./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi001_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.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi001_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi001_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi001_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-eb4cb34-m [2024-06-21 21:19:30,915 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:19:30,972 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:19:30,975 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:19:30,976 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:19:30,999 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:19:30,999 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:19:31,000 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:19:31,001 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:19:31,004 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:19:31,004 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:19:31,004 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:19:31,005 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:19:31,006 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:19:31,006 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:19:31,006 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:19:31,007 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:19:31,007 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:19:31,007 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:19:31,007 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:19:31,007 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:19:31,008 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:19:31,008 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:19:31,008 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:19:31,008 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:19:31,009 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:19:31,009 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:19:31,009 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:19:31,010 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:19:31,010 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:19:31,011 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:19:31,011 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:19:31,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:19:31,011 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:19:31,012 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:19:31,012 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:19:31,012 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:19:31,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:19:31,012 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:19:31,012 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:19:31,013 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:19:31,013 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:19:31,013 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:19:31,013 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:19:31,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:19:31,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:19:31,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:19:31,228 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:19:31,228 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:19:31,229 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi001_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 21:19:32,247 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:19:32,455 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:19:32,464 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi001_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 21:19:32,476 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/278ef6c4b/5bd26da2eb6d4108bd9c950e6b91ec0f/FLAG9856ed35c [2024-06-21 21:19:32,489 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/278ef6c4b/5bd26da2eb6d4108bd9c950e6b91ec0f [2024-06-21 21:19:32,491 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:19:32,491 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:19:32,492 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi001_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 21:19:32,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:19:32,620 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:19:32,621 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:19:32,621 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:19:32,624 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:19:32,625 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:19:32" (1/2) ... [2024-06-21 21:19:32,625 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55b85b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:19:32, skipping insertion in model container [2024-06-21 21:19:32,626 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:19:32" (1/2) ... [2024-06-21 21:19:32,627 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@326f74a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:19:32, skipping insertion in model container [2024-06-21 21:19:32,627 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:19:32" (2/2) ... [2024-06-21 21:19:32,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55b85b9b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:32, skipping insertion in model container [2024-06-21 21:19:32,628 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:19:32" (2/2) ... [2024-06-21 21:19:32,628 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:19:32,679 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:19:32,681 INFO L97 edCorrectnessWitness]: Location invariant before [L818-L818] (((((((((((((((! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (z == 0 || z == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-21 21:19:32,681 INFO L97 edCorrectnessWitness]: Location invariant before [L819-L819] (((((((((((((((! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (z == 0 || z == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-21 21:19:32,681 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:19:32,681 INFO L106 edCorrectnessWitness]: ghost_update [L816-L816] multithreaded = 1; [2024-06-21 21:19:32,717 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:19:32,992 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:19:32,999 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:19:33,099 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:19:33,134 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:19:33,134 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:33 WrapperNode [2024-06-21 21:19:33,134 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:19:33,135 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:19:33,135 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:19:33,135 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:19:33,140 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:33" (1/1) ... [2024-06-21 21:19:33,152 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:33" (1/1) ... [2024-06-21 21:19:33,181 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 114 [2024-06-21 21:19:33,182 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:19:33,182 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:19:33,182 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:19:33,182 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:19:33,190 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:33" (1/1) ... [2024-06-21 21:19:33,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:33" (1/1) ... [2024-06-21 21:19:33,193 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:33" (1/1) ... [2024-06-21 21:19:33,204 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 21:19:33,204 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:33" (1/1) ... [2024-06-21 21:19:33,204 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:33" (1/1) ... [2024-06-21 21:19:33,210 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:33" (1/1) ... [2024-06-21 21:19:33,212 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:33" (1/1) ... [2024-06-21 21:19:33,213 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:33" (1/1) ... [2024-06-21 21:19:33,214 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:33" (1/1) ... [2024-06-21 21:19:33,217 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:19:33,218 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:19:33,218 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:19:33,218 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:19:33,218 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:33" (1/1) ... [2024-06-21 21:19:33,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:19:33,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:19:33,254 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:19:33,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:19:33,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:19:33,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:19:33,284 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:19:33,284 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:19:33,285 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:19:33,285 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:19:33,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:19:33,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:19:33,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:19:33,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:19:33,287 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:19:33,405 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:19:33,407 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:19:33,666 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:19:33,666 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:19:33,784 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:19:33,784 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:19:33,785 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:19:33 BoogieIcfgContainer [2024-06-21 21:19:33,785 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:19:33,787 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:19:33,787 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:19:33,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:19:33,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:19:32" (1/4) ... [2024-06-21 21:19:33,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a411326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:19:33, skipping insertion in model container [2024-06-21 21:19:33,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:19:32" (2/4) ... [2024-06-21 21:19:33,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a411326 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:19:33, skipping insertion in model container [2024-06-21 21:19:33,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:33" (3/4) ... [2024-06-21 21:19:33,795 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a411326 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:19:33, skipping insertion in model container [2024-06-21 21:19:33,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:19:33" (4/4) ... [2024-06-21 21:19:33,796 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi001_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 21:19:33,808 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:19:33,809 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 21:19:33,809 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:19:33,841 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:19:33,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 21:19:33,895 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-21 21:19:33,895 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:19:33,896 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 41 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. [2024-06-21 21:19:33,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 21:19:33,900 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-21 21:19:33,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:19:33,918 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;@3a7480ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:19:33,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 21:19:33,922 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:19:33,922 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:19:33,922 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:19:33,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:33,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:19:33,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:33,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:33,927 INFO L85 PathProgramCache]: Analyzing trace with hash 332828771, now seen corresponding path program 1 times [2024-06-21 21:19:33,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:33,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517388384] [2024-06-21 21:19:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:33,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:34,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:34,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517388384] [2024-06-21 21:19:34,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517388384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:34,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:34,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:19:34,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544328252] [2024-06-21 21:19:34,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:34,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:19:34,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:34,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:19:34,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:19:34,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 21:19:34,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:34,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:34,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 21:19:34,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:34,926 INFO L124 PetriNetUnfolderBase]: 189/351 cut-off events. [2024-06-21 21:19:34,927 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-21 21:19:34,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 351 events. 189/351 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1290 event pairs, 115 based on Foata normal form. 1/338 useless extension candidates. Maximal degree in co-relation 696. Up to 333 conditions per place. [2024-06-21 21:19:34,932 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 22 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-21 21:19:34,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 117 flow [2024-06-21 21:19:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:19:34,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:19:34,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-06-21 21:19:34,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-21 21:19:34,944 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 54 transitions. [2024-06-21 21:19:34,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 117 flow [2024-06-21 21:19:34,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 21:19:34,949 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-21 21:19:34,950 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} [2024-06-21 21:19:34,953 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-21 21:19:34,953 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-21 21:19:34,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:34,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:34,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:34,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:19:34,954 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:34,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:34,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2020889858, now seen corresponding path program 1 times [2024-06-21 21:19:34,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:34,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171813320] [2024-06-21 21:19:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:34,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:35,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:35,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171813320] [2024-06-21 21:19:35,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171813320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:35,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:35,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:19:35,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447499329] [2024-06-21 21:19:35,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:35,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:19:35,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:35,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:19:35,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:19:35,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 21:19:35,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:35,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:35,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 21:19:35,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:35,538 INFO L124 PetriNetUnfolderBase]: 186/348 cut-off events. [2024-06-21 21:19:35,538 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-06-21 21:19:35,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 790 conditions, 348 events. 