [2024-06-20 16:34:29,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178802660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:29,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:29,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:29,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85098049] [2024-06-20 16:34:29,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:29,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:29,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:29,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:29,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:30,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:30,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 206 transitions, 2723 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 16:34:30,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:30,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:30,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:30,342 INFO L124 PetriNetUnfolderBase]: 462/814 cut-off events. [2024-06-20 16:34:30,343 INFO L125 PetriNetUnfolderBase]: For 50877/50877 co-relation queries the response was YES. [2024-06-20 16:34:30,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6285 conditions, 814 events. 462/814 cut-off events. For 50877/50877 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3666 event pairs, 67 based on Foata normal form. 1/813 useless extension candidates. Maximal degree in co-relation 6181. Up to 776 conditions per place. [2024-06-20 16:34:30,349 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 191 selfloop transitions, 21 changer transitions 0/214 dead transitions. [2024-06-20 16:34:30,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 214 transitions, 3165 flow [2024-06-20 16:34:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-06-20 16:34:30,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32616487455197135 [2024-06-20 16:34:30,350 INFO L175 Difference]: Start difference. First operand has 220 places, 206 transitions, 2723 flow. Second operand 9 states and 91 transitions. [2024-06-20 16:34:30,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 214 transitions, 3165 flow [2024-06-20 16:34:30,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 214 transitions, 3116 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:30,499 INFO L231 Difference]: Finished difference. Result has 222 places, 206 transitions, 2721 flow [2024-06-20 16:34:30,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2674, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2721, PETRI_PLACES=222, PETRI_TRANSITIONS=206} [2024-06-20 16:34:30,499 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 192 predicate places. [2024-06-20 16:34:30,499 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 206 transitions, 2721 flow [2024-06-20 16:34:30,500 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 16:34:30,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:30,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:30,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:34:30,500 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:30,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:30,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1713879212, now seen corresponding path program 7 times [2024-06-20 16:34:30,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:30,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711887866] [2024-06-20 16:34:30,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:30,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:31,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:31,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711887866] [2024-06-20 16:34:31,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711887866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:31,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:31,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:31,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303905597] [2024-06-20 16:34:31,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:31,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:31,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:31,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:31,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:31,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:31,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 206 transitions, 2721 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 16:34:31,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:31,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:31,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:31,792 INFO L124 PetriNetUnfolderBase]: 468/824 cut-off events. [2024-06-20 16:34:31,793 INFO L125 PetriNetUnfolderBase]: For 54390/54390 co-relation queries the response was YES. [2024-06-20 16:34:31,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6385 conditions, 824 events. 468/824 cut-off events. For 54390/54390 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3737 event pairs, 65 based on Foata normal form. 2/824 useless extension candidates. Maximal degree in co-relation 6280. Up to 752 conditions per place. [2024-06-20 16:34:31,799 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 191 selfloop transitions, 27 changer transitions 0/220 dead transitions. [2024-06-20 16:34:31,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 220 transitions, 3351 flow [2024-06-20 16:34:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-20 16:34:31,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-20 16:34:31,800 INFO L175 Difference]: Start difference. First operand has 222 places, 206 transitions, 2721 flow. Second operand 9 states and 96 transitions. [2024-06-20 16:34:31,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 220 transitions, 3351 flow [2024-06-20 16:34:31,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 220 transitions, 3106 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-20 16:34:31,943 INFO L231 Difference]: Finished difference. Result has 220 places, 208 transitions, 2575 flow [2024-06-20 16:34:31,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2476, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2575, PETRI_PLACES=220, PETRI_TRANSITIONS=208} [2024-06-20 16:34:31,943 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 190 predicate places. [2024-06-20 16:34:31,943 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 208 transitions, 2575 flow [2024-06-20 16:34:31,943 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 16:34:31,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:31,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:31,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:34:31,944 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:31,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:31,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1713886652, now seen corresponding path program 8 times [2024-06-20 16:34:31,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:31,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587015060] [2024-06-20 16:34:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:31,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:32,808 INFO 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 16:34:32,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:32,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587015060] [2024-06-20 16:34:32,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587015060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:32,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:32,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:32,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890192897] [2024-06-20 16:34:32,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:32,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:32,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:32,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:32,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:32,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:32,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 208 transitions, 2575 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 16:34:32,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:32,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:32,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:33,231 INFO L124 PetriNetUnfolderBase]: 474/834 cut-off events. [2024-06-20 16:34:33,231 INFO L125 PetriNetUnfolderBase]: For 55498/55498 co-relation queries the response was YES. [2024-06-20 16:34:33,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6327 conditions, 834 events. 474/834 cut-off events. For 55498/55498 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3793 event pairs, 70 based on Foata normal form. 2/834 useless extension candidates. Maximal degree in co-relation 6222. Up to 758 conditions per place. [2024-06-20 16:34:33,239 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 193 selfloop transitions, 27 changer transitions 0/222 dead transitions. [2024-06-20 16:34:33,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 222 transitions, 3215 flow [2024-06-20 16:34:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-20 16:34:33,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-20 16:34:33,240 INFO L175 Difference]: Start difference. First operand has 220 places, 208 transitions, 2575 flow. Second operand 9 states and 97 transitions. [2024-06-20 16:34:33,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 222 transitions, 3215 flow [2024-06-20 16:34:33,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 222 transitions, 3077 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:33,368 INFO L231 Difference]: Finished difference. Result has 221 places, 210 transitions, 2540 flow [2024-06-20 16:34:33,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2540, PETRI_PLACES=221, PETRI_TRANSITIONS=210} [2024-06-20 16:34:33,368 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2024-06-20 16:34:33,369 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 210 transitions, 2540 flow [2024-06-20 16:34:33,369 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 16:34:33,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:33,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:33,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:34:33,369 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:33,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:33,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1457386142, now seen corresponding path program 9 times [2024-06-20 16:34:33,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:33,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273026694] [2024-06-20 16:34:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:33,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:34,261 INFO 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 16:34:34,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:34,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273026694] [2024-06-20 16:34:34,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273026694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:34,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:34,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:34,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116343723] [2024-06-20 16:34:34,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:34,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:34,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:34,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:34,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:34,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:34,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 210 transitions, 2540 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 16:34:34,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:34,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:34,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:34,692 INFO L124 PetriNetUnfolderBase]: 470/828 cut-off events. [2024-06-20 16:34:34,692 INFO L125 PetriNetUnfolderBase]: For 52559/52559 co-relation queries the response was YES. [2024-06-20 16:34:34,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6075 conditions, 828 events. 470/828 cut-off events. For 52559/52559 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3751 event pairs, 70 based on Foata normal form. 2/828 useless extension candidates. Maximal degree in co-relation 5970. Up to 761 conditions per place. [2024-06-20 16:34:34,699 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 190 selfloop transitions, 28 changer transitions 0/220 dead transitions. [2024-06-20 16:34:34,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 220 transitions, 3002 flow [2024-06-20 16:34:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:34,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-20 16:34:34,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-20 16:34:34,701 INFO L175 Difference]: Start difference. First operand has 221 places, 210 transitions, 2540 flow. Second operand 9 states and 96 transitions. [2024-06-20 16:34:34,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 220 transitions, 3002 flow [2024-06-20 16:34:34,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 220 transitions, 2927 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:34,816 INFO L231 Difference]: Finished difference. Result has 224 places, 210 transitions, 2526 flow [2024-06-20 16:34:34,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2465, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2526, PETRI_PLACES=224, PETRI_TRANSITIONS=210} [2024-06-20 16:34:34,816 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2024-06-20 16:34:34,816 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 210 transitions, 2526 flow [2024-06-20 16:34:34,817 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 16:34:34,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:34,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:34,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:34:34,817 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:34,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1723083422, now seen corresponding path program 10 times [2024-06-20 16:34:34,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:34,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775639621] [2024-06-20 16:34:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:34,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:35,586 INFO 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 16:34:35,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:35,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775639621] [2024-06-20 16:34:35,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775639621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:35,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:35,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:35,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751597329] [2024-06-20 16:34:35,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:35,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:35,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:35,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:35,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:35,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:35,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 210 transitions, 2526 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 16:34:35,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:35,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:35,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:35,916 INFO L124 PetriNetUnfolderBase]: 464/819 cut-off events. [2024-06-20 16:34:35,916 INFO L125 PetriNetUnfolderBase]: For 49923/49923 co-relation queries the response was YES. [2024-06-20 16:34:35,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5803 conditions, 819 events. 464/819 cut-off events. For 49923/49923 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3722 event pairs, 66 based on Foata normal form. 3/820 useless extension candidates. Maximal degree in co-relation 5697. Up to 773 conditions per place. [2024-06-20 16:34:35,924 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 197 selfloop transitions, 21 changer transitions 0/220 dead transitions. [2024-06-20 16:34:35,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 220 transitions, 2988 flow [2024-06-20 16:34:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-06-20 16:34:35,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32616487455197135 [2024-06-20 16:34:35,925 INFO L175 Difference]: Start difference. First operand has 224 places, 210 transitions, 2526 flow. Second operand 9 states and 91 transitions. [2024-06-20 16:34:35,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 220 transitions, 2988 flow [2024-06-20 16:34:36,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 220 transitions, 2883 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-20 16:34:36,042 INFO L231 Difference]: Finished difference. Result has 224 places, 210 transitions, 2471 flow [2024-06-20 16:34:36,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2421, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2471, PETRI_PLACES=224, PETRI_TRANSITIONS=210} [2024-06-20 16:34:36,043 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2024-06-20 16:34:36,043 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 210 transitions, 2471 flow [2024-06-20 16:34:36,043 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 16:34:36,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:36,043 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 16:34:36,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:34:36,044 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:36,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1603019189, now seen corresponding path program 1 times [2024-06-20 16:34:36,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:36,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353178414] [2024-06-20 16:34:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:36,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:36,842 INFO 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 16:34:36,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:36,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353178414] [2024-06-20 16:34:36,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353178414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:36,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:36,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:36,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674513620] [2024-06-20 16:34:36,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:36,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:36,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:36,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:36,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:36,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:36,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 210 transitions, 2471 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 16:34:36,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:36,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:36,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:37,178 INFO L124 PetriNetUnfolderBase]: 468/827 cut-off events. [2024-06-20 16:34:37,178 INFO L125 PetriNetUnfolderBase]: For 49170/49170 co-relation queries the response was YES. [2024-06-20 16:34:37,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5768 conditions, 827 events. 468/827 cut-off events. For 49170/49170 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3773 event pairs, 50 based on Foata normal form. 2/827 useless extension candidates. Maximal degree in co-relation 5662. Up to 382 conditions per place. [2024-06-20 16:34:37,186 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 161 selfloop transitions, 63 changer transitions 0/226 dead transitions. [2024-06-20 16:34:37,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 226 transitions, 3089 flow [2024-06-20 16:34:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-20 16:34:37,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-20 16:34:37,187 INFO L175 Difference]: Start difference. First operand has 224 places, 210 transitions, 2471 flow. Second operand 9 states and 98 transitions. [2024-06-20 16:34:37,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 226 transitions, 3089 flow [2024-06-20 16:34:37,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 226 transitions, 3025 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 16:34:37,306 INFO L231 Difference]: Finished difference. Result has 224 places, 211 transitions, 2543 flow [2024-06-20 16:34:37,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2407, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2543, PETRI_PLACES=224, PETRI_TRANSITIONS=211} [2024-06-20 16:34:37,307 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2024-06-20 16:34:37,307 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 211 transitions, 2543 flow [2024-06-20 16:34:37,307 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 16:34:37,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:37,307 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 16:34:37,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:34:37,308 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:37,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:37,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1661231609, now seen corresponding path program 2 times [2024-06-20 16:34:37,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:37,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656203924] [2024-06-20 16:34:37,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:37,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:38,107 INFO 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 16:34:38,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:38,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656203924] [2024-06-20 16:34:38,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656203924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:38,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:38,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:38,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564012303] [2024-06-20 16:34:38,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:38,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:38,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:38,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:38,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:38,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:38,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 211 transitions, 2543 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 16:34:38,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:38,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:38,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:38,495 INFO L124 PetriNetUnfolderBase]: 472/835 cut-off events. [2024-06-20 16:34:38,496 INFO L125 PetriNetUnfolderBase]: For 50759/50759 co-relation queries the response was YES. [2024-06-20 16:34:38,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5905 conditions, 835 events. 472/835 cut-off events. For 50759/50759 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3807 event pairs, 61 based on Foata normal form. 2/835 useless extension candidates. Maximal degree in co-relation 5798. Up to 558 conditions per place. [2024-06-20 16:34:38,504 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 134 selfloop transitions, 87 changer transitions 0/223 dead transitions. [2024-06-20 16:34:38,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 223 transitions, 3019 flow [2024-06-20 16:34:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-20 16:34:38,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-20 16:34:38,505 INFO L175 Difference]: Start difference. First operand has 224 places, 211 transitions, 2543 flow. Second operand 9 states and 106 transitions. [2024-06-20 16:34:38,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 223 transitions, 3019 flow [2024-06-20 16:34:38,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 223 transitions, 2917 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:38,632 INFO L231 Difference]: Finished difference. Result has 227 places, 212 transitions, 2629 flow [2024-06-20 16:34:38,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2629, PETRI_PLACES=227, PETRI_TRANSITIONS=212} [2024-06-20 16:34:38,633 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 197 predicate places. [2024-06-20 16:34:38,633 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 212 transitions, 2629 flow [2024-06-20 16:34:38,633 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 16:34:38,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:38,633 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 16:34:38,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:34:38,633 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:38,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:38,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1661226959, now seen corresponding path program 3 times [2024-06-20 16:34:38,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:38,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068514895] [2024-06-20 16:34:38,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:38,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:39,417 INFO 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 16:34:39,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:39,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068514895] [2024-06-20 16:34:39,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068514895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:39,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:39,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:39,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046234138] [2024-06-20 16:34:39,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:39,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:39,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:39,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:39,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:39,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:39,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 212 transitions, 2629 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 16:34:39,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:39,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:39,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:39,815 INFO L124 PetriNetUnfolderBase]: 476/843 cut-off events. [2024-06-20 16:34:39,816 INFO L125 PetriNetUnfolderBase]: For 52247/52247 co-relation queries the response was YES. [2024-06-20 16:34:39,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6054 conditions, 843 events. 476/843 cut-off events. For 52247/52247 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3865 event pairs, 63 based on Foata normal form. 2/843 useless extension candidates. Maximal degree in co-relation 5946. Up to 550 conditions per place. [2024-06-20 16:34:39,824 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 138 selfloop transitions, 85 changer transitions 0/225 dead transitions. [2024-06-20 16:34:39,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 225 transitions, 3110 flow [2024-06-20 16:34:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:39,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-20 16:34:39,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-20 16:34:39,825 INFO L175 Difference]: Start difference. First operand has 227 places, 212 transitions, 2629 flow. Second operand 9 states and 106 transitions. [2024-06-20 16:34:39,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 225 transitions, 3110 flow [2024-06-20 16:34:39,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 225 transitions, 2934 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:39,960 INFO L231 Difference]: Finished difference. Result has 229 places, 213 transitions, 2636 flow [2024-06-20 16:34:39,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2453, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2636, PETRI_PLACES=229, PETRI_TRANSITIONS=213} [2024-06-20 16:34:39,961 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 199 predicate places. [2024-06-20 16:34:39,961 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 213 transitions, 2636 flow [2024-06-20 16:34:39,961 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 16:34:39,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:39,961 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 16:34:39,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:34:39,962 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:39,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:39,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1661111639, now seen corresponding path program 4 times [2024-06-20 16:34:39,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:39,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100438764] [2024-06-20 16:34:39,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:39,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:40,711 INFO 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 16:34:40,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:40,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100438764] [2024-06-20 16:34:40,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100438764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:40,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:40,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:40,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964065573] [2024-06-20 16:34:40,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:40,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:40,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:40,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:40,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:40,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:40,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 213 transitions, 2636 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 16:34:40,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:40,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:40,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:41,091 INFO L124 PetriNetUnfolderBase]: 487/864 cut-off events. [2024-06-20 16:34:41,092 INFO L125 PetriNetUnfolderBase]: For 58492/58492 co-relation queries the response was YES. [2024-06-20 16:34:41,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6281 conditions, 864 events. 487/864 cut-off events. For 58492/58492 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4003 event pairs, 62 based on Foata normal form. 2/864 useless extension candidates. Maximal degree in co-relation 6172. Up to 518 conditions per place. [2024-06-20 16:34:41,100 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 149 selfloop transitions, 78 changer transitions 0/229 dead transitions. [2024-06-20 16:34:41,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 229 transitions, 3276 flow [2024-06-20 16:34:41,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:41,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:41,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-20 16:34:41,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-20 16:34:41,102 INFO L175 Difference]: Start difference. First operand has 229 places, 213 transitions, 2636 flow. Second operand 9 states and 105 transitions. [2024-06-20 16:34:41,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 229 transitions, 3276 flow [2024-06-20 16:34:41,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 229 transitions, 3104 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:41,253 INFO L231 Difference]: Finished difference. Result has 231 places, 215 transitions, 2644 flow [2024-06-20 16:34:41,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2464, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2644, PETRI_PLACES=231, PETRI_TRANSITIONS=215} [2024-06-20 16:34:41,254 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 201 predicate places. [2024-06-20 16:34:41,254 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 215 transitions, 2644 flow [2024-06-20 16:34:41,254 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 16:34:41,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:41,254 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 16:34:41,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:34:41,255 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:41,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:41,255 INFO L85 PathProgramCache]: Analyzing trace with hash 58358749, now seen corresponding path program 1 times [2024-06-20 16:34:41,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:41,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786872588] [2024-06-20 16:34:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:41,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:42,524 INFO 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 16:34:42,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:42,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786872588] [2024-06-20 16:34:42,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786872588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:42,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:42,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:42,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670320028] [2024-06-20 16:34:42,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:42,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:42,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:42,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:42,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:42,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:42,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 215 transitions, 2644 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 16:34:42,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:42,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:42,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:43,050 INFO L124 PetriNetUnfolderBase]: 493/874 cut-off events. [2024-06-20 16:34:43,050 INFO L125 PetriNetUnfolderBase]: For 60336/60336 co-relation queries the response was YES. [2024-06-20 16:34:43,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6344 conditions, 874 events. 493/874 cut-off events. For 60336/60336 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4084 event pairs, 58 based on Foata normal form. 2/874 useless extension candidates. Maximal degree in co-relation 6234. Up to 596 conditions per place. [2024-06-20 16:34:43,057 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 153 selfloop transitions, 76 changer transitions 0/231 dead transitions. [2024-06-20 16:34:43,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 231 transitions, 3158 flow [2024-06-20 16:34:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:34:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:34:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-20 16:34:43,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-20 16:34:43,058 INFO L175 Difference]: Start difference. First operand has 231 places, 215 transitions, 2644 flow. Second operand 10 states and 115 transitions. [2024-06-20 16:34:43,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 231 transitions, 3158 flow [2024-06-20 16:34:43,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 231 transitions, 3058 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:43,218 INFO L231 Difference]: Finished difference. Result has 236 places, 217 transitions, 2723 flow [2024-06-20 16:34:43,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2723, PETRI_PLACES=236, PETRI_TRANSITIONS=217} [2024-06-20 16:34:43,219 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 206 predicate places. [2024-06-20 16:34:43,219 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 217 transitions, 2723 flow [2024-06-20 16:34:43,219 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 16:34:43,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:43,219 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 16:34:43,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:34:43,219 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:43,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:43,220 INFO L85 PathProgramCache]: Analyzing trace with hash 58352239, now seen corresponding path program 2 times [2024-06-20 16:34:43,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:43,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344175883] [2024-06-20 16:34:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:43,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:44,370 INFO 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 16:34:44,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:44,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344175883] [2024-06-20 16:34:44,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344175883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:44,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:44,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:44,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521369055] [2024-06-20 16:34:44,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:44,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:44,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:44,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:44,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:44,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:44,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 217 transitions, 2723 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 16:34:44,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:44,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:44,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:44,842 INFO L124 PetriNetUnfolderBase]: 499/884 cut-off events. [2024-06-20 16:34:44,842 INFO L125 PetriNetUnfolderBase]: For 62053/62053 co-relation queries the response was YES. [2024-06-20 16:34:44,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6574 conditions, 884 events. 499/884 cut-off events. For 62053/62053 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4147 event pairs, 57 based on Foata normal form. 2/884 useless extension candidates. Maximal degree in co-relation 6462. Up to 597 conditions per place. [2024-06-20 16:34:44,849 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 153 selfloop transitions, 79 changer transitions 0/234 dead transitions. [2024-06-20 16:34:44,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 234 transitions, 3251 flow [2024-06-20 16:34:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:34:44,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:34:44,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-20 16:34:44,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-20 16:34:44,850 INFO L175 Difference]: Start difference. First operand has 236 places, 217 transitions, 2723 flow. Second operand 10 states and 117 transitions. [2024-06-20 16:34:44,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 234 transitions, 3251 flow [2024-06-20 16:34:45,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 234 transitions, 3159 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:45,032 INFO L231 Difference]: Finished difference. Result has 240 places, 219 transitions, 2820 flow [2024-06-20 16:34:45,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2631, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2820, PETRI_PLACES=240, PETRI_TRANSITIONS=219} [2024-06-20 16:34:45,033 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2024-06-20 16:34:45,033 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 219 transitions, 2820 flow [2024-06-20 16:34:45,033 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 16:34:45,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:45,033 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 16:34:45,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:34:45,033 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:45,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:45,034 INFO L85 PathProgramCache]: Analyzing trace with hash 58352053, now seen corresponding path program 5 times [2024-06-20 16:34:45,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:45,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134834800] [2024-06-20 16:34:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:45,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:46,055 INFO 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 16:34:46,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:46,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134834800] [2024-06-20 16:34:46,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134834800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:46,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:46,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:46,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601586383] [2024-06-20 16:34:46,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:46,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:46,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:46,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:46,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:46,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:46,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 219 transitions, 2820 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 16:34:46,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:46,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:46,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:46,519 INFO L124 PetriNetUnfolderBase]: 503/892 cut-off events. [2024-06-20 16:34:46,519 INFO L125 PetriNetUnfolderBase]: For 64378/64378 co-relation queries the response was YES. [2024-06-20 16:34:46,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6677 conditions, 892 events. 503/892 cut-off events. For 64378/64378 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4204 event pairs, 60 based on Foata normal form. 2/892 useless extension candidates. Maximal degree in co-relation 6564. Up to 733 conditions per place. [2024-06-20 16:34:46,526 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 176 selfloop transitions, 54 changer transitions 0/232 dead transitions. [2024-06-20 16:34:46,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 232 transitions, 3319 flow [2024-06-20 16:34:46,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:34:46,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:34:46,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-20 16:34:46,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-20 16:34:46,527 INFO L175 Difference]: Start difference. First operand has 240 places, 219 transitions, 2820 flow. Second operand 10 states and 108 transitions. [2024-06-20 16:34:46,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 232 transitions, 3319 flow [2024-06-20 16:34:46,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 232 transitions, 3154 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:46,707 INFO L231 Difference]: Finished difference. Result has 242 places, 220 transitions, 2780 flow [2024-06-20 16:34:46,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2780, PETRI_PLACES=242, PETRI_TRANSITIONS=220} [2024-06-20 16:34:46,708 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 212 predicate places. [2024-06-20 16:34:46,708 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 220 transitions, 2780 flow [2024-06-20 16:34:46,708 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 16:34:46,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:46,708 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 16:34:46,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:34:46,709 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:46,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:46,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1045499457, now seen corresponding path program 3 times [2024-06-20 16:34:46,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:46,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340505418] [2024-06-20 16:34:46,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:46,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:47,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:47,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340505418] [2024-06-20 16:34:47,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340505418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:47,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:47,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:47,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359490409] [2024-06-20 16:34:47,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:47,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:47,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:47,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:47,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:47,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:47,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 220 transitions, 2780 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 16:34:47,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:47,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:47,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:48,202 INFO L124 PetriNetUnfolderBase]: 499/886 cut-off events. [2024-06-20 16:34:48,203 INFO L125 PetriNetUnfolderBase]: For 60553/60553 co-relation queries the response was YES. [2024-06-20 16:34:48,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6446 conditions, 886 events. 499/886 cut-off events. For 60553/60553 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4165 event pairs, 56 based on Foata normal form. 2/886 useless extension candidates. Maximal degree in co-relation 6332. Up to 576 conditions per place. [2024-06-20 16:34:48,211 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 146 selfloop transitions, 86 changer transitions 0/234 dead transitions. [2024-06-20 16:34:48,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 234 transitions, 3284 flow [2024-06-20 16:34:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:48,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:48,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-20 16:34:48,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-20 16:34:48,212 INFO L175 Difference]: Start difference. First operand has 242 places, 220 transitions, 2780 flow. Second operand 9 states and 111 transitions. [2024-06-20 16:34:48,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 234 transitions, 3284 flow [2024-06-20 16:34:48,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 234 transitions, 3168 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:48,399 INFO L231 Difference]: Finished difference. Result has 243 places, 220 transitions, 2841 flow [2024-06-20 16:34:48,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2664, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2841, PETRI_PLACES=243, PETRI_TRANSITIONS=220} [2024-06-20 16:34:48,399 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 213 predicate places. [2024-06-20 16:34:48,399 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 220 transitions, 2841 flow [2024-06-20 16:34:48,400 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 16:34:48,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:48,400 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 16:34:48,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:34:48,400 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:48,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:48,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1919240323, now seen corresponding path program 6 times [2024-06-20 16:34:48,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:48,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188550394] [2024-06-20 16:34:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:48,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:49,263 INFO 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 16:34:49,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:49,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188550394] [2024-06-20 16:34:49,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188550394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:49,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:49,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:49,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335409006] [2024-06-20 16:34:49,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:49,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:49,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:49,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:49,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:49,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:49,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 220 transitions, 2841 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 16:34:49,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:49,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:49,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:49,653 INFO L124 PetriNetUnfolderBase]: 524/929 cut-off events. [2024-06-20 16:34:49,653 INFO L125 PetriNetUnfolderBase]: For 62492/62492 co-relation queries the response was YES. [2024-06-20 16:34:49,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6815 conditions, 929 events. 524/929 cut-off events. For 62492/62492 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4440 event pairs, 85 based on Foata normal form. 2/929 useless extension candidates. Maximal degree in co-relation 6700. Up to 809 conditions per place. [2024-06-20 16:34:49,661 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 196 selfloop transitions, 46 changer transitions 0/244 dead transitions. [2024-06-20 16:34:49,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 244 transitions, 3526 flow [2024-06-20 16:34:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:34:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:34:49,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-20 16:34:49,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-20 16:34:49,662 INFO L175 Difference]: Start difference. First operand has 243 places, 220 transitions, 2841 flow. Second operand 10 states and 106 transitions. [2024-06-20 16:34:49,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 244 transitions, 3526 flow [2024-06-20 16:34:49,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 244 transitions, 3292 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:49,842 INFO L231 Difference]: Finished difference. Result has 249 places, 234 transitions, 2957 flow [2024-06-20 16:34:49,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2625, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2957, PETRI_PLACES=249, PETRI_TRANSITIONS=234} [2024-06-20 16:34:49,842 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-20 16:34:49,842 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 234 transitions, 2957 flow [2024-06-20 16:34:49,843 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 16:34:49,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:49,843 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 16:34:49,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:34:49,843 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:49,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:49,843 INFO L85 PathProgramCache]: Analyzing trace with hash -745844245, now seen corresponding path program 7 times [2024-06-20 16:34:49,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:49,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384246712] [2024-06-20 16:34:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:49,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:50,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:50,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384246712] [2024-06-20 16:34:50,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384246712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:50,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:50,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:50,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688284912] [2024-06-20 16:34:50,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:50,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:50,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:50,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:50,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:50,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:50,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 234 transitions, 2957 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 16:34:50,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:50,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:50,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:51,173 INFO L124 PetriNetUnfolderBase]: 532/945 cut-off events. [2024-06-20 16:34:51,174 INFO L125 PetriNetUnfolderBase]: For 64033/64033 co-relation queries the response was YES. [2024-06-20 16:34:51,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6846 conditions, 945 events. 532/945 cut-off events. For 64033/64033 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4562 event pairs, 62 based on Foata normal form. 2/945 useless extension candidates. Maximal degree in co-relation 6726. Up to 717 conditions per place. [2024-06-20 16:34:51,182 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 171 selfloop transitions, 76 changer transitions 0/249 dead transitions. [2024-06-20 16:34:51,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 249 transitions, 3652 flow [2024-06-20 16:34:51,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:51,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-20 16:34:51,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-20 16:34:51,183 INFO L175 Difference]: Start difference. First operand has 249 places, 234 transitions, 2957 flow. Second operand 9 states and 105 transitions. [2024-06-20 16:34:51,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 249 transitions, 3652 flow [2024-06-20 16:34:51,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 249 transitions, 3594 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:51,381 INFO L231 Difference]: Finished difference. Result has 254 places, 236 transitions, 3093 flow [2024-06-20 16:34:51,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2899, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3093, PETRI_PLACES=254, PETRI_TRANSITIONS=236} [2024-06-20 16:34:51,382 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2024-06-20 16:34:51,382 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 236 transitions, 3093 flow [2024-06-20 16:34:51,382 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 16:34:51,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:51,382 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 16:34:51,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:34:51,382 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:51,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:51,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1924423589, now seen corresponding path program 8 times [2024-06-20 16:34:51,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:51,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58289667] [2024-06-20 16:34:51,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:51,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:52,141 INFO 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 16:34:52,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58289667] [2024-06-20 16:34:52,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58289667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:52,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:52,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:52,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508214551] [2024-06-20 16:34:52,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:52,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:52,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:52,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:52,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:52,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:52,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 236 transitions, 3093 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 16:34:52,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:52,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:52,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:52,580 INFO L124 PetriNetUnfolderBase]: 536/953 cut-off events. [2024-06-20 16:34:52,581 INFO L125 PetriNetUnfolderBase]: For 66077/66077 co-relation queries the response was YES. [2024-06-20 16:34:52,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7005 conditions, 953 events. 