186/348 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1271 event pairs, 94 based on Foata normal form. 2/342 useless extension candidates. Maximal degree in co-relation 778. Up to 319 conditions per place. [2024-06-21 21:19:35,541 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 26 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-21 21:19:35,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 159 flow [2024-06-21 21:19:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:19:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:19:35,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-06-21 21:19:35,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564516129032258 [2024-06-21 21:19:35,543 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 69 transitions. [2024-06-21 21:19:35,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 159 flow [2024-06-21 21:19:35,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:19:35,544 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-21 21:19:35,544 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} [2024-06-21 21:19:35,545 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-21 21:19:35,545 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-21 21:19:35,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:35,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:35,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:35,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:19:35,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:35,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:35,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1776923130, now seen corresponding path program 1 times [2024-06-21 21:19:35,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:35,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657560169] [2024-06-21 21:19:35,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:35,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:35,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:35,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657560169] [2024-06-21 21:19:35,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657560169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:35,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:35,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:19:35,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383212809] [2024-06-21 21:19:35,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:35,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:19:35,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:35,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:19:35,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:19:36,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 21:19:36,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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) [2024-06-21 21:19:36,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:36,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 21:19:36,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:36,114 INFO L124 PetriNetUnfolderBase]: 187/354 cut-off events. [2024-06-21 21:19:36,114 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2024-06-21 21:19:36,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 354 events. 187/354 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1309 event pairs, 67 based on Foata normal form. 3/355 useless extension candidates. Maximal degree in co-relation 868. Up to 293 conditions per place. [2024-06-21 21:19:36,118 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 34 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-06-21 21:19:36,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 49 transitions, 251 flow [2024-06-21 21:19:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:19:36,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:19:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 21:19:36,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-21 21:19:36,122 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 90 transitions. [2024-06-21 21:19:36,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 49 transitions, 251 flow [2024-06-21 21:19:36,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 49 transitions, 242 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 21:19:36,126 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 162 flow [2024-06-21 21:19:36,126 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} [2024-06-21 21:19:36,127 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2024-06-21 21:19:36,128 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 162 flow [2024-06-21 21:19:36,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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) [2024-06-21 21:19:36,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:36,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:36,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:19:36,128 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:36,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:36,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1414893681, now seen corresponding path program 1 times [2024-06-21 21:19:36,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:36,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269046610] [2024-06-21 21:19:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:36,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:36,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:36,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269046610] [2024-06-21 21:19:36,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269046610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:36,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:36,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:19:36,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708137691] [2024-06-21 21:19:36,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:36,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:19:36,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:36,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:19:36,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:19:36,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 21:19:36,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:36,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:36,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 21:19:36,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:36,841 INFO L124 PetriNetUnfolderBase]: 188/356 cut-off events. [2024-06-21 21:19:36,841 INFO L125 PetriNetUnfolderBase]: For 417/417 co-relation queries the response was YES. [2024-06-21 21:19:36,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 356 events. 188/356 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1311 event pairs, 46 based on Foata normal form. 3/357 useless extension candidates. Maximal degree in co-relation 1042. Up to 282 conditions per place. [2024-06-21 21:19:36,844 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 38 selfloop transitions, 14 changer transitions 0/56 dead transitions. [2024-06-21 21:19:36,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 56 transitions, 336 flow [2024-06-21 21:19:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:19:36,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:19:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 21:19:36,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2024-06-21 21:19:36,848 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 162 flow. Second operand 6 states and 106 transitions. [2024-06-21 21:19:36,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 56 transitions, 336 flow [2024-06-21 21:19:36,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 332 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 21:19:36,852 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 214 flow [2024-06-21 21:19:36,852 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=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 21:19:36,854 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-06-21 21:19:36,854 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 214 flow [2024-06-21 21:19:36,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:36,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:36,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:36,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:19:36,855 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:36,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:36,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1773879685, now seen corresponding path program 1 times [2024-06-21 21:19:36,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:36,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883811076] [2024-06-21 21:19:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:36,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:37,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:37,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883811076] [2024-06-21 21:19:37,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883811076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:37,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:37,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:19:37,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651528463] [2024-06-21 21:19:37,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:37,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:19:37,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:37,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:19:37,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:19:37,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 21:19:37,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 214 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-21 21:19:37,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:37,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 21:19:37,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:37,634 INFO L124 PetriNetUnfolderBase]: 189/359 cut-off events. [2024-06-21 21:19:37,635 INFO L125 PetriNetUnfolderBase]: For 640/640 co-relation queries the response was YES. [2024-06-21 21:19:37,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1192 conditions, 359 events. 189/359 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1327 event pairs, 24 based on Foata normal form. 6/363 useless extension candidates. Maximal degree in co-relation 1172. Up to 259 conditions per place. [2024-06-21 21:19:37,637 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 38 selfloop transitions, 16 changer transitions 0/58 dead transitions. [2024-06-21 21:19:37,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 382 flow [2024-06-21 21:19:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 21:19:37,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5391705069124424 [2024-06-21 21:19:37,639 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 214 flow. Second operand 7 states and 117 transitions. [2024-06-21 21:19:37,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 382 flow [2024-06-21 21:19:37,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 350 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:37,643 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 217 flow [2024-06-21 21:19:37,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-06-21 21:19:37,645 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-21 21:19:37,648 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 217 flow [2024-06-21 21:19:37,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-21 21:19:37,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:37,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:37,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:19:37,649 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:37,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:37,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1502486617, now seen corresponding path program 1 times [2024-06-21 21:19:37,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:37,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122083014] [2024-06-21 21:19:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:37,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:38,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:38,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122083014] [2024-06-21 21:19:38,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122083014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:38,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:38,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:19:38,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674193062] [2024-06-21 21:19:38,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:38,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:19:38,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:38,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:19:38,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:19:38,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:19:38,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 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) [2024-06-21 21:19:38,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:38,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:19:38,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:38,232 INFO L124 PetriNetUnfolderBase]: 187/355 cut-off events. [2024-06-21 21:19:38,233 INFO L125 PetriNetUnfolderBase]: For 747/747 co-relation queries the response was YES. [2024-06-21 21:19:38,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1239 conditions, 355 events. 187/355 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1302 event pairs, 47 based on Foata normal form. 1/354 useless extension candidates. Maximal degree in co-relation 1217. Up to 329 conditions per place. [2024-06-21 21:19:38,236 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 34 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2024-06-21 21:19:38,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 309 flow [2024-06-21 21:19:38,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:19:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:19:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-06-21 21:19:38,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-21 21:19:38,237 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 217 flow. Second operand 5 states and 64 transitions. [2024-06-21 21:19:38,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 309 flow [2024-06-21 21:19:38,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 268 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:38,240 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 193 flow [2024-06-21 21:19:38,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-06-21 21:19:38,243 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-21 21:19:38,243 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 193 flow [2024-06-21 21:19:38,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 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) [2024-06-21 21:19:38,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:38,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:38,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:19:38,244 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:38,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:38,244 INFO L85 PathProgramCache]: Analyzing trace with hash -696182331, now seen corresponding path program 1 times [2024-06-21 21:19:38,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:38,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077589444] [2024-06-21 21:19:38,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:38,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:38,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:38,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077589444] [2024-06-21 21:19:38,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077589444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:38,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:38,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:19:38,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808321669] [2024-06-21 21:19:38,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:38,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:19:38,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:38,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:19:38,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:19:38,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:38,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 193 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:38,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:38,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:38,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:38,928 INFO L124 PetriNetUnfolderBase]: 212/382 cut-off events. [2024-06-21 21:19:38,928 INFO L125 PetriNetUnfolderBase]: For 1031/1031 co-relation queries the response was YES. [2024-06-21 21:19:38,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1324 conditions, 382 events. 212/382 cut-off events. For 1031/1031 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1353 event pairs, 55 based on Foata normal form. 1/381 useless extension candidates. Maximal degree in co-relation 1300. Up to 368 conditions per place. [2024-06-21 21:19:38,931 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 36 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2024-06-21 21:19:38,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 303 flow [2024-06-21 21:19:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:19:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:19:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2024-06-21 21:19:38,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:19:38,933 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 193 flow. Second operand 6 states and 69 transitions. [2024-06-21 21:19:38,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 303 flow [2024-06-21 21:19:38,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 288 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:38,935 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 211 flow [2024-06-21 21:19:38,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-06-21 21:19:38,936 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2024-06-21 21:19:38,936 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 211 flow [2024-06-21 21:19:38,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:38,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:38,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:38,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:19:38,937 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:38,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:38,937 INFO L85 PathProgramCache]: Analyzing trace with hash -479738274, now seen corresponding path program 1 times [2024-06-21 21:19:38,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:38,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406517938] [2024-06-21 21:19:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:38,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:39,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:39,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406517938] [2024-06-21 21:19:39,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406517938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:39,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:39,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:19:39,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928147851] [2024-06-21 21:19:39,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:39,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:19:39,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:39,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:19:39,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:19:39,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:19:39,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:39,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:39,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:19:39,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:39,617 INFO L124 PetriNetUnfolderBase]: 219/407 cut-off events. [2024-06-21 21:19:39,618 INFO L125 PetriNetUnfolderBase]: For 1405/1405 co-relation queries the response was YES. [2024-06-21 21:19:39,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1507 conditions, 407 events. 219/407 cut-off events. For 1405/1405 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1516 event pairs, 57 based on Foata normal form. 2/407 useless extension candidates. Maximal degree in co-relation 1483. Up to 351 conditions per place. [2024-06-21 21:19:39,620 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 40 selfloop transitions, 15 changer transitions 0/59 dead transitions. [2024-06-21 21:19:39,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 427 flow [2024-06-21 21:19:39,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:39,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-06-21 21:19:39,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4055299539170507 [2024-06-21 21:19:39,621 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 211 flow. Second operand 7 states and 88 transitions. [2024-06-21 21:19:39,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 427 flow [2024-06-21 21:19:39,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 408 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:39,624 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 314 flow [2024-06-21 21:19:39,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=314, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-21 21:19:39,625 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2024-06-21 21:19:39,625 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 314 flow [2024-06-21 21:19:39,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:39,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:39,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:39,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:19:39,626 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:39,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:39,626 INFO L85 PathProgramCache]: Analyzing trace with hash 780651192, now seen corresponding path program 2 times [2024-06-21 21:19:39,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:39,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718449650] [2024-06-21 21:19:39,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:39,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:40,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:40,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718449650] [2024-06-21 21:19:40,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718449650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:40,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:40,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:19:40,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605481761] [2024-06-21 21:19:40,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:40,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:19:40,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:40,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:19:40,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:19:40,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:19:40,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:40,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:40,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:19:40,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:40,208 INFO L124 PetriNetUnfolderBase]: 216/402 cut-off events. [2024-06-21 21:19:40,208 INFO L125 PetriNetUnfolderBase]: For 1729/1729 co-relation queries the response was YES. [2024-06-21 21:19:40,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 402 events. 216/402 cut-off events. For 1729/1729 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1504 event pairs, 56 based on Foata normal form. 1/401 useless extension candidates. Maximal degree in co-relation 1568. Up to 369 conditions per place. [2024-06-21 21:19:40,211 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 43 selfloop transitions, 9 changer transitions 0/56 dead transitions. [2024-06-21 21:19:40,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 56 transitions, 440 flow [2024-06-21 21:19:40,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:19:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:19:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-06-21 21:19:40,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 21:19:40,212 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 314 flow. Second operand 6 states and 74 transitions. [2024-06-21 21:19:40,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 56 transitions, 440 flow [2024-06-21 21:19:40,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 56 transitions, 436 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 21:19:40,215 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 345 flow [2024-06-21 21:19:40,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-06-21 21:19:40,216 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 29 predicate places. [2024-06-21 21:19:40,216 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 345 flow [2024-06-21 21:19:40,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:40,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:40,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:40,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:19:40,216 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:40,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:40,217 INFO L85 PathProgramCache]: Analyzing trace with hash -734173414, now seen corresponding path program 3 times [2024-06-21 21:19:40,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:40,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414638239] [2024-06-21 21:19:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:40,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:40,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:40,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414638239] [2024-06-21 21:19:40,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414638239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:40,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:40,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:19:40,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721555816] [2024-06-21 21:19:40,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:40,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:19:40,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:40,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:19:40,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:19:40,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:19:40,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 345 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:40,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:40,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:19:40,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:40,849 INFO L124 PetriNetUnfolderBase]: 209/389 cut-off events. [2024-06-21 21:19:40,849 INFO L125 PetriNetUnfolderBase]: For 2102/2102 co-relation queries the response was YES. [2024-06-21 21:19:40,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1588 conditions, 389 events. 209/389 cut-off events. For 2102/2102 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1447 event pairs, 52 based on Foata normal form. 2/389 useless extension candidates. Maximal degree in co-relation 1558. Up to 311 conditions per place. [2024-06-21 21:19:40,852 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 39 selfloop transitions, 20 changer transitions 0/63 dead transitions. [2024-06-21 21:19:40,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 508 flow [2024-06-21 21:19:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-06-21 21:19:40,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43317972350230416 [2024-06-21 21:19:40,853 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 345 flow. Second operand 7 states and 94 transitions. [2024-06-21 21:19:40,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 508 flow [2024-06-21 21:19:40,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 489 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:40,856 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 398 flow [2024-06-21 21:19:40,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2024-06-21 21:19:40,857 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-06-21 21:19:40,857 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 398 flow [2024-06-21 21:19:40,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:40,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:40,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:40,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:19:40,858 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:40,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:40,859 INFO L85 PathProgramCache]: Analyzing trace with hash 780659128, now seen corresponding path program 1 times [2024-06-21 21:19:40,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:40,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597244719] [2024-06-21 21:19:40,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:40,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:41,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:41,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597244719] [2024-06-21 21:19:41,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597244719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:41,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:41,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:41,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259716918] [2024-06-21 21:19:41,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:41,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:41,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:41,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:41,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:41,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:41,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 398 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:41,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:41,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:41,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:41,646 INFO L124 PetriNetUnfolderBase]: 219/396 cut-off events. [2024-06-21 21:19:41,646 INFO L125 PetriNetUnfolderBase]: For 2442/2442 co-relation queries the response was YES. [2024-06-21 21:19:41,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1689 conditions, 396 events. 219/396 cut-off events. For 2442/2442 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1402 event pairs, 56 based on Foata normal form. 3/397 useless extension candidates. Maximal degree in co-relation 1657. Up to 371 conditions per place. [2024-06-21 21:19:41,649 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 50 selfloop transitions, 11 changer transitions 0/63 dead transitions. [2024-06-21 21:19:41,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 548 flow [2024-06-21 21:19:41,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:41,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:41,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-21 21:19:41,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-21 21:19:41,651 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 398 flow. Second operand 7 states and 80 transitions. [2024-06-21 21:19:41,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 548 flow [2024-06-21 21:19:41,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 487 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:41,655 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 378 flow [2024-06-21 21:19:41,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=378, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2024-06-21 21:19:41,656 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-21 21:19:41,657 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 378 flow [2024-06-21 21:19:41,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:41,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:41,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:41,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:19:41,658 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:41,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:41,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1986983618, now seen corresponding path program 1 times [2024-06-21 21:19:41,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:41,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798624732] [2024-06-21 21:19:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:41,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:42,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:42,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798624732] [2024-06-21 21:19:42,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798624732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:42,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:42,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:42,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589026640] [2024-06-21 21:19:42,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:42,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:42,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:42,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:42,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:42,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:42,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 378 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:42,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:42,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:42,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:42,301 INFO L124 PetriNetUnfolderBase]: 225/406 cut-off events. [2024-06-21 21:19:42,302 INFO L125 PetriNetUnfolderBase]: For 2651/2651 co-relation queries the response was YES. [2024-06-21 21:19:42,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1719 conditions, 406 events. 