536/953 cut-off events. For 66077/66077 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4606 event pairs, 47 based on Foata normal form. 2/953 useless extension candidates. Maximal degree in co-relation 6884. Up to 567 conditions per place. [2024-06-20 16:34:52,590 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 159 selfloop transitions, 93 changer transitions 0/254 dead transitions. [2024-06-20 16:34:52,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 254 transitions, 3804 flow [2024-06-20 16:34:52,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:52,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:52,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-20 16:34:52,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-20 16:34:52,591 INFO L175 Difference]: Start difference. First operand has 254 places, 236 transitions, 3093 flow. Second operand 9 states and 108 transitions. [2024-06-20 16:34:52,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 254 transitions, 3804 flow [2024-06-20 16:34:52,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 254 transitions, 3630 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:52,803 INFO L231 Difference]: Finished difference. Result has 255 places, 237 transitions, 3120 flow [2024-06-20 16:34:52,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3120, PETRI_PLACES=255, PETRI_TRANSITIONS=237} [2024-06-20 16:34:52,803 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 225 predicate places. [2024-06-20 16:34:52,803 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 237 transitions, 3120 flow [2024-06-20 16:34:52,804 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 16:34:52,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:52,804 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 16:34:52,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:34:52,804 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:52,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:52,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1924308269, now seen corresponding path program 9 times [2024-06-20 16:34:52,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:52,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322352766] [2024-06-20 16:34:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:52,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:53,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:53,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322352766] [2024-06-20 16:34:53,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322352766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:53,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:53,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:53,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323228656] [2024-06-20 16:34:53,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:53,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:53,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:53,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:53,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:53,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:53,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 237 transitions, 3120 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 16:34:53,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:53,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:53,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:53,969 INFO L124 PetriNetUnfolderBase]: 547/974 cut-off events. [2024-06-20 16:34:53,969 INFO L125 PetriNetUnfolderBase]: For 73629/73629 co-relation queries the response was YES. [2024-06-20 16:34:53,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7270 conditions, 974 events. 547/974 cut-off events. For 73629/73629 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 4744 event pairs, 68 based on Foata normal form. 2/974 useless extension candidates. Maximal degree in co-relation 7149. Up to 661 conditions per place. [2024-06-20 16:34:53,978 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 154 selfloop transitions, 99 changer transitions 0/255 dead transitions. [2024-06-20 16:34:53,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 255 transitions, 3848 flow [2024-06-20 16:34:53,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-20 16:34:53,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-20 16:34:53,980 INFO L175 Difference]: Start difference. First operand has 255 places, 237 transitions, 3120 flow. Second operand 9 states and 109 transitions. [2024-06-20 16:34:53,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 255 transitions, 3848 flow [2024-06-20 16:34:54,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 255 transitions, 3572 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:54,236 INFO L231 Difference]: Finished difference. Result has 256 places, 239 transitions, 3074 flow [2024-06-20 16:34:54,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3074, PETRI_PLACES=256, PETRI_TRANSITIONS=239} [2024-06-20 16:34:54,236 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 226 predicate places. [2024-06-20 16:34:54,236 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 239 transitions, 3074 flow [2024-06-20 16:34:54,237 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 16:34:54,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:54,237 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 16:34:54,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:34:54,237 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:54,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:54,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1924303619, now seen corresponding path program 10 times [2024-06-20 16:34:54,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:54,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988811371] [2024-06-20 16:34:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:54,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:55,046 INFO 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 16:34:55,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:55,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988811371] [2024-06-20 16:34:55,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988811371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:55,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:55,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:55,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705296734] [2024-06-20 16:34:55,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:55,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:55,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:55,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:55,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:55,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:55,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 239 transitions, 3074 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 16:34:55,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:55,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:55,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:55,454 INFO L124 PetriNetUnfolderBase]: 544/969 cut-off events. [2024-06-20 16:34:55,454 INFO L125 PetriNetUnfolderBase]: For 69419/69419 co-relation queries the response was YES. [2024-06-20 16:34:55,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6940 conditions, 969 events. 544/969 cut-off events. For 69419/69419 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 4734 event pairs, 71 based on Foata normal form. 2/969 useless extension candidates. Maximal degree in co-relation 6819. Up to 675 conditions per place. [2024-06-20 16:34:55,463 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 150 selfloop transitions, 101 changer transitions 0/253 dead transitions. [2024-06-20 16:34:55,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 253 transitions, 3616 flow [2024-06-20 16:34:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-20 16:34:55,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835125448028674 [2024-06-20 16:34:55,465 INFO L175 Difference]: Start difference. First operand has 256 places, 239 transitions, 3074 flow. Second operand 9 states and 107 transitions. [2024-06-20 16:34:55,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 253 transitions, 3616 flow [2024-06-20 16:34:55,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 253 transitions, 3472 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:55,690 INFO L231 Difference]: Finished difference. Result has 260 places, 239 transitions, 3136 flow [2024-06-20 16:34:55,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3136, PETRI_PLACES=260, PETRI_TRANSITIONS=239} [2024-06-20 16:34:55,690 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 230 predicate places. [2024-06-20 16:34:55,690 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 239 transitions, 3136 flow [2024-06-20 16:34:55,690 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 16:34:55,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:55,690 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 16:34:55,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:34:55,691 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:55,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:55,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1753421513, now seen corresponding path program 4 times [2024-06-20 16:34:55,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:55,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128970793] [2024-06-20 16:34:55,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:55,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:56,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:56,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128970793] [2024-06-20 16:34:56,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128970793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:56,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:56,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:56,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637135928] [2024-06-20 16:34:56,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:56,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:56,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:56,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:56,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:57,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:57,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 239 transitions, 3136 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 16:34:57,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:57,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:57,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:57,432 INFO L124 PetriNetUnfolderBase]: 550/979 cut-off events. [2024-06-20 16:34:57,432 INFO L125 PetriNetUnfolderBase]: For 71094/71094 co-relation queries the response was YES. [2024-06-20 16:34:57,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7134 conditions, 979 events. 550/979 cut-off events. For 71094/71094 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4786 event pairs, 61 based on Foata normal form. 2/979 useless extension candidates. Maximal degree in co-relation 7011. Up to 684 conditions per place. [2024-06-20 16:34:57,442 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 174 selfloop transitions, 81 changer transitions 0/257 dead transitions. [2024-06-20 16:34:57,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 257 transitions, 3716 flow [2024-06-20 16:34:57,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:34:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:34:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-20 16:34:57,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-20 16:34:57,443 INFO L175 Difference]: Start difference. First operand has 260 places, 239 transitions, 3136 flow. Second operand 10 states and 118 transitions. [2024-06-20 16:34:57,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 257 transitions, 3716 flow [2024-06-20 16:34:57,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 257 transitions, 3511 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:57,710 INFO L231 Difference]: Finished difference. Result has 262 places, 241 transitions, 3126 flow [2024-06-20 16:34:57,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2931, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3126, PETRI_PLACES=262, PETRI_TRANSITIONS=241} [2024-06-20 16:34:57,710 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 232 predicate places. [2024-06-20 16:34:57,710 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 241 transitions, 3126 flow [2024-06-20 16:34:57,711 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 16:34:57,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:57,711 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 16:34:57,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:34:57,711 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:57,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:57,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1753428209, now seen corresponding path program 11 times [2024-06-20 16:34:57,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:57,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578983103] [2024-06-20 16:34:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:57,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:58,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:58,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578983103] [2024-06-20 16:34:58,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578983103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:58,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:58,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:58,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515035863] [2024-06-20 16:34:58,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:58,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:58,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:58,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:58,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:58,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:58,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 241 transitions, 3126 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 16:34:58,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:58,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:58,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:59,029 INFO L124 PetriNetUnfolderBase]: 554/987 cut-off events. [2024-06-20 16:34:59,029 INFO L125 PetriNetUnfolderBase]: For 73008/73008 co-relation queries the response was YES. [2024-06-20 16:34:59,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7185 conditions, 987 events. 554/987 cut-off events. For 73008/73008 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4838 event pairs, 65 based on Foata normal form. 2/987 useless extension candidates. Maximal degree in co-relation 7061. Up to 819 conditions per place. [2024-06-20 16:34:59,040 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 191 selfloop transitions, 61 changer transitions 0/254 dead transitions. [2024-06-20 16:34:59,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 254 transitions, 3669 flow [2024-06-20 16:34:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:34:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:34:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-20 16:34:59,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-20 16:34:59,041 INFO L175 Difference]: Start difference. First operand has 262 places, 241 transitions, 3126 flow. Second operand 10 states and 108 transitions. [2024-06-20 16:34:59,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 254 transitions, 3669 flow [2024-06-20 16:34:59,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 254 transitions, 3524 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:59,295 INFO L231 Difference]: Finished difference. Result has 265 places, 242 transitions, 3120 flow [2024-06-20 16:34:59,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2981, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3120, PETRI_PLACES=265, PETRI_TRANSITIONS=242} [2024-06-20 16:34:59,295 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2024-06-20 16:34:59,295 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 242 transitions, 3120 flow [2024-06-20 16:34:59,295 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 16:34:59,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:59,296 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 16:34:59,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:34:59,296 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:59,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:59,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1919834783, now seen corresponding path program 5 times [2024-06-20 16:34:59,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:59,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120853291] [2024-06-20 16:34:59,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:59,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:00,387 INFO 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 16:35:00,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:00,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120853291] [2024-06-20 16:35:00,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120853291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:00,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:00,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:35:00,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025296704] [2024-06-20 16:35:00,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:00,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:35:00,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:00,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:35:00,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:35:00,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:00,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 242 transitions, 3120 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 16:35:00,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:00,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:00,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:00,851 INFO L124 PetriNetUnfolderBase]: 560/997 cut-off events. [2024-06-20 16:35:00,851 INFO L125 PetriNetUnfolderBase]: For 74617/74617 co-relation queries the response was YES. [2024-06-20 16:35:00,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7210 conditions, 997 events. 560/997 cut-off events. For 74617/74617 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4923 event pairs, 53 based on Foata normal form. 2/997 useless extension candidates. Maximal degree in co-relation 7085. Up to 571 conditions per place. [2024-06-20 16:35:00,861 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 147 selfloop transitions, 115 changer transitions 0/264 dead transitions. [2024-06-20 16:35:00,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 264 transitions, 3894 flow [2024-06-20 16:35:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:35:00,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:35:00,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-20 16:35:00,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265232974910394 [2024-06-20 16:35:00,862 INFO L175 Difference]: Start difference. First operand has 265 places, 242 transitions, 3120 flow. Second operand 9 states and 119 transitions. [2024-06-20 16:35:00,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 264 transitions, 3894 flow [2024-06-20 16:35:01,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 264 transitions, 3790 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 16:35:01,115 INFO L231 Difference]: Finished difference. Result has 267 places, 244 transitions, 3279 flow [2024-06-20 16:35:01,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3279, PETRI_PLACES=267, PETRI_TRANSITIONS=244} [2024-06-20 16:35:01,116 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 237 predicate places. [2024-06-20 16:35:01,116 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 244 transitions, 3279 flow [2024-06-20 16:35:01,116 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 16:35:01,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:01,116 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 16:35:01,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:35:01,117 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:01,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:01,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1747165403, now seen corresponding path program 6 times [2024-06-20 16:35:01,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:01,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340482157] [2024-06-20 16:35:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:01,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:02,500 INFO 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 16:35:02,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:02,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340482157] [2024-06-20 16:35:02,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340482157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:02,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:02,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:02,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988927452] [2024-06-20 16:35:02,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:02,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:02,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:02,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:02,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:02,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:02,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 244 transitions, 3279 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 16:35:02,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:02,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:02,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:03,100 INFO L124 PetriNetUnfolderBase]: 566/1007 cut-off events. [2024-06-20 16:35:03,100 INFO L125 PetriNetUnfolderBase]: For 76722/76722 co-relation queries the response was YES. [2024-06-20 16:35:03,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7450 conditions, 1007 events. 566/1007 cut-off events. For 76722/76722 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4960 event pairs, 62 based on Foata normal form. 2/1007 useless extension candidates. Maximal degree in co-relation 7324. Up to 712 conditions per place. [2024-06-20 16:35:03,110 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 177 selfloop transitions, 83 changer transitions 0/262 dead transitions. [2024-06-20 16:35:03,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 262 transitions, 3877 flow [2024-06-20 16:35:03,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:03,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-20 16:35:03,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-20 16:35:03,112 INFO L175 Difference]: Start difference. First operand has 267 places, 244 transitions, 3279 flow. Second operand 10 states and 117 transitions. [2024-06-20 16:35:03,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 262 transitions, 3877 flow [2024-06-20 16:35:03,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 262 transitions, 3485 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-20 16:35:03,409 INFO L231 Difference]: Finished difference. Result has 268 places, 246 transitions, 3094 flow [2024-06-20 16:35:03,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2895, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3094, PETRI_PLACES=268, PETRI_TRANSITIONS=246} [2024-06-20 16:35:03,410 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-06-20 16:35:03,410 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 246 transitions, 3094 flow [2024-06-20 16:35:03,410 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 16:35:03,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:03,411 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 16:35:03,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:35:03,411 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:03,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:03,411 INFO L85 PathProgramCache]: Analyzing trace with hash -816160903, now seen corresponding path program 12 times [2024-06-20 16:35:03,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:03,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670876432] [2024-06-20 16:35:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:03,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:04,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:04,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670876432] [2024-06-20 16:35:04,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670876432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:04,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:04,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:35:04,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418155421] [2024-06-20 16:35:04,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:04,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:35:04,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:35:04,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:35:04,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:04,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 246 transitions, 3094 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 16:35:04,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:04,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:04,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:04,716 INFO L124 PetriNetUnfolderBase]: 606/1083 cut-off events. [2024-06-20 16:35:04,716 INFO L125 PetriNetUnfolderBase]: For 84766/84766 co-relation queries the response was YES. [2024-06-20 16:35:04,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7735 conditions, 1083 events. 606/1083 cut-off events. For 84766/84766 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5505 event pairs, 104 based on Foata normal form. 2/1083 useless extension candidates. Maximal degree in co-relation 7609. Up to 890 conditions per place. [2024-06-20 16:35:04,728 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 206 selfloop transitions, 67 changer transitions 0/275 dead transitions. [2024-06-20 16:35:04,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 275 transitions, 3962 flow [2024-06-20 16:35:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:04,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-20 16:35:04,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-20 16:35:04,729 INFO L175 Difference]: Start difference. First operand has 268 places, 246 transitions, 3094 flow. Second operand 10 states and 114 transitions. [2024-06-20 16:35:04,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 275 transitions, 3962 flow [2024-06-20 16:35:05,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 275 transitions, 3810 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 16:35:05,082 INFO L231 Difference]: Finished difference. Result has 273 places, 260 transitions, 3266 flow [2024-06-20 16:35:05,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3266, PETRI_PLACES=273, PETRI_TRANSITIONS=260} [2024-06-20 16:35:05,082 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 243 predicate places. [2024-06-20 16:35:05,083 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 260 transitions, 3266 flow [2024-06-20 16:35:05,083 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 16:35:05,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:05,083 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 16:35:05,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:35:05,084 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:05,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:05,084 INFO L85 PathProgramCache]: Analyzing trace with hash -643493197, now seen corresponding path program 7 times [2024-06-20 16:35:05,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:05,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403816724] [2024-06-20 16:35:05,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:05,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:06,283 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 16:35:06,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:06,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403816724] [2024-06-20 16:35:06,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403816724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:06,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:06,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:06,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328647387] [2024-06-20 16:35:06,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:06,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:06,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:06,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:06,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:06,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:06,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 260 transitions, 3266 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 16:35:06,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:06,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:06,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:06,847 INFO L124 PetriNetUnfolderBase]: 622/1109 cut-off events. [2024-06-20 16:35:06,847 INFO L125 PetriNetUnfolderBase]: For 93768/93768 co-relation queries the response was YES. [2024-06-20 16:35:06,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8126 conditions, 1109 events. 622/1109 cut-off events. For 93768/93768 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5635 event pairs, 64 based on Foata normal form. 2/1109 useless extension candidates. Maximal degree in co-relation 7997. Up to 789 conditions per place. [2024-06-20 16:35:06,859 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 190 selfloop transitions, 89 changer transitions 0/281 dead transitions. [2024-06-20 16:35:06,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 281 transitions, 4094 flow [2024-06-20 16:35:06,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-20 16:35:06,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-20 16:35:06,860 INFO L175 Difference]: Start difference. First operand has 273 places, 260 transitions, 3266 flow. Second operand 10 states and 119 transitions. [2024-06-20 16:35:06,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 281 transitions, 4094 flow [2024-06-20 16:35:07,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 281 transitions, 4071 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 16:35:07,205 INFO L231 Difference]: Finished difference. Result has 280 places, 264 transitions, 3487 flow [2024-06-20 16:35:07,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3243, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3487, PETRI_PLACES=280, PETRI_TRANSITIONS=264} [2024-06-20 16:35:07,206 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 250 predicate places. [2024-06-20 16:35:07,206 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 264 transitions, 3487 flow [2024-06-20 16:35:07,206 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 16:35:07,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:07,206 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 16:35:07,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:35:07,206 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:07,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:07,207 INFO L85 PathProgramCache]: Analyzing trace with hash -816156253, now seen corresponding path program 13 times [2024-06-20 16:35:07,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:07,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937681952] [2024-06-20 16:35:07,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:07,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:08,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:08,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937681952] [2024-06-20 16:35:08,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937681952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:08,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:08,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:35:08,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391498116] [2024-06-20 16:35:08,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:08,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:35:08,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:08,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:35:08,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:35:08,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:08,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 264 transitions, 3487 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 16:35:08,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:08,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:08,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:08,666 INFO L124 PetriNetUnfolderBase]: 626/1117 cut-off events. [2024-06-20 16:35:08,666 INFO L125 PetriNetUnfolderBase]: For 96603/96603 co-relation queries the response was YES. [2024-06-20 16:35:08,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8409 conditions, 1117 events. 626/1117 cut-off events. For 96603/96603 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 5699 event pairs, 113 based on Foata normal form. 2/1117 useless extension candidates. Maximal degree in co-relation 8278. Up to 973 conditions per place. [2024-06-20 16:35:08,678 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 212 selfloop transitions, 63 changer transitions 0/277 dead transitions. [2024-06-20 16:35:08,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 277 transitions, 4083 flow [2024-06-20 16:35:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:35:08,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:35:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-20 16:35:08,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3727598566308244 [2024-06-20 16:35:08,680 INFO L175 Difference]: Start difference. First operand has 280 places, 264 transitions, 3487 flow. Second operand 9 states and 104 transitions. [2024-06-20 16:35:08,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 277 transitions, 4083 flow [2024-06-20 16:35:09,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 277 transitions, 3961 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 16:35:09,038 INFO L231 Difference]: Finished difference. Result has 283 places, 265 transitions, 3511 flow [2024-06-20 16:35:09,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3511, PETRI_PLACES=283, PETRI_TRANSITIONS=265} [2024-06-20 16:35:09,039 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 253 predicate places. [2024-06-20 16:35:09,039 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 265 transitions, 3511 flow [2024-06-20 16:35:09,039 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 16:35:09,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:09,039 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 16:35:09,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:35:09,040 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:09,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:09,040 INFO L85 PathProgramCache]: Analyzing trace with hash -815983273, now seen corresponding path program 14 times [2024-06-20 16:35:09,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:09,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866167959] [2024-06-20 16:35:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:09,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:10,228 INFO 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 16:35:10,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:10,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866167959] [2024-06-20 16:35:10,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866167959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:10,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:10,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:10,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570630290] [2024-06-20 16:35:10,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:10,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:10,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:10,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:10,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:10,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:10,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 265 transitions, 3511 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 16:35:10,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:10,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:10,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:10,771 INFO L124 PetriNetUnfolderBase]: 634/1135 cut-off events. [2024-06-20 16:35:10,771 INFO L125 PetriNetUnfolderBase]: For 105716/105716 co-relation queries the response was YES. [2024-06-20 16:35:10,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8577 conditions, 1135 events. 634/1135 cut-off events. For 105716/105716 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5841 event pairs, 77 based on Foata normal form. 4/1137 useless extension candidates. Maximal degree in co-relation 8444. Up to 958 conditions per place. [2024-06-20 16:35:10,783 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 207 selfloop transitions, 73 changer transitions 0/282 dead transitions. [2024-06-20 16:35:10,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 282 transitions, 4144 flow [2024-06-20 16:35:10,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:10,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-20 16:35:10,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-20 16:35:10,794 INFO L175 Difference]: Start difference. First operand has 283 places, 265 transitions, 3511 flow. Second operand 10 states and 111 transitions. [2024-06-20 16:35:10,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 282 transitions, 4144 flow [2024-06-20 16:35:11,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 282 transitions, 4014 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:35:11,207 INFO L231 Difference]: Finished difference. Result has 287 places, 267 transitions, 3568 flow [2024-06-20 16:35:11,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3381, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3568, PETRI_PLACES=287, PETRI_TRANSITIONS=267} [2024-06-20 16:35:11,207 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 257 predicate places. [2024-06-20 16:35:11,207 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 267 transitions, 3568 flow [2024-06-20 16:35:11,208 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 16:35:11,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:11,208 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 16:35:11,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:35:11,208 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:11,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash -815983087, now seen corresponding path program 8 times [2024-06-20 16:35:11,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:11,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149326011] [2024-06-20 16:35:11,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:11,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:12,397 INFO 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 16:35:12,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:12,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149326011] [2024-06-20 16:35:12,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149326011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:12,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:12,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:12,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041990785] [2024-06-20 16:35:12,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:12,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:12,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:12,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:12,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:12,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:12,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 267 transitions, 3568 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 16:35:12,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:12,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:12,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:12,987 INFO L124 PetriNetUnfolderBase]: 650/1161 cut-off events. [2024-06-20 16:35:12,987 INFO L125 PetriNetUnfolderBase]: For 108242/108242 co-relation queries the response was YES. [2024-06-20 16:35:12,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8978 conditions, 1161 events. 650/1161 cut-off events. For 108242/108242 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5982 event pairs, 64 based on Foata normal form. 2/1161 useless extension candidates. Maximal degree in co-relation 8844. Up to 847 conditions per place. [2024-06-20 16:35:12,998 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 191 selfloop transitions, 98 changer transitions 0/291 dead transitions. [2024-06-20 16:35:12,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 291 transitions, 4444 flow [2024-06-20 16:35:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:12,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:12,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-20 16:35:13,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-20 16:35:13,000 INFO L175 Difference]: Start difference. First operand has 287 places, 267 transitions, 3568 flow. Second operand 10 states and 123 transitions. [2024-06-20 16:35:13,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 291 transitions, 4444 flow [2024-06-20 16:35:13,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 291 transitions, 4159 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-20 16:35:13,408 INFO L231 Difference]: Finished difference. Result has 286 places, 271 transitions, 3553 flow [2024-06-20 16:35:13,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3553, PETRI_PLACES=286, PETRI_TRANSITIONS=271} [2024-06-20 16:35:13,408 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2024-06-20 16:35:13,408 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 271 transitions, 3553 flow [2024-06-20 16:35:13,409 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 16:35:13,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:13,409 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 16:35:13,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:35:13,409 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:13,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:13,409 INFO L85 PathProgramCache]: Analyzing trace with hash -815976577, now seen corresponding path program 9 times [2024-06-20 16:35:13,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:13,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868489120] [2024-06-20 16:35:13,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:13,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:14,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:14,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868489120] [2024-06-20 16:35:14,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868489120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:14,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:14,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:14,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977225518] [2024-06-20 16:35:14,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:14,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:14,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:14,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:14,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 271 transitions, 3553 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 16:35:14,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:14,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:14,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:15,177 INFO L124 PetriNetUnfolderBase]: 646/1155 cut-off events. [2024-06-20 16:35:15,177 INFO L125 PetriNetUnfolderBase]: For 102766/102766 co-relation queries the response was YES. [2024-06-20 16:35:15,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8763 conditions, 1155 events. 646/1155 cut-off events. For 102766/102766 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5964 event pairs, 64 based on Foata normal form. 2/1155 useless extension candidates. Maximal degree in co-relation 8628. Up to 858 conditions per place. [2024-06-20 16:35:15,188 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 193 selfloop transitions, 94 changer transitions 0/289 dead transitions. [2024-06-20 16:35:15,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 289 transitions, 4183 flow [2024-06-20 16:35:15,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:15,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-20 16:35:15,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-20 16:35:15,189 INFO L175 Difference]: Start difference. First operand has 286 places, 271 transitions, 3553 flow. Second operand 10 states and 119 transitions. [2024-06-20 16:35:15,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 289 transitions, 4183 flow [2024-06-20 16:35:15,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 289 transitions, 3913 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 16:35:15,629 INFO L231 Difference]: Finished difference. Result has 289 places, 271 transitions, 3476 flow [2024-06-20 16:35:15,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3476, PETRI_PLACES=289, PETRI_TRANSITIONS=271} [2024-06-20 16:35:15,629 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 259 predicate places. [2024-06-20 16:35:15,629 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 271 transitions, 3476 flow [2024-06-20 16:35:15,630 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 16:35:15,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:15,630 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 16:35:15,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:35:15,630 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:15,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:15,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2106624819, now seen corresponding path program 10 times [2024-06-20 16:35:15,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:15,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396448124] [2024-06-20 16:35:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:15,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:16,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:16,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396448124] [2024-06-20 16:35:16,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396448124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:16,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:16,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:16,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896471987] [2024-06-20 16:35:16,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:16,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:16,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:16,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:16,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:17,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:17,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 271 transitions, 3476 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 16:35:17,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:17,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:17,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:17,598 INFO L124 PetriNetUnfolderBase]: 652/1163 cut-off events. [2024-06-20 16:35:17,599 INFO L125 PetriNetUnfolderBase]: For 104412/104412 co-relation queries the response was YES. [2024-06-20 16:35:17,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8876 conditions, 1163 events. 652/1163 cut-off events. For 104412/104412 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6000 event pairs, 65 based on Foata normal form. 2/1163 useless extension candidates. Maximal degree in co-relation 8739. Up to 854 conditions per place. [2024-06-20 16:35:17,610 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 202 selfloop transitions, 87 changer transitions 0/291 dead transitions. [2024-06-20 16:35:17,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 291 transitions, 4142 flow [2024-06-20 16:35:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:35:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:35:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-20 16:35:17,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-20 16:35:17,611 INFO L175 Difference]: Start difference. First operand has 289 places, 271 transitions, 3476 flow. Second operand 11 states and 128 transitions. [2024-06-20 16:35:17,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 291 transitions, 4142 flow [2024-06-20 16:35:18,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 291 transitions, 3918 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-20 16:35:18,019 INFO L231 Difference]: Finished difference. Result has 289 places, 273 transitions, 3472 flow [2024-06-20 16:35:18,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3252, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3472, PETRI_PLACES=289, PETRI_TRANSITIONS=273} [2024-06-20 16:35:18,019 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 259 predicate places. [2024-06-20 16:35:18,020 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 273 transitions, 3472 flow [2024-06-20 16:35:18,020 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 16:35:18,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:18,020 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 16:35:18,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:35:18,020 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:18,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:18,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1746925835, now seen corresponding path program 1 times [2024-06-20 16:35:18,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:18,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500973832] [2024-06-20 16:35:18,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:18,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:19,571 INFO 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 16:35:19,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:19,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500973832] [2024-06-20 16:35:19,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500973832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:19,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:19,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:19,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382444231] [2024-06-20 16:35:19,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:19,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:19,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:19,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:19,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:19,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:19,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 273 transitions, 3472 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:19,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:19,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:19,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:20,167 INFO L124 PetriNetUnfolderBase]: 660/1179 cut-off events. [2024-06-20 16:35:20,168 INFO L125 PetriNetUnfolderBase]: For 114948/114948 co-relation queries the response was YES. [2024-06-20 16:35:20,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8958 conditions, 1179 events. 660/1179 cut-off events. For 114948/114948 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 6109 event pairs, 66 based on Foata normal form. 4/1181 useless extension candidates. Maximal degree in co-relation 8820. Up to 880 conditions per place. [2024-06-20 16:35:20,179 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 205 selfloop transitions, 82 changer transitions 0/289 dead transitions. [2024-06-20 16:35:20,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 289 transitions, 4116 flow [2024-06-20 16:35:20,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:20,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:20,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-20 16:35:20,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-20 16:35:20,181 INFO L175 Difference]: Start difference. First operand has 289 places, 273 transitions, 3472 flow. Second operand 10 states and 115 transitions. [2024-06-20 16:35:20,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 289 transitions, 4116 flow [2024-06-20 16:35:20,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 289 transitions, 3920 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-20 16:35:20,576 INFO L231 Difference]: Finished difference. Result has 290 places, 275 transitions, 3483 flow [2024-06-20 16:35:20,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3276, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3483, PETRI_PLACES=290, PETRI_TRANSITIONS=275} [2024-06-20 16:35:20,576 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2024-06-20 16:35:20,576 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 275 transitions, 3483 flow [2024-06-20 16:35:20,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:20,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:20,577 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 16:35:20,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:35:20,577 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:20,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:20,577 INFO L85 PathProgramCache]: Analyzing trace with hash 2112880743, now seen corresponding path program 15 times [2024-06-20 16:35:20,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:20,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100398222] [2024-06-20 16:35:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:20,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:21,557 INFO 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 16:35:21,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:21,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100398222] [2024-06-20 16:35:21,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100398222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:21,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:21,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:21,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971471719] [2024-06-20 16:35:21,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:21,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:21,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:21,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:21,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:21,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:21,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 275 transitions, 3483 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 16:35:21,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:21,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:21,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:22,051 INFO L124 PetriNetUnfolderBase]: 668/1195 cut-off events. [2024-06-20 16:35:22,051 INFO L125 PetriNetUnfolderBase]: For 117491/117491 co-relation queries the response was YES. [2024-06-20 16:35:22,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9057 conditions, 1195 events. 668/1195 cut-off events. For 117491/117491 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6225 event pairs, 78 based on Foata normal form. 4/1197 useless extension candidates. Maximal degree in co-relation 8918. Up to 1020 conditions per place. [2024-06-20 16:35:22,065 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 221 selfloop transitions, 66 changer transitions 0/289 dead transitions. [2024-06-20 16:35:22,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 289 transitions, 4120 flow [2024-06-20 16:35:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:22,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-20 16:35:22,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-20 16:35:22,066 INFO L175 Difference]: Start difference. First operand has 290 places, 275 transitions, 3483 flow. Second operand 10 states and 107 transitions. [2024-06-20 16:35:22,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 289 transitions, 4120 flow [2024-06-20 16:35:22,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 289 transitions, 3929 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:22,517 INFO L231 Difference]: Finished difference. Result has 292 places, 277 transitions, 3469 flow [2024-06-20 16:35:22,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3292, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3469, PETRI_PLACES=292, PETRI_TRANSITIONS=277} [2024-06-20 16:35:22,517 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 262 predicate places. [2024-06-20 16:35:22,517 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 277 transitions, 3469 flow [2024-06-20 16:35:22,518 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 16:35:22,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:22,518 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 16:35:22,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:35:22,518 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:22,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:22,518 INFO L85 PathProgramCache]: Analyzing trace with hash -643256047, now seen corresponding path program 11 times [2024-06-20 16:35:22,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:22,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461492414] [2024-06-20 16:35:22,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:22,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:23,683 INFO 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 16:35:23,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:23,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461492414] [2024-06-20 16:35:23,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461492414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:23,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:23,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:23,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002415911] [2024-06-20 16:35:23,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:23,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:23,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:23,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:23,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:23,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:23,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 277 transitions, 3469 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 16:35:23,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:23,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:23,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:24,169 INFO L124 PetriNetUnfolderBase]: 664/1189 cut-off events. [2024-06-20 16:35:24,170 INFO L125 PetriNetUnfolderBase]: For 103357/103357 co-relation queries the response was YES. [2024-06-20 16:35:24,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8771 conditions, 1189 events. 664/1189 cut-off events. For 103357/103357 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6206 event pairs, 81 based on Foata normal form. 2/1189 useless extension candidates. Maximal degree in co-relation 8631. Up to 628 conditions per place. [2024-06-20 16:35:24,183 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 146 selfloop transitions, 145 changer transitions 0/293 dead transitions. [2024-06-20 16:35:24,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 293 transitions, 4277 flow [2024-06-20 16:35:24,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:24,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-20 16:35:24,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-20 16:35:24,184 INFO L175 Difference]: Start difference. First operand has 292 places, 277 transitions, 3469 flow. Second operand 10 states and 120 transitions. [2024-06-20 16:35:24,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 293 transitions, 4277 flow [2024-06-20 16:35:24,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 293 transitions, 4113 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:24,631 INFO L231 Difference]: Finished difference. Result has 294 places, 277 transitions, 3600 flow [2024-06-20 16:35:24,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3305, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3600, PETRI_PLACES=294, PETRI_TRANSITIONS=277} [2024-06-20 16:35:24,632 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 264 predicate places. [2024-06-20 16:35:24,632 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 277 transitions, 3600 flow [2024-06-20 16:35:24,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:24,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:24,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:24,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:35:24,633 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:24,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:24,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1658848013, now seen corresponding path program 12 times [2024-06-20 16:35:24,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:24,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076435492] [2024-06-20 16:35:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:24,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:25,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:25,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076435492] [2024-06-20 16:35:25,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076435492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:25,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:25,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:25,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9462821] [2024-06-20 16:35:25,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:25,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:25,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:25,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:25,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:25,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:25,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 277 transitions, 3600 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 16:35:25,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:25,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:25,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:26,421 INFO L124 PetriNetUnfolderBase]: 680/1215 cut-off events. [2024-06-20 16:35:26,422 INFO L125 PetriNetUnfolderBase]: For 114177/114177 co-relation queries the response was YES. [2024-06-20 16:35:26,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9336 conditions, 1215 events. 680/1215 cut-off events. For 114177/114177 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6350 event pairs, 121 based on Foata normal form. 2/1215 useless extension candidates. Maximal degree in co-relation 9195. Up to 1128 conditions per place. [2024-06-20 16:35:26,435 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 262 selfloop transitions, 33 changer transitions 0/297 dead transitions. [2024-06-20 16:35:26,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 297 transitions, 4506 flow [2024-06-20 16:35:26,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:35:26,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:35:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-20 16:35:26,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-20 16:35:26,436 INFO L175 Difference]: Start difference. First operand has 294 places, 277 transitions, 3600 flow. Second operand 11 states and 118 transitions. [2024-06-20 16:35:26,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 297 transitions, 4506 flow [2024-06-20 16:35:26,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 297 transitions, 4296 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:26,834 INFO L231 Difference]: Finished difference. Result has 297 places, 281 transitions, 3553 flow [2024-06-20 16:35:26,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3394, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3553, PETRI_PLACES=297, PETRI_TRANSITIONS=281} [2024-06-20 16:35:26,835 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 267 predicate places. [2024-06-20 16:35:26,835 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 281 transitions, 3553 flow [2024-06-20 16:35:26,835 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 16:35:26,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:26,835 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 16:35:26,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:35:26,835 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:26,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:26,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1875988785, now seen corresponding path program 2 times [2024-06-20 16:35:26,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:26,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686706701] [2024-06-20 16:35:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:26,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:28,179 INFO 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 16:35:28,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:28,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686706701] [2024-06-20 16:35:28,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686706701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:28,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:28,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:28,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600108019] [2024-06-20 16:35:28,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:28,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:28,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:28,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:28,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:28,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:28,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 281 transitions, 3553 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:28,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:28,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:28,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:28,734 INFO L124 PetriNetUnfolderBase]: 684/1223 cut-off events. [2024-06-20 16:35:28,735 INFO L125 PetriNetUnfolderBase]: For 116717/116717 co-relation queries the response was YES. [2024-06-20 16:35:28,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9178 conditions, 1223 events. 684/1223 cut-off events. For 116717/116717 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6409 event pairs, 120 based on Foata normal form. 2/1223 useless extension candidates. Maximal degree in co-relation 9036. Up to 1180 conditions per place. [2024-06-20 16:35:28,747 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 272 selfloop transitions, 19 changer transitions 0/293 dead transitions. [2024-06-20 16:35:28,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 293 transitions, 4181 flow [2024-06-20 16:35:28,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:28,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2024-06-20 16:35:28,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31290322580645163 [2024-06-20 16:35:28,749 INFO L175 Difference]: Start difference. First operand has 297 places, 281 transitions, 3553 flow. Second operand 10 states and 97 transitions. [2024-06-20 16:35:28,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 293 transitions, 4181 flow [2024-06-20 16:35:29,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 293 transitions, 4107 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 16:35:29,180 INFO L231 Difference]: Finished difference. Result has 300 places, 282 transitions, 3544 flow [2024-06-20 16:35:29,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3479, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3544, PETRI_PLACES=300, PETRI_TRANSITIONS=282} [2024-06-20 16:35:29,181 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 270 predicate places. [2024-06-20 16:35:29,181 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 282 transitions, 3544 flow [2024-06-20 16:35:29,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:29,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:29,181 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 16:35:29,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:35:29,182 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:29,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:29,182 INFO L85 PathProgramCache]: Analyzing trace with hash -377829297, now seen corresponding path program 3 times [2024-06-20 16:35:29,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:29,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314894174] [2024-06-20 16:35:29,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:29,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:30,380 INFO 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 16:35:30,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:30,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314894174] [2024-06-20 16:35:30,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314894174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:30,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:30,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:30,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103252257] [2024-06-20 16:35:30,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:30,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:30,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:30,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:30,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:30,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:30,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 282 transitions, 3544 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:30,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:30,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:30,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:30,840 INFO L124 PetriNetUnfolderBase]: 688/1231 cut-off events. [2024-06-20 16:35:30,840 INFO L125 PetriNetUnfolderBase]: For 119082/119082 co-relation queries the response was YES. [2024-06-20 16:35:30,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9229 conditions, 1231 events. 688/1231 cut-off events. For 119082/119082 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 6503 event pairs, 115 based on Foata normal form. 2/1231 useless extension candidates. Maximal degree in co-relation 9085. Up to 1154 conditions per place. [2024-06-20 16:35:30,855 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 262 selfloop transitions, 31 changer transitions 0/295 dead transitions. [2024-06-20 16:35:30,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 295 transitions, 4182 flow [2024-06-20 16:35:30,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:30,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:30,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-20 16:35:30,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33548387096774196 [2024-06-20 16:35:30,856 INFO L175 Difference]: Start difference. First operand has 300 places, 282 transitions, 3544 flow. Second operand 10 states and 104 transitions. [2024-06-20 16:35:30,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 295 transitions, 4182 flow [2024-06-20 16:35:31,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 295 transitions, 4129 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:31,363 INFO L231 Difference]: Finished difference. Result has 302 places, 283 transitions, 3581 flow [2024-06-20 16:35:31,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3581, PETRI_PLACES=302, PETRI_TRANSITIONS=283} [2024-06-20 16:35:31,364 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 272 predicate places. [2024-06-20 16:35:31,364 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 283 transitions, 3581 flow [2024-06-20 16:35:31,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:31,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:31,364 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 16:35:31,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:35:31,365 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:31,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:31,365 INFO L85 PathProgramCache]: Analyzing trace with hash 138982995, now seen corresponding path program 4 times [2024-06-20 16:35:31,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:31,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371699710] [2024-06-20 16:35:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:31,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:32,516 INFO 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 16:35:32,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:32,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371699710] [2024-06-20 16:35:32,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371699710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:32,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:32,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:32,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272204951] [2024-06-20 16:35:32,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:32,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:32,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:32,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:32,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:32,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:32,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 283 transitions, 3581 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:32,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:32,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:32,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:33,039 INFO L124 PetriNetUnfolderBase]: 692/1239 cut-off events. [2024-06-20 16:35:33,040 INFO L125 PetriNetUnfolderBase]: For 121565/121565 co-relation queries the response was YES. [2024-06-20 16:35:33,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9322 conditions, 1239 events. 692/1239 cut-off events. For 121565/121565 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 6517 event pairs, 122 based on Foata normal form. 2/1239 useless extension candidates. Maximal degree in co-relation 9177. Up to 1199 conditions per place. [2024-06-20 16:35:33,055 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 277 selfloop transitions, 16 changer transitions 0/295 dead transitions. [2024-06-20 16:35:33,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 295 transitions, 4215 flow [2024-06-20 16:35:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 95 transitions. [2024-06-20 16:35:33,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3064516129032258 [2024-06-20 16:35:33,056 INFO L175 Difference]: Start difference. First operand has 302 places, 283 transitions, 3581 flow. Second operand 10 states and 95 transitions. [2024-06-20 16:35:33,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 295 transitions, 4215 flow [2024-06-20 16:35:33,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 295 transitions, 4135 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:33,581 INFO L231 Difference]: Finished difference. Result has 304 places, 284 transitions, 3563 flow [2024-06-20 16:35:33,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3501, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3563, PETRI_PLACES=304, PETRI_TRANSITIONS=284} [2024-06-20 16:35:33,581 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 274 predicate places. [2024-06-20 16:35:33,581 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 284 transitions, 3563 flow [2024-06-20 16:35:33,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:33,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:33,581 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 16:35:33,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:35:33,582 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:33,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:33,582 INFO L85 PathProgramCache]: Analyzing trace with hash 475324013, now seen corresponding path program 16 times [2024-06-20 16:35:33,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:33,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113523258] [2024-06-20 16:35:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:33,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:34,449 INFO 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 16:35:34,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:34,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113523258] [2024-06-20 16:35:34,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113523258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:34,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:34,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:34,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355195771] [2024-06-20 16:35:34,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:34,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:34,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:34,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:34,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:34,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:34,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 284 transitions, 3563 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 16:35:34,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:34,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:34,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:34,957 INFO L124 PetriNetUnfolderBase]: 696/1247 cut-off events. [2024-06-20 16:35:34,958 INFO L125 PetriNetUnfolderBase]: For 124104/124104 co-relation queries the response was YES. [2024-06-20 16:35:34,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9335 conditions, 1247 events. 696/1247 cut-off events. For 124104/124104 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 6566 event pairs, 126 based on Foata normal form. 2/1247 useless extension candidates. Maximal degree in co-relation 9189. Up to 1203 conditions per place. [2024-06-20 16:35:34,972 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 271 selfloop transitions, 22 changer transitions 0/295 dead transitions. [2024-06-20 16:35:34,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 295 transitions, 4191 flow [2024-06-20 16:35:34,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-06-20 16:35:34,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3193548387096774 [2024-06-20 16:35:34,974 INFO L175 Difference]: Start difference. First operand has 304 places, 284 transitions, 3563 flow. Second operand 10 states and 99 transitions. [2024-06-20 16:35:34,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 295 transitions, 4191 flow [2024-06-20 16:35:35,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 295 transitions, 4139 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:35,503 INFO L231 Difference]: Finished difference. Result has 306 places, 285 transitions, 3581 flow [2024-06-20 16:35:35,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3511, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3581, PETRI_PLACES=306, PETRI_TRANSITIONS=285} [2024-06-20 16:35:35,503 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 276 predicate places. [2024-06-20 16:35:35,503 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 285 transitions, 3581 flow [2024-06-20 16:35:35,504 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 16:35:35,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:35,504 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 16:35:35,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:35:35,504 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:35,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1875979857, now seen corresponding path program 13 times [2024-06-20 16:35:35,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:35,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439657119] [2024-06-20 16:35:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:35,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:36,465 INFO 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 16:35:36,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:36,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439657119] [2024-06-20 16:35:36,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439657119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:36,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:36,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:36,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393766651] [2024-06-20 16:35:36,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:36,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:36,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:36,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:36,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:36,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:36,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 285 transitions, 3581 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 16:35:36,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:36,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:36,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:36,985 INFO L124 PetriNetUnfolderBase]: 702/1257 cut-off events. [2024-06-20 16:35:36,986 INFO L125 PetriNetUnfolderBase]: For 126472/126472 co-relation queries the response was YES. [2024-06-20 16:35:36,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9424 conditions, 1257 events. 702/1257 cut-off events. For 126472/126472 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 6657 event pairs, 123 based on Foata normal form. 2/1257 useless extension candidates. Maximal degree in co-relation 9277. Up to 1201 conditions per place. [2024-06-20 16:35:37,001 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 274 selfloop transitions, 23 changer transitions 0/299 dead transitions. [2024-06-20 16:35:37,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 299 transitions, 4253 flow [2024-06-20 16:35:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:37,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-06-20 16:35:37,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-20 16:35:37,002 INFO L175 Difference]: Start difference. First operand has 306 places, 285 transitions, 3581 flow. Second operand 10 states and 100 transitions. [2024-06-20 16:35:37,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 299 transitions, 4253 flow [2024-06-20 16:35:37,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 299 transitions, 4197 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:37,503 INFO L231 Difference]: Finished difference. Result has 308 places, 287 transitions, 3627 flow [2024-06-20 16:35:37,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3525, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3627, PETRI_PLACES=308, PETRI_TRANSITIONS=287} [2024-06-20 16:35:37,504 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 278 predicate places. [2024-06-20 16:35:37,504 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 287 transitions, 3627 flow [2024-06-20 16:35:37,504 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 16:35:37,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:37,504 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 16:35:37,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 16:35:37,504 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:37,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:37,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2072155277, now seen corresponding path program 14 times [2024-06-20 16:35:37,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:37,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368165818] [2024-06-20 16:35:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:37,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:38,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:38,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368165818] [2024-06-20 16:35:38,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368165818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:38,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:38,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:38,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135041796] [2024-06-20 16:35:38,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:38,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:38,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:38,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:38,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 287 transitions, 3627 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 16:35:38,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:38,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:38,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:39,170 INFO L124 PetriNetUnfolderBase]: 698/1251 cut-off events. [2024-06-20 16:35:39,170 INFO L125 PetriNetUnfolderBase]: For 119686/119686 co-relation queries the response was YES. [2024-06-20 16:35:39,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9210 conditions, 1251 events. 698/1251 cut-off events. For 119686/119686 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 6632 event pairs, 121 based on Foata normal form. 2/1251 useless extension candidates. Maximal degree in co-relation 9062. Up to 1176 conditions per place. [2024-06-20 16:35:39,183 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 269 selfloop transitions, 29 changer transitions 0/300 dead transitions. [2024-06-20 16:35:39,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 300 transitions, 4259 flow [2024-06-20 16:35:39,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-20 16:35:39,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-20 16:35:39,184 INFO L175 Difference]: Start difference. First operand has 308 places, 287 transitions, 3627 flow. Second operand 10 states and 107 transitions. [2024-06-20 16:35:39,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 300 transitions, 4259 flow [2024-06-20 16:35:39,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 300 transitions, 4163 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:39,683 INFO L231 Difference]: Finished difference. Result has 310 places, 287 transitions, 3594 flow [2024-06-20 16:35:39,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3594, PETRI_PLACES=310, PETRI_TRANSITIONS=287} [2024-06-20 16:35:39,684 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 280 predicate places. [2024-06-20 16:35:39,684 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 287 transitions, 3594 flow [2024-06-20 16:35:39,684 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 16:35:39,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:39,684 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 16:35:39,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 16:35:39,684 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:39,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:39,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1590642651, now seen corresponding path program 17 times [2024-06-20 16:35:39,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:39,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030863668] [2024-06-20 16:35:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:39,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:40,611 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 16:35:40,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:40,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030863668] [2024-06-20 16:35:40,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030863668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:40,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:40,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:40,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59813301] [2024-06-20 16:35:40,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:40,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:40,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:40,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:40,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:40,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:40,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 287 transitions, 3594 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 16:35:40,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:40,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:40,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:41,050 INFO L124 PetriNetUnfolderBase]: 702/1259 cut-off events. [2024-06-20 16:35:41,051 INFO L125 PetriNetUnfolderBase]: For 121794/121794 co-relation queries the response was YES. [2024-06-20 16:35:41,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9239 conditions, 1259 events. 702/1259 cut-off events. For 121794/121794 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 6679 event pairs, 124 based on Foata normal form. 2/1259 useless extension candidates. Maximal degree in co-relation 9090. Up to 1224 conditions per place. [2024-06-20 16:35:41,064 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 279 selfloop transitions, 17 changer transitions 0/298 dead transitions. [2024-06-20 16:35:41,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 298 transitions, 4230 flow [2024-06-20 16:35:41,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:41,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:41,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 96 transitions. [2024-06-20 16:35:41,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3096774193548387 [2024-06-20 16:35:41,066 INFO L175 Difference]: Start difference. First operand has 310 places, 287 transitions, 3594 flow. Second operand 10 states and 96 transitions. [2024-06-20 16:35:41,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 298 transitions, 4230 flow [2024-06-20 16:35:41,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 298 transitions, 4167 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 16:35:41,597 INFO L231 Difference]: Finished difference. Result has 311 places, 288 transitions, 3593 flow [2024-06-20 16:35:41,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3593, PETRI_PLACES=311, PETRI_TRANSITIONS=288} [2024-06-20 16:35:41,597 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 281 predicate places. [2024-06-20 16:35:41,597 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 288 transitions, 3593 flow [2024-06-20 16:35:41,597 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 16:35:41,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:41,598 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 16:35:41,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 16:35:41,598 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:41,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:41,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2065659599, now seen corresponding path program 5 times [2024-06-20 16:35:41,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:41,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951370290] [2024-06-20 16:35:41,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:41,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:42,996 INFO 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 16:35:42,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:42,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951370290] [2024-06-20 16:35:42,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951370290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:42,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:42,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:42,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465042675] [2024-06-20 16:35:42,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:42,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:42,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:42,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:42,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:43,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:43,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 288 transitions, 3593 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:43,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:43,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:43,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:43,407 INFO L124 PetriNetUnfolderBase]: 706/1267 cut-off events. [2024-06-20 16:35:43,407 INFO L125 PetriNetUnfolderBase]: For 124443/124443 co-relation queries the response was YES. [2024-06-20 16:35:43,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9298 conditions, 1267 events. 706/1267 cut-off events. For 124443/124443 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6758 event pairs, 123 based on Foata normal form. 2/1267 useless extension candidates. Maximal degree in co-relation 9148. Up to 1223 conditions per place. [2024-06-20 16:35:43,421 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 278 selfloop transitions, 20 changer transitions 0/300 dead transitions. [2024-06-20 16:35:43,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 300 transitions, 4241 flow [2024-06-20 16:35:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:43,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-06-20 16:35:43,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3193548387096774 [2024-06-20 16:35:43,422 INFO L175 Difference]: Start difference. First operand has 311 places, 288 transitions, 3593 flow. Second operand 10 states and 99 transitions. [2024-06-20 16:35:43,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 300 transitions, 4241 flow [2024-06-20 16:35:43,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 300 transitions, 4193 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:43,935 INFO L231 Difference]: Finished difference. Result has 313 places, 289 transitions, 3617 flow [2024-06-20 16:35:43,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3545, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3617, PETRI_PLACES=313, PETRI_TRANSITIONS=289} [2024-06-20 16:35:43,935 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2024-06-20 16:35:43,935 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 289 transitions, 3617 flow [2024-06-20 16:35:43,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:43,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:43,936 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 16:35:43,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 16:35:43,936 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:43,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:43,936 INFO L85 PathProgramCache]: Analyzing trace with hash 481817459, now seen corresponding path program 15 times [2024-06-20 16:35:43,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:43,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438976802] [2024-06-20 16:35:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:43,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:45,264 INFO 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 16:35:45,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:45,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438976802] [2024-06-20 16:35:45,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438976802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:45,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:45,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:45,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532732572] [2024-06-20 16:35:45,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:45,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:45,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:45,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:45,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:45,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:45,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 289 transitions, 3617 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 16:35:45,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:45,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:45,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:45,907 INFO L124 PetriNetUnfolderBase]: 712/1277 cut-off events. [2024-06-20 16:35:45,907 INFO L125 PetriNetUnfolderBase]: For 126908/126908 co-relation queries the response was YES. [2024-06-20 16:35:45,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9399 conditions, 1277 events. 712/1277 cut-off events. For 126908/126908 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 6818 event pairs, 123 based on Foata normal form. 2/1277 useless extension candidates. Maximal degree in co-relation 9248. Up to 1202 conditions per place. [2024-06-20 16:35:45,921 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 271 selfloop transitions, 30 changer transitions 0/303 dead transitions. [2024-06-20 16:35:45,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 303 transitions, 4301 flow [2024-06-20 16:35:45,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:45,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-20 16:35:45,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-20 16:35:45,924 INFO L175 Difference]: Start difference. First operand has 313 places, 289 transitions, 3617 flow. Second operand 10 states and 105 transitions. [2024-06-20 16:35:45,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 303 transitions, 4301 flow [2024-06-20 16:35:46,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 303 transitions, 4239 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:46,457 INFO L231 Difference]: Finished difference. Result has 315 places, 291 transitions, 3674 flow [2024-06-20 16:35:46,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3555, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3674, PETRI_PLACES=315, PETRI_TRANSITIONS=291} [2024-06-20 16:35:46,457 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 285 predicate places. [2024-06-20 16:35:46,457 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 291 transitions, 3674 flow [2024-06-20 16:35:46,457 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 16:35:46,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:46,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:46,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 16:35:46,458 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:46,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:46,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1590888915, now seen corresponding path program 6 times [2024-06-20 16:35:46,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:46,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359582613] [2024-06-20 16:35:46,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:46,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:47,639 INFO 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 16:35:47,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:47,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359582613] [2024-06-20 16:35:47,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359582613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:47,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:47,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:47,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729612417] [2024-06-20 16:35:47,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:47,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:47,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:47,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:47,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:47,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:47,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 291 transitions, 3674 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:47,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:47,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:47,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:48,115 INFO L124 PetriNetUnfolderBase]: 709/1272 cut-off events. [2024-06-20 16:35:48,115 INFO L125 PetriNetUnfolderBase]: For 118751/118751 co-relation queries the response was YES. [2024-06-20 16:35:48,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9177 conditions, 1272 events. 709/1272 cut-off events. For 118751/118751 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 6783 event pairs, 120 based on Foata normal form. 2/1272 useless extension candidates. Maximal degree in co-relation 9025. Up to 1222 conditions per place. [2024-06-20 16:35:48,130 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 279 selfloop transitions, 22 changer transitions 0/303 dead transitions. [2024-06-20 16:35:48,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 303 transitions, 4306 flow [2024-06-20 16:35:48,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:48,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-06-20 16:35:48,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-20 16:35:48,131 INFO L175 Difference]: Start difference. First operand has 315 places, 291 transitions, 3674 flow. Second operand 10 states and 100 transitions. [2024-06-20 16:35:48,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 303 transitions, 4306 flow [2024-06-20 16:35:48,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 303 transitions, 4211 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:48,696 INFO L231 Difference]: Finished difference. Result has 317 places, 291 transitions, 3627 flow [2024-06-20 16:35:48,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3627, PETRI_PLACES=317, PETRI_TRANSITIONS=291} [2024-06-20 16:35:48,697 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 287 predicate places. [2024-06-20 16:35:48,697 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 291 transitions, 3627 flow [2024-06-20 16:35:48,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:48,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:48,697 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 16:35:48,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 16:35:48,698 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:48,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:48,698 INFO L85 PathProgramCache]: Analyzing trace with hash 481586819, now seen corresponding path program 16 times [2024-06-20 16:35:48,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:48,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845423213] [2024-06-20 16:35:48,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:48,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:49,867 INFO 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 16:35:49,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:49,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845423213] [2024-06-20 16:35:49,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845423213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:49,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:49,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:49,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028799549] [2024-06-20 16:35:49,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:49,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:49,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:49,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:49,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:49,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:49,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 291 transitions, 3627 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 16:35:49,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:49,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:49,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:50,463 INFO L124 PetriNetUnfolderBase]: 715/1282 cut-off events. [2024-06-20 16:35:50,463 INFO L125 PetriNetUnfolderBase]: For 121037/121037 co-relation queries the response was YES. [2024-06-20 16:35:50,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9226 conditions, 1282 events. 715/1282 cut-off events. For 121037/121037 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6860 event pairs, 122 based on Foata normal form. 2/1282 useless extension candidates. Maximal degree in co-relation 9073. Up to 1207 conditions per place. [2024-06-20 16:35:50,477 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 275 selfloop transitions, 29 changer transitions 0/306 dead transitions. [2024-06-20 16:35:50,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 306 transitions, 4325 flow [2024-06-20 16:35:50,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:50,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-20 16:35:50,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-20 16:35:50,487 INFO L175 Difference]: Start difference. First operand has 317 places, 291 transitions, 3627 flow. Second operand 10 states and 107 transitions. [2024-06-20 16:35:50,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 306 transitions, 4325 flow [2024-06-20 16:35:51,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 306 transitions, 4206 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-20 16:35:51,056 INFO L231 Difference]: Finished difference. Result has 316 places, 293 transitions, 3629 flow [2024-06-20 16:35:51,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3629, PETRI_PLACES=316, PETRI_TRANSITIONS=293} [2024-06-20 16:35:51,056 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 286 predicate places. [2024-06-20 16:35:51,056 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 293 transitions, 3629 flow [2024-06-20 16:35:51,056 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 16:35:51,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:51,057 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 16:35:51,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 16:35:51,057 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:51,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:51,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1590879987, now seen corresponding path program 17 times [2024-06-20 16:35:51,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:51,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505047985] [2024-06-20 16:35:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:51,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:52,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:52,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505047985] [2024-06-20 16:35:52,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505047985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:52,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:52,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:52,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390477139] [2024-06-20 16:35:52,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:52,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:52,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:52,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:52,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:52,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:52,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 293 transitions, 3629 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 16:35:52,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:52,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:52,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:52,658 INFO L124 PetriNetUnfolderBase]: 721/1292 cut-off events. [2024-06-20 16:35:52,658 INFO L125 PetriNetUnfolderBase]: For 123549/123549 co-relation queries the response was YES. [2024-06-20 16:35:52,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9233 conditions, 1292 events. 721/1292 cut-off events. For 123549/123549 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 6917 event pairs, 123 based on Foata normal form. 2/1292 useless extension candidates. Maximal degree in co-relation 9082. Up to 1212 conditions per place. [2024-06-20 16:35:52,672 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 277 selfloop transitions, 29 changer transitions 0/308 dead transitions. [2024-06-20 16:35:52,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 308 transitions, 4335 flow [2024-06-20 16:35:52,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:52,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-20 16:35:52,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-20 16:35:52,687 INFO L175 Difference]: Start difference. First operand has 316 places, 293 transitions, 3629 flow. Second operand 10 states and 105 transitions. [2024-06-20 16:35:52,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 308 transitions, 4335 flow [2024-06-20 16:35:53,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 308 transitions, 4238 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:53,266 INFO L231 Difference]: Finished difference. Result has 318 places, 295 transitions, 3657 flow [2024-06-20 16:35:53,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3657, PETRI_PLACES=318, PETRI_TRANSITIONS=295} [2024-06-20 16:35:53,267 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 288 predicate places. [2024-06-20 16:35:53,267 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 295 transitions, 3657 flow [2024-06-20 16:35:53,267 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 16:35:53,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:53,267 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 16:35:53,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 16:35:53,267 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:53,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:53,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1590642837, now seen corresponding path program 18 times [2024-06-20 16:35:53,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:53,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833790520] [2024-06-20 16:35:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:53,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:54,319 INFO 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 16:35:54,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:54,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833790520] [2024-06-20 16:35:54,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833790520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:54,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:54,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:54,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444206686] [2024-06-20 16:35:54,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:54,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:54,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:54,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:54,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:54,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:54,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 295 transitions, 3657 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 16:35:54,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:54,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:54,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:54,859 INFO L124 PetriNetUnfolderBase]: 737/1318 cut-off events. [2024-06-20 16:35:54,860 INFO L125 PetriNetUnfolderBase]: For 137793/137793 co-relation queries the response was YES. [2024-06-20 16:35:54,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9693 conditions, 1318 events. 737/1318 cut-off events. For 137793/137793 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 7052 event pairs, 121 based on Foata normal form. 2/1318 useless extension candidates. Maximal degree in co-relation 9541. Up to 1208 conditions per place. [2024-06-20 16:35:54,874 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 273 selfloop transitions, 38 changer transitions 0/313 dead transitions. [2024-06-20 16:35:54,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 313 transitions, 4651 flow [2024-06-20 16:35:54,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-20 16:35:54,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-20 16:35:54,876 INFO L175 Difference]: Start difference. First operand has 318 places, 295 transitions, 3657 flow. Second operand 10 states and 106 transitions. [2024-06-20 16:35:54,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 313 transitions, 4651 flow [2024-06-20 16:35:55,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 313 transitions, 4550 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:55,482 INFO L231 Difference]: Finished difference. Result has 320 places, 299 transitions, 3765 flow [2024-06-20 16:35:55,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3556, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3765, PETRI_PLACES=320, PETRI_TRANSITIONS=299} [2024-06-20 16:35:55,482 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 290 predicate places. [2024-06-20 16:35:55,483 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 299 transitions, 3765 flow [2024-06-20 16:35:55,483 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 16:35:55,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:55,483 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 16:35:55,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 16:35:55,483 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:55,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:55,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1590649347, now seen corresponding path program 19 times [2024-06-20 16:35:55,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:55,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843053440] [2024-06-20 16:35:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:55,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:56,524 INFO 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 16:35:56,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:56,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843053440] [2024-06-20 16:35:56,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843053440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:56,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:56,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:56,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742793261] [2024-06-20 16:35:56,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:56,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:56,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:56,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:56,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:56,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:56,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 299 transitions, 3765 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 16:35:56,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:56,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:56,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:57,081 INFO L124 PetriNetUnfolderBase]: 733/1312 cut-off events. [2024-06-20 16:35:57,081 INFO L125 PetriNetUnfolderBase]: For 128907/128907 co-relation queries the response was YES. [2024-06-20 16:35:57,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9425 conditions, 1312 events. 