225/406 cut-off events. For 2651/2651 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1444 event pairs, 54 based on Foata normal form. 2/406 useless extension candidates. Maximal degree in co-relation 1687. Up to 315 conditions per place. [2024-06-21 21:19:42,304 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 43 selfloop transitions, 25 changer transitions 0/70 dead transitions. [2024-06-21 21:19:42,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 70 transitions, 586 flow [2024-06-21 21:19:42,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-21 21:19:42,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41013824884792627 [2024-06-21 21:19:42,305 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 378 flow. Second operand 7 states and 89 transitions. [2024-06-21 21:19:42,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 70 transitions, 586 flow [2024-06-21 21:19:42,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 561 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:42,309 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 438 flow [2024-06-21 21:19:42,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=438, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2024-06-21 21:19:42,310 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-06-21 21:19:42,310 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 438 flow [2024-06-21 21:19:42,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:42,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:42,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:42,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:19:42,310 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:42,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:42,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1569378686, now seen corresponding path program 2 times [2024-06-21 21:19:42,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:42,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043583886] [2024-06-21 21:19:42,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:42,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:42,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:42,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043583886] [2024-06-21 21:19:42,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043583886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:42,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:42,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:42,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175340014] [2024-06-21 21:19:42,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:42,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:42,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:42,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:42,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:42,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:42,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 438 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:42,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:42,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:42,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:42,972 INFO L124 PetriNetUnfolderBase]: 228/411 cut-off events. [2024-06-21 21:19:42,972 INFO L125 PetriNetUnfolderBase]: For 3064/3064 co-relation queries the response was YES. [2024-06-21 21:19:42,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1850 conditions, 411 events. 228/411 cut-off events. For 3064/3064 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1477 event pairs, 54 based on Foata normal form. 1/410 useless extension candidates. Maximal degree in co-relation 1817. Up to 392 conditions per place. [2024-06-21 21:19:42,975 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 55 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-21 21:19:42,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 598 flow [2024-06-21 21:19:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-21 21:19:42,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-21 21:19:42,976 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 438 flow. Second operand 7 states and 78 transitions. [2024-06-21 21:19:42,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 598 flow [2024-06-21 21:19:42,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 68 transitions, 572 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:42,980 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 457 flow [2024-06-21 21:19:42,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=457, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2024-06-21 21:19:42,981 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2024-06-21 21:19:42,982 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 457 flow [2024-06-21 21:19:42,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:42,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:42,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:42,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:19:42,982 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:42,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:42,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1982341988, now seen corresponding path program 3 times [2024-06-21 21:19:42,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:42,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105722028] [2024-06-21 21:19:42,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:42,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:43,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:43,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105722028] [2024-06-21 21:19:43,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105722028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:43,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:43,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:43,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779236396] [2024-06-21 21:19:43,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:43,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:43,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:43,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:43,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:43,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:43,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 457 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:43,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:43,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:43,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:43,666 INFO L124 PetriNetUnfolderBase]: 226/408 cut-off events. [2024-06-21 21:19:43,666 INFO L125 PetriNetUnfolderBase]: For 3501/3501 co-relation queries the response was YES. [2024-06-21 21:19:43,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1890 conditions, 408 events. 226/408 cut-off events. For 3501/3501 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1460 event pairs, 54 based on Foata normal form. 1/407 useless extension candidates. Maximal degree in co-relation 1855. Up to 383 conditions per place. [2024-06-21 21:19:43,669 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 54 selfloop transitions, 14 changer transitions 0/70 dead transitions. [2024-06-21 21:19:43,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 70 transitions, 625 flow [2024-06-21 21:19:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:43,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-21 21:19:43,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-21 21:19:43,670 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 457 flow. Second operand 7 states and 80 transitions. [2024-06-21 21:19:43,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 70 transitions, 625 flow [2024-06-21 21:19:43,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 598 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:43,678 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 485 flow [2024-06-21 21:19:43,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=485, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2024-06-21 21:19:43,678 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2024-06-21 21:19:43,679 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 485 flow [2024-06-21 21:19:43,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:43,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:43,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:43,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:19:43,679 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:43,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:43,680 INFO L85 PathProgramCache]: Analyzing trace with hash -777291083, now seen corresponding path program 1 times [2024-06-21 21:19:43,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:43,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992755242] [2024-06-21 21:19:43,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:43,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:44,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:44,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992755242] [2024-06-21 21:19:44,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992755242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:44,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:44,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:44,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838667453] [2024-06-21 21:19:44,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:44,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:44,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:44,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:44,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:19:44,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 485 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:44,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:44,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:19:44,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:44,555 INFO L124 PetriNetUnfolderBase]: 214/395 cut-off events. [2024-06-21 21:19:44,555 INFO L125 PetriNetUnfolderBase]: For 4046/4046 co-relation queries the response was YES. [2024-06-21 21:19:44,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1879 conditions, 395 events. 214/395 cut-off events. For 4046/4046 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1427 event pairs, 50 based on Foata normal form. 1/394 useless extension candidates. Maximal degree in co-relation 1843. Up to 288 conditions per place. [2024-06-21 21:19:44,557 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 43 selfloop transitions, 27 changer transitions 0/78 dead transitions. [2024-06-21 21:19:44,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 78 transitions, 671 flow [2024-06-21 21:19:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-21 21:19:44,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42338709677419356 [2024-06-21 21:19:44,559 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 485 flow. Second operand 8 states and 105 transitions. [2024-06-21 21:19:44,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 78 transitions, 671 flow [2024-06-21 21:19:44,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 634 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:44,564 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 525 flow [2024-06-21 21:19:44,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=525, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-06-21 21:19:44,565 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2024-06-21 21:19:44,565 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 525 flow [2024-06-21 21:19:44,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:44,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:44,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:44,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:19:44,566 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:44,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:44,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1466949212, now seen corresponding path program 1 times [2024-06-21 21:19:44,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:44,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836054402] [2024-06-21 21:19:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:44,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:45,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:45,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836054402] [2024-06-21 21:19:45,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836054402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:45,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:45,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:45,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001876867] [2024-06-21 21:19:45,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:45,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:45,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:45,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:45,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:45,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:45,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 525 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:45,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:45,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:45,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:45,234 INFO L124 PetriNetUnfolderBase]: 232/418 cut-off events. [2024-06-21 21:19:45,234 INFO L125 PetriNetUnfolderBase]: For 4644/4644 co-relation queries the response was YES. [2024-06-21 21:19:45,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2087 conditions, 418 events. 232/418 cut-off events. For 4644/4644 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1483 event pairs, 55 based on Foata normal form. 1/417 useless extension candidates. Maximal degree in co-relation 2050. Up to 323 conditions per place. [2024-06-21 21:19:45,237 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 49 selfloop transitions, 29 changer transitions 0/80 dead transitions. [2024-06-21 21:19:45,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 797 flow [2024-06-21 21:19:45,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:45,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-21 21:19:45,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41013824884792627 [2024-06-21 21:19:45,238 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 525 flow. Second operand 7 states and 89 transitions. [2024-06-21 21:19:45,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 797 flow [2024-06-21 21:19:45,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 80 transitions, 740 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:45,244 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 564 flow [2024-06-21 21:19:45,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=564, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2024-06-21 21:19:45,245 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-21 21:19:45,245 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 564 flow [2024-06-21 21:19:45,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:45,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:45,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:45,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:19:45,246 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:45,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:45,246 INFO L85 PathProgramCache]: Analyzing trace with hash -773475851, now seen corresponding path program 1 times [2024-06-21 21:19:45,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:45,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50282516] [2024-06-21 21:19:45,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:45,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:45,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:45,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50282516] [2024-06-21 21:19:45,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50282516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:45,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:45,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:45,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192734071] [2024-06-21 21:19:45,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:45,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:45,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:45,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:45,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:45,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:45,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 564 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:45,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:45,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:45,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:46,056 INFO L124 PetriNetUnfolderBase]: 270/480 cut-off events. [2024-06-21 21:19:46,057 INFO L125 PetriNetUnfolderBase]: For 6384/6384 co-relation queries the response was YES. [2024-06-21 21:19:46,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2411 conditions, 480 events. 270/480 cut-off events. For 6384/6384 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1800 event pairs, 60 based on Foata normal form. 6/484 useless extension candidates. Maximal degree in co-relation 2373. Up to 311 conditions per place. [2024-06-21 21:19:46,060 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 58 selfloop transitions, 32 changer transitions 0/92 dead transitions. [2024-06-21 21:19:46,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 92 transitions, 858 flow [2024-06-21 21:19:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:46,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-21 21:19:46,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42338709677419356 [2024-06-21 21:19:46,063 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 564 flow. Second operand 8 states and 105 transitions. [2024-06-21 21:19:46,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 92 transitions, 858 flow [2024-06-21 21:19:46,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 92 transitions, 823 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:46,077 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 654 flow [2024-06-21 21:19:46,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=654, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2024-06-21 21:19:46,078 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2024-06-21 21:19:46,078 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 654 flow [2024-06-21 21:19:46,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:46,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:46,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:46,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:19:46,079 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:46,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:46,079 INFO L85 PathProgramCache]: Analyzing trace with hash -773481648, now seen corresponding path program 2 times [2024-06-21 21:19:46,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:46,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508320987] [2024-06-21 21:19:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:46,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:46,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:46,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508320987] [2024-06-21 21:19:46,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508320987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:46,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:46,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:46,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572083317] [2024-06-21 21:19:46,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:46,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:46,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:46,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:46,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:46,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:46,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 654 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:46,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:46,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:46,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:46,765 INFO L124 PetriNetUnfolderBase]: 268/476 cut-off events. [2024-06-21 21:19:46,765 INFO L125 PetriNetUnfolderBase]: For 6375/6377 co-relation queries the response was YES. [2024-06-21 21:19:46,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2562 conditions, 476 events. 268/476 cut-off events. For 6375/6377 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1779 event pairs, 61 based on Foata normal form. 3/477 useless extension candidates. Maximal degree in co-relation 2522. Up to 383 conditions per place. [2024-06-21 21:19:46,769 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 54 selfloop transitions, 33 changer transitions 0/89 dead transitions. [2024-06-21 21:19:46,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 89 transitions, 895 flow [2024-06-21 21:19:46,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-21 21:19:46,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423963133640553 [2024-06-21 21:19:46,770 INFO L175 Difference]: Start difference. First operand has 83 places, 77 transitions, 654 flow. Second operand 7 states and 92 transitions. [2024-06-21 21:19:46,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 89 transitions, 895 flow [2024-06-21 21:19:46,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 89 transitions, 858 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:46,778 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 689 flow [2024-06-21 21:19:46,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=689, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2024-06-21 21:19:46,779 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-21 21:19:46,779 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 689 flow [2024-06-21 21:19:46,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:46,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:46,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:46,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:19:46,780 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:46,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:46,781 INFO L85 PathProgramCache]: Analyzing trace with hash 418828349, now seen corresponding path program 2 times [2024-06-21 21:19:46,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:46,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816258302] [2024-06-21 21:19:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:46,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:47,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:47,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816258302] [2024-06-21 21:19:47,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816258302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:47,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:47,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:47,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235748611] [2024-06-21 21:19:47,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:47,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:47,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:47,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:47,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:47,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:47,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 689 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:47,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:47,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:47,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:47,508 INFO L124 PetriNetUnfolderBase]: 277/492 cut-off events. [2024-06-21 21:19:47,508 INFO L125 PetriNetUnfolderBase]: For 7598/7598 co-relation queries the response was YES. [2024-06-21 21:19:47,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 492 events. 277/492 cut-off events. For 7598/7598 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1846 event pairs, 59 based on Foata normal form. 3/493 useless extension candidates. Maximal degree in co-relation 2649. Up to 439 conditions per place. [2024-06-21 21:19:47,511 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 73 selfloop transitions, 18 changer transitions 0/93 dead transitions. [2024-06-21 21:19:47,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 93 transitions, 977 flow [2024-06-21 21:19:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 21:19:47,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:19:47,513 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 689 flow. Second operand 8 states and 96 transitions. [2024-06-21 21:19:47,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 93 transitions, 977 flow [2024-06-21 21:19:47,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 93 transitions, 897 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:47,522 INFO L231 Difference]: Finished difference. Result has 89 places, 81 transitions, 694 flow [2024-06-21 21:19:47,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=694, PETRI_PLACES=89, PETRI_TRANSITIONS=81} [2024-06-21 21:19:47,523 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-06-21 21:19:47,523 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 81 transitions, 694 flow [2024-06-21 21:19:47,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:47,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:47,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:47,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:19:47,523 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:47,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:47,524 INFO L85 PathProgramCache]: Analyzing trace with hash 430252533, now seen corresponding path program 3 times [2024-06-21 21:19:47,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:47,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110967041] [2024-06-21 21:19:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:47,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:47,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:47,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110967041] [2024-06-21 21:19:47,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110967041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:47,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:47,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:47,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182620103] [2024-06-21 21:19:47,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:47,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:47,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:47,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:47,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:48,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:48,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 81 transitions, 694 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:48,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:48,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:48,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:48,296 INFO L124 PetriNetUnfolderBase]: 286/507 cut-off events. [2024-06-21 21:19:48,297 INFO L125 PetriNetUnfolderBase]: For 8475/8475 co-relation queries the response was YES. [2024-06-21 21:19:48,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 507 events. 286/507 cut-off events. For 8475/8475 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1911 event pairs, 59 based on Foata normal form. 3/508 useless extension candidates. Maximal degree in co-relation 2748. Up to 479 conditions per place. [2024-06-21 21:19:48,300 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 77 selfloop transitions, 13 changer transitions 0/92 dead transitions. [2024-06-21 21:19:48,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 920 flow [2024-06-21 21:19:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:48,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 21:19:48,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-21 21:19:48,302 INFO L175 Difference]: Start difference. First operand has 89 places, 81 transitions, 694 flow. Second operand 8 states and 89 transitions. [2024-06-21 21:19:48,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 920 flow [2024-06-21 21:19:48,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 92 transitions, 890 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:48,311 INFO L231 Difference]: Finished difference. Result has 93 places, 83 transitions, 723 flow [2024-06-21 21:19:48,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=723, PETRI_PLACES=93, PETRI_TRANSITIONS=83} [2024-06-21 21:19:48,311 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2024-06-21 21:19:48,311 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 83 transitions, 723 flow [2024-06-21 21:19:48,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:48,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:48,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:48,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:19:48,312 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:48,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:48,312 INFO L85 PathProgramCache]: Analyzing trace with hash 429985623, now seen corresponding path program 4 times [2024-06-21 21:19:48,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:48,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157845952] [2024-06-21 21:19:48,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:48,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:48,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:48,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157845952] [2024-06-21 21:19:48,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157845952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:48,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:48,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:48,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434531912] [2024-06-21 21:19:48,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:48,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:48,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:48,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:48,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:48,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:48,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 83 transitions, 723 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:48,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:48,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:48,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:49,167 INFO L124 PetriNetUnfolderBase]: 280/498 cut-off events. [2024-06-21 21:19:49,167 INFO L125 PetriNetUnfolderBase]: For 8509/8509 co-relation queries the response was YES. [2024-06-21 21:19:49,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2730 conditions, 498 events. 280/498 cut-off events. For 8509/8509 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1864 event pairs, 57 based on Foata normal form. 3/499 useless extension candidates. Maximal degree in co-relation 2685. Up to 458 conditions per place. [2024-06-21 21:19:49,171 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 75 selfloop transitions, 17 changer transitions 0/94 dead transitions. [2024-06-21 21:19:49,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 94 transitions, 935 flow [2024-06-21 21:19:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-21 21:19:49,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-21 21:19:49,172 INFO L175 Difference]: Start difference. First operand has 93 places, 83 transitions, 723 flow. Second operand 9 states and 100 transitions. [2024-06-21 21:19:49,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 94 transitions, 935 flow [2024-06-21 21:19:49,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 94 transitions, 886 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:49,182 INFO L231 Difference]: Finished difference. Result has 96 places, 83 transitions, 713 flow [2024-06-21 21:19:49,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=713, PETRI_PLACES=96, PETRI_TRANSITIONS=83} [2024-06-21 21:19:49,183 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2024-06-21 21:19:49,183 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 83 transitions, 713 flow [2024-06-21 21:19:49,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:49,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:49,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:49,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:19:49,184 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:49,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:49,184 INFO L85 PathProgramCache]: Analyzing trace with hash 429985406, now seen corresponding path program 3 times [2024-06-21 21:19:49,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:49,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249978226] [2024-06-21 21:19:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:49,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:49,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:49,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249978226] [2024-06-21 21:19:49,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249978226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:49,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:49,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:49,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135815395] [2024-06-21 21:19:49,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:49,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:49,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:49,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:49,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:49,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:49,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 83 transitions, 713 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:49,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:49,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:49,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:49,890 INFO L124 PetriNetUnfolderBase]: 278/495 cut-off events. [2024-06-21 21:19:49,890 INFO L125 PetriNetUnfolderBase]: For 8275/8275 co-relation queries the response was YES. [2024-06-21 21:19:49,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2688 conditions, 495 events. 