733/1312 cut-off events. For 128907/128907 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 7036 event pairs, 121 based on Foata normal form. 2/1312 useless extension candidates. Maximal degree in co-relation 9272. Up to 1232 conditions per place. [2024-06-20 16:35:57,096 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 279 selfloop transitions, 31 changer transitions 0/312 dead transitions. [2024-06-20 16:35:57,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 312 transitions, 4421 flow [2024-06-20 16:35:57,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-20 16:35:57,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33548387096774196 [2024-06-20 16:35:57,097 INFO L175 Difference]: Start difference. First operand has 320 places, 299 transitions, 3765 flow. Second operand 10 states and 104 transitions. [2024-06-20 16:35:57,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 312 transitions, 4421 flow [2024-06-20 16:35:57,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 312 transitions, 4293 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-20 16:35:57,669 INFO L231 Difference]: Finished difference. Result has 324 places, 299 transitions, 3704 flow [2024-06-20 16:35:57,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3637, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3704, PETRI_PLACES=324, PETRI_TRANSITIONS=299} [2024-06-20 16:35:57,670 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 294 predicate places. [2024-06-20 16:35:57,670 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 299 transitions, 3704 flow [2024-06-20 16:35:57,670 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 16:35:57,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:57,670 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 16:35:57,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 16:35:57,671 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:57,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:57,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2065905863, now seen corresponding path program 18 times [2024-06-20 16:35:57,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:57,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708910642] [2024-06-20 16:35:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:57,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:58,721 INFO 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 16:35:58,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:58,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708910642] [2024-06-20 16:35:58,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708910642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:58,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:58,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:58,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471124022] [2024-06-20 16:35:58,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:58,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:58,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:58,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:58,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 299 transitions, 3704 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 16:35:58,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:58,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:58,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:59,252 INFO L124 PetriNetUnfolderBase]: 730/1307 cut-off events. [2024-06-20 16:35:59,253 INFO L125 PetriNetUnfolderBase]: For 118900/118900 co-relation queries the response was YES. [2024-06-20 16:35:59,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9124 conditions, 1307 events. 730/1307 cut-off events. For 118900/118900 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 7010 event pairs, 129 based on Foata normal form. 2/1307 useless extension candidates. Maximal degree in co-relation 8969. Up to 1263 conditions per place. [2024-06-20 16:35:59,267 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 285 selfloop transitions, 22 changer transitions 0/309 dead transitions. [2024-06-20 16:35:59,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 309 transitions, 4340 flow [2024-06-20 16:35:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:59,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:59,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-06-20 16:35:59,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3193548387096774 [2024-06-20 16:35:59,268 INFO L175 Difference]: Start difference. First operand has 324 places, 299 transitions, 3704 flow. Second operand 10 states and 99 transitions. [2024-06-20 16:35:59,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 309 transitions, 4340 flow [2024-06-20 16:35:59,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 309 transitions, 4252 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 16:35:59,879 INFO L231 Difference]: Finished difference. Result has 325 places, 299 transitions, 3664 flow [2024-06-20 16:35:59,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3616, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3664, PETRI_PLACES=325, PETRI_TRANSITIONS=299} [2024-06-20 16:35:59,880 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 295 predicate places. [2024-06-20 16:35:59,880 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 299 transitions, 3664 flow [2024-06-20 16:35:59,880 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 16:35:59,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:59,880 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 16:35:59,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 16:35:59,880 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:59,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:59,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2065905677, now seen corresponding path program 20 times [2024-06-20 16:35:59,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:59,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624902575] [2024-06-20 16:35:59,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:59,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:00,997 INFO 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 16:36:00,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:00,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624902575] [2024-06-20 16:36:00,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624902575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:00,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:00,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:36:00,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982998766] [2024-06-20 16:36:00,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:00,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:36:00,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:00,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:36:00,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:36:01,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:01,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 299 transitions, 3664 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 16:36:01,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:01,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:01,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:01,534 INFO L124 PetriNetUnfolderBase]: 726/1301 cut-off events. [2024-06-20 16:36:01,535 INFO L125 PetriNetUnfolderBase]: For 109153/109153 co-relation queries the response was YES. [2024-06-20 16:36:01,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8804 conditions, 1301 events. 726/1301 cut-off events. For 109153/109153 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 6992 event pairs, 124 based on Foata normal form. 2/1301 useless extension candidates. Maximal degree in co-relation 8648. Up to 1209 conditions per place. [2024-06-20 16:36:01,549 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 276 selfloop transitions, 34 changer transitions 0/312 dead transitions. [2024-06-20 16:36:01,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 312 transitions, 4320 flow [2024-06-20 16:36:01,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-20 16:36:01,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-20 16:36:01,550 INFO L175 Difference]: Start difference. First operand has 325 places, 299 transitions, 3664 flow. Second operand 10 states and 108 transitions. [2024-06-20 16:36:01,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 312 transitions, 4320 flow [2024-06-20 16:36:02,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 312 transitions, 4260 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 16:36:02,119 INFO L231 Difference]: Finished difference. Result has 327 places, 299 transitions, 3677 flow [2024-06-20 16:36:02,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3604, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3677, PETRI_PLACES=327, PETRI_TRANSITIONS=299} [2024-06-20 16:36:02,120 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 297 predicate places. [2024-06-20 16:36:02,120 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 299 transitions, 3677 flow [2024-06-20 16:36:02,120 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 16:36:02,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:02,120 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 16:36:02,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 16:36:02,120 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:02,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:02,121 INFO L85 PathProgramCache]: Analyzing trace with hash 364052543, now seen corresponding path program 19 times [2024-06-20 16:36:02,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:02,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493499295] [2024-06-20 16:36:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:02,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:02,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:02,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493499295] [2024-06-20 16:36:02,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493499295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:02,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:02,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:36:02,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119196405] [2024-06-20 16:36:02,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:02,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:36:02,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:02,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:36:02,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:36:02,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:02,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 299 transitions, 3677 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 16:36:02,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:02,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:02,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:03,440 INFO L124 PetriNetUnfolderBase]: 723/1296 cut-off events. [2024-06-20 16:36:03,440 INFO L125 PetriNetUnfolderBase]: For 99136/99136 co-relation queries the response was YES. [2024-06-20 16:36:03,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8595 conditions, 1296 events. 723/1296 cut-off events. For 99136/99136 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 6958 event pairs, 87 based on Foata normal form. 2/1296 useless extension candidates. Maximal degree in co-relation 8438. Up to 1121 conditions per place. [2024-06-20 16:36:03,455 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 249 selfloop transitions, 61 changer transitions 0/312 dead transitions. [2024-06-20 16:36:03,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 312 transitions, 4329 flow [2024-06-20 16:36:03,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-20 16:36:03,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-20 16:36:03,456 INFO L175 Difference]: Start difference. First operand has 327 places, 299 transitions, 3677 flow. Second operand 10 states and 115 transitions. [2024-06-20 16:36:03,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 312 transitions, 4329 flow [2024-06-20 16:36:03,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 312 transitions, 3785 flow, removed 27 selfloop flow, removed 15 redundant places. [2024-06-20 16:36:03,948 INFO L231 Difference]: Finished difference. Result has 322 places, 299 transitions, 3259 flow [2024-06-20 16:36:03,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3133, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3259, PETRI_PLACES=322, PETRI_TRANSITIONS=299} [2024-06-20 16:36:03,948 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2024-06-20 16:36:03,948 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 299 transitions, 3259 flow [2024-06-20 16:36:03,948 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 16:36:03,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:03,949 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 16:36:03,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 16:36:03,949 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:03,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:03,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2052911943, now seen corresponding path program 20 times [2024-06-20 16:36:03,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:03,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85634018] [2024-06-20 16:36:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:03,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:04,695 INFO 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 16:36:04,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:04,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85634018] [2024-06-20 16:36:04,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85634018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:04,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:04,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:36:04,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597083025] [2024-06-20 16:36:04,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:04,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:36:04,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:04,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:36:04,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:36:04,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:04,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 299 transitions, 3259 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 16:36:04,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:04,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:04,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:05,233 INFO L124 PetriNetUnfolderBase]: 732/1315 cut-off events. [2024-06-20 16:36:05,233 INFO L125 PetriNetUnfolderBase]: For 100249/100249 co-relation queries the response was YES. [2024-06-20 16:36:05,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7980 conditions, 1315 events. 732/1315 cut-off events. For 100249/100249 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7105 event pairs, 85 based on Foata normal form. 2/1315 useless extension candidates. Maximal degree in co-relation 7827. Up to 1076 conditions per place. [2024-06-20 16:36:05,247 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 246 selfloop transitions, 72 changer transitions 0/320 dead transitions. [2024-06-20 16:36:05,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 320 transitions, 4208 flow [2024-06-20 16:36:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-20 16:36:05,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-20 16:36:05,249 INFO L175 Difference]: Start difference. First operand has 322 places, 299 transitions, 3259 flow. Second operand 10 states and 123 transitions. [2024-06-20 16:36:05,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 320 transitions, 4208 flow [2024-06-20 16:36:05,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 320 transitions, 4040 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-20 16:36:05,738 INFO L231 Difference]: Finished difference. Result has 324 places, 302 transitions, 3299 flow [2024-06-20 16:36:05,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3092, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3299, PETRI_PLACES=324, PETRI_TRANSITIONS=302} [2024-06-20 16:36:05,739 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 294 predicate places. [2024-06-20 16:36:05,739 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 302 transitions, 3299 flow [2024-06-20 16:36:05,739 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 16:36:05,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:05,739 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 16:36:05,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 16:36:05,740 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:05,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:05,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1828259491, now seen corresponding path program 21 times [2024-06-20 16:36:05,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:05,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428572662] [2024-06-20 16:36:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:05,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:06,683 INFO 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 16:36:06,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:06,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428572662] [2024-06-20 16:36:06,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428572662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:06,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:06,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:36:06,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369085741] [2024-06-20 16:36:06,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:06,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:36:06,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:06,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:36:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:36:06,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:06,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 302 transitions, 3299 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 16:36:06,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:06,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:06,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:07,259 INFO L124 PetriNetUnfolderBase]: 729/1310 cut-off events. [2024-06-20 16:36:07,260 INFO L125 PetriNetUnfolderBase]: For 89821/89821 co-relation queries the response was YES. [2024-06-20 16:36:07,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7725 conditions, 1310 events. 729/1310 cut-off events. For 89821/89821 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7069 event pairs, 86 based on Foata normal form. 2/1310 useless extension candidates. Maximal degree in co-relation 7574. Up to 1122 conditions per place. [2024-06-20 16:36:07,275 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 249 selfloop transitions, 66 changer transitions 0/317 dead transitions. [2024-06-20 16:36:07,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 317 transitions, 3969 flow [2024-06-20 16:36:07,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:07,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-20 16:36:07,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-20 16:36:07,276 INFO L175 Difference]: Start difference. First operand has 324 places, 302 transitions, 3299 flow. Second operand 10 states and 118 transitions. [2024-06-20 16:36:07,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 317 transitions, 3969 flow [2024-06-20 16:36:07,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 317 transitions, 3641 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-20 16:36:07,680 INFO L231 Difference]: Finished difference. Result has 325 places, 302 transitions, 3107 flow [2024-06-20 16:36:07,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2971, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3107, PETRI_PLACES=325, PETRI_TRANSITIONS=302} [2024-06-20 16:36:07,680 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 295 predicate places. [2024-06-20 16:36:07,681 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 302 transitions, 3107 flow [2024-06-20 16:36:07,681 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 16:36:07,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:07,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:07,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 16:36:07,681 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:07,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:07,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1700312977, now seen corresponding path program 1 times [2024-06-20 16:36:07,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:07,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192248943] [2024-06-20 16:36:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:07,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:08,652 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 16:36:08,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:08,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192248943] [2024-06-20 16:36:08,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192248943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:08,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:08,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:36:08,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843136090] [2024-06-20 16:36:08,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:08,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:36:08,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:08,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:36:08,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:36:08,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:08,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 302 transitions, 3107 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:08,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:08,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:08,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:09,135 INFO L124 PetriNetUnfolderBase]: 763/1384 cut-off events. [2024-06-20 16:36:09,136 INFO L125 PetriNetUnfolderBase]: For 177195/177195 co-relation queries the response was YES. [2024-06-20 16:36:09,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8449 conditions, 1384 events. 763/1384 cut-off events. For 177195/177195 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 7483 event pairs, 121 based on Foata normal form. 8/1390 useless extension candidates. Maximal degree in co-relation 8300. Up to 665 conditions per place. [2024-06-20 16:36:09,151 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 198 selfloop transitions, 103 changer transitions 23/326 dead transitions. [2024-06-20 16:36:09,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 326 transitions, 4059 flow [2024-06-20 16:36:09,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:09,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-20 16:36:09,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-20 16:36:09,152 INFO L175 Difference]: Start difference. First operand has 325 places, 302 transitions, 3107 flow. Second operand 10 states and 116 transitions. [2024-06-20 16:36:09,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 326 transitions, 4059 flow [2024-06-20 16:36:09,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 326 transitions, 3837 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 16:36:09,880 INFO L231 Difference]: Finished difference. Result has 326 places, 292 transitions, 2992 flow [2024-06-20 16:36:09,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2885, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2992, PETRI_PLACES=326, PETRI_TRANSITIONS=292} [2024-06-20 16:36:09,881 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 296 predicate places. [2024-06-20 16:36:09,881 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 292 transitions, 2992 flow [2024-06-20 16:36:09,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:09,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:09,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:09,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 16:36:09,882 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:09,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:09,882 INFO L85 PathProgramCache]: Analyzing trace with hash 104272043, now seen corresponding path program 2 times [2024-06-20 16:36:09,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:09,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458425391] [2024-06-20 16:36:09,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:09,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:11,238 INFO 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 16:36:11,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:11,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458425391] [2024-06-20 16:36:11,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458425391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:11,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:11,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:11,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257547167] [2024-06-20 16:36:11,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:11,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:11,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:11,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:11,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:11,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:11,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 292 transitions, 2992 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:11,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:11,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:11,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:11,983 INFO L124 PetriNetUnfolderBase]: 757/1386 cut-off events. [2024-06-20 16:36:11,983 INFO L125 PetriNetUnfolderBase]: For 244023/244023 co-relation queries the response was YES. [2024-06-20 16:36:11,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9521 conditions, 1386 events. 757/1386 cut-off events. For 244023/244023 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 7577 event pairs, 90 based on Foata normal form. 8/1392 useless extension candidates. Maximal degree in co-relation 9371. Up to 681 conditions per place. [2024-06-20 16:36:11,997 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 146 selfloop transitions, 167 changer transitions 8/323 dead transitions. [2024-06-20 16:36:11,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 323 transitions, 3954 flow [2024-06-20 16:36:11,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 16:36:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 16:36:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 166 transitions. [2024-06-20 16:36:11,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824884792626728 [2024-06-20 16:36:11,998 INFO L175 Difference]: Start difference. First operand has 326 places, 292 transitions, 2992 flow. Second operand 14 states and 166 transitions. [2024-06-20 16:36:11,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 323 transitions, 3954 flow [2024-06-20 16:36:12,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 323 transitions, 3733 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-06-20 16:36:12,686 INFO L231 Difference]: Finished difference. Result has 319 places, 290 transitions, 3103 flow [2024-06-20 16:36:12,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2779, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3103, PETRI_PLACES=319, PETRI_TRANSITIONS=290} [2024-06-20 16:36:12,686 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 289 predicate places. [2024-06-20 16:36:12,686 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 290 transitions, 3103 flow [2024-06-20 16:36:12,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:12,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:12,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:12,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 16:36:12,687 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:12,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:12,687 INFO L85 PathProgramCache]: Analyzing trace with hash 104277623, now seen corresponding path program 3 times [2024-06-20 16:36:12,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:12,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538171561] [2024-06-20 16:36:12,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:12,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:13,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:13,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538171561] [2024-06-20 16:36:13,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538171561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:13,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:13,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:13,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963591590] [2024-06-20 16:36:13,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:13,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:13,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:13,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:13,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:13,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:13,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 290 transitions, 3103 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:13,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:13,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:13,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:14,444 INFO L124 PetriNetUnfolderBase]: 768/1407 cut-off events. [2024-06-20 16:36:14,445 INFO L125 PetriNetUnfolderBase]: For 243337/243337 co-relation queries the response was YES. [2024-06-20 16:36:14,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9805 conditions, 1407 events. 768/1407 cut-off events. For 243337/243337 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 7690 event pairs, 102 based on Foata normal form. 10/1415 useless extension candidates. Maximal degree in co-relation 9664. Up to 762 conditions per place. [2024-06-20 16:36:14,459 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 154 selfloop transitions, 147 changer transitions 15/318 dead transitions. [2024-06-20 16:36:14,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 318 transitions, 3878 flow [2024-06-20 16:36:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-20 16:36:14,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-20 16:36:14,468 INFO L175 Difference]: Start difference. First operand has 319 places, 290 transitions, 3103 flow. Second operand 11 states and 125 transitions. [2024-06-20 16:36:14,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 318 transitions, 3878 flow [2024-06-20 16:36:15,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 318 transitions, 3581 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-06-20 16:36:15,099 INFO L231 Difference]: Finished difference. Result has 317 places, 292 transitions, 3152 flow [2024-06-20 16:36:15,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2820, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3152, PETRI_PLACES=317, PETRI_TRANSITIONS=292} [2024-06-20 16:36:15,100 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 287 predicate places. [2024-06-20 16:36:15,100 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 292 transitions, 3152 flow [2024-06-20 16:36:15,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:15,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:15,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:15,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 16:36:15,101 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:15,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:15,101 INFO L85 PathProgramCache]: Analyzing trace with hash 100552973, now seen corresponding path program 4 times [2024-06-20 16:36:15,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:15,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933391555] [2024-06-20 16:36:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:15,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:16,023 INFO 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 16:36:16,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:16,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933391555] [2024-06-20 16:36:16,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933391555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:16,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:16,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:36:16,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871685867] [2024-06-20 16:36:16,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:16,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:36:16,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:16,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:36:16,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:36:16,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:16,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 292 transitions, 3152 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:16,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:16,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:16,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:16,544 INFO L124 PetriNetUnfolderBase]: 753/1382 cut-off events. [2024-06-20 16:36:16,544 INFO L125 PetriNetUnfolderBase]: For 227151/227151 co-relation queries the response was YES. [2024-06-20 16:36:16,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9650 conditions, 1382 events. 753/1382 cut-off events. For 227151/227151 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 7549 event pairs, 123 based on Foata normal form. 8/1388 useless extension candidates. Maximal degree in co-relation 9509. Up to 545 conditions per place. [2024-06-20 16:36:16,561 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 179 selfloop transitions, 116 changer transitions 19/316 dead transitions. [2024-06-20 16:36:16,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 316 transitions, 4070 flow [2024-06-20 16:36:16,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:16,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-20 16:36:16,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:36:16,562 INFO L175 Difference]: Start difference. First operand has 317 places, 292 transitions, 3152 flow. Second operand 10 states and 124 transitions. [2024-06-20 16:36:16,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 316 transitions, 4070 flow [2024-06-20 16:36:17,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 316 transitions, 3893 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:36:17,304 INFO L231 Difference]: Finished difference. Result has 318 places, 283 transitions, 3100 flow [2024-06-20 16:36:17,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3100, PETRI_PLACES=318, PETRI_TRANSITIONS=283} [2024-06-20 16:36:17,304 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 288 predicate places. [2024-06-20 16:36:17,304 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 283 transitions, 3100 flow [2024-06-20 16:36:17,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:17,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:17,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:17,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 16:36:17,305 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:17,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:17,305 INFO L85 PathProgramCache]: Analyzing trace with hash 104127893, now seen corresponding path program 5 times [2024-06-20 16:36:17,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:17,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216590297] [2024-06-20 16:36:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:17,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:18,244 INFO 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 16:36:18,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:18,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216590297] [2024-06-20 16:36:18,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216590297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:18,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:18,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:36:18,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93591955] [2024-06-20 16:36:18,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:18,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:36:18,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:18,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:36:18,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:36:18,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:18,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 283 transitions, 3100 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:18,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:18,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:18,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:18,857 INFO L124 PetriNetUnfolderBase]: 756/1399 cut-off events. [2024-06-20 16:36:18,857 INFO L125 PetriNetUnfolderBase]: For 286684/286684 co-relation queries the response was YES. [2024-06-20 16:36:18,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10707 conditions, 1399 events. 756/1399 cut-off events. For 286684/286684 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 7668 event pairs, 126 based on Foata normal form. 8/1405 useless extension candidates. Maximal degree in co-relation 10567. Up to 678 conditions per place. [2024-06-20 16:36:18,869 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 163 selfloop transitions, 118 changer transitions 24/307 dead transitions. [2024-06-20 16:36:18,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 307 transitions, 4002 flow [2024-06-20 16:36:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-20 16:36:18,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-20 16:36:18,870 INFO L175 Difference]: Start difference. First operand has 318 places, 283 transitions, 3100 flow. Second operand 10 states and 127 transitions. [2024-06-20 16:36:18,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 307 transitions, 4002 flow [2024-06-20 16:36:19,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 307 transitions, 3744 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-20 16:36:19,751 INFO L231 Difference]: Finished difference. Result has 311 places, 267 transitions, 2892 flow [2024-06-20 16:36:19,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2850, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2892, PETRI_PLACES=311, PETRI_TRANSITIONS=267} [2024-06-20 16:36:19,751 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 281 predicate places. [2024-06-20 16:36:19,752 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 267 transitions, 2892 flow [2024-06-20 16:36:19,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:19,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:19,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:19,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 16:36:19,752 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:19,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1954820749, now seen corresponding path program 6 times [2024-06-20 16:36:19,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:19,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506583569] [2024-06-20 16:36:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:19,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:21,179 INFO 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 16:36:21,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:21,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506583569] [2024-06-20 16:36:21,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506583569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:21,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:21,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:21,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991398750] [2024-06-20 16:36:21,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:21,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:21,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:21,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:21,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:21,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:21,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 267 transitions, 2892 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:21,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:21,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:21,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:21,673 INFO L124 PetriNetUnfolderBase]: 703/1293 cut-off events. [2024-06-20 16:36:21,673 INFO L125 PetriNetUnfolderBase]: For 225903/225903 co-relation queries the response was YES. [2024-06-20 16:36:21,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9104 conditions, 1293 events. 703/1293 cut-off events. For 225903/225903 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7001 event pairs, 96 based on Foata normal form. 10/1301 useless extension candidates. Maximal degree in co-relation 8968. Up to 957 conditions per place. [2024-06-20 16:36:21,684 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 194 selfloop transitions, 78 changer transitions 12/286 dead transitions. [2024-06-20 16:36:21,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 286 transitions, 3518 flow [2024-06-20 16:36:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:21,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:21,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-20 16:36:21,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-20 16:36:21,685 INFO L175 Difference]: Start difference. First operand has 311 places, 267 transitions, 2892 flow. Second operand 11 states and 123 transitions. [2024-06-20 16:36:21,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 286 transitions, 3518 flow [2024-06-20 16:36:22,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 286 transitions, 3110 flow, removed 7 selfloop flow, removed 17 redundant places. [2024-06-20 16:36:22,484 INFO L231 Difference]: Finished difference. Result has 296 places, 264 transitions, 2621 flow [2024-06-20 16:36:22,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2484, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2621, PETRI_PLACES=296, PETRI_TRANSITIONS=264} [2024-06-20 16:36:22,484 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-06-20 16:36:22,484 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 264 transitions, 2621 flow [2024-06-20 16:36:22,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:22,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:22,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:22,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 16:36:22,493 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:22,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:22,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1954618939, now seen corresponding path program 7 times [2024-06-20 16:36:22,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:22,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968466054] [2024-06-20 16:36:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:22,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:23,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:23,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968466054] [2024-06-20 16:36:23,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968466054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:23,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:23,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:23,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262992514] [2024-06-20 16:36:23,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:23,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:23,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:23,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:23,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:23,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:23,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 264 transitions, 2621 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:23,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:23,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:23,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:24,213 INFO L124 PetriNetUnfolderBase]: 664/1220 cut-off events. [2024-06-20 16:36:24,214 INFO L125 PetriNetUnfolderBase]: For 156748/156748 co-relation queries the response was YES. [2024-06-20 16:36:24,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7496 conditions, 1220 events. 664/1220 cut-off events. For 156748/156748 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6543 event pairs, 77 based on Foata normal form. 10/1228 useless extension candidates. Maximal degree in co-relation 7365. Up to 878 conditions per place. [2024-06-20 16:36:24,226 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 190 selfloop transitions, 78 changer transitions 13/283 dead transitions. [2024-06-20 16:36:24,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 283 transitions, 3241 flow [2024-06-20 16:36:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-20 16:36:24,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-20 16:36:24,227 INFO L175 Difference]: Start difference. First operand has 296 places, 264 transitions, 2621 flow. Second operand 11 states and 123 transitions. [2024-06-20 16:36:24,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 283 transitions, 3241 flow [2024-06-20 16:36:24,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 283 transitions, 3081 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:24,702 INFO L231 Difference]: Finished difference. Result has 294 places, 260 transitions, 2593 flow [2024-06-20 16:36:24,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2593, PETRI_PLACES=294, PETRI_TRANSITIONS=260} [2024-06-20 16:36:24,703 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 264 predicate places. [2024-06-20 16:36:24,703 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 260 transitions, 2593 flow [2024-06-20 16:36:24,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:24,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:24,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:24,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 16:36:24,704 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:24,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:24,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1954613359, now seen corresponding path program 8 times [2024-06-20 16:36:24,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:24,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517773994] [2024-06-20 16:36:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:24,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:25,923 INFO 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 16:36:25,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:25,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517773994] [2024-06-20 16:36:25,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517773994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:25,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:25,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:25,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214078651] [2024-06-20 16:36:25,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:25,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:25,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:25,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:25,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:26,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:26,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 260 transitions, 2593 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:26,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:26,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:26,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:26,545 INFO L124 PetriNetUnfolderBase]: 650/1198 cut-off events. [2024-06-20 16:36:26,545 INFO L125 PetriNetUnfolderBase]: For 143511/143511 co-relation queries the response was YES. [2024-06-20 16:36:26,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7385 conditions, 1198 events. 650/1198 cut-off events. For 143511/143511 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6411 event pairs, 73 based on Foata normal form. 8/1204 useless extension candidates. Maximal degree in co-relation 7255. Up to 866 conditions per place. [2024-06-20 16:36:26,556 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 188 selfloop transitions, 74 changer transitions 14/278 dead transitions. [2024-06-20 16:36:26,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 278 transitions, 3195 flow [2024-06-20 16:36:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:26,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-20 16:36:26,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-20 16:36:26,557 INFO L175 Difference]: Start difference. First operand has 294 places, 260 transitions, 2593 flow. Second operand 11 states and 120 transitions. [2024-06-20 16:36:26,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 278 transitions, 3195 flow [2024-06-20 16:36:26,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 278 transitions, 3035 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:26,974 INFO L231 Difference]: Finished difference. Result has 292 places, 255 transitions, 2538 flow [2024-06-20 16:36:26,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2433, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2538, PETRI_PLACES=292, PETRI_TRANSITIONS=255} [2024-06-20 16:36:26,975 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 262 predicate places. [2024-06-20 16:36:26,975 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 255 transitions, 2538 flow [2024-06-20 16:36:26,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:27,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:27,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:27,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 16:36:27,000 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:27,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:27,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1949256559, now seen corresponding path program 9 times [2024-06-20 16:36:27,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:27,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586623757] [2024-06-20 16:36:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:27,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:28,220 INFO 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 16:36:28,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:28,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586623757] [2024-06-20 16:36:28,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586623757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:28,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:28,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:36:28,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937776548] [2024-06-20 16:36:28,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:28,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:36:28,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:36:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:36:28,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:28,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 255 transitions, 2538 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:28,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:28,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:28,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:28,711 INFO L124 PetriNetUnfolderBase]: 644/1188 cut-off events. [2024-06-20 16:36:28,711 INFO L125 PetriNetUnfolderBase]: For 150696/150696 co-relation queries the response was YES. [2024-06-20 16:36:28,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7304 conditions, 1188 events. 644/1188 cut-off events. For 150696/150696 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 6332 event pairs, 77 based on Foata normal form. 10/1196 useless extension candidates. Maximal degree in co-relation 7175. Up to 834 conditions per place. [2024-06-20 16:36:28,722 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 180 selfloop transitions, 78 changer transitions 13/273 dead transitions. [2024-06-20 16:36:28,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 273 transitions, 3136 flow [2024-06-20 16:36:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:28,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-20 16:36:28,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-20 16:36:28,723 INFO L175 Difference]: Start difference. First operand has 292 places, 255 transitions, 2538 flow. Second operand 10 states and 116 transitions. [2024-06-20 16:36:28,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 273 transitions, 3136 flow [2024-06-20 16:36:29,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 273 transitions, 2982 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:29,061 INFO L231 Difference]: Finished difference. Result has 287 places, 251 transitions, 2518 flow [2024-06-20 16:36:29,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2518, PETRI_PLACES=287, PETRI_TRANSITIONS=251} [2024-06-20 16:36:29,061 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 257 predicate places. [2024-06-20 16:36:29,062 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 251 transitions, 2518 flow [2024-06-20 16:36:29,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:29,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:29,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:29,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 16:36:29,062 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:29,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:29,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1803552807, now seen corresponding path program 10 times [2024-06-20 16:36:29,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:29,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186161666] [2024-06-20 16:36:29,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:29,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:30,157 INFO 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 16:36:30,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:30,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186161666] [2024-06-20 16:36:30,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186161666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:30,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:30,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:36:30,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360480052] [2024-06-20 16:36:30,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:30,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:36:30,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:30,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:36:30,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:36:30,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:30,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 251 transitions, 2518 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:30,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:30,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:30,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:30,569 INFO L124 PetriNetUnfolderBase]: 630/1166 cut-off events. [2024-06-20 16:36:30,569 INFO L125 PetriNetUnfolderBase]: For 135200/135200 co-relation queries the response was YES. [2024-06-20 16:36:30,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7176 conditions, 1166 events. 630/1166 cut-off events. For 135200/135200 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6203 event pairs, 73 based on Foata normal form. 8/1172 useless extension candidates. Maximal degree in co-relation 7049. Up to 814 conditions per place. [2024-06-20 16:36:30,578 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 177 selfloop transitions, 74 changer transitions 15/268 dead transitions. [2024-06-20 16:36:30,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 268 transitions, 3098 flow [2024-06-20 16:36:30,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-20 16:36:30,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36451612903225805 [2024-06-20 16:36:30,579 INFO L175 Difference]: Start difference. First operand has 287 places, 251 transitions, 2518 flow. Second operand 10 states and 113 transitions. [2024-06-20 16:36:30,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 268 transitions, 3098 flow [2024-06-20 16:36:30,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 268 transitions, 2938 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 16:36:30,892 INFO L231 Difference]: Finished difference. Result has 285 places, 245 transitions, 2467 flow [2024-06-20 16:36:30,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2358, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2467, PETRI_PLACES=285, PETRI_TRANSITIONS=245} [2024-06-20 16:36:30,892 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 255 predicate places. [2024-06-20 16:36:30,892 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 245 transitions, 2467 flow [2024-06-20 16:36:30,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:30,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:30,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:30,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 16:36:30,893 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:30,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:30,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1949106829, now seen corresponding path program 11 times [2024-06-20 16:36:30,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:30,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027688396] [2024-06-20 16:36:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:30,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:32,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:32,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027688396] [2024-06-20 16:36:32,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027688396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:32,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:32,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:36:32,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286045314] [2024-06-20 16:36:32,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:32,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:36:32,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:32,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:36:32,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:36:32,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:32,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 245 transitions, 2467 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:32,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:32,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:32,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:32,538 INFO L124 PetriNetUnfolderBase]: 616/1140 cut-off events. [2024-06-20 16:36:32,538 INFO L125 PetriNetUnfolderBase]: For 132477/132477 co-relation queries the response was YES. [2024-06-20 16:36:32,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7059 conditions, 1140 events. 616/1140 cut-off events. For 132477/132477 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6013 event pairs, 71 based on Foata normal form. 8/1146 useless extension candidates. Maximal degree in co-relation 6933. Up to 794 conditions per place. [2024-06-20 16:36:32,549 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 175 selfloop transitions, 70 changer transitions 16/263 dead transitions. [2024-06-20 16:36:32,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 263 transitions, 3039 flow [2024-06-20 16:36:32,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-20 16:36:32,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36451612903225805 [2024-06-20 16:36:32,550 INFO L175 Difference]: Start difference. First operand has 285 places, 245 transitions, 2467 flow. Second operand 10 states and 113 transitions. [2024-06-20 16:36:32,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 263 transitions, 3039 flow [2024-06-20 16:36:32,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 263 transitions, 2883 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:32,846 INFO L231 Difference]: Finished difference. Result has 278 places, 239 transitions, 2395 flow [2024-06-20 16:36:32,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2395, PETRI_PLACES=278, PETRI_TRANSITIONS=239} [2024-06-20 16:36:32,846 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 248 predicate places. [2024-06-20 16:36:32,846 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 239 transitions, 2395 flow [2024-06-20 16:36:32,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:32,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:32,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:32,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 16:36:32,847 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:32,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:32,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1784711991, now seen corresponding path program 12 times [2024-06-20 16:36:32,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:32,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907195647] [2024-06-20 16:36:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:32,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:33,815 INFO 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 16:36:33,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:33,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907195647] [2024-06-20 16:36:33,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907195647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:33,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:33,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:36:33,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167703519] [2024-06-20 16:36:33,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:33,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:36:33,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:33,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:36:33,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:36:33,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:33,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 239 transitions, 2395 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:33,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:33,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:33,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:34,207 INFO L124 PetriNetUnfolderBase]: 606/1122 cut-off events. [2024-06-20 16:36:34,207 INFO L125 PetriNetUnfolderBase]: For 133370/133370 co-relation queries the response was YES. [2024-06-20 16:36:34,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6906 conditions, 1122 events. 606/1122 cut-off events. For 133370/133370 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 5877 event pairs, 98 based on Foata normal form. 10/1130 useless extension candidates. Maximal degree in co-relation 6783. Up to 549 conditions per place. [2024-06-20 16:36:34,217 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 139 selfloop transitions, 101 changer transitions 14/256 dead transitions. [2024-06-20 16:36:34,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 256 transitions, 2955 flow [2024-06-20 16:36:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-20 16:36:34,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-20 16:36:34,218 INFO L175 Difference]: Start difference. First operand has 278 places, 239 transitions, 2395 flow. Second operand 10 states and 115 transitions. [2024-06-20 16:36:34,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 256 transitions, 2955 flow [2024-06-20 16:36:34,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 256 transitions, 2799 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-20 16:36:34,592 INFO L231 Difference]: Finished difference. Result has 270 places, 230 transitions, 2367 flow [2024-06-20 16:36:34,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2367, PETRI_PLACES=270, PETRI_TRANSITIONS=230} [2024-06-20 16:36:34,593 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2024-06-20 16:36:34,593 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 230 transitions, 2367 flow [2024-06-20 16:36:34,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:34,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:34,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:34,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 16:36:34,593 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:34,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:34,594 INFO L85 PathProgramCache]: Analyzing trace with hash 472412429, now seen corresponding path program 13 times [2024-06-20 16:36:34,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:34,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566053933] [2024-06-20 16:36:34,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:34,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:35,790 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 16:36:35,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:35,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566053933] [2024-06-20 16:36:35,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566053933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:35,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:35,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:35,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884994829] [2024-06-20 16:36:35,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:35,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:35,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:35,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:35,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:35,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 230 transitions, 2367 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:35,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:35,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:35,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:36,330 INFO L124 PetriNetUnfolderBase]: 602/1118 cut-off events. [2024-06-20 16:36:36,330 INFO L125 PetriNetUnfolderBase]: For 141266/141266 co-relation queries the response was YES. [2024-06-20 16:36:36,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7405 conditions, 1118 events. 602/1118 cut-off events. For 141266/141266 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 5820 event pairs, 69 based on Foata normal form. 8/1124 useless extension candidates. Maximal degree in co-relation 7285. Up to 375 conditions per place. [2024-06-20 16:36:36,340 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 109 selfloop transitions, 130 changer transitions 17/258 dead transitions. [2024-06-20 16:36:36,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 258 transitions, 3146 flow [2024-06-20 16:36:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-20 16:36:36,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-20 16:36:36,341 INFO L175 Difference]: Start difference. First operand has 270 places, 230 transitions, 2367 flow. Second operand 11 states and 130 transitions. [2024-06-20 16:36:36,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 258 transitions, 3146 flow [2024-06-20 16:36:36,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 258 transitions, 2890 flow, removed 4 selfloop flow, removed 16 redundant places. [2024-06-20 16:36:36,623 INFO L231 Difference]: Finished difference. Result has 261 places, 224 transitions, 2316 flow [2024-06-20 16:36:36,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2116, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2316, PETRI_PLACES=261, PETRI_TRANSITIONS=224} [2024-06-20 16:36:36,623 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 231 predicate places. [2024-06-20 16:36:36,624 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 224 transitions, 2316 flow [2024-06-20 16:36:36,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:36,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:36,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:36,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 16:36:36,624 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:36,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:36,625 INFO L85 PathProgramCache]: Analyzing trace with hash 330289177, now seen corresponding path program 14 times [2024-06-20 16:36:36,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:36,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485552061] [2024-06-20 16:36:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:36,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:37,672 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 16:36:37,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:37,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485552061] [2024-06-20 16:36:37,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485552061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:37,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:37,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:37,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521386894] [2024-06-20 16:36:37,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:37,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:37,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:37,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:37,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:37,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:37,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 224 transitions, 2316 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:37,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:37,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:37,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:38,156 INFO L124 PetriNetUnfolderBase]: 603/1121 cut-off events. [2024-06-20 16:36:38,156 INFO L125 PetriNetUnfolderBase]: For 178831/178831 co-relation queries the response was YES. [2024-06-20 16:36:38,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8202 conditions, 1121 events. 603/1121 cut-off events. For 178831/178831 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5836 event pairs, 86 based on Foata normal form. 8/1127 useless extension candidates. Maximal degree in co-relation 8084. Up to 502 conditions per place. [2024-06-20 16:36:38,167 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 109 selfloop transitions, 130 changer transitions 12/253 dead transitions. [2024-06-20 16:36:38,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 253 transitions, 3090 flow [2024-06-20 16:36:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-20 16:36:38,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-20 16:36:38,168 INFO L175 Difference]: Start difference. First operand has 261 places, 224 transitions, 2316 flow. Second operand 11 states and 135 transitions. [2024-06-20 16:36:38,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 253 transitions, 3090 flow [2024-06-20 16:36:38,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 253 transitions, 2870 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 16:36:38,627 INFO L231 Difference]: Finished difference. Result has 257 places, 220 transitions, 2334 flow [2024-06-20 16:36:38,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2102, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2334, PETRI_PLACES=257, PETRI_TRANSITIONS=220} [2024-06-20 16:36:38,627 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 227 predicate places. [2024-06-20 16:36:38,628 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 220 transitions, 2334 flow [2024-06-20 16:36:38,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:38,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:38,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:38,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 16:36:38,628 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:38,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:38,628 INFO L85 PathProgramCache]: Analyzing trace with hash 330433327, now seen corresponding path program 15 times [2024-06-20 16:36:38,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:38,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162122192] [2024-06-20 16:36:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:38,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:39,636 INFO 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 16:36:39,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:39,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162122192] [2024-06-20 16:36:39,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162122192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:39,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:39,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:39,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756940631] [2024-06-20 16:36:39,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:39,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:39,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:39,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:39,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:39,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:39,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 220 transitions, 2334 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:39,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:39,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:39,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:40,232 INFO L124 PetriNetUnfolderBase]: 591/1101 cut-off events. [2024-06-20 16:36:40,233 INFO L125 PetriNetUnfolderBase]: For 170983/170983 co-relation queries the response was YES. [2024-06-20 16:36:40,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8196 conditions, 1101 events. 591/1101 cut-off events. For 170983/170983 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5717 event pairs, 80 based on Foata normal form. 8/1107 useless extension candidates. Maximal degree in co-relation 8080. Up to 502 conditions per place. [2024-06-20 16:36:40,241 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 107 selfloop transitions, 131 changer transitions 8/248 dead transitions. [2024-06-20 16:36:40,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 248 transitions, 3092 flow [2024-06-20 16:36:40,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:40,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-20 16:36:40,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-20 16:36:40,244 INFO L175 Difference]: Start difference. First operand has 257 places, 220 transitions, 2334 flow. Second operand 11 states and 132 transitions. [2024-06-20 16:36:40,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 248 transitions, 3092 flow [2024-06-20 16:36:40,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 248 transitions, 2751 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:40,735 INFO L231 Difference]: Finished difference. Result has 254 places, 218 transitions, 2248 flow [2024-06-20 16:36:40,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2248, PETRI_PLACES=254, PETRI_TRANSITIONS=218} [2024-06-20 16:36:40,736 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2024-06-20 16:36:40,736 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 218 transitions, 2248 flow [2024-06-20 16:36:40,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:40,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:40,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:40,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 16:36:40,736 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:40,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash 476137079, now seen corresponding path program 16 times [2024-06-20 16:36:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:40,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185863766] [2024-06-20 16:36:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:40,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:41,974 INFO 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 16:36:41,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:41,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185863766] [2024-06-20 16:36:41,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185863766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:41,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:41,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:41,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107386625] [2024-06-20 16:36:41,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:41,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:41,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:41,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:41,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:42,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:42,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 218 transitions, 2248 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:42,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:42,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:42,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:42,510 INFO L124 PetriNetUnfolderBase]: 560/1040 cut-off events. [2024-06-20 16:36:42,510 INFO L125 PetriNetUnfolderBase]: For 133639/133639 co-relation queries the response was YES. [2024-06-20 16:36:42,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7034 conditions, 1040 events. 560/1040 cut-off events. For 133639/133639 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5313 event pairs, 71 based on Foata normal form. 10/1048 useless extension candidates. Maximal degree in co-relation 6920. Up to 502 conditions per place. [2024-06-20 16:36:42,519 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 96 selfloop transitions, 123 changer transitions 20/241 dead transitions. [2024-06-20 16:36:42,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 241 transitions, 2800 flow [2024-06-20 16:36:42,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:42,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-20 16:36:42,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-20 16:36:42,520 INFO L175 Difference]: Start difference. First operand has 254 places, 218 transitions, 2248 flow. Second operand 11 states and 126 transitions. [2024-06-20 16:36:42,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 241 transitions, 2800 flow [2024-06-20 16:36:42,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 241 transitions, 2519 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:42,812 INFO L231 Difference]: Finished difference. Result has 253 places, 209 transitions, 2116 flow [2024-06-20 16:36:42,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1967, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2116, PETRI_PLACES=253, PETRI_TRANSITIONS=209} [2024-06-20 16:36:42,812 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 223 predicate places. [2024-06-20 16:36:42,813 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 209 transitions, 2116 flow [2024-06-20 16:36:42,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:42,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:42,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:42,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 16:36:42,813 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:42,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:42,813 INFO L85 PathProgramCache]: Analyzing trace with hash 468817327, now seen corresponding path program 17 times [2024-06-20 16:36:42,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:42,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786301401] [2024-06-20 16:36:42,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:42,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:43,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:43,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786301401] [2024-06-20 16:36:43,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786301401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:43,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:43,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:36:43,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148970931] [2024-06-20 16:36:43,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:43,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:36:43,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:43,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:36:43,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:36:43,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:43,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 209 transitions, 2116 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:43,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:43,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:43,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:44,277 INFO L124 PetriNetUnfolderBase]: 537/993 cut-off events. [2024-06-20 16:36:44,277 INFO L125 PetriNetUnfolderBase]: For 123233/123233 co-relation queries the response was YES. [2024-06-20 16:36:44,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6703 conditions, 993 events. 537/993 cut-off events. For 123233/123233 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4982 event pairs, 63 based on Foata normal form. 8/999 useless extension candidates. Maximal degree in co-relation 6591. Up to 283 conditions per place. [2024-06-20 16:36:44,286 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 97 selfloop transitions, 121 changer transitions 13/233 dead transitions. [2024-06-20 16:36:44,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 233 transitions, 2820 flow [2024-06-20 16:36:44,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-20 16:36:44,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-20 16:36:44,287 INFO L175 Difference]: Start difference. First operand has 253 places, 209 transitions, 2116 flow. Second operand 10 states and 118 transitions. [2024-06-20 16:36:44,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 233 transitions, 2820 flow [2024-06-20 16:36:44,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 233 transitions, 2488 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-06-20 16:36:44,525 INFO L231 Difference]: Finished difference. Result has 239 places, 203 transitions, 1986 flow [2024-06-20 16:36:44,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1986, PETRI_PLACES=239, PETRI_TRANSITIONS=203} [2024-06-20 16:36:44,525 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2024-06-20 16:36:44,525 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 203 transitions, 1986 flow [2024-06-20 16:36:44,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:44,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:44,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:44,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 16:36:44,526 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:44,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:44,526 INFO L85 PathProgramCache]: Analyzing trace with hash 614659649, now seen corresponding path program 18 times [2024-06-20 16:36:44,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:44,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785418774] [2024-06-20 16:36:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:44,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:45,616 INFO 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 16:36:45,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:45,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785418774] [2024-06-20 16:36:45,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785418774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:45,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:45,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:36:45,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565027257] [2024-06-20 16:36:45,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:45,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:36:45,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:45,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:36:45,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:36:45,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:45,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 203 transitions, 1986 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:45,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:45,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:45,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:46,157 INFO L124 PetriNetUnfolderBase]: 546/1016 cut-off events. [2024-06-20 16:36:46,158 INFO L125 PetriNetUnfolderBase]: For 159218/159218 co-relation queries the response was YES. [2024-06-20 16:36:46,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7482 conditions, 1016 events. 546/1016 cut-off events. For 159218/159218 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5154 event pairs, 70 based on Foata normal form. 8/1022 useless extension candidates. Maximal degree in co-relation 7373. Up to 440 conditions per place. [2024-06-20 16:36:46,166 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 97 selfloop transitions, 121 changer transitions 9/229 dead transitions. [2024-06-20 16:36:46,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 229 transitions, 2694 flow [2024-06-20 16:36:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-20 16:36:46,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-20 16:36:46,167 INFO L175 Difference]: Start difference. First operand has 239 places, 203 transitions, 1986 flow. Second operand 10 states and 122 transitions. [2024-06-20 16:36:46,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 229 transitions, 2694 flow [2024-06-20 16:36:46,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 229 transitions, 2481 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:46,500 INFO L231 Difference]: Finished difference. Result has 234 places, 199 transitions, 1993 flow [2024-06-20 16:36:46,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1993, PETRI_PLACES=234, PETRI_TRANSITIONS=199} [2024-06-20 16:36:46,501 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 204 predicate places. [2024-06-20 16:36:46,501 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 199 transitions, 1993 flow [2024-06-20 16:36:46,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:46,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:46,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:46,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 16:36:46,502 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:46,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash 614665229, now seen corresponding path program 19 times [2024-06-20 16:36:46,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:46,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245097425] [2024-06-20 16:36:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:46,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:47,768 INFO 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 16:36:47,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:47,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245097425] [2024-06-20 16:36:47,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245097425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:47,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:47,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:47,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030893674] [2024-06-20 16:36:47,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:47,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:47,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:47,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:47,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:47,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:47,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 199 transitions, 1993 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:47,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:47,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:47,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:48,401 INFO L124 PetriNetUnfolderBase]: 552/1034 cut-off events. [2024-06-20 16:36:48,401 INFO L125 PetriNetUnfolderBase]: For 161827/161827 co-relation queries the response was YES. [2024-06-20 16:36:48,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7593 conditions, 1034 events. 552/1034 cut-off events. For 161827/161827 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5318 event pairs, 84 based on Foata normal form. 12/1044 useless extension candidates. Maximal degree in co-relation 7487. Up to 507 conditions per place. [2024-06-20 16:36:48,411 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 110 selfloop transitions, 104 changer transitions 15/231 dead transitions. [2024-06-20 16:36:48,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 231 transitions, 2597 flow [2024-06-20 16:36:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:36:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:36:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 143 transitions. [2024-06-20 16:36:48,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:36:48,412 INFO L175 Difference]: Start difference. First operand has 234 places, 199 transitions, 1993 flow. Second operand 13 states and 143 transitions. [2024-06-20 16:36:48,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 231 transitions, 2597 flow [2024-06-20 16:36:48,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 231 transitions, 2345 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:48,728 INFO L231 Difference]: Finished difference. Result has 236 places, 198 transitions, 1973 flow [2024-06-20 16:36:48,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1973, PETRI_PLACES=236, PETRI_TRANSITIONS=198} [2024-06-20 16:36:48,728 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 206 predicate places. [2024-06-20 16:36:48,728 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 198 transitions, 1973 flow [2024-06-20 16:36:48,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:48,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:48,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:48,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 16:36:48,729 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:48,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:48,729 INFO L85 PathProgramCache]: Analyzing trace with hash 620229419, now seen corresponding path program 20 times [2024-06-20 16:36:48,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:48,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891443745] [2024-06-20 16:36:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:48,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:50,021 INFO 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 16:36:50,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:50,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891443745] [2024-06-20 16:36:50,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891443745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:50,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:50,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:50,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998943943] [2024-06-20 16:36:50,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:50,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:50,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:50,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:50,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:50,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:50,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 198 transitions, 1973 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:50,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:50,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:50,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:50,603 INFO L124 PetriNetUnfolderBase]: 538/1008 cut-off events. [2024-06-20 16:36:50,603 INFO L125 PetriNetUnfolderBase]: For 147543/147543 co-relation queries the response was YES. [2024-06-20 16:36:50,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7383 conditions, 1008 events. 538/1008 cut-off events. For 147543/147543 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5146 event pairs, 86 based on Foata normal form. 10/1016 useless extension candidates. Maximal degree in co-relation 7277. Up to 672 conditions per place. [2024-06-20 16:36:50,611 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 128 selfloop transitions, 79 changer transitions 11/220 dead transitions. [2024-06-20 16:36:50,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 220 transitions, 2479 flow [2024-06-20 16:36:50,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:50,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-20 16:36:50,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-20 16:36:50,613 INFO L175 Difference]: Start difference. First operand has 236 places, 198 transitions, 1973 flow. Second operand 11 states and 123 transitions. [2024-06-20 16:36:50,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 220 transitions, 2479 flow [2024-06-20 16:36:50,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 220 transitions, 2240 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-20 16:36:50,869 INFO L231 Difference]: Finished difference. Result has 234 places, 195 transitions, 1870 flow [2024-06-20 16:36:50,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1734, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1870, PETRI_PLACES=234, PETRI_TRANSITIONS=195} [2024-06-20 16:36:50,870 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 204 predicate places. [2024-06-20 16:36:50,870 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 195 transitions, 1870 flow [2024-06-20 16:36:50,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:50,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:50,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:50,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 16:36:50,870 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:50,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:50,871 INFO L85 PathProgramCache]: Analyzing trace with hash 620027609, now seen corresponding path program 21 times [2024-06-20 16:36:50,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:50,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403284976] [2024-06-20 16:36:50,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:50,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:52,015 INFO 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 16:36:52,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:52,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403284976] [2024-06-20 16:36:52,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403284976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:52,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:52,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:52,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728211156] [2024-06-20 16:36:52,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:52,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:52,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:52,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:52,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:52,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:52,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 195 transitions, 1870 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:52,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:52,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:52,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:52,484 INFO L124 PetriNetUnfolderBase]: 528/994 cut-off events. [2024-06-20 16:36:52,484 INFO L125 PetriNetUnfolderBase]: For 151029/151029 co-relation queries the response was YES. [2024-06-20 16:36:52,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7220 conditions, 994 events. 528/994 cut-off events. For 151029/151029 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5078 event pairs, 86 based on Foata normal form. 10/1002 useless extension candidates. Maximal degree in co-relation 7115. Up to 652 conditions per place. [2024-06-20 16:36:52,492 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 124 selfloop transitions, 79 changer transitions 12/217 dead transitions. [2024-06-20 16:36:52,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 217 transitions, 2370 flow [2024-06-20 16:36:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-20 16:36:52,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-20 16:36:52,493 INFO L175 Difference]: Start difference. First operand has 234 places, 195 transitions, 1870 flow. Second operand 11 states and 124 transitions. [2024-06-20 16:36:52,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 217 transitions, 2370 flow [2024-06-20 16:36:52,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 217 transitions, 2208 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:52,731 INFO L231 Difference]: Finished difference. Result has 232 places, 191 transitions, 1838 flow [2024-06-20 16:36:52,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1708, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1838, PETRI_PLACES=232, PETRI_TRANSITIONS=191} [2024-06-20 16:36:52,732 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 202 predicate places. [2024-06-20 16:36:52,732 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 191 transitions, 1838 flow [2024-06-20 16:36:52,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:52,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:52,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:52,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 16:36:52,732 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:52,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1659261067, now seen corresponding path program 22 times [2024-06-20 16:36:52,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:52,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345110987] [2024-06-20 16:36:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:52,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:54,005 INFO 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 16:36:54,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:54,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345110987] [2024-06-20 16:36:54,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345110987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:54,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:54,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:54,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264122715] [2024-06-20 16:36:54,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:54,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:54,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:54,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:54,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:54,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:54,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 191 transitions, 1838 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:54,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:54,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:54,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:54,502 INFO L124 PetriNetUnfolderBase]: 514/972 cut-off events. [2024-06-20 16:36:54,502 INFO L125 PetriNetUnfolderBase]: For 140925/140925 co-relation queries the response was YES. [2024-06-20 16:36:54,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7085 conditions, 972 events. 514/972 cut-off events. For 140925/140925 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4947 event pairs, 82 based on Foata normal form. 8/978 useless extension candidates. Maximal degree in co-relation 6981. Up to 626 conditions per place. [2024-06-20 16:36:54,510 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 122 selfloop transitions, 76 changer transitions 13/213 dead transitions. [2024-06-20 16:36:54,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 213 transitions, 2324 flow [2024-06-20 16:36:54,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:54,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:54,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-20 16:36:54,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-20 16:36:54,511 INFO L175 Difference]: Start difference. First operand has 232 places, 191 transitions, 1838 flow. Second operand 11 states and 123 transitions. [2024-06-20 16:36:54,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 213 transitions, 2324 flow [2024-06-20 16:36:54,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 213 transitions, 2162 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:54,766 INFO L231 Difference]: Finished difference. Result has 230 places, 185 transitions, 1779 flow [2024-06-20 16:36:54,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1779, PETRI_PLACES=230, PETRI_TRANSITIONS=185} [2024-06-20 16:36:54,767 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 200 predicate places. [2024-06-20 16:36:54,767 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 185 transitions, 1779 flow [2024-06-20 16:36:54,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:54,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:54,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:54,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 16:36:54,768 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:54,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:54,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1526543151, now seen corresponding path program 23 times [2024-06-20 16:36:54,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:54,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447489974] [2024-06-20 16:36:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:54,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:56,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:56,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447489974] [2024-06-20 16:36:56,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447489974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:56,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:56,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:56,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191637025] [2024-06-20 16:36:56,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:56,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:56,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:56,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:56,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:56,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:56,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 185 transitions, 1779 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:56,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:56,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:56,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:56,755 INFO L124 PetriNetUnfolderBase]: 529/1005 cut-off events. [2024-06-20 16:36:56,755 INFO L125 PetriNetUnfolderBase]: For 168609/168609 co-relation queries the response was YES. [2024-06-20 16:36:56,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7878 conditions, 1005 events. 529/1005 cut-off events. For 168609/168609 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5171 event pairs, 97 based on Foata normal form. 8/1011 useless extension candidates. Maximal degree in co-relation 7775. Up to 564 conditions per place. [2024-06-20 16:36:56,763 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 128 selfloop transitions, 70 changer transitions 9/209 dead transitions. [2024-06-20 16:36:56,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 209 transitions, 2425 flow [2024-06-20 16:36:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:56,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-20 16:36:56,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-20 16:36:56,765 INFO L175 Difference]: Start difference. First operand has 230 places, 185 transitions, 1779 flow. Second operand 11 states and 127 transitions. [2024-06-20 16:36:56,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 209 transitions, 2425 flow [2024-06-20 16:36:57,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 209 transitions, 2261 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-20 16:36:57,118 INFO L231 Difference]: Finished difference. Result has 226 places, 181 transitions, 1729 flow [2024-06-20 16:36:57,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1729, PETRI_PLACES=226, PETRI_TRANSITIONS=181} [2024-06-20 16:36:57,132 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 196 predicate places. [2024-06-20 16:36:57,132 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 181 transitions, 1729 flow [2024-06-20 16:36:57,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:57,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:57,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:57,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 16:36:57,133 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:57,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:57,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1534167787, now seen corresponding path program 1 times [2024-06-20 16:36:57,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:57,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635841200] [2024-06-20 16:36:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:57,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:58,657 INFO 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 16:36:58,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:58,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635841200] [2024-06-20 16:36:58,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635841200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:58,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:58,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:36:58,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145516247] [2024-06-20 16:36:58,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:58,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:36:58,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:58,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:36:58,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:36:58,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:58,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 181 transitions, 1729 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:58,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:58,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:58,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:59,134 INFO L124 PetriNetUnfolderBase]: 509/965 cut-off events. [2024-06-20 16:36:59,134 INFO L125 PetriNetUnfolderBase]: For 142409/142409 co-relation queries the response was YES. [2024-06-20 16:36:59,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7680 conditions, 965 events. 509/965 cut-off events. For 142409/142409 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4886 event pairs, 99 based on Foata normal form. 2/965 useless extension candidates. Maximal degree in co-relation 7579. Up to 673 conditions per place. [2024-06-20 16:36:59,142 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 122 selfloop transitions, 71 changer transitions 0/195 dead transitions. [2024-06-20 16:36:59,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 195 transitions, 2169 flow [2024-06-20 16:36:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-20 16:36:59,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-20 16:36:59,143 INFO L175 Difference]: Start difference. First operand has 226 places, 181 transitions, 1729 flow. Second operand 10 states and 109 transitions. [2024-06-20 16:36:59,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 195 transitions, 2169 flow [2024-06-20 16:36:59,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 195 transitions, 2031 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:59,426 INFO L231 Difference]: Finished difference. Result has 224 places, 182 transitions, 1759 flow [2024-06-20 16:36:59,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1759, PETRI_PLACES=224, PETRI_TRANSITIONS=182} [2024-06-20 16:36:59,426 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2024-06-20 16:36:59,426 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 182 transitions, 1759 flow [2024-06-20 16:36:59,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:59,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:59,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:59,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 16:36:59,427 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:59,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:59,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1679875259, now seen corresponding path program 2 times [2024-06-20 16:36:59,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:59,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949710054] [2024-06-20 16:36:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:59,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:00,635 INFO 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 16:37:00,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:00,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949710054] [2024-06-20 16:37:00,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949710054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:00,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:00,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:37:00,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526575795] [2024-06-20 16:37:00,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:00,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:37:00,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:00,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:37:00,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:37:00,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:00,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 182 transitions, 1759 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:00,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:00,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:00,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:01,047 INFO L124 PetriNetUnfolderBase]: 520/986 cut-off events. [2024-06-20 16:37:01,048 INFO L125 PetriNetUnfolderBase]: For 145024/145024 co-relation queries the response was YES. [2024-06-20 16:37:01,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7963 conditions, 986 events. 520/986 cut-off events. For 145024/145024 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5057 event pairs, 102 based on Foata normal form. 2/986 useless extension candidates. Maximal degree in co-relation 7863. Up to 647 conditions per place. [2024-06-20 16:37:01,054 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 121 selfloop transitions, 75 changer transitions 0/198 dead transitions. [2024-06-20 16:37:01,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 198 transitions, 2381 flow [2024-06-20 16:37:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-20 16:37:01,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:37:01,055 INFO L175 Difference]: Start difference. First operand has 224 places, 182 transitions, 1759 flow. Second operand 10 states and 110 transitions. [2024-06-20 16:37:01,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 198 transitions, 2381 flow [2024-06-20 16:37:01,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 198 transitions, 2223 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 16:37:01,295 INFO L231 Difference]: Finished difference. Result has 226 places, 184 transitions, 1802 flow [2024-06-20 16:37:01,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1802, PETRI_PLACES=226, PETRI_TRANSITIONS=184} [2024-06-20 16:37:01,296 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 196 predicate places. [2024-06-20 16:37:01,296 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 184 transitions, 1802 flow [2024-06-20 16:37:01,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:01,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:01,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:01,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 16:37:01,297 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:01,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:01,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1327246941, now seen corresponding path program 24 times [2024-06-20 16:37:01,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:01,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756594223] [2024-06-20 16:37:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:01,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:02,502 INFO 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 16:37:02,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:02,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756594223] [2024-06-20 16:37:02,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756594223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:02,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:02,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:37:02,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236135324] [2024-06-20 16:37:02,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:02,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:37:02,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:02,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:37:02,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:37:02,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:02,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 184 transitions, 1802 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:02,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:02,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:02,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:03,046 INFO L124 PetriNetUnfolderBase]: 507/963 cut-off events. [2024-06-20 16:37:03,047 INFO L125 PetriNetUnfolderBase]: For 142821/142821 co-relation queries the response was YES. [2024-06-20 16:37:03,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7186 conditions, 963 events. 507/963 cut-off events. For 142821/142821 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4908 event pairs, 83 based on Foata normal form. 10/971 useless extension candidates. Maximal degree in co-relation 7085. Up to 484 conditions per place. [2024-06-20 16:37:03,054 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 84 selfloop transitions, 101 changer transitions 18/205 dead transitions. [2024-06-20 16:37:03,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 205 transitions, 2276 flow [2024-06-20 16:37:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:03,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-20 16:37:03,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-20 16:37:03,055 INFO L175 Difference]: Start difference. First operand has 226 places, 184 transitions, 1802 flow. Second operand 10 states and 116 transitions. [2024-06-20 16:37:03,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 205 transitions, 2276 flow [2024-06-20 16:37:03,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 205 transitions, 2157 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 16:37:03,315 INFO L231 Difference]: Finished difference. Result has 230 places, 175 transitions, 1804 flow [2024-06-20 16:37:03,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1804, PETRI_PLACES=230, PETRI_TRANSITIONS=175} [2024-06-20 16:37:03,316 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 200 predicate places. [2024-06-20 16:37:03,316 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 175 transitions, 1804 flow [2024-06-20 16:37:03,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:03,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:03,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:03,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 16:37:03,317 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:03,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:03,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1526758477, now seen corresponding path program 3 times [2024-06-20 16:37:03,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:03,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635766126] [2024-06-20 16:37:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:03,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:04,677 INFO 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 16:37:04,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:04,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635766126] [2024-06-20 16:37:04,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635766126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:04,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:04,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:37:04,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807806021] [2024-06-20 16:37:04,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:04,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:37:04,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:04,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:37:04,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:37:04,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:04,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 175 transitions, 1804 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:04,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:04,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:04,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:05,136 INFO L124 PetriNetUnfolderBase]: 479/907 cut-off events. [2024-06-20 16:37:05,137 INFO L125 PetriNetUnfolderBase]: For 122304/122304 co-relation queries the response was YES. [2024-06-20 16:37:05,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7184 conditions, 907 events. 