278/495 cut-off events. For 8275/8275 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1863 event pairs, 58 based on Foata normal form. 1/494 useless extension candidates. Maximal degree in co-relation 2642. Up to 473 conditions per place. [2024-06-21 21:19:49,894 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 74 selfloop transitions, 13 changer transitions 0/89 dead transitions. [2024-06-21 21:19:49,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 89 transitions, 901 flow [2024-06-21 21:19:49,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-21 21:19:49,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-21 21:19:49,895 INFO L175 Difference]: Start difference. First operand has 96 places, 83 transitions, 713 flow. Second operand 8 states and 86 transitions. [2024-06-21 21:19:49,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 89 transitions, 901 flow [2024-06-21 21:19:49,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 89 transitions, 841 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 21:19:49,906 INFO L231 Difference]: Finished difference. Result has 95 places, 83 transitions, 684 flow [2024-06-21 21:19:49,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=684, PETRI_PLACES=95, PETRI_TRANSITIONS=83} [2024-06-21 21:19:49,906 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-06-21 21:19:49,906 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 83 transitions, 684 flow [2024-06-21 21:19:49,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:49,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:49,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:49,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:19:49,907 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:49,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:49,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1650889633, now seen corresponding path program 1 times [2024-06-21 21:19:49,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:49,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612227985] [2024-06-21 21:19:49,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:49,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:50,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:50,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612227985] [2024-06-21 21:19:50,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612227985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:50,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:50,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:50,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404745083] [2024-06-21 21:19:50,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:50,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:50,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:50,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:50,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:50,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:19:50,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 83 transitions, 684 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 21:19:50,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:50,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:19:50,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:50,842 INFO L124 PetriNetUnfolderBase]: 269/490 cut-off events. [2024-06-21 21:19:50,843 INFO L125 PetriNetUnfolderBase]: For 9222/9222 co-relation queries the response was YES. [2024-06-21 21:19:50,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2656 conditions, 490 events. 269/490 cut-off events. For 9222/9222 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1902 event pairs, 36 based on Foata normal form. 2/490 useless extension candidates. Maximal degree in co-relation 2610. Up to 339 conditions per place. [2024-06-21 21:19:50,846 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 65 selfloop transitions, 24 changer transitions 0/99 dead transitions. [2024-06-21 21:19:50,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 99 transitions, 956 flow [2024-06-21 21:19:50,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-21 21:19:50,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 21:19:50,847 INFO L175 Difference]: Start difference. First operand has 95 places, 83 transitions, 684 flow. Second operand 8 states and 104 transitions. [2024-06-21 21:19:50,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 99 transitions, 956 flow [2024-06-21 21:19:50,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 99 transitions, 896 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 21:19:50,859 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 686 flow [2024-06-21 21:19:50,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=686, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2024-06-21 21:19:50,859 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-06-21 21:19:50,860 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 686 flow [2024-06-21 21:19:50,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 21:19:50,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:50,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:50,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:19:50,860 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:50,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:50,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1653631273, now seen corresponding path program 2 times [2024-06-21 21:19:50,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:50,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267614862] [2024-06-21 21:19:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:50,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:51,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:51,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267614862] [2024-06-21 21:19:51,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267614862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:51,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:51,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:51,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778784228] [2024-06-21 21:19:51,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:51,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:51,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:51,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:19:51,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 686 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 21:19:51,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:51,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:19:51,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:51,872 INFO L124 PetriNetUnfolderBase]: 266/485 cut-off events. [2024-06-21 21:19:51,872 INFO L125 PetriNetUnfolderBase]: For 9452/9452 co-relation queries the response was YES. [2024-06-21 21:19:51,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2647 conditions, 485 events. 266/485 cut-off events. For 9452/9452 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1875 event pairs, 51 based on Foata normal form. 2/485 useless extension candidates. Maximal degree in co-relation 2600. Up to 369 conditions per place. [2024-06-21 21:19:51,876 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 60 selfloop transitions, 28 changer transitions 0/98 dead transitions. [2024-06-21 21:19:51,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 900 flow [2024-06-21 21:19:51,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 21:19:51,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 21:19:51,877 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 686 flow. Second operand 9 states and 115 transitions. [2024-06-21 21:19:51,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 900 flow [2024-06-21 21:19:51,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 98 transitions, 845 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:51,888 INFO L231 Difference]: Finished difference. Result has 99 places, 84 transitions, 691 flow [2024-06-21 21:19:51,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=691, PETRI_PLACES=99, PETRI_TRANSITIONS=84} [2024-06-21 21:19:51,889 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2024-06-21 21:19:51,889 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 84 transitions, 691 flow [2024-06-21 21:19:51,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 21:19:51,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:51,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:51,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:19:51,890 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:51,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:51,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1650950207, now seen corresponding path program 1 times [2024-06-21 21:19:51,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:51,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515460499] [2024-06-21 21:19:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:51,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:52,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:52,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515460499] [2024-06-21 21:19:52,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515460499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:52,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:52,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:52,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443819644] [2024-06-21 21:19:52,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:52,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:52,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:52,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:52,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:52,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:52,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 84 transitions, 691 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:52,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:52,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:52,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:52,751 INFO L124 PetriNetUnfolderBase]: 282/503 cut-off events. [2024-06-21 21:19:52,751 INFO L125 PetriNetUnfolderBase]: For 9883/9883 co-relation queries the response was YES. [2024-06-21 21:19:52,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2743 conditions, 503 events. 282/503 cut-off events. For 9883/9883 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1911 event pairs, 53 based on Foata normal form. 1/502 useless extension candidates. Maximal degree in co-relation 2695. Up to 371 conditions per place. [2024-06-21 21:19:52,755 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 62 selfloop transitions, 39 changer transitions 0/103 dead transitions. [2024-06-21 21:19:52,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 1005 flow [2024-06-21 21:19:52,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:19:52,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:19:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 21:19:52,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 21:19:52,756 INFO L175 Difference]: Start difference. First operand has 99 places, 84 transitions, 691 flow. Second operand 10 states and 121 transitions. [2024-06-21 21:19:52,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 1005 flow [2024-06-21 21:19:52,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 103 transitions, 928 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 21:19:52,769 INFO L231 Difference]: Finished difference. Result has 100 places, 88 transitions, 726 flow [2024-06-21 21:19:52,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=726, PETRI_PLACES=100, PETRI_TRANSITIONS=88} [2024-06-21 21:19:52,769 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 70 predicate places. [2024-06-21 21:19:52,770 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 88 transitions, 726 flow [2024-06-21 21:19:52,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:52,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:52,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:52,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:19:52,770 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:52,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1769037887, now seen corresponding path program 2 times [2024-06-21 21:19:52,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:52,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152655855] [2024-06-21 21:19:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:52,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:53,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:53,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152655855] [2024-06-21 21:19:53,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152655855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:53,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:53,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:53,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144816298] [2024-06-21 21:19:53,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:53,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:53,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:53,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:53,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:53,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:53,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 88 transitions, 726 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:53,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:53,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:53,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:53,661 INFO L124 PetriNetUnfolderBase]: 285/507 cut-off events. [2024-06-21 21:19:53,661 INFO L125 PetriNetUnfolderBase]: For 10596/10598 co-relation queries the response was YES. [2024-06-21 21:19:53,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2780 conditions, 507 events. 285/507 cut-off events. For 10596/10598 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1938 event pairs, 51 based on Foata normal form. 3/508 useless extension candidates. Maximal degree in co-relation 2732. Up to 387 conditions per place. [2024-06-21 21:19:53,665 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 65 selfloop transitions, 40 changer transitions 0/107 dead transitions. [2024-06-21 21:19:53,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 107 transitions, 1051 flow [2024-06-21 21:19:53,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 21:19:53,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 21:19:53,667 INFO L175 Difference]: Start difference. First operand has 100 places, 88 transitions, 726 flow. Second operand 9 states and 115 transitions. [2024-06-21 21:19:53,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 107 transitions, 1051 flow [2024-06-21 21:19:53,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 107 transitions, 989 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:53,681 INFO L231 Difference]: Finished difference. Result has 103 places, 90 transitions, 766 flow [2024-06-21 21:19:53,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=766, PETRI_PLACES=103, PETRI_TRANSITIONS=90} [2024-06-21 21:19:53,682 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2024-06-21 21:19:53,682 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 90 transitions, 766 flow [2024-06-21 21:19:53,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:53,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:53,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:53,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:19:53,682 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:53,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:53,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1769042723, now seen corresponding path program 1 times [2024-06-21 21:19:53,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:53,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681100564] [2024-06-21 21:19:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:53,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:54,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:54,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681100564] [2024-06-21 21:19:54,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681100564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:54,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:54,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:54,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828981365] [2024-06-21 21:19:54,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:54,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:54,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:54,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:54,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:54,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:54,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 90 transitions, 766 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:54,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:54,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:54,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:54,400 INFO L124 PetriNetUnfolderBase]: 294/522 cut-off events. [2024-06-21 21:19:54,400 INFO L125 PetriNetUnfolderBase]: For 12113/12115 co-relation queries the response was YES. [2024-06-21 21:19:54,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2915 conditions, 522 events. 294/522 cut-off events. For 12113/12115 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2013 event pairs, 52 based on Foata normal form. 5/525 useless extension candidates. Maximal degree in co-relation 2865. Up to 333 conditions per place. [2024-06-21 21:19:54,404 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 67 selfloop transitions, 42 changer transitions 0/111 dead transitions. [2024-06-21 21:19:54,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 111 transitions, 1103 flow [2024-06-21 21:19:54,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:54,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:54,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2024-06-21 21:19:54,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2024-06-21 21:19:54,405 INFO L175 Difference]: Start difference. First operand has 103 places, 90 transitions, 766 flow. Second operand 8 states and 110 transitions. [2024-06-21 21:19:54,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 111 transitions, 1103 flow [2024-06-21 21:19:54,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 111 transitions, 1019 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:19:54,420 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 785 flow [2024-06-21 21:19:54,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=785, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2024-06-21 21:19:54,420 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2024-06-21 21:19:54,421 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 785 flow [2024-06-21 21:19:54,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:54,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:54,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:54,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:19:54,421 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:54,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:54,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1792046687, now seen corresponding path program 2 times [2024-06-21 21:19:54,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:54,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428038654] [2024-06-21 21:19:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:54,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:54,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:54,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428038654] [2024-06-21 21:19:54,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428038654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:54,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:54,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:54,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832767859] [2024-06-21 21:19:54,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:54,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:54,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:54,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:54,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:55,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:55,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 785 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:55,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:55,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:55,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:55,245 INFO L124 PetriNetUnfolderBase]: 372/651 cut-off events. [2024-06-21 21:19:55,245 INFO L125 PetriNetUnfolderBase]: For 15533/15533 co-relation queries the response was YES. [2024-06-21 21:19:55,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3667 conditions, 651 events. 372/651 cut-off events. For 15533/15533 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2693 event pairs, 82 based on Foata normal form. 3/652 useless extension candidates. Maximal degree in co-relation 3616. Up to 472 conditions per place. [2024-06-21 21:19:55,248 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 91 selfloop transitions, 36 changer transitions 0/129 dead transitions. [2024-06-21 21:19:55,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 129 transitions, 1362 flow [2024-06-21 21:19:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 21:19:55,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 21:19:55,249 INFO L175 Difference]: Start difference. First operand has 104 places, 92 transitions, 785 flow. Second operand 9 states and 115 transitions. [2024-06-21 21:19:55,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 129 transitions, 1362 flow [2024-06-21 21:19:55,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 129 transitions, 1224 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:55,262 INFO L231 Difference]: Finished difference. Result has 109 places, 108 transitions, 913 flow [2024-06-21 21:19:55,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=913, PETRI_PLACES=109, PETRI_TRANSITIONS=108} [2024-06-21 21:19:55,262 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2024-06-21 21:19:55,263 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 108 transitions, 913 flow [2024-06-21 21:19:55,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:55,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:55,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:55,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:19:55,263 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:55,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:55,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1792053197, now seen corresponding path program 3 times [2024-06-21 21:19:55,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:55,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809952515] [2024-06-21 21:19:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:55,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:55,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:55,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809952515] [2024-06-21 21:19:55,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809952515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:55,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:55,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:55,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547705768] [2024-06-21 21:19:55,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:55,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:55,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:55,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:55,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:55,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:55,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 108 transitions, 913 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:55,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:55,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:55,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:56,036 INFO L124 PetriNetUnfolderBase]: 366/642 cut-off events. [2024-06-21 21:19:56,036 INFO L125 PetriNetUnfolderBase]: For 15273/15273 co-relation queries the response was YES. [2024-06-21 21:19:56,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3610 conditions, 642 events. 366/642 cut-off events. For 15273/15273 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2649 event pairs, 78 based on Foata normal form. 3/643 useless extension candidates. Maximal degree in co-relation 3556. Up to 468 conditions per place. [2024-06-21 21:19:56,039 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 87 selfloop transitions, 37 changer transitions 0/126 dead transitions. [2024-06-21 21:19:56,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 126 transitions, 1281 flow [2024-06-21 21:19:56,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:56,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:56,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 21:19:56,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 21:19:56,040 INFO L175 Difference]: Start difference. First operand has 109 places, 108 transitions, 913 flow. Second operand 9 states and 111 transitions. [2024-06-21 21:19:56,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 126 transitions, 1281 flow [2024-06-21 21:19:56,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 126 transitions, 1264 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:56,058 INFO L231 Difference]: Finished difference. Result has 116 places, 110 transitions, 1006 flow [2024-06-21 21:19:56,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1006, PETRI_PLACES=116, PETRI_TRANSITIONS=110} [2024-06-21 21:19:56,059 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 86 predicate places. [2024-06-21 21:19:56,059 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 110 transitions, 1006 flow [2024-06-21 21:19:56,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:56,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:56,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:56,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:19:56,060 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:56,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:56,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1792046501, now seen corresponding path program 3 times [2024-06-21 21:19:56,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:56,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257103692] [2024-06-21 21:19:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:56,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:56,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:56,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257103692] [2024-06-21 21:19:56,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257103692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:56,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:56,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:56,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126451478] [2024-06-21 21:19:56,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:56,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:56,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:56,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:56,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:56,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:56,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 110 transitions, 1006 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:56,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:56,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:56,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:56,993 INFO L124 PetriNetUnfolderBase]: 369/647 cut-off events. [2024-06-21 21:19:56,994 INFO L125 PetriNetUnfolderBase]: For 15782/15782 co-relation queries the response was YES. [2024-06-21 21:19:56,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3797 conditions, 647 events. 369/647 cut-off events. For 15782/15782 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2672 event pairs, 65 based on Foata normal form. 1/646 useless extension candidates. Maximal degree in co-relation 3740. Up to 543 conditions per place. [2024-06-21 21:19:56,999 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 81 selfloop transitions, 38 changer transitions 0/121 dead transitions. [2024-06-21 21:19:56,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 121 transitions, 1280 flow [2024-06-21 21:19:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:56,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 21:19:57,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:19:57,000 INFO L175 Difference]: Start difference. First operand has 116 places, 110 transitions, 1006 flow. Second operand 8 states and 96 transitions. [2024-06-21 21:19:57,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 121 transitions, 1280 flow [2024-06-21 21:19:57,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 121 transitions, 1231 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:57,019 INFO L231 Difference]: Finished difference. Result has 119 places, 112 transitions, 1057 flow [2024-06-21 21:19:57,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1057, PETRI_PLACES=119, PETRI_TRANSITIONS=112} [2024-06-21 21:19:57,020 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2024-06-21 21:19:57,020 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 112 transitions, 1057 flow [2024-06-21 21:19:57,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:57,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:57,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:57,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:19:57,021 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:57,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:57,021 INFO L85 PathProgramCache]: Analyzing trace with hash -639363959, now seen corresponding path program 4 times [2024-06-21 21:19:57,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:57,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753259096] [2024-06-21 21:19:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:57,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:57,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:57,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753259096] [2024-06-21 21:19:57,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753259096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:57,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:57,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:57,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878370982] [2024-06-21 21:19:57,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:57,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:57,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:57,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:57,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:57,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:57,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 112 transitions, 1057 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:57,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:57,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:57,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:57,841 INFO L124 PetriNetUnfolderBase]: 393/686 cut-off events. [2024-06-21 21:19:57,841 INFO L125 PetriNetUnfolderBase]: For 19066/19066 co-relation queries the response was YES. [2024-06-21 21:19:57,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4075 conditions, 686 events. 393/686 cut-off events. For 19066/19066 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2882 event pairs, 86 based on Foata normal form. 3/687 useless extension candidates. Maximal degree in co-relation 4017. Up to 598 conditions per place. [2024-06-21 21:19:57,845 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 107 selfloop transitions, 22 changer transitions 0/131 dead transitions. [2024-06-21 21:19:57,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 131 transitions, 1505 flow [2024-06-21 21:19:57,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:57,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:57,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-21 21:19:57,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835125448028674 [2024-06-21 21:19:57,846 INFO L175 Difference]: Start difference. First operand has 119 places, 112 transitions, 1057 flow. Second operand 9 states and 107 transitions. [2024-06-21 21:19:57,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 131 transitions, 1505 flow [2024-06-21 21:19:57,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 131 transitions, 1427 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:57,867 INFO L231 Difference]: Finished difference. Result has 122 places, 116 transitions, 1060 flow [2024-06-21 21:19:57,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1060, PETRI_PLACES=122, PETRI_TRANSITIONS=116} [2024-06-21 21:19:57,867 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-06-21 21:19:57,867 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 116 transitions, 1060 flow [2024-06-21 21:19:57,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:57,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:57,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:57,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:19:57,868 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:57,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:57,868 INFO L85 PathProgramCache]: Analyzing trace with hash -639370655, now seen corresponding path program 4 times [2024-06-21 21:19:57,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:57,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920353233] [2024-06-21 21:19:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:57,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:58,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:58,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920353233] [2024-06-21 21:19:58,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920353233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:58,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:58,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:58,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111879658] [2024-06-21 21:19:58,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:58,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:58,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:58,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:58,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:58,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:58,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 116 transitions, 1060 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:58,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:58,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:58,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:58,780 INFO L124 PetriNetUnfolderBase]: 391/683 cut-off events. [2024-06-21 21:19:58,781 INFO L125 PetriNetUnfolderBase]: For 18916/18916 co-relation queries the response was YES. [2024-06-21 21:19:58,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4052 conditions, 683 events. 