479/907 cut-off events. For 122304/122304 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4540 event pairs, 85 based on Foata normal form. 2/907 useless extension candidates. Maximal degree in co-relation 7081. Up to 615 conditions per place. [2024-06-20 16:37:05,144 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 124 selfloop transitions, 64 changer transitions 0/190 dead transitions. [2024-06-20 16:37:05,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 190 transitions, 2240 flow [2024-06-20 16:37:05,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:05,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-20 16:37:05,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-20 16:37:05,146 INFO L175 Difference]: Start difference. First operand has 230 places, 175 transitions, 1804 flow. Second operand 10 states and 109 transitions. [2024-06-20 16:37:05,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 190 transitions, 2240 flow [2024-06-20 16:37:05,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 190 transitions, 2012 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-20 16:37:05,402 INFO L231 Difference]: Finished difference. Result has 220 places, 176 transitions, 1732 flow [2024-06-20 16:37:05,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1732, PETRI_PLACES=220, PETRI_TRANSITIONS=176} [2024-06-20 16:37:05,402 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 190 predicate places. [2024-06-20 16:37:05,402 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 176 transitions, 1732 flow [2024-06-20 16:37:05,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:05,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:05,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:05,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 16:37:05,403 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:05,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:05,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1332603741, now seen corresponding path program 25 times [2024-06-20 16:37:05,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:05,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143830618] [2024-06-20 16:37:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:05,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:37:06,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:06,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143830618] [2024-06-20 16:37:06,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143830618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:06,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:06,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:06,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981872064] [2024-06-20 16:37:06,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:06,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:06,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:06,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:06,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:06,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:06,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 176 transitions, 1732 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:06,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:06,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:06,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:07,050 INFO L124 PetriNetUnfolderBase]: 520/994 cut-off events. [2024-06-20 16:37:07,051 INFO L125 PetriNetUnfolderBase]: For 162321/162321 co-relation queries the response was YES. [2024-06-20 16:37:07,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7968 conditions, 994 events. 520/994 cut-off events. For 162321/162321 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5109 event pairs, 98 based on Foata normal form. 8/1000 useless extension candidates. Maximal degree in co-relation 7868. Up to 567 conditions per place. [2024-06-20 16:37:07,059 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 127 selfloop transitions, 63 changer transitions 9/201 dead transitions. [2024-06-20 16:37:07,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 201 transitions, 2360 flow [2024-06-20 16:37:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-20 16:37:07,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-20 16:37:07,061 INFO L175 Difference]: Start difference. First operand has 220 places, 176 transitions, 1732 flow. Second operand 11 states and 128 transitions. [2024-06-20 16:37:07,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 201 transitions, 2360 flow [2024-06-20 16:37:07,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 201 transitions, 2216 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 16:37:07,348 INFO L231 Difference]: Finished difference. Result has 223 places, 172 transitions, 1682 flow [2024-06-20 16:37:07,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1682, PETRI_PLACES=223, PETRI_TRANSITIONS=172} [2024-06-20 16:37:07,349 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 193 predicate places. [2024-06-20 16:37:07,349 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 172 transitions, 1682 flow [2024-06-20 16:37:07,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:07,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:07,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:07,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 16:37:07,349 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:07,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:07,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1526548731, now seen corresponding path program 26 times [2024-06-20 16:37:07,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:07,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881446755] [2024-06-20 16:37:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:07,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:08,627 INFO 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 16:37:08,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:08,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881446755] [2024-06-20 16:37:08,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881446755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:08,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:08,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:08,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685535959] [2024-06-20 16:37:08,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:08,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:08,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:08,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:08,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:08,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:08,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 172 transitions, 1682 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:08,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:08,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:08,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:09,179 INFO L124 PetriNetUnfolderBase]: 512/982 cut-off events. [2024-06-20 16:37:09,179 INFO L125 PetriNetUnfolderBase]: For 172333/172333 co-relation queries the response was YES. [2024-06-20 16:37:09,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7923 conditions, 982 events. 512/982 cut-off events. For 172333/172333 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5067 event pairs, 96 based on Foata normal form. 10/990 useless extension candidates. Maximal degree in co-relation 7822. Up to 624 conditions per place. [2024-06-20 16:37:09,188 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 113 selfloop transitions, 63 changer transitions 14/192 dead transitions. [2024-06-20 16:37:09,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 192 transitions, 2124 flow [2024-06-20 16:37:09,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-20 16:37:09,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-20 16:37:09,189 INFO L175 Difference]: Start difference. First operand has 223 places, 172 transitions, 1682 flow. Second operand 11 states and 122 transitions. [2024-06-20 16:37:09,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 192 transitions, 2124 flow [2024-06-20 16:37:09,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 192 transitions, 1992 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-20 16:37:09,451 INFO L231 Difference]: Finished difference. Result has 220 places, 166 transitions, 1627 flow [2024-06-20 16:37:09,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1627, PETRI_PLACES=220, PETRI_TRANSITIONS=166} [2024-06-20 16:37:09,451 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 190 predicate places. [2024-06-20 16:37:09,451 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 166 transitions, 1627 flow [2024-06-20 16:37:09,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:09,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:09,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:09,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 16:37:09,452 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:09,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:09,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1526750541, now seen corresponding path program 27 times [2024-06-20 16:37:09,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:09,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389781868] [2024-06-20 16:37:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:09,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:10,723 INFO 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 16:37:10,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:10,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389781868] [2024-06-20 16:37:10,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389781868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:10,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:10,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:10,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341607781] [2024-06-20 16:37:10,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:10,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:10,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:10,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:10,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:10,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:10,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 166 transitions, 1627 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:10,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:10,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:10,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:11,184 INFO L124 PetriNetUnfolderBase]: 500/962 cut-off events. [2024-06-20 16:37:11,184 INFO L125 PetriNetUnfolderBase]: For 167887/167887 co-relation queries the response was YES. [2024-06-20 16:37:11,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7776 conditions, 962 events. 500/962 cut-off events. For 167887/167887 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4941 event pairs, 96 based on Foata normal form. 10/970 useless extension candidates. Maximal degree in co-relation 7676. Up to 626 conditions per place. [2024-06-20 16:37:11,192 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 113 selfloop transitions, 60 changer transitions 11/186 dead transitions. [2024-06-20 16:37:11,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 186 transitions, 2057 flow [2024-06-20 16:37:11,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-20 16:37:11,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:37:11,193 INFO L175 Difference]: Start difference. First operand has 220 places, 166 transitions, 1627 flow. Second operand 11 states and 121 transitions. [2024-06-20 16:37:11,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 186 transitions, 2057 flow [2024-06-20 16:37:11,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 186 transitions, 1925 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-20 16:37:11,419 INFO L231 Difference]: Finished difference. Result has 216 places, 163 transitions, 1590 flow [2024-06-20 16:37:11,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1590, PETRI_PLACES=216, PETRI_TRANSITIONS=163} [2024-06-20 16:37:11,419 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2024-06-20 16:37:11,420 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 163 transitions, 1590 flow [2024-06-20 16:37:11,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:11,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:11,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:11,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 16:37:11,420 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:11,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:11,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1533900381, now seen corresponding path program 28 times [2024-06-20 16:37:11,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:11,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537386896] [2024-06-20 16:37:11,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:11,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:12,706 INFO 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 16:37:12,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:12,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537386896] [2024-06-20 16:37:12,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537386896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:12,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:12,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:12,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435477864] [2024-06-20 16:37:12,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:12,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:12,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:12,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:12,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:12,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:12,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 163 transitions, 1590 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:12,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:12,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:12,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:13,145 INFO L124 PetriNetUnfolderBase]: 461/889 cut-off events. [2024-06-20 16:37:13,145 INFO L125 PetriNetUnfolderBase]: For 131799/131799 co-relation queries the response was YES. [2024-06-20 16:37:13,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6694 conditions, 889 events. 461/889 cut-off events. For 131799/131799 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4465 event pairs, 89 based on Foata normal form. 10/897 useless extension candidates. Maximal degree in co-relation 6596. Up to 553 conditions per place. [2024-06-20 16:37:13,153 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 106 selfloop transitions, 63 changer transitions 11/182 dead transitions. [2024-06-20 16:37:13,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 182 transitions, 2008 flow [2024-06-20 16:37:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:13,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-20 16:37:13,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3489736070381232 [2024-06-20 16:37:13,154 INFO L175 Difference]: Start difference. First operand has 216 places, 163 transitions, 1590 flow. Second operand 11 states and 119 transitions. [2024-06-20 16:37:13,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 182 transitions, 2008 flow [2024-06-20 16:37:13,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 182 transitions, 1884 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:37:13,364 INFO L231 Difference]: Finished difference. Result has 214 places, 160 transitions, 1567 flow [2024-06-20 16:37:13,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1567, PETRI_PLACES=214, PETRI_TRANSITIONS=160} [2024-06-20 16:37:13,372 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 184 predicate places. [2024-06-20 16:37:13,372 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 160 transitions, 1567 flow [2024-06-20 16:37:13,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:13,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:13,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:13,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 16:37:13,373 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:13,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:13,373 INFO L85 PathProgramCache]: Analyzing trace with hash 880861307, now seen corresponding path program 29 times [2024-06-20 16:37:13,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:13,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213233084] [2024-06-20 16:37:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:13,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:14,557 INFO 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 16:37:14,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:14,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213233084] [2024-06-20 16:37:14,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213233084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:14,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:14,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:14,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198240067] [2024-06-20 16:37:14,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:14,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:14,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:14,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:14,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:14,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:14,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 160 transitions, 1567 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:14,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:14,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:14,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:14,973 INFO L124 PetriNetUnfolderBase]: 451/875 cut-off events. [2024-06-20 16:37:14,973 INFO L125 PetriNetUnfolderBase]: For 128280/128280 co-relation queries the response was YES. [2024-06-20 16:37:14,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6579 conditions, 875 events. 451/875 cut-off events. For 128280/128280 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4407 event pairs, 83 based on Foata normal form. 10/883 useless extension candidates. Maximal degree in co-relation 6482. Up to 525 conditions per place. [2024-06-20 16:37:14,980 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 110 selfloop transitions, 55 changer transitions 14/181 dead transitions. [2024-06-20 16:37:14,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 181 transitions, 1991 flow [2024-06-20 16:37:14,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-20 16:37:14,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-20 16:37:14,981 INFO L175 Difference]: Start difference. First operand has 214 places, 160 transitions, 1567 flow. Second operand 11 states and 124 transitions. [2024-06-20 16:37:14,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 181 transitions, 1991 flow [2024-06-20 16:37:15,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 181 transitions, 1861 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:37:15,178 INFO L231 Difference]: Finished difference. Result has 211 places, 154 transitions, 1498 flow [2024-06-20 16:37:15,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1498, PETRI_PLACES=211, PETRI_TRANSITIONS=154} [2024-06-20 16:37:15,179 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-06-20 16:37:15,179 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 154 transitions, 1498 flow [2024-06-20 16:37:15,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:15,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:15,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:15,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 16:37:15,179 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:15,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:15,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1332819067, now seen corresponding path program 4 times [2024-06-20 16:37:15,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:15,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497574583] [2024-06-20 16:37:15,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:15,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:16,375 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 16:37:16,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:16,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497574583] [2024-06-20 16:37:16,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497574583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:16,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:16,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:16,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893296261] [2024-06-20 16:37:16,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:16,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:16,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:16,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:16,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:16,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:16,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 154 transitions, 1498 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:16,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:16,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:16,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:16,750 INFO L124 PetriNetUnfolderBase]: 420/814 cut-off events. [2024-06-20 16:37:16,750 INFO L125 PetriNetUnfolderBase]: For 98877/98877 co-relation queries the response was YES. [2024-06-20 16:37:16,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6142 conditions, 814 events. 420/814 cut-off events. For 98877/98877 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4000 event pairs, 84 based on Foata normal form. 2/814 useless extension candidates. Maximal degree in co-relation 6046. Up to 522 conditions per place. [2024-06-20 16:37:16,757 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 110 selfloop transitions, 56 changer transitions 0/168 dead transitions. [2024-06-20 16:37:16,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 168 transitions, 1868 flow [2024-06-20 16:37:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-20 16:37:16,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-20 16:37:16,759 INFO L175 Difference]: Start difference. First operand has 211 places, 154 transitions, 1498 flow. Second operand 10 states and 108 transitions. [2024-06-20 16:37:16,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 168 transitions, 1868 flow [2024-06-20 16:37:16,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 168 transitions, 1731 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-20 16:37:16,957 INFO L231 Difference]: Finished difference. Result has 204 places, 154 transitions, 1477 flow [2024-06-20 16:37:16,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1477, PETRI_PLACES=204, PETRI_TRANSITIONS=154} [2024-06-20 16:37:16,963 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2024-06-20 16:37:16,963 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 154 transitions, 1477 flow [2024-06-20 16:37:16,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:16,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:16,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:16,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 16:37:16,963 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:16,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:16,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1332811131, now seen corresponding path program 30 times [2024-06-20 16:37:16,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:16,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440995330] [2024-06-20 16:37:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:16,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:18,337 INFO 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 16:37:18,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:18,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440995330] [2024-06-20 16:37:18,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440995330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:18,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:18,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:18,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54451916] [2024-06-20 16:37:18,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:18,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:18,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:18,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:18,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:18,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:18,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 154 transitions, 1477 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:18,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:18,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:18,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:18,752 INFO L124 PetriNetUnfolderBase]: 407/791 cut-off events. [2024-06-20 16:37:18,753 INFO L125 PetriNetUnfolderBase]: For 88361/88361 co-relation queries the response was YES. [2024-06-20 16:37:18,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5288 conditions, 791 events. 407/791 cut-off events. For 88361/88361 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3859 event pairs, 71 based on Foata normal form. 10/799 useless extension candidates. Maximal degree in co-relation 5194. Up to 455 conditions per place. [2024-06-20 16:37:18,759 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 107 selfloop transitions, 54 changer transitions 11/174 dead transitions. [2024-06-20 16:37:18,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 174 transitions, 1883 flow [2024-06-20 16:37:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:18,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:18,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-20 16:37:18,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-20 16:37:18,760 INFO L175 Difference]: Start difference. First operand has 204 places, 154 transitions, 1477 flow. Second operand 11 states and 120 transitions. [2024-06-20 16:37:18,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 174 transitions, 1883 flow [2024-06-20 16:37:18,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 174 transitions, 1752 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 16:37:18,953 INFO L231 Difference]: Finished difference. Result has 206 places, 151 transitions, 1429 flow [2024-06-20 16:37:18,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1429, PETRI_PLACES=206, PETRI_TRANSITIONS=151} [2024-06-20 16:37:18,954 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 176 predicate places. [2024-06-20 16:37:18,954 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 151 transitions, 1429 flow [2024-06-20 16:37:18,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:18,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:18,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:18,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 16:37:18,954 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:18,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:18,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1964634083, now seen corresponding path program 5 times [2024-06-20 16:37:18,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:18,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180958519] [2024-06-20 16:37:18,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:18,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:20,045 INFO 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 16:37:20,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:20,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180958519] [2024-06-20 16:37:20,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180958519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:20,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:20,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:20,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728936379] [2024-06-20 16:37:20,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:20,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:20,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:20,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:20,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:20,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:20,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 151 transitions, 1429 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:20,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:20,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:20,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:20,344 INFO L124 PetriNetUnfolderBase]: 378/736 cut-off events. [2024-06-20 16:37:20,344 INFO L125 PetriNetUnfolderBase]: For 65617/65617 co-relation queries the response was YES. [2024-06-20 16:37:20,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4929 conditions, 736 events. 378/736 cut-off events. For 65617/65617 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3529 event pairs, 72 based on Foata normal form. 2/736 useless extension candidates. Maximal degree in co-relation 4834. Up to 689 conditions per place. [2024-06-20 16:37:20,350 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 146 selfloop transitions, 16 changer transitions 0/164 dead transitions. [2024-06-20 16:37:20,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 164 transitions, 1803 flow [2024-06-20 16:37:20,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:20,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:20,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 96 transitions. [2024-06-20 16:37:20,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3096774193548387 [2024-06-20 16:37:20,356 INFO L175 Difference]: Start difference. First operand has 206 places, 151 transitions, 1429 flow. Second operand 10 states and 96 transitions. [2024-06-20 16:37:20,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 164 transitions, 1803 flow [2024-06-20 16:37:20,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 164 transitions, 1691 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:37:20,497 INFO L231 Difference]: Finished difference. Result has 202 places, 152 transitions, 1379 flow [2024-06-20 16:37:20,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1379, PETRI_PLACES=202, PETRI_TRANSITIONS=152} [2024-06-20 16:37:20,498 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2024-06-20 16:37:20,498 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 152 transitions, 1379 flow [2024-06-20 16:37:20,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:20,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:20,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:20,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 16:37:20,498 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:20,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:20,499 INFO L85 PathProgramCache]: Analyzing trace with hash 115530253, now seen corresponding path program 6 times [2024-06-20 16:37:20,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:20,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486440023] [2024-06-20 16:37:20,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:20,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:21,699 INFO 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 16:37:21,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:21,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486440023] [2024-06-20 16:37:21,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486440023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:21,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:21,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:21,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498773091] [2024-06-20 16:37:21,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:21,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:21,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:21,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:21,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:21,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:21,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 152 transitions, 1379 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:21,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:21,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:21,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:22,131 INFO L124 PetriNetUnfolderBase]: 382/744 cut-off events. [2024-06-20 16:37:22,132 INFO L125 PetriNetUnfolderBase]: For 63860/63860 co-relation queries the response was YES. [2024-06-20 16:37:22,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4886 conditions, 744 events. 382/744 cut-off events. For 63860/63860 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3578 event pairs, 80 based on Foata normal form. 2/744 useless extension candidates. Maximal degree in co-relation 4792. Up to 672 conditions per place. [2024-06-20 16:37:22,137 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 137 selfloop transitions, 27 changer transitions 0/166 dead transitions. [2024-06-20 16:37:22,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 166 transitions, 1767 flow [2024-06-20 16:37:22,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:22,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:22,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-20 16:37:22,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-20 16:37:22,139 INFO L175 Difference]: Start difference. First operand has 202 places, 152 transitions, 1379 flow. Second operand 10 states and 106 transitions. [2024-06-20 16:37:22,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 166 transitions, 1767 flow [2024-06-20 16:37:22,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 166 transitions, 1715 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 16:37:22,289 INFO L231 Difference]: Finished difference. Result has 204 places, 153 transitions, 1413 flow [2024-06-20 16:37:22,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1413, PETRI_PLACES=204, PETRI_TRANSITIONS=153} [2024-06-20 16:37:22,289 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2024-06-20 16:37:22,289 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 153 transitions, 1413 flow [2024-06-20 16:37:22,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:22,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:22,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:22,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 16:37:22,290 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:22,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:22,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1402059379, now seen corresponding path program 7 times [2024-06-20 16:37:22,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:22,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617017329] [2024-06-20 16:37:22,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:22,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:23,446 INFO 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 16:37:23,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:23,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617017329] [2024-06-20 16:37:23,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617017329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:23,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:23,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:37:23,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710613119] [2024-06-20 16:37:23,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:23,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:37:23,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:23,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:37:23,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:37:23,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:23,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 153 transitions, 1413 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:23,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:23,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:23,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:23,759 INFO L124 PetriNetUnfolderBase]: 386/752 cut-off events. [2024-06-20 16:37:23,759 INFO L125 PetriNetUnfolderBase]: For 67077/67077 co-relation queries the response was YES. [2024-06-20 16:37:23,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4975 conditions, 752 events. 386/752 cut-off events. For 67077/67077 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3645 event pairs, 74 based on Foata normal form. 2/752 useless extension candidates. Maximal degree in co-relation 4880. Up to 681 conditions per place. [2024-06-20 16:37:23,765 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 139 selfloop transitions, 26 changer transitions 0/167 dead transitions. [2024-06-20 16:37:23,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 167 transitions, 1805 flow [2024-06-20 16:37:23,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:23,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:23,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-20 16:37:23,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33548387096774196 [2024-06-20 16:37:23,766 INFO L175 Difference]: Start difference. First operand has 204 places, 153 transitions, 1413 flow. Second operand 10 states and 104 transitions. [2024-06-20 16:37:23,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 167 transitions, 1805 flow [2024-06-20 16:37:23,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 167 transitions, 1729 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 16:37:23,924 INFO L231 Difference]: Finished difference. Result has 206 places, 154 transitions, 1423 flow [2024-06-20 16:37:23,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1423, PETRI_PLACES=206, PETRI_TRANSITIONS=154} [2024-06-20 16:37:23,924 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 176 predicate places. [2024-06-20 16:37:23,924 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 154 transitions, 1423 flow [2024-06-20 16:37:23,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:23,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:23,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:23,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 16:37:23,925 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:23,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:23,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1963771221, now seen corresponding path program 8 times [2024-06-20 16:37:23,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:23,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548056124] [2024-06-20 16:37:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:23,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:25,013 INFO 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 16:37:25,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:25,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548056124] [2024-06-20 16:37:25,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548056124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:25,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:25,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:25,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947266488] [2024-06-20 16:37:25,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:25,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:25,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:25,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:25,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:25,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:25,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 154 transitions, 1423 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:25,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:25,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:25,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:25,362 INFO L124 PetriNetUnfolderBase]: 390/760 cut-off events. [2024-06-20 16:37:25,362 INFO L125 PetriNetUnfolderBase]: For 69080/69080 co-relation queries the response was YES. [2024-06-20 16:37:25,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5034 conditions, 760 events. 390/760 cut-off events. For 69080/69080 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3679 event pairs, 83 based on Foata normal form. 2/760 useless extension candidates. Maximal degree in co-relation 4938. Up to 707 conditions per place. [2024-06-20 16:37:25,368 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 143 selfloop transitions, 22 changer transitions 0/167 dead transitions. [2024-06-20 16:37:25,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 167 transitions, 1813 flow [2024-06-20 16:37:25,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-06-20 16:37:25,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3193548387096774 [2024-06-20 16:37:25,369 INFO L175 Difference]: Start difference. First operand has 206 places, 154 transitions, 1423 flow. Second operand 10 states and 99 transitions. [2024-06-20 16:37:25,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 167 transitions, 1813 flow [2024-06-20 16:37:25,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 167 transitions, 1744 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 16:37:25,539 INFO L231 Difference]: Finished difference. Result has 209 places, 155 transitions, 1435 flow [2024-06-20 16:37:25,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1435, PETRI_PLACES=209, PETRI_TRANSITIONS=155} [2024-06-20 16:37:25,540 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-20 16:37:25,540 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 155 transitions, 1435 flow [2024-06-20 16:37:25,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:25,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:25,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:25,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 16:37:25,540 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:25,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:25,541 INFO L85 PathProgramCache]: Analyzing trace with hash 115522317, now seen corresponding path program 31 times [2024-06-20 16:37:25,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:25,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339579204] [2024-06-20 16:37:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:25,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:26,857 INFO 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 16:37:26,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:26,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339579204] [2024-06-20 16:37:26,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339579204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:26,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:26,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:26,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059031223] [2024-06-20 16:37:26,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:26,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:26,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:26,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:26,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:26,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:26,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 155 transitions, 1435 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:26,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:26,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:26,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:27,345 INFO L124 PetriNetUnfolderBase]: 406/796 cut-off events. [2024-06-20 16:37:27,345 INFO L125 PetriNetUnfolderBase]: For 92047/92047 co-relation queries the response was YES. [2024-06-20 16:37:27,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5103 conditions, 796 events. 406/796 cut-off events. For 92047/92047 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3946 event pairs, 74 based on Foata normal form. 10/804 useless extension candidates. Maximal degree in co-relation 5006. Up to 640 conditions per place. [2024-06-20 16:37:27,351 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 124 selfloop transitions, 37 changer transitions 11/174 dead transitions. [2024-06-20 16:37:27,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 174 transitions, 1837 flow [2024-06-20 16:37:27,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:27,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:27,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-20 16:37:27,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-20 16:37:27,352 INFO L175 Difference]: Start difference. First operand has 209 places, 155 transitions, 1435 flow. Second operand 11 states and 118 transitions. [2024-06-20 16:37:27,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 174 transitions, 1837 flow [2024-06-20 16:37:27,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 174 transitions, 1768 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 16:37:27,517 INFO L231 Difference]: Finished difference. Result has 212 places, 152 transitions, 1416 flow [2024-06-20 16:37:27,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1366, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1416, PETRI_PLACES=212, PETRI_TRANSITIONS=152} [2024-06-20 16:37:27,518 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2024-06-20 16:37:27,518 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 152 transitions, 1416 flow [2024-06-20 16:37:27,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:27,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:27,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:27,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 16:37:27,518 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:27,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:27,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2065498795, now seen corresponding path program 9 times [2024-06-20 16:37:27,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:27,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343807877] [2024-06-20 16:37:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:27,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:28,805 INFO 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 16:37:28,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:28,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343807877] [2024-06-20 16:37:28,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343807877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:28,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:28,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:28,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142043660] [2024-06-20 16:37:28,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:28,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:28,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:28,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:28,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:28,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:28,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 152 transitions, 1416 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:28,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:28,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:28,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:29,152 INFO L124 PetriNetUnfolderBase]: 384/754 cut-off events. [2024-06-20 16:37:29,152 INFO L125 PetriNetUnfolderBase]: For 72640/72640 co-relation queries the response was YES. [2024-06-20 16:37:29,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5018 conditions, 754 events. 384/754 cut-off events. For 72640/72640 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3676 event pairs, 71 based on Foata normal form. 2/754 useless extension candidates. Maximal degree in co-relation 4920. Up to 677 conditions per place. [2024-06-20 16:37:29,158 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 134 selfloop transitions, 30 changer transitions 0/166 dead transitions. [2024-06-20 16:37:29,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 166 transitions, 1810 flow [2024-06-20 16:37:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-20 16:37:29,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225806451612905 [2024-06-20 16:37:29,159 INFO L175 Difference]: Start difference. First operand has 212 places, 152 transitions, 1416 flow. Second operand 10 states and 103 transitions. [2024-06-20 16:37:29,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 166 transitions, 1810 flow [2024-06-20 16:37:29,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 166 transitions, 1732 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:37:29,323 INFO L231 Difference]: Finished difference. Result has 209 places, 153 transitions, 1436 flow [2024-06-20 16:37:29,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1436, PETRI_PLACES=209, PETRI_TRANSITIONS=153} [2024-06-20 16:37:29,323 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-20 16:37:29,323 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 153 transitions, 1436 flow [2024-06-20 16:37:29,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:29,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:29,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:29,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 16:37:29,324 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:29,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:29,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1660189283, now seen corresponding path program 10 times [2024-06-20 16:37:29,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:29,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962686376] [2024-06-20 16:37:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:29,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:30,440 INFO 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 16:37:30,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:30,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962686376] [2024-06-20 16:37:30,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962686376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:30,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:30,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:30,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315703116] [2024-06-20 16:37:30,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:30,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:30,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:30,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:30,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:30,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:30,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 153 transitions, 1436 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:30,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:30,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:30,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:30,834 INFO L124 PetriNetUnfolderBase]: 388/762 cut-off events. [2024-06-20 16:37:30,834 INFO L125 PetriNetUnfolderBase]: For 71256/71256 co-relation queries the response was YES. [2024-06-20 16:37:30,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5065 conditions, 762 events. 388/762 cut-off events. For 71256/71256 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3735 event pairs, 83 based on Foata normal form. 2/762 useless extension candidates. Maximal degree in co-relation 4968. Up to 693 conditions per place. [2024-06-20 16:37:30,840 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 142 selfloop transitions, 22 changer transitions 0/166 dead transitions. [2024-06-20 16:37:30,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 166 transitions, 1826 flow [2024-06-20 16:37:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:30,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:30,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-06-20 16:37:30,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-20 16:37:30,841 INFO L175 Difference]: Start difference. First operand has 209 places, 153 transitions, 1436 flow. Second operand 10 states and 100 transitions. [2024-06-20 16:37:30,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 166 transitions, 1826 flow [2024-06-20 16:37:31,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 166 transitions, 1738 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 16:37:31,015 INFO L231 Difference]: Finished difference. Result has 211 places, 154 transitions, 1432 flow [2024-06-20 16:37:31,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1432, PETRI_PLACES=211, PETRI_TRANSITIONS=154} [2024-06-20 16:37:31,015 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-06-20 16:37:31,015 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 154 transitions, 1432 flow [2024-06-20 16:37:31,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:31,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:31,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:31,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 16:37:31,016 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:31,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash 115314927, now seen corresponding path program 32 times [2024-06-20 16:37:31,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:31,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913736159] [2024-06-20 16:37:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:31,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:37:32,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:32,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913736159] [2024-06-20 16:37:32,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913736159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:32,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:32,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:32,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997436689] [2024-06-20 16:37:32,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:32,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:32,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:32,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:32,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:32,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:32,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 154 transitions, 1432 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:32,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:32,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:32,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:32,663 INFO L124 PetriNetUnfolderBase]: 429/849 cut-off events. [2024-06-20 16:37:32,664 INFO L125 PetriNetUnfolderBase]: For 116692/116692 co-relation queries the response was YES. [2024-06-20 16:37:32,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5978 conditions, 849 events. 