391/683 cut-off events. For 18916/18916 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2863 event pairs, 86 based on Foata normal form. 1/682 useless extension candidates. Maximal degree in co-relation 3993. Up to 658 conditions per place. [2024-06-21 21:19:58,784 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 107 selfloop transitions, 14 changer transitions 0/123 dead transitions. [2024-06-21 21:19:58,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 123 transitions, 1318 flow [2024-06-21 21:19:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:58,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:58,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 21:19:58,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:19:58,785 INFO L175 Difference]: Start difference. First operand has 122 places, 116 transitions, 1060 flow. Second operand 8 states and 88 transitions. [2024-06-21 21:19:58,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 123 transitions, 1318 flow [2024-06-21 21:19:58,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 123 transitions, 1263 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:58,808 INFO L231 Difference]: Finished difference. Result has 124 places, 116 transitions, 1038 flow [2024-06-21 21:19:58,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1038, PETRI_PLACES=124, PETRI_TRANSITIONS=116} [2024-06-21 21:19:58,809 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 94 predicate places. [2024-06-21 21:19:58,809 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 116 transitions, 1038 flow [2024-06-21 21:19:58,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:58,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:58,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:58,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:19:58,810 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:58,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:58,810 INFO L85 PathProgramCache]: Analyzing trace with hash -639370469, now seen corresponding path program 5 times [2024-06-21 21:19:58,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:58,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554071097] [2024-06-21 21:19:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:58,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:59,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:59,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554071097] [2024-06-21 21:19:59,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554071097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:59,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:59,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:59,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066810739] [2024-06-21 21:19:59,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:59,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:59,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:59,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:59,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:59,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:19:59,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 116 transitions, 1038 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:59,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:59,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:19:59,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:59,633 INFO L124 PetriNetUnfolderBase]: 385/674 cut-off events. [2024-06-21 21:19:59,634 INFO L125 PetriNetUnfolderBase]: For 19394/19394 co-relation queries the response was YES. [2024-06-21 21:19:59,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3914 conditions, 674 events. 385/674 cut-off events. For 19394/19394 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2831 event pairs, 74 based on Foata normal form. 3/675 useless extension candidates. Maximal degree in co-relation 3854. Up to 591 conditions per place. [2024-06-21 21:19:59,638 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 105 selfloop transitions, 23 changer transitions 0/130 dead transitions. [2024-06-21 21:19:59,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 130 transitions, 1394 flow [2024-06-21 21:19:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 21:19:59,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 21:19:59,639 INFO L175 Difference]: Start difference. First operand has 124 places, 116 transitions, 1038 flow. Second operand 9 states and 105 transitions. [2024-06-21 21:19:59,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 130 transitions, 1394 flow [2024-06-21 21:19:59,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 130 transitions, 1348 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 21:19:59,662 INFO L231 Difference]: Finished difference. Result has 126 places, 116 transitions, 1043 flow [2024-06-21 21:19:59,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1043, PETRI_PLACES=126, PETRI_TRANSITIONS=116} [2024-06-21 21:19:59,663 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2024-06-21 21:19:59,663 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 116 transitions, 1043 flow [2024-06-21 21:19:59,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:59,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:59,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:59,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:19:59,664 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:19:59,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:59,664 INFO L85 PathProgramCache]: Analyzing trace with hash -630792831, now seen corresponding path program 1 times [2024-06-21 21:19:59,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:59,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861469672] [2024-06-21 21:19:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:59,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:00,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:00,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861469672] [2024-06-21 21:20:00,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861469672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:00,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:00,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:00,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724919952] [2024-06-21 21:20:00,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:00,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:00,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:00,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:00,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:00,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:00,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 116 transitions, 1043 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:00,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:00,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:00,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:00,679 INFO L124 PetriNetUnfolderBase]: 381/668 cut-off events. [2024-06-21 21:20:00,680 INFO L125 PetriNetUnfolderBase]: For 19024/19024 co-relation queries the response was YES. [2024-06-21 21:20:00,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3879 conditions, 668 events. 381/668 cut-off events. For 19024/19024 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2794 event pairs, 75 based on Foata normal form. 2/668 useless extension candidates. Maximal degree in co-relation 3818. Up to 635 conditions per place. [2024-06-21 21:20:00,684 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 111 selfloop transitions, 15 changer transitions 0/128 dead transitions. [2024-06-21 21:20:00,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 128 transitions, 1339 flow [2024-06-21 21:20:00,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-21 21:20:00,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-21 21:20:00,685 INFO L175 Difference]: Start difference. First operand has 126 places, 116 transitions, 1043 flow. Second operand 9 states and 98 transitions. [2024-06-21 21:20:00,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 128 transitions, 1339 flow [2024-06-21 21:20:00,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 128 transitions, 1299 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:00,710 INFO L231 Difference]: Finished difference. Result has 128 places, 118 transitions, 1064 flow [2024-06-21 21:20:00,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1064, PETRI_PLACES=128, PETRI_TRANSITIONS=118} [2024-06-21 21:20:00,711 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-21 21:20:00,711 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 118 transitions, 1064 flow [2024-06-21 21:20:00,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:00,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:00,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:00,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:20:00,712 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:00,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:00,712 INFO L85 PathProgramCache]: Analyzing trace with hash 452927437, now seen corresponding path program 6 times [2024-06-21 21:20:00,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:00,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756706759] [2024-06-21 21:20:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:00,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:01,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:01,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756706759] [2024-06-21 21:20:01,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756706759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:01,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:01,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:20:01,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810251897] [2024-06-21 21:20:01,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:01,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:20:01,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:01,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:20:01,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:20:01,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:01,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 118 transitions, 1064 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:01,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:01,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:01,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:01,511 INFO L124 PetriNetUnfolderBase]: 375/659 cut-off events. [2024-06-21 21:20:01,511 INFO L125 PetriNetUnfolderBase]: For 18735/18735 co-relation queries the response was YES. [2024-06-21 21:20:01,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3779 conditions, 659 events. 375/659 cut-off events. For 18735/18735 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2755 event pairs, 75 based on Foata normal form. 3/660 useless extension candidates. Maximal degree in co-relation 3717. Up to 618 conditions per place. [2024-06-21 21:20:01,515 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 112 selfloop transitions, 15 changer transitions 0/129 dead transitions. [2024-06-21 21:20:01,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 129 transitions, 1346 flow [2024-06-21 21:20:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-21 21:20:01,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:20:01,520 INFO L175 Difference]: Start difference. First operand has 128 places, 118 transitions, 1064 flow. Second operand 9 states and 99 transitions. [2024-06-21 21:20:01,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 129 transitions, 1346 flow [2024-06-21 21:20:01,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 129 transitions, 1296 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:01,551 INFO L231 Difference]: Finished difference. Result has 130 places, 118 transitions, 1049 flow [2024-06-21 21:20:01,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1049, PETRI_PLACES=130, PETRI_TRANSITIONS=118} [2024-06-21 21:20:01,551 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2024-06-21 21:20:01,551 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 118 transitions, 1049 flow [2024-06-21 21:20:01,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:01,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:01,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:01,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:20:01,552 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:01,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:01,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1489415019, now seen corresponding path program 7 times [2024-06-21 21:20:01,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:01,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204248685] [2024-06-21 21:20:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:01,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:02,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:02,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204248685] [2024-06-21 21:20:02,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204248685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:02,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:02,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:20:02,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183870936] [2024-06-21 21:20:02,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:02,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:20:02,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:02,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:20:02,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:20:02,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:02,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 118 transitions, 1049 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:02,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:02,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:02,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:02,452 INFO L124 PetriNetUnfolderBase]: 384/674 cut-off events. [2024-06-21 21:20:02,452 INFO L125 PetriNetUnfolderBase]: For 20130/20130 co-relation queries the response was YES. [2024-06-21 21:20:02,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3841 conditions, 674 events. 384/674 cut-off events. For 20130/20130 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2853 event pairs, 48 based on Foata normal form. 3/675 useless extension candidates. Maximal degree in co-relation 3778. Up to 483 conditions per place. [2024-06-21 21:20:02,457 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 107 selfloop transitions, 42 changer transitions 0/151 dead transitions. [2024-06-21 21:20:02,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 151 transitions, 1599 flow [2024-06-21 21:20:02,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-21 21:20:02,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265232974910394 [2024-06-21 21:20:02,458 INFO L175 Difference]: Start difference. First operand has 130 places, 118 transitions, 1049 flow. Second operand 9 states and 119 transitions. [2024-06-21 21:20:02,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 151 transitions, 1599 flow [2024-06-21 21:20:02,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 151 transitions, 1544 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 21:20:02,483 INFO L231 Difference]: Finished difference. Result has 131 places, 128 transitions, 1205 flow [2024-06-21 21:20:02,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1205, PETRI_PLACES=131, PETRI_TRANSITIONS=128} [2024-06-21 21:20:02,484 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-06-21 21:20:02,484 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 128 transitions, 1205 flow [2024-06-21 21:20:02,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:02,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:02,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:02,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:20:02,485 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:02,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:02,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1785723383, now seen corresponding path program 8 times [2024-06-21 21:20:02,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:02,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349077784] [2024-06-21 21:20:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:02,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:02,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:02,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349077784] [2024-06-21 21:20:02,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349077784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:02,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:02,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:20:02,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585893236] [2024-06-21 21:20:02,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:02,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:20:02,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:02,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:20:02,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:20:03,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:03,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 128 transitions, 1205 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:03,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:03,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:03,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:03,346 INFO L124 PetriNetUnfolderBase]: 378/665 cut-off events. [2024-06-21 21:20:03,346 INFO L125 PetriNetUnfolderBase]: For 19479/19479 co-relation queries the response was YES. [2024-06-21 21:20:03,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3921 conditions, 665 events. 378/665 cut-off events. For 19479/19479 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2818 event pairs, 48 based on Foata normal form. 3/666 useless extension candidates. Maximal degree in co-relation 3856. Up to 479 conditions per place. [2024-06-21 21:20:03,350 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 103 selfloop transitions, 43 changer transitions 0/148 dead transitions. [2024-06-21 21:20:03,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 148 transitions, 1590 flow [2024-06-21 21:20:03,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 21:20:03,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 21:20:03,358 INFO L175 Difference]: Start difference. First operand has 131 places, 128 transitions, 1205 flow. Second operand 9 states and 115 transitions. [2024-06-21 21:20:03,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 148 transitions, 1590 flow [2024-06-21 21:20:03,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 148 transitions, 1401 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:03,385 INFO L231 Difference]: Finished difference. Result has 132 places, 128 transitions, 1116 flow [2