429/849 cut-off events. For 116692/116692 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4294 event pairs, 95 based on Foata normal form. 8/855 useless extension candidates. Maximal degree in co-relation 5880. Up to 671 conditions per place. [2024-06-20 16:37:32,670 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 143 selfloop transitions, 26 changer transitions 7/178 dead transitions. [2024-06-20 16:37:32,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 178 transitions, 2006 flow [2024-06-20 16:37:32,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:32,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:32,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-20 16:37:32,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-20 16:37:32,671 INFO L175 Difference]: Start difference. First operand has 211 places, 154 transitions, 1432 flow. Second operand 11 states and 124 transitions. [2024-06-20 16:37:32,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 178 transitions, 2006 flow [2024-06-20 16:37:32,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 178 transitions, 1932 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 16:37:32,887 INFO L231 Difference]: Finished difference. Result has 214 places, 152 transitions, 1398 flow [2024-06-20 16:37:32,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1398, PETRI_PLACES=214, PETRI_TRANSITIONS=152} [2024-06-20 16:37:32,888 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 184 predicate places. [2024-06-20 16:37:32,888 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 152 transitions, 1398 flow [2024-06-20 16:37:32,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:32,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:32,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:32,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 16:37:32,889 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:32,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:32,889 INFO L85 PathProgramCache]: Analyzing trace with hash 187495401, now seen corresponding path program 33 times [2024-06-20 16:37:32,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:32,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839137556] [2024-06-20 16:37:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:32,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:34,073 INFO 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 16:37:34,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:34,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839137556] [2024-06-20 16:37:34,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839137556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:34,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:34,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:34,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355242973] [2024-06-20 16:37:34,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:34,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:34,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:34,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:34,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:34,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:34,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 152 transitions, 1398 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:34,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:34,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:34,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:34,551 INFO L124 PetriNetUnfolderBase]: 398/788 cut-off events. [2024-06-20 16:37:34,551 INFO L125 PetriNetUnfolderBase]: For 96847/96847 co-relation queries the response was YES. [2024-06-20 16:37:34,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5049 conditions, 788 events. 398/788 cut-off events. For 96847/96847 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3940 event pairs, 76 based on Foata normal form. 10/796 useless extension candidates. Maximal degree in co-relation 4950. Up to 631 conditions per place. [2024-06-20 16:37:34,557 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 121 selfloop transitions, 35 changer transitions 13/171 dead transitions. [2024-06-20 16:37:34,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 171 transitions, 1794 flow [2024-06-20 16:37:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-20 16:37:34,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-20 16:37:34,558 INFO L175 Difference]: Start difference. First operand has 214 places, 152 transitions, 1398 flow. Second operand 11 states and 118 transitions. [2024-06-20 16:37:34,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 171 transitions, 1794 flow [2024-06-20 16:37:34,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 171 transitions, 1740 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:37:34,696 INFO L231 Difference]: Finished difference. Result has 213 places, 148 transitions, 1381 flow [2024-06-20 16:37:34,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1381, PETRI_PLACES=213, PETRI_TRANSITIONS=148} [2024-06-20 16:37:34,697 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2024-06-20 16:37:34,697 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 148 transitions, 1381 flow [2024-06-20 16:37:34,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:34,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:34,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:34,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 16:37:34,698 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:34,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:34,698 INFO L85 PathProgramCache]: Analyzing trace with hash 381644557, now seen corresponding path program 11 times [2024-06-20 16:37:34,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:34,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621051685] [2024-06-20 16:37:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:34,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:36,309 INFO 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 16:37:36,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:36,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621051685] [2024-06-20 16:37:36,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621051685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:36,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:36,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:36,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637055122] [2024-06-20 16:37:36,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:36,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:36,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:36,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:36,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:36,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:36,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 148 transitions, 1381 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:36,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:36,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:36,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:36,722 INFO L124 PetriNetUnfolderBase]: 377/745 cut-off events. [2024-06-20 16:37:36,722 INFO L125 PetriNetUnfolderBase]: For 72968/72968 co-relation queries the response was YES. [2024-06-20 16:37:36,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4962 conditions, 745 events. 377/745 cut-off events. For 72968/72968 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3667 event pairs, 76 based on Foata normal form. 2/745 useless extension candidates. Maximal degree in co-relation 4864. Up to 633 conditions per place. [2024-06-20 16:37:36,727 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 127 selfloop transitions, 34 changer transitions 0/163 dead transitions. [2024-06-20 16:37:36,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 163 transitions, 1777 flow [2024-06-20 16:37:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:36,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:36,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-20 16:37:36,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-20 16:37:36,728 INFO L175 Difference]: Start difference. First operand has 213 places, 148 transitions, 1381 flow. Second operand 10 states and 108 transitions. [2024-06-20 16:37:36,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 163 transitions, 1777 flow [2024-06-20 16:37:36,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 163 transitions, 1701 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 16:37:36,872 INFO L231 Difference]: Finished difference. Result has 207 places, 149 transitions, 1415 flow [2024-06-20 16:37:36,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1415, PETRI_PLACES=207, PETRI_TRANSITIONS=149} [2024-06-20 16:37:36,873 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2024-06-20 16:37:36,873 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 149 transitions, 1415 flow [2024-06-20 16:37:36,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:36,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:36,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:36,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 16:37:36,874 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:36,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash 316878973, now seen corresponding path program 12 times [2024-06-20 16:37:36,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:36,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159378955] [2024-06-20 16:37:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:36,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:38,327 INFO 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 16:37:38,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:38,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159378955] [2024-06-20 16:37:38,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159378955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:38,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:38,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:38,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617775076] [2024-06-20 16:37:38,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:38,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:38,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:38,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:38,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:38,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 149 transitions, 1415 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:38,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:38,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:38,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:38,815 INFO L124 PetriNetUnfolderBase]: 381/753 cut-off events. [2024-06-20 16:37:38,815 INFO L125 PetriNetUnfolderBase]: For 69820/69820 co-relation queries the response was YES. [2024-06-20 16:37:38,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5006 conditions, 753 events. 381/753 cut-off events. For 69820/69820 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3698 event pairs, 86 based on Foata normal form. 2/753 useless extension candidates. Maximal degree in co-relation 4910. Up to 681 conditions per place. [2024-06-20 16:37:38,821 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 134 selfloop transitions, 26 changer transitions 0/162 dead transitions. [2024-06-20 16:37:38,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 162 transitions, 1803 flow [2024-06-20 16:37:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-20 16:37:38,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225806451612905 [2024-06-20 16:37:38,822 INFO L175 Difference]: Start difference. First operand has 207 places, 149 transitions, 1415 flow. Second operand 10 states and 103 transitions. [2024-06-20 16:37:38,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 162 transitions, 1803 flow [2024-06-20 16:37:38,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 162 transitions, 1703 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-20 16:37:38,975 INFO L231 Difference]: Finished difference. Result has 209 places, 150 transitions, 1411 flow [2024-06-20 16:37:38,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1411, PETRI_PLACES=209, PETRI_TRANSITIONS=150} [2024-06-20 16:37:38,975 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-20 16:37:38,975 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 150 transitions, 1411 flow [2024-06-20 16:37:38,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:38,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:38,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:38,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 16:37:38,976 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:38,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash 389063167, now seen corresponding path program 13 times [2024-06-20 16:37:38,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:38,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280210499] [2024-06-20 16:37:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:38,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:40,278 INFO 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 16:37:40,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:40,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280210499] [2024-06-20 16:37:40,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280210499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:40,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:40,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:40,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889624572] [2024-06-20 16:37:40,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:40,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:40,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:40,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:40,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:40,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:40,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 150 transitions, 1411 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:40,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:40,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:40,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:40,597 INFO L124 PetriNetUnfolderBase]: 385/761 cut-off events. [2024-06-20 16:37:40,598 INFO L125 PetriNetUnfolderBase]: For 71789/71789 co-relation queries the response was YES. [2024-06-20 16:37:40,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5045 conditions, 761 events. 385/761 cut-off events. For 71789/71789 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3767 event pairs, 80 based on Foata normal form. 2/761 useless extension candidates. Maximal degree in co-relation 4948. Up to 663 conditions per place. [2024-06-20 16:37:40,604 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 132 selfloop transitions, 29 changer transitions 0/163 dead transitions. [2024-06-20 16:37:40,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 163 transitions, 1801 flow [2024-06-20 16:37:40,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:37:40,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:37:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-20 16:37:40,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225806451612905 [2024-06-20 16:37:40,605 INFO L175 Difference]: Start difference. First operand has 209 places, 150 transitions, 1411 flow. Second operand 10 states and 103 transitions. [2024-06-20 16:37:40,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 163 transitions, 1801 flow [2024-06-20 16:37:40,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 163 transitions, 1715 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-20 16:37:40,779 INFO L231 Difference]: Finished difference. Result has 211 places, 151 transitions, 1429 flow [2024-06-20 16:37:40,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1429, PETRI_PLACES=211, PETRI_TRANSITIONS=151} [2024-06-20 16:37:40,780 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-06-20 16:37:40,780 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 151 transitions, 1429 flow [2024-06-20 16:37:40,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:40,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:40,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:40,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 16:37:40,780 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:40,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:40,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1974165219, now seen corresponding path program 34 times [2024-06-20 16:37:40,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:40,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468708352] [2024-06-20 16:37:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:40,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:41,723 INFO 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 16:37:41,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:41,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468708352] [2024-06-20 16:37:41,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468708352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:41,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:41,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:41,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869679143] [2024-06-20 16:37:41,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:41,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:41,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:41,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:41,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:41,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:41,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 151 transitions, 1429 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:41,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:41,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:41,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:42,098 INFO L124 PetriNetUnfolderBase]: 401/797 cut-off events. [2024-06-20 16:37:42,098 INFO L125 PetriNetUnfolderBase]: For 95142/95142 co-relation queries the response was YES. [2024-06-20 16:37:42,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5114 conditions, 797 events. 401/797 cut-off events. For 95142/95142 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3995 event pairs, 91 based on Foata normal form. 10/805 useless extension candidates. Maximal degree in co-relation 5016. Up to 700 conditions per place. [2024-06-20 16:37:42,105 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 136 selfloop transitions, 19 changer transitions 12/169 dead transitions. [2024-06-20 16:37:42,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 169 transitions, 1817 flow [2024-06-20 16:37:42,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:42,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 111 transitions. [2024-06-20 16:37:42,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3255131964809384 [2024-06-20 16:37:42,105 INFO L175 Difference]: Start difference. First operand has 211 places, 151 transitions, 1429 flow. Second operand 11 states and 111 transitions. [2024-06-20 16:37:42,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 169 transitions, 1817 flow [2024-06-20 16:37:42,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 169 transitions, 1723 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 16:37:42,266 INFO L231 Difference]: Finished difference. Result has 214 places, 147 transitions, 1338 flow [2024-06-20 16:37:42,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1338, PETRI_PLACES=214, PETRI_TRANSITIONS=147} [2024-06-20 16:37:42,266 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 184 predicate places. [2024-06-20 16:37:42,266 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 147 transitions, 1338 flow [2024-06-20 16:37:42,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:42,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:42,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:42,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 16:37:42,267 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:42,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:42,267 INFO L85 PathProgramCache]: Analyzing trace with hash 2065490859, now seen corresponding path program 35 times [2024-06-20 16:37:42,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:42,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055875372] [2024-06-20 16:37:42,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:42,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:43,350 INFO 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 16:37:43,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:43,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055875372] [2024-06-20 16:37:43,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055875372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:43,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:43,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:43,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766659346] [2024-06-20 16:37:43,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:43,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:43,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:43,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:43,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:43,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:43,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 147 transitions, 1338 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:43,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:43,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:43,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:43,962 INFO L124 PetriNetUnfolderBase]: 389/781 cut-off events. [2024-06-20 16:37:43,963 INFO L125 PetriNetUnfolderBase]: For 96932/96932 co-relation queries the response was YES. [2024-06-20 16:37:43,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4941 conditions, 781 events. 389/781 cut-off events. For 96932/96932 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3918 event pairs, 85 based on Foata normal form. 10/789 useless extension candidates. Maximal degree in co-relation 4842. Up to 660 conditions per place. [2024-06-20 16:37:43,968 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 127 selfloop transitions, 26 changer transitions 11/166 dead transitions. [2024-06-20 16:37:43,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 166 transitions, 1724 flow [2024-06-20 16:37:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-20 16:37:43,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33724340175953077 [2024-06-20 16:37:43,969 INFO L175 Difference]: Start difference. First operand has 214 places, 147 transitions, 1338 flow. Second operand 11 states and 115 transitions. [2024-06-20 16:37:43,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 166 transitions, 1724 flow [2024-06-20 16:37:44,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 166 transitions, 1682 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:37:44,131 INFO L231 Difference]: Finished difference. Result has 212 places, 144 transitions, 1323 flow [2024-06-20 16:37:44,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1323, PETRI_PLACES=212, PETRI_TRANSITIONS=144} [2024-06-20 16:37:44,132 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2024-06-20 16:37:44,132 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 144 transitions, 1323 flow [2024-06-20 16:37:44,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:44,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:44,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:44,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 16:37:44,132 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:44,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash 381636621, now seen corresponding path program 36 times [2024-06-20 16:37:44,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:44,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129841821] [2024-06-20 16:37:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:44,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:45,424 INFO 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 16:37:45,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:45,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129841821] [2024-06-20 16:37:45,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129841821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:45,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:45,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:45,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635769580] [2024-06-20 16:37:45,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:45,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:45,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:45,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:45,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:45,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:45,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 144 transitions, 1323 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:45,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:45,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:45,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:45,934 INFO L124 PetriNetUnfolderBase]: 379/767 cut-off events. [2024-06-20 16:37:45,934 INFO L125 PetriNetUnfolderBase]: For 94416/94416 co-relation queries the response was YES. [2024-06-20 16:37:45,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4852 conditions, 767 events. 379/767 cut-off events. For 94416/94416 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3875 event pairs, 88 based on Foata normal form. 10/775 useless extension candidates. Maximal degree in co-relation 4754. Up to 651 conditions per place. [2024-06-20 16:37:45,940 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 127 selfloop transitions, 23 changer transitions 11/163 dead transitions. [2024-06-20 16:37:45,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 163 transitions, 1703 flow [2024-06-20 16:37:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:45,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:45,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-20 16:37:45,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34017595307917886 [2024-06-20 16:37:45,941 INFO L175 Difference]: Start difference. First operand has 212 places, 144 transitions, 1323 flow. Second operand 11 states and 116 transitions. [2024-06-20 16:37:45,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 163 transitions, 1703 flow [2024-06-20 16:37:46,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 163 transitions, 1647 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:37:46,118 INFO L231 Difference]: Finished difference. Result has 210 places, 141 transitions, 1288 flow [2024-06-20 16:37:46,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1288, PETRI_PLACES=210, PETRI_TRANSITIONS=141} [2024-06-20 16:37:46,118 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 180 predicate places. [2024-06-20 16:37:46,118 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 141 transitions, 1288 flow [2024-06-20 16:37:46,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:46,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:46,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:46,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 16:37:46,119 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:46,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:46,119 INFO L85 PathProgramCache]: Analyzing trace with hash 309259917, now seen corresponding path program 37 times [2024-06-20 16:37:46,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:46,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625991754] [2024-06-20 16:37:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:46,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:47,360 INFO 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 16:37:47,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:47,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625991754] [2024-06-20 16:37:47,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625991754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:47,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:47,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:47,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273590182] [2024-06-20 16:37:47,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:47,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:47,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:47,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:47,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:47,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:47,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 141 transitions, 1288 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:47,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:47,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:47,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:47,829 INFO L124 PetriNetUnfolderBase]: 369/753 cut-off events. [2024-06-20 16:37:47,830 INFO L125 PetriNetUnfolderBase]: For 91874/91874 co-relation queries the response was YES. [2024-06-20 16:37:47,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4737 conditions, 753 events. 369/753 cut-off events. For 91874/91874 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3811 event pairs, 88 based on Foata normal form. 10/761 useless extension candidates. Maximal degree in co-relation 4640. Up to 628 conditions per place. [2024-06-20 16:37:47,834 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 122 selfloop transitions, 25 changer transitions 11/160 dead transitions. [2024-06-20 16:37:47,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 160 transitions, 1662 flow [2024-06-20 16:37:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:47,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:47,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-20 16:37:47,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-20 16:37:47,835 INFO L175 Difference]: Start difference. First operand has 210 places, 141 transitions, 1288 flow. Second operand 11 states and 117 transitions. [2024-06-20 16:37:47,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 160 transitions, 1662 flow [2024-06-20 16:37:48,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 160 transitions, 1612 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:37:48,002 INFO L231 Difference]: Finished difference. Result has 208 places, 138 transitions, 1267 flow [2024-06-20 16:37:48,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1267, PETRI_PLACES=208, PETRI_TRANSITIONS=138} [2024-06-20 16:37:48,002 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-06-20 16:37:48,002 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 138 transitions, 1267 flow [2024-06-20 16:37:48,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:48,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:48,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:48,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 16:37:48,003 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:48,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:48,003 INFO L85 PathProgramCache]: Analyzing trace with hash 381429231, now seen corresponding path program 38 times [2024-06-20 16:37:48,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:48,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132683730] [2024-06-20 16:37:48,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:48,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:37:49,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:49,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132683730] [2024-06-20 16:37:49,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132683730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:49,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:49,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:49,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056288350] [2024-06-20 16:37:49,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:49,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:49,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:49,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:49,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:49,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:49,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 138 transitions, 1267 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:49,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:49,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:49,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:49,571 INFO L124 PetriNetUnfolderBase]: 386/792 cut-off events. [2024-06-20 16:37:49,572 INFO L125 PetriNetUnfolderBase]: For 110158/110158 co-relation queries the response was YES. [2024-06-20 16:37:49,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5496 conditions, 792 events. 386/792 cut-off events. For 110158/110158 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4066 event pairs, 97 based on Foata normal form. 8/798 useless extension candidates. Maximal degree in co-relation 5400. Up to 612 conditions per place. [2024-06-20 16:37:49,578 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 128 selfloop transitions, 23 changer transitions 8/161 dead transitions. [2024-06-20 16:37:49,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 161 transitions, 1799 flow [2024-06-20 16:37:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-20 16:37:49,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3489736070381232 [2024-06-20 16:37:49,579 INFO L175 Difference]: Start difference. First operand has 208 places, 138 transitions, 1267 flow. Second operand 11 states and 119 transitions. [2024-06-20 16:37:49,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 161 transitions, 1799 flow [2024-06-20 16:37:49,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 161 transitions, 1741 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 16:37:49,773 INFO L231 Difference]: Finished difference. Result has 206 places, 135 transitions, 1236 flow [2024-06-20 16:37:49,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1236, PETRI_PLACES=206, PETRI_TRANSITIONS=135} [2024-06-20 16:37:49,774 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 176 predicate places. [2024-06-20 16:37:49,774 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 135 transitions, 1236 flow [2024-06-20 16:37:49,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:49,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:49,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:49,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 16:37:49,775 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:49,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:49,775 INFO L85 PathProgramCache]: Analyzing trace with hash 388786461, now seen corresponding path program 39 times [2024-06-20 16:37:49,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:49,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142010323] [2024-06-20 16:37:49,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:49,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:51,540 INFO 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 16:37:51,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:51,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142010323] [2024-06-20 16:37:51,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142010323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:51,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:51,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:51,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930186703] [2024-06-20 16:37:51,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:51,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:51,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:51,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:51,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:51,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 135 transitions, 1236 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:51,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:51,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:51,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:51,994 INFO L124 PetriNetUnfolderBase]: 354/728 cut-off events. [2024-06-20 16:37:51,994 INFO L125 PetriNetUnfolderBase]: For 86980/86980 co-relation queries the response was YES. [2024-06-20 16:37:51,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4571 conditions, 728 events. 354/728 cut-off events. For 86980/86980 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3676 event pairs, 88 based on Foata normal form. 10/736 useless extension candidates. Maximal degree in co-relation 4476. Up to 612 conditions per place. [2024-06-20 16:37:52,000 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 118 selfloop transitions, 22 changer transitions 11/153 dead transitions. [2024-06-20 16:37:52,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 153 transitions, 1592 flow [2024-06-20 16:37:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:52,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-20 16:37:52,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3313782991202346 [2024-06-20 16:37:52,000 INFO L175 Difference]: Start difference. First operand has 206 places, 135 transitions, 1236 flow. Second operand 11 states and 113 transitions. [2024-06-20 16:37:52,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 153 transitions, 1592 flow [2024-06-20 16:37:52,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 153 transitions, 1542 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-20 16:37:52,137 INFO L231 Difference]: Finished difference. Result has 203 places, 132 transitions, 1203 flow [2024-06-20 16:37:52,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1203, PETRI_PLACES=203, PETRI_TRANSITIONS=132} [2024-06-20 16:37:52,137 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 173 predicate places. [2024-06-20 16:37:52,137 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 132 transitions, 1203 flow [2024-06-20 16:37:52,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:52,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:52,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:52,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 16:37:52,138 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:52,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:52,138 INFO L85 PathProgramCache]: Analyzing trace with hash 2065283469, now seen corresponding path program 40 times [2024-06-20 16:37:52,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:52,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304844974] [2024-06-20 16:37:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:52,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:53,125 INFO 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 16:37:53,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:53,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304844974] [2024-06-20 16:37:53,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304844974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:53,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:53,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:53,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489603681] [2024-06-20 16:37:53,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:53,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:53,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:53,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:53,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:53,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:53,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 132 transitions, 1203 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:53,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:53,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:53,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:53,564 INFO L124 PetriNetUnfolderBase]: 340/706 cut-off events. [2024-06-20 16:37:53,564 INFO L125 PetriNetUnfolderBase]: For 77457/77457 co-relation queries the response was YES. [2024-06-20 16:37:53,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4409 conditions, 706 events. 340/706 cut-off events. For 77457/77457 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3534 event pairs, 71 based on Foata normal form. 8/712 useless extension candidates. Maximal degree in co-relation 4316. Up to 509 conditions per place. [2024-06-20 16:37:53,569 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 116 selfloop transitions, 29 changer transitions 7/154 dead transitions. [2024-06-20 16:37:53,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 154 transitions, 1709 flow [2024-06-20 16:37:53,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-20 16:37:53,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3489736070381232 [2024-06-20 16:37:53,569 INFO L175 Difference]: Start difference. First operand has 203 places, 132 transitions, 1203 flow. Second operand 11 states and 119 transitions. [2024-06-20 16:37:53,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 154 transitions, 1709 flow [2024-06-20 16:37:53,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 154 transitions, 1657 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 16:37:53,711 INFO L231 Difference]: Finished difference. Result has 200 places, 130 transitions, 1201 flow [2024-06-20 16:37:53,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1201, PETRI_PLACES=200, PETRI_TRANSITIONS=130} [2024-06-20 16:37:53,711 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2024-06-20 16:37:53,712 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 130 transitions, 1201 flow [2024-06-20 16:37:53,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:53,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:53,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:53,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 16:37:53,712 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:53,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2065289049, now seen corresponding path program 41 times [2024-06-20 16:37:53,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:53,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925747890] [2024-06-20 16:37:53,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:53,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:54,945 INFO 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 16:37:54,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:54,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925747890] [2024-06-20 16:37:54,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925747890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:54,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:54,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:54,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735694455] [2024-06-20 16:37:54,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:54,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:54,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:54,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:54,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:55,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:55,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 130 transitions, 1201 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:55,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:55,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:55,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:55,309 INFO L124 PetriNetUnfolderBase]: 338/704 cut-off events. [2024-06-20 16:37:55,310 INFO L125 PetriNetUnfolderBase]: For 79998/79998 co-relation queries the response was YES. [2024-06-20 16:37:55,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4392 conditions, 704 events. 338/704 cut-off events. For 79998/79998 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3540 event pairs, 79 based on Foata normal form. 10/712 useless extension candidates. Maximal degree in co-relation 4300. Up to 568 conditions per place. [2024-06-20 16:37:55,315 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 111 selfloop transitions, 28 changer transitions 10/151 dead transitions. [2024-06-20 16:37:55,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 151 transitions, 1563 flow [2024-06-20 16:37:55,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:37:55,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:37:55,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-20 16:37:55,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33602150537634407 [2024-06-20 16:37:55,316 INFO L175 Difference]: Start difference. First operand has 200 places, 130 transitions, 1201 flow. Second operand 12 states and 125 transitions. [2024-06-20 16:37:55,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 151 transitions, 1563 flow [2024-06-20 16:37:55,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 151 transitions, 1505 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:37:55,462 INFO L231 Difference]: Finished difference. Result has 200 places, 126 transitions, 1166 flow [2024-06-20 16:37:55,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1166, PETRI_PLACES=200, PETRI_TRANSITIONS=126} [2024-06-20 16:37:55,463 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2024-06-20 16:37:55,463 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 126 transitions, 1166 flow [2024-06-20 16:37:55,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:55,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:55,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:55,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 16:37:55,463 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:55,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:55,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2072917405, now seen corresponding path program 14 times [2024-06-20 16:37:55,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:55,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693809791] [2024-06-20 16:37:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:55,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:37:56,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:56,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693809791] [2024-06-20 16:37:56,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693809791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:56,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:56,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:56,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250048422] [2024-06-20 16:37:56,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:56,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:56,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:56,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:56,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:56,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:56,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 126 transitions, 1166 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:56,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:56,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:56,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:57,296 INFO L124 PetriNetUnfolderBase]: 310/648 cut-off events. [2024-06-20 16:37:57,296 INFO L125 PetriNetUnfolderBase]: For 55163/55163 co-relation queries the response was YES. [2024-06-20 16:37:57,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4019 conditions, 648 events. 310/648 cut-off events. For 55163/55163 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3189 event pairs, 72 based on Foata normal form. 2/648 useless extension candidates. Maximal degree in co-relation 3928. Up to 478 conditions per place. [2024-06-20 16:37:57,301 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 115 selfloop transitions, 28 changer transitions 0/145 dead transitions. [2024-06-20 16:37:57,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 145 transitions, 1638 flow [2024-06-20 16:37:57,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:57,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-20 16:37:57,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-20 16:37:57,302 INFO L175 Difference]: Start difference. First operand has 200 places, 126 transitions, 1166 flow. Second operand 11 states and 117 transitions. [2024-06-20 16:37:57,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 145 transitions, 1638 flow [2024-06-20 16:37:57,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 145 transitions, 1568 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-20 16:37:57,439 INFO L231 Difference]: Finished difference. Result has 195 places, 126 transitions, 1162 flow [2024-06-20 16:37:57,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1102, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1162, PETRI_PLACES=195, PETRI_TRANSITIONS=126} [2024-06-20 16:37:57,440 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2024-06-20 16:37:57,440 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 126 transitions, 1162 flow [2024-06-20 16:37:57,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:57,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:57,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:57,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 16:37:57,440 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:57,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:57,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2072640699, now seen corresponding path program 42 times [2024-06-20 16:37:57,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:57,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456792054] [2024-06-20 16:37:57,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:57,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:37:58,861 INFO 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 16:37:58,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:37:58,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456792054] [2024-06-20 16:37:58,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456792054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:37:58,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:37:58,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:37:58,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981882352] [2024-06-20 16:37:58,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:37:58,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:37:58,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:37:58,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:37:58,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:37:58,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:37:58,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 126 transitions, 1162 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:58,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:37:58,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:37:58,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:37:59,328 INFO L124 PetriNetUnfolderBase]: 297/625 cut-off events. [2024-06-20 16:37:59,328 INFO L125 PetriNetUnfolderBase]: For 47847/47847 co-relation queries the response was YES. [2024-06-20 16:37:59,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3269 conditions, 625 events. 297/625 cut-off events. For 47847/47847 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3071 event pairs, 63 based on Foata normal form. 10/633 useless extension candidates. Maximal degree in co-relation 3180. Up to 498 conditions per place. [2024-06-20 16:37:59,332 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 110 selfloop transitions, 23 changer transitions 9/144 dead transitions. [2024-06-20 16:37:59,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 144 transitions, 1498 flow [2024-06-20 16:37:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:37:59,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:37:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-20 16:37:59,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33724340175953077 [2024-06-20 16:37:59,333 INFO L175 Difference]: Start difference. First operand has 195 places, 126 transitions, 1162 flow. Second operand 11 states and 115 transitions. [2024-06-20 16:37:59,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 144 transitions, 1498 flow [2024-06-20 16:37:59,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 144 transitions, 1363 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-20 16:37:59,403 INFO L231 Difference]: Finished difference. Result has 195 places, 122 transitions, 1045 flow [2024-06-20 16:37:59,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1045, PETRI_PLACES=195, PETRI_TRANSITIONS=122} [2024-06-20 16:37:59,403 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2024-06-20 16:37:59,404 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 122 transitions, 1045 flow [2024-06-20 16:37:59,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:37:59,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:37:59,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:37:59,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 16:37:59,404 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:37:59,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:37:59,404 INFO L85 PathProgramCache]: Analyzing trace with hash 470148418, now seen corresponding path program 1 times [2024-06-20 16:37:59,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:37:59,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974768996] [2024-06-20 16:37:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:37:59,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:37:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:38:01,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:01,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974768996] [2024-06-20 16:38:01,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974768996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:01,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:01,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:38:01,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648662074] [2024-06-20 16:38:01,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:01,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:38:01,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:01,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:38:01,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:38:01,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:01,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 122 transitions, 1045 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:01,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:01,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:01,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:01,559 INFO L124 PetriNetUnfolderBase]: 279/595 cut-off events. [2024-06-20 16:38:01,559 INFO L125 PetriNetUnfolderBase]: For 39714/39714 co-relation queries the response was YES. [2024-06-20 16:38:01,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2972 conditions, 595 events. 279/595 cut-off events. For 39714/39714 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2911 event pairs, 55 based on Foata normal form. 6/599 useless extension candidates. Maximal degree in co-relation 2884. Up to 273 conditions per place. [2024-06-20 16:38:01,563 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 81 selfloop transitions, 43 changer transitions 11/137 dead transitions. [2024-06-20 16:38:01,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 137 transitions, 1353 flow [2024-06-20 16:38:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-06-20 16:38:01,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-20 16:38:01,564 INFO L175 Difference]: Start difference. First operand has 195 places, 122 transitions, 1045 flow. Second operand 11 states and 110 transitions. [2024-06-20 16:38:01,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 137 transitions, 1353 flow [2024-06-20 16:38:01,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 137 transitions, 1278 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-20 16:38:01,636 INFO L231 Difference]: Finished difference. Result has 189 places, 115 transitions, 988 flow [2024-06-20 16:38:01,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=988, PETRI_PLACES=189, PETRI_TRANSITIONS=115} [2024-06-20 16:38:01,636 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2024-06-20 16:38:01,637 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 115 transitions, 988 flow [2024-06-20 16:38:01,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:01,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:01,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:01,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 16:38:01,637 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:38:01,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:01,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1825814112, now seen corresponding path program 2 times [2024-06-20 16:38:01,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:01,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593361559] [2024-06-20 16:38:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:01,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:38:03,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:03,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593361559] [2024-06-20 16:38:03,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593361559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:03,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:03,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:38:03,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866059139] [2024-06-20 16:38:03,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:03,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:38:03,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:03,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:38:03,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:38:03,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:03,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 115 transitions, 988 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:03,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:03,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:03,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:03,935 INFO L124 PetriNetUnfolderBase]: 256/540 cut-off events. [2024-06-20 16:38:03,936 INFO L125 PetriNetUnfolderBase]: For 38489/38489 co-relation queries the response was YES. [2024-06-20 16:38:03,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2723 conditions, 540 events. 256/540 cut-off events. For 38489/38489 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2561 event pairs, 46 based on Foata normal form. 6/544 useless extension candidates. Maximal degree in co-relation 2637. Up to 269 conditions per place. [2024-06-20 16:38:03,939 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 67 selfloop transitions, 41 changer transitions 21/131 dead transitions. [2024-06-20 16:38:03,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 131 transitions, 1286 flow [2024-06-20 16:38:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-20 16:38:03,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3196480938416422 [2024-06-20 16:38:03,940 INFO L175 Difference]: Start difference. First operand has 189 places, 115 transitions, 988 flow. Second operand 11 states and 109 transitions. [2024-06-20 16:38:03,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 131 transitions, 1286 flow [2024-06-20 16:38:03,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 131 transitions, 1099 flow, removed 1 selfloop flow, removed 16 redundant places. [2024-06-20 16:38:03,998 INFO L231 Difference]: Finished difference. Result has 183 places, 104 transitions, 816 flow [2024-06-20 16:38:03,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=816, PETRI_PLACES=183, PETRI_TRANSITIONS=104} [2024-06-20 16:38:03,999 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-20 16:38:03,999 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 104 transitions, 816 flow [2024-06-20 16:38:03,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:03,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:03,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:03,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 16:38:03,999 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:38:04,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:04,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1410604520, now seen corresponding path program 3 times [2024-06-20 16:38:04,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:04,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293779541] [2024-06-20 16:38:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:04,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:06,086 INFO 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 16:38:06,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:06,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293779541] [2024-06-20 16:38:06,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293779541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:06,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:06,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:38:06,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439577817] [2024-06-20 16:38:06,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:06,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:38:06,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:06,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:38:06,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:38:06,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:06,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 104 transitions, 816 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:06,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:06,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:06,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:06,635 INFO L124 PetriNetUnfolderBase]: 238/502 cut-off events. [2024-06-20 16:38:06,636 INFO L125 PetriNetUnfolderBase]: For 38281/38281 co-relation queries the response was YES. [2024-06-20 16:38:06,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2475 conditions, 502 events. 238/502 cut-off events. For 38281/38281 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2310 event pairs, 56 based on Foata normal form. 6/506 useless extension candidates. Maximal degree in co-relation 2392. Up to 259 conditions per place. [2024-06-20 16:38:06,639 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 68 selfloop transitions, 33 changer transitions 16/119 dead transitions. [2024-06-20 16:38:06,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 119 transitions, 1090 flow [2024-06-20 16:38:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:38:06,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:38:06,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-20 16:38:06,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-20 16:38:06,640 INFO L175 Difference]: Start difference. First operand has 183 places, 104 transitions, 816 flow. Second operand 10 states and 105 transitions. [2024-06-20 16:38:06,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 119 transitions, 1090 flow [2024-06-20 16:38:06,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 119 transitions, 994 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-20 16:38:06,694 INFO L231 Difference]: Finished difference. Result has 170 places, 95 transitions, 731 flow [2024-06-20 16:38:06,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=731, PETRI_PLACES=170, PETRI_TRANSITIONS=95} [2024-06-20 16:38:06,695 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 140 predicate places. [2024-06-20 16:38:06,695 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 95 transitions, 731 flow [2024-06-20 16:38:06,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:06,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:06,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:06,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 16:38:06,695 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:38:06,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:06,696 INFO L85 PathProgramCache]: Analyzing trace with hash 84873858, now seen corresponding path program 4 times [2024-06-20 16:38:06,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:06,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875161040] [2024-06-20 16:38:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:06,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:08,073 INFO 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 16:38:08,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:08,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875161040] [2024-06-20 16:38:08,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875161040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:08,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:08,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:38:08,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421190588] [2024-06-20 16:38:08,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:08,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:38:08,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:08,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:38:08,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:38:08,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:08,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 95 transitions, 731 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:08,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:08,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:08,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:08,421 INFO L124 PetriNetUnfolderBase]: 222/470 cut-off events. [2024-06-20 16:38:08,422 INFO L125 PetriNetUnfolderBase]: For 31563/31563 co-relation queries the response was YES. [2024-06-20 16:38:08,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2267 conditions, 470 events. 222/470 cut-off events. For 31563/31563 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2114 event pairs, 50 based on Foata normal form. 6/474 useless extension candidates. Maximal degree in co-relation 2190. Up to 249 conditions per place. [2024-06-20 16:38:08,425 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 63 selfloop transitions, 32 changer transitions 15/112 dead transitions. [2024-06-20 16:38:08,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 112 transitions, 995 flow [2024-06-20 16:38:08,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:08,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:08,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-06-20 16:38:08,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-20 16:38:08,425 INFO L175 Difference]: Start difference. First operand has 170 places, 95 transitions, 731 flow. Second operand 11 states and 110 transitions. [2024-06-20 16:38:08,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 112 transitions, 995 flow [2024-06-20 16:38:08,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 112 transitions, 917 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-20 16:38:08,479 INFO L231 Difference]: Finished difference. Result has 161 places, 88 transitions, 678 flow [2024-06-20 16:38:08,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=678, PETRI_PLACES=161, PETRI_TRANSITIONS=88} [2024-06-20 16:38:08,479 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 131 predicate places. [2024-06-20 16:38:08,479 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 88 transitions, 678 flow [2024-06-20 16:38:08,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:08,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:08,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:08,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 16:38:08,480 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:38:08,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:08,480 INFO L85 PathProgramCache]: Analyzing trace with hash 536238504, now seen corresponding path program 5 times [2024-06-20 16:38:08,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:08,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071436541] [2024-06-20 16:38:08,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:08,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:38:10,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:10,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071436541] [2024-06-20 16:38:10,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071436541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:10,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:10,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:38:10,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102958566] [2024-06-20 16:38:10,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:10,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:38:10,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:10,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:38:10,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:38:10,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:10,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 88 transitions, 678 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:10,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:10,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:10,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:10,400 INFO L124 PetriNetUnfolderBase]: 208/444 cut-off events. [2024-06-20 16:38:10,400 INFO L125 PetriNetUnfolderBase]: For 27451/27451 co-relation queries the response was YES. [2024-06-20 16:38:10,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2125 conditions, 444 events. 208/444 cut-off events. For 27451/27451 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1961 event pairs, 50 based on Foata normal form. 6/448 useless extension candidates. Maximal degree in co-relation 2052. Up to 239 conditions per place. [2024-06-20 16:38:10,403 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 58 selfloop transitions, 32 changer transitions 12/104 dead transitions. [2024-06-20 16:38:10,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 104 transitions, 922 flow [2024-06-20 16:38:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:10,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:10,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 107 transitions. [2024-06-20 16:38:10,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31378299120234604 [2024-06-20 16:38:10,403 INFO L175 Difference]: Start difference. First operand has 161 places, 88 transitions, 678 flow. Second operand 11 states and 107 transitions. [2024-06-20 16:38:10,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 104 transitions, 922 flow [2024-06-20 16:38:10,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 104 transitions, 844 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-20 16:38:10,447 INFO L231 Difference]: Finished difference. Result has 153 places, 84 transitions, 648 flow [2024-06-20 16:38:10,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=648, PETRI_PLACES=153, PETRI_TRANSITIONS=84} [2024-06-20 16:38:10,448 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2024-06-20 16:38:10,448 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 84 transitions, 648 flow [2024-06-20 16:38:10,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:10,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:10,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:10,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 16:38:10,448 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:38:10,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:10,449 INFO L85 PathProgramCache]: Analyzing trace with hash 314850768, now seen corresponding path program 6 times [2024-06-20 16:38:10,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:10,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428868699] [2024-06-20 16:38:10,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:10,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:11,796 INFO 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 16:38:11,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:11,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428868699] [2024-06-20 16:38:11,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428868699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:11,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:11,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:38:11,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542478829] [2024-06-20 16:38:11,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:11,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:38:11,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:11,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:38:11,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:38:11,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:11,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 84 transitions, 648 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:11,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:11,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:11,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:12,118 INFO L124 PetriNetUnfolderBase]: 194/422 cut-off events. [2024-06-20 16:38:12,118 INFO L125 PetriNetUnfolderBase]: For 24547/24547 co-relation queries the response was YES. [2024-06-20 16:38:12,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 422 events. 194/422 cut-off events. For 24547/24547 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1844 event pairs, 48 based on Foata normal form. 6/426 useless extension candidates. Maximal degree in co-relation 1942. Up to 211 conditions per place. [2024-06-20 16:38:12,120 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 46 selfloop transitions, 18 changer transitions 34/100 dead transitions. [2024-06-20 16:38:12,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 100 transitions, 882 flow [2024-06-20 16:38:12,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-20 16:38:12,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31085043988269795 [2024-06-20 16:38:12,121 INFO L175 Difference]: Start difference. First operand has 153 places, 84 transitions, 648 flow. Second operand 11 states and 106 transitions. [2024-06-20 16:38:12,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 100 transitions, 882 flow [2024-06-20 16:38:12,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 100 transitions, 812 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 16:38:12,157 INFO L231 Difference]: Finished difference. Result has 149 places, 64 transitions, 494 flow [2024-06-20 16:38:12,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=494, PETRI_PLACES=149, PETRI_TRANSITIONS=64} [2024-06-20 16:38:12,158 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2024-06-20 16:38:12,158 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 64 transitions, 494 flow [2024-06-20 16:38:12,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:12,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:12,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:12,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-20 16:38:12,158 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:38:12,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:12,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1523893588, now seen corresponding path program 7 times [2024-06-20 16:38:12,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:12,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112021751] [2024-06-20 16:38:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:12,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:13,744 INFO 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 16:38:13,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:13,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112021751] [2024-06-20 16:38:13,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112021751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:13,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:13,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:38:13,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343814977] [2024-06-20 16:38:13,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:13,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:38:13,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:13,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:38:13,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:38:13,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:13,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 64 transitions, 494 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:13,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:13,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:13,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:14,184 INFO L124 PetriNetUnfolderBase]: 160/341 cut-off events. [2024-06-20 16:38:14,184 INFO L125 PetriNetUnfolderBase]: For 22595/22595 co-relation queries the response was YES. [2024-06-20 16:38:14,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1697 conditions, 341 events. 160/341 cut-off events. For 22595/22595 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1406 event pairs, 44 based on Foata normal form. 6/346 useless extension candidates. Maximal degree in co-relation 1629. Up to 247 conditions per place. [2024-06-20 16:38:14,186 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 49 selfloop transitions, 14 changer transitions 14/79 dead transitions. [2024-06-20 16:38:14,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 79 transitions, 686 flow [2024-06-20 16:38:14,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-20 16:38:14,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31085043988269795 [2024-06-20 16:38:14,187 INFO L175 Difference]: Start difference. First operand has 149 places, 64 transitions, 494 flow. Second operand 11 states and 106 transitions. [2024-06-20 16:38:14,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 79 transitions, 686 flow [2024-06-20 16:38:14,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 79 transitions, 607 flow, removed 13 selfloop flow, removed 22 redundant places. [2024-06-20 16:38:14,207 INFO L231 Difference]: Finished difference. Result has 114 places, 59 transitions, 417 flow [2024-06-20 16:38:14,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=417, PETRI_PLACES=114, PETRI_TRANSITIONS=59} [2024-06-20 16:38:14,208 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2024-06-20 16:38:14,208 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 59 transitions, 417 flow [2024-06-20 16:38:14,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:14,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:14,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:14,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-20 16:38:14,209 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:38:14,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:14,209 INFO L85 PathProgramCache]: Analyzing trace with hash -394045468, now seen corresponding path program 8 times [2024-06-20 16:38:14,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:14,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844785216] [2024-06-20 16:38:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:14,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:15,566 INFO 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 16:38:15,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:15,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844785216] [2024-06-20 16:38:15,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844785216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:15,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:15,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:38:15,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59271862] [2024-06-20 16:38:15,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:15,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:38:15,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:15,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:38:15,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:38:15,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:15,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 59 transitions, 417 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:15,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:15,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:15,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:15,898 INFO L124 PetriNetUnfolderBase]: 150/319 cut-off events. [2024-06-20 16:38:15,898 INFO L125 PetriNetUnfolderBase]: For 13059/13059 co-relation queries the response was YES. [2024-06-20 16:38:15,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 319 events. 150/319 cut-off events. For 13059/13059 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1275 event pairs, 39 based on Foata normal form. 6/324 useless extension candidates. Maximal degree in co-relation 1402. Up to 220 conditions per place. [2024-06-20 16:38:15,899 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 42 selfloop transitions, 18 changer transitions 12/74 dead transitions. [2024-06-20 16:38:15,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 74 transitions, 599 flow [2024-06-20 16:38:15,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:15,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2024-06-20 16:38:15,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30498533724340177 [2024-06-20 16:38:15,913 INFO L175 Difference]: Start difference. First operand has 114 places, 59 transitions, 417 flow. Second operand 11 states and 104 transitions. [2024-06-20 16:38:15,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 74 transitions, 599 flow [2024-06-20 16:38:15,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 74 transitions, 561 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 16:38:15,924 INFO L231 Difference]: Finished difference. Result has 106 places, 55 transitions, 392 flow [2024-06-20 16:38:15,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=392, PETRI_PLACES=106, PETRI_TRANSITIONS=55} [2024-06-20 16:38:15,925 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 76 predicate places. [2024-06-20 16:38:15,925 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 55 transitions, 392 flow [2024-06-20 16:38:15,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:15,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:15,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:15,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-20 16:38:15,925 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:38:15,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:15,926 INFO L85 PathProgramCache]: Analyzing trace with hash -824230684, now seen corresponding path program 9 times [2024-06-20 16:38:15,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:15,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621479416] [2024-06-20 16:38:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:15,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:17,306 INFO 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 16:38:17,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:17,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621479416] [2024-06-20 16:38:17,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621479416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:17,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:17,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:38:17,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834390927] [2024-06-20 16:38:17,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:17,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:38:17,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:17,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:38:17,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:38:17,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:17,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 55 transitions, 392 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:17,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:17,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:17,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:17,591 INFO L124 PetriNetUnfolderBase]: 141/300 cut-off events. [2024-06-20 16:38:17,591 INFO L125 PetriNetUnfolderBase]: For 10483/10483 co-relation queries the response was YES. [2024-06-20 16:38:17,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 300 events. 141/300 cut-off events. For 10483/10483 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1171 event pairs, 44 based on Foata normal form. 6/305 useless extension candidates. Maximal degree in co-relation 1302. Up to 218 conditions per place. [2024-06-20 16:38:17,593 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 42 selfloop transitions, 14 changer transitions 11/69 dead transitions. [2024-06-20 16:38:17,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 69 transitions, 560 flow [2024-06-20 16:38:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:17,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2024-06-20 16:38:17,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2991202346041056 [2024-06-20 16:38:17,594 INFO L175 Difference]: Start difference. First operand has 106 places, 55 transitions, 392 flow. Second operand 11 states and 102 transitions. [2024-06-20 16:38:17,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 69 transitions, 560 flow [2024-06-20 16:38:17,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 69 transitions, 516 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-20 16:38:17,604 INFO L231 Difference]: Finished difference. Result has 100 places, 52 transitions, 361 flow [2024-06-20 16:38:17,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=361, PETRI_PLACES=100, PETRI_TRANSITIONS=52} [2024-06-20 16:38:17,604 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 70 predicate places. [2024-06-20 16:38:17,604 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 52 transitions, 361 flow [2024-06-20 16:38:17,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:17,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:17,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:17,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-20 16:38:17,605 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:38:17,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:17,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1752564732, now seen corresponding path program 10 times [2024-06-20 16:38:17,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:17,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512163676] [2024-06-20 16:38:17,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:17,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:18,868 INFO 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 16:38:18,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:18,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512163676] [2024-06-20 16:38:18,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512163676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:18,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:18,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:38:18,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31883731] [2024-06-20 16:38:18,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:18,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:38:18,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:18,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:38:18,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:38:18,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:18,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 52 transitions, 361 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:18,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:18,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:18,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:19,293 INFO L124 PetriNetUnfolderBase]: 131/282 cut-off events. [2024-06-20 16:38:19,293 INFO L125 PetriNetUnfolderBase]: For 8713/8713 co-relation queries the response was YES. [2024-06-20 16:38:19,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1243 conditions, 282 events. 131/282 cut-off events. For 8713/8713 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1069 event pairs, 39 based on Foata normal form. 6/287 useless extension candidates. Maximal degree in co-relation 1196. Up to 207 conditions per place. [2024-06-20 16:38:19,294 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 39 selfloop transitions, 12 changer transitions 13/66 dead transitions. [2024-06-20 16:38:19,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 66 transitions, 523 flow [2024-06-20 16:38:19,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:19,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 101 transitions. [2024-06-20 16:38:19,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2961876832844575 [2024-06-20 16:38:19,295 INFO L175 Difference]: Start difference. First operand has 100 places, 52 transitions, 361 flow. Second operand 11 states and 101 transitions. [2024-06-20 16:38:19,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 66 transitions, 523 flow [2024-06-20 16:38:19,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 66 transitions, 489 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 16:38:19,304 INFO L231 Difference]: Finished difference. Result has 96 places, 47 transitions, 318 flow [2024-06-20 16:38:19,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=318, PETRI_PLACES=96, PETRI_TRANSITIONS=47} [2024-06-20 16:38:19,304 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2024-06-20 16:38:19,304 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 47 transitions, 318 flow [2024-06-20 16:38:19,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:19,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:19,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:19,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-20 16:38:19,305 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:38:19,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:19,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1233603198, now seen corresponding path program 11 times [2024-06-20 16:38:19,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:19,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900143839] [2024-06-20 16:38:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:19,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:20,803 INFO 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 16:38:20,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:20,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900143839] [2024-06-20 16:38:20,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900143839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:20,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:20,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:38:20,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351809400] [2024-06-20 16:38:20,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:20,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:38:20,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:20,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:38:20,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:38:20,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:20,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 47 transitions, 318 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:20,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:20,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:20,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:21,154 INFO L124 PetriNetUnfolderBase]: 118/259 cut-off events. [2024-06-20 16:38:21,155 INFO L125 PetriNetUnfolderBase]: For 7636/7636 co-relation queries the response was YES. [2024-06-20 16:38:21,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1129 conditions, 259 events. 118/259 cut-off events. For 7636/7636 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 964 event pairs, 38 based on Foata normal form. 6/264 useless extension candidates. Maximal degree in co-relation 1084. Up to 171 conditions per place. [2024-06-20 16:38:21,156 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 36 selfloop transitions, 13 changer transitions 10/61 dead transitions. [2024-06-20 16:38:21,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 61 transitions, 468 flow [2024-06-20 16:38:21,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2024-06-20 16:38:21,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2991202346041056 [2024-06-20 16:38:21,157 INFO L175 Difference]: Start difference. First operand has 96 places, 47 transitions, 318 flow. Second operand 11 states and 102 transitions. [2024-06-20 16:38:21,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 61 transitions, 468 flow [2024-06-20 16:38:21,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 61 transitions, 419 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-20 16:38:21,164 INFO L231 Difference]: Finished difference. Result has 89 places, 43 transitions, 278 flow [2024-06-20 16:38:21,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=278, PETRI_PLACES=89, PETRI_TRANSITIONS=43} [2024-06-20 16:38:21,164 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-06-20 16:38:21,164 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 43 transitions, 278 flow [2024-06-20 16:38:21,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:21,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:21,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:21,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-20 16:38:21,165 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:38:21,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:21,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1053919294, now seen corresponding path program 12 times [2024-06-20 16:38:21,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:21,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944806539] [2024-06-20 16:38:21,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:21,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:22,616 INFO 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 16:38:22,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:22,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944806539] [2024-06-20 16:38:22,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944806539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:22,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:22,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:38:22,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699801954] [2024-06-20 16:38:22,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:22,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:38:22,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:22,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:38:22,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:38:22,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:22,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 43 transitions, 278 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:22,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:22,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:22,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:23,009 INFO L124 PetriNetUnfolderBase]: 106/235 cut-off events. [2024-06-20 16:38:23,009 INFO L125 PetriNetUnfolderBase]: For 6587/6587 co-relation queries the response was YES. [2024-06-20 16:38:23,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 235 events. 106/235 cut-off events. For 6587/6587 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 829 event pairs, 40 based on Foata normal form. 6/240 useless extension candidates. Maximal degree in co-relation 970. Up to 167 conditions per place. [2024-06-20 16:38:23,010 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 29 selfloop transitions, 8 changer transitions 17/56 dead transitions. [2024-06-20 16:38:23,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 56 transitions, 416 flow [2024-06-20 16:38:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 99 transitions. [2024-06-20 16:38:23,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903225806451613 [2024-06-20 16:38:23,011 INFO L175 Difference]: Start difference. First operand has 89 places, 43 transitions, 278 flow. Second operand 11 states and 99 transitions. [2024-06-20 16:38:23,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 56 transitions, 416 flow [2024-06-20 16:38:23,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 56 transitions, 382 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-20 16:38:23,016 INFO L231 Difference]: Finished difference. Result has 83 places, 37 transitions, 231 flow [2024-06-20 16:38:23,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=231, PETRI_PLACES=83, PETRI_TRANSITIONS=37} [2024-06-20 16:38:23,017 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2024-06-20 16:38:23,017 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 37 transitions, 231 flow [2024-06-20 16:38:23,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:23,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:23,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:23,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-20 16:38:23,017 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:38:23,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:23,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1061000432, now seen corresponding path program 13 times [2024-06-20 16:38:23,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:23,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722537349] [2024-06-20 16:38:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:23,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:38:24,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:24,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722537349] [2024-06-20 16:38:24,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722537349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:24,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:24,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:38:24,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904649153] [2024-06-20 16:38:24,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:24,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:38:24,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:24,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:38:24,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:38:24,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:24,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 37 transitions, 231 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:24,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:24,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:24,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:24,492 INFO L124 PetriNetUnfolderBase]: 95/210 cut-off events. [2024-06-20 16:38:24,492 INFO L125 PetriNetUnfolderBase]: For 5203/5203 co-relation queries the response was YES. [2024-06-20 16:38:24,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 210 events. 95/210 cut-off events. For 5203/5203 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 711 event pairs, 35 based on Foata normal form. 6/215 useless extension candidates. Maximal degree in co-relation 846. Up to 138 conditions per place. [2024-06-20 16:38:24,493 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 26 selfloop transitions, 7 changer transitions 16/51 dead transitions. [2024-06-20 16:38:24,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 51 transitions, 361 flow [2024-06-20 16:38:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 98 transitions. [2024-06-20 16:38:24,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2873900293255132 [2024-06-20 16:38:24,494 INFO L175 Difference]: Start difference. First operand has 83 places, 37 transitions, 231 flow. Second operand 11 states and 98 transitions. [2024-06-20 16:38:24,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 51 transitions, 361 flow [2024-06-20 16:38:24,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 51 transitions, 333 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 16:38:24,498 INFO L231 Difference]: Finished difference. Result has 73 places, 31 transitions, 179 flow [2024-06-20 16:38:24,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=179, PETRI_PLACES=73, PETRI_TRANSITIONS=31} [2024-06-20 16:38:24,498 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2024-06-20 16:38:24,498 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 31 transitions, 179 flow [2024-06-20 16:38:24,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:24,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:24,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:24,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-20 16:38:24,499 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:38:24,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:24,499 INFO L85 PathProgramCache]: Analyzing trace with hash -164356858, now seen corresponding path program 14 times [2024-06-20 16:38:24,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:24,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453262276] [2024-06-20 16:38:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:24,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:38:26,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:26,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453262276] [2024-06-20 16:38:26,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453262276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:26,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:26,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:38:26,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673477228] [2024-06-20 16:38:26,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:26,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:38:26,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:26,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:38:26,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:38:26,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:26,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 31 transitions, 179 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:26,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:26,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:26,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:26,574 INFO L124 PetriNetUnfolderBase]: 80/181 cut-off events. [2024-06-20 16:38:26,574 INFO L125 PetriNetUnfolderBase]: For 3237/3237 co-relation queries the response was YES. [2024-06-20 16:38:26,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 181 events. 80/181 cut-off events. For 3237/3237 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 567 event pairs, 33 based on Foata normal form. 6/186 useless extension candidates. Maximal degree in co-relation 692. Up to 111 conditions per place. [2024-06-20 16:38:26,574 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 23 selfloop transitions, 8 changer transitions 11/44 dead transitions. [2024-06-20 16:38:26,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 44 transitions, 293 flow [2024-06-20 16:38:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 96 transitions. [2024-06-20 16:38:26,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28152492668621704 [2024-06-20 16:38:26,575 INFO L175 Difference]: Start difference. First operand has 73 places, 31 transitions, 179 flow. Second operand 11 states and 96 transitions. [2024-06-20 16:38:26,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 44 transitions, 293 flow [2024-06-20 16:38:26,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 44 transitions, 266 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-20 16:38:26,577 INFO L231 Difference]: Finished difference. Result has 65 places, 28 transitions, 156 flow [2024-06-20 16:38:26,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=156, PETRI_PLACES=65, PETRI_TRANSITIONS=28} [2024-06-20 16:38:26,578 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-20 16:38:26,578 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 28 transitions, 156 flow [2024-06-20 16:38:26,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:26,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:26,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:26,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-20 16:38:26,578 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:38:26,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:26,578 INFO L85 PathProgramCache]: Analyzing trace with hash 416039696, now seen corresponding path program 15 times [2024-06-20 16:38:26,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:26,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572129107] [2024-06-20 16:38:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:26,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:38:27,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:27,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572129107] [2024-06-20 16:38:27,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572129107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:27,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:27,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:38:27,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671652456] [2024-06-20 16:38:27,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:27,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:38:27,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:27,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:38:27,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:38:27,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:27,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 28 transitions, 156 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:27,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:27,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:27,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:28,113 INFO L124 PetriNetUnfolderBase]: 55/130 cut-off events. [2024-06-20 16:38:28,114 INFO L125 PetriNetUnfolderBase]: For 1543/1543 co-relation queries the response was YES. [2024-06-20 16:38:28,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 130 events. 55/130 cut-off events. For 1543/1543 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 330 event pairs, 16 based on Foata normal form. 6/135 useless extension candidates. Maximal degree in co-relation 430. Up to 61 conditions per place. [2024-06-20 16:38:28,114 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 18 selfloop transitions, 5 changer transitions 17/42 dead transitions. [2024-06-20 16:38:28,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 42 transitions, 266 flow [2024-06-20 16:38:28,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:28,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:28,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 96 transitions. [2024-06-20 16:38:28,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28152492668621704 [2024-06-20 16:38:28,115 INFO L175 Difference]: Start difference. First operand has 65 places, 28 transitions, 156 flow. Second operand 11 states and 96 transitions. [2024-06-20 16:38:28,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 42 transitions, 266 flow [2024-06-20 16:38:28,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 42 transitions, 244 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 16:38:28,117 INFO L231 Difference]: Finished difference. Result has 61 places, 22 transitions, 117 flow [2024-06-20 16:38:28,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=117, PETRI_PLACES=61, PETRI_TRANSITIONS=22} [2024-06-20 16:38:28,117 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2024-06-20 16:38:28,117 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 22 transitions, 117 flow [2024-06-20 16:38:28,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:28,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:38:28,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:28,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-20 16:38:28,118 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:38:28,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:38:28,118 INFO L85 PathProgramCache]: Analyzing trace with hash -513878162, now seen corresponding path program 16 times [2024-06-20 16:38:28,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:38:28,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136872628] [2024-06-20 16:38:28,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:38:28,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:38:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:38:29,663 INFO 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 16:38:29,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:38:29,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136872628] [2024-06-20 16:38:29,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136872628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:38:29,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:38:29,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:38:29,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796499327] [2024-06-20 16:38:29,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:38:29,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:38:29,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:38:29,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:38:29,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:38:29,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:38:29,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 22 transitions, 117 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:29,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:38:29,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:38:29,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:38:29,996 INFO L124 PetriNetUnfolderBase]: 24/65 cut-off events. [2024-06-20 16:38:29,996 INFO L125 PetriNetUnfolderBase]: For 595/595 co-relation queries the response was YES. [2024-06-20 16:38:29,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 65 events. 24/65 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 1 based on Foata normal form. 6/70 useless extension candidates. Maximal degree in co-relation 178. Up to 24 conditions per place. [2024-06-20 16:38:29,996 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2024-06-20 16:38:29,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 30 transitions, 161 flow [2024-06-20 16:38:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:38:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:38:29,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 84 transitions. [2024-06-20 16:38:29,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24633431085043989 [2024-06-20 16:38:29,997 INFO L175 Difference]: Start difference. First operand has 61 places, 22 transitions, 117 flow. Second operand 11 states and 84 transitions. [2024-06-20 16:38:29,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 30 transitions, 161 flow [2024-06-20 16:38:29,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 30 transitions, 123 flow, removed 2 selfloop flow, removed 18 redundant places. [2024-06-20 16:38:29,998 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2024-06-20 16:38:29,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2024-06-20 16:38:29,998 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-06-20 16:38:29,998 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2024-06-20 16:38:29,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:38:30,000 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-20 16:38:30,000 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-20 16:38:30,000 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-20 16:38:30,000 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-20 16:38:30,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-20 16:38:30,001 INFO L445 BasicCegarLoop]: Path program histogram: [42, 21, 20, 16, 14, 10, 9, 6, 6, 6, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:38:30,003 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-20 16:38:30,003 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-20 16:38:30,006 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-20 16:38:30,006 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-20 16:38:30,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.06 04:38:30 BasicIcfg [2024-06-20 16:38:30,007 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-20 16:38:30,007 INFO L158 Benchmark]: Toolchain (without parser) took 310511.83ms. Allocated memory was 161.5MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 122.9MB in the beginning and 894.5MB in the end (delta: -771.6MB). Peak memory consumption was 270.7MB. Max. memory is 16.1GB. [2024-06-20 16:38:30,007 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 109.1MB. Free memory is still 79.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 16:38:30,007 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 109.1MB. Free memory is still 73.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 16:38:30,007 INFO L158 Benchmark]: CACSL2BoogieTranslator took 593.99ms. Allocated memory is still 161.5MB. Free memory was 121.8MB in the beginning and 86.2MB in the end (delta: 35.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2024-06-20 16:38:30,009 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.07ms. Allocated memory is still 161.5MB. Free memory was 86.2MB in the beginning and 83.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-20 16:38:30,009 INFO L158 Benchmark]: Boogie Preprocessor took 141.59ms. Allocated memory is still 161.5MB. Free memory was 83.0MB in the beginning and 128.3MB in the end (delta: -45.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-06-20 16:38:30,009 INFO L158 Benchmark]: RCFGBuilder took 717.08ms. Allocated memory is still 161.5MB. Free memory was 128.3MB in the beginning and 58.1MB in the end (delta: 70.3MB). Peak memory consumption was 69.2MB. Max. memory is 16.1GB. [2024-06-20 16:38:30,010 INFO L158 Benchmark]: TraceAbstraction took 308991.98ms. Allocated memory was 161.5MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 58.1MB in the beginning and 894.5MB in the end (delta: -836.4MB). Peak memory consumption was 210.1MB. Max. memory is 16.1GB. [2024-06-20 16:38:30,010 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.15ms. Allocated memory is still 109.1MB. Free memory is still 79.0MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.13ms. Allocated memory is still 109.1MB. Free memory is still 73.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 593.99ms. Allocated memory is still 161.5MB. Free memory was 121.8MB in the beginning and 86.2MB in the end (delta: 35.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.07ms. Allocated memory is still 161.5MB. Free memory was 86.2MB in the beginning and 83.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 141.59ms. Allocated memory is still 161.5MB. Free memory was 83.0MB in the beginning and 128.3MB in the end (delta: -45.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * RCFGBuilder took 717.08ms. Allocated memory is still 161.5MB. Free memory was 128.3MB in the beginning and 58.1MB in the end (delta: 70.3MB). Peak memory consumption was 69.2MB. Max. memory is 16.1GB. * TraceAbstraction took 308991.98ms. Allocated memory was 161.5MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 58.1MB in the beginning and 894.5MB in the end (delta: -836.4MB). Peak memory consumption was 210.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 829]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 830]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 50 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 308.9s, OverallIterations: 185, TraceHistogramMax: 1, PathProgramHistogramMax: 42, EmptinessCheckTime: 0.0s, AutomataDifference: 116.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9697 SdHoareTripleChecker+Valid, 40.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8328 mSDsluCounter, 9750 SdHoareTripleChecker+Invalid, 34.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8677 mSDsCounter, 3441 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 65308 IncrementalHoareTripleChecker+Invalid, 68749 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3441 mSolverCounterUnsat, 1073 mSDtfsCounter, 65308 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2150 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4561 ImplicationChecksByTransitivity, 49.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3765occurred in iteration=107, InterpolantAutomatonStates: 1760, 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: 0.2s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 188.9s InterpolantComputationTime, 3052 NumberOfCodeBlocks, 3052 NumberOfCodeBlocksAsserted, 185 NumberOfCheckSat, 2867 ConstructedInterpolants, 0 QuantifiedInterpolants, 114001 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 185 InterpolantComputations, 185 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 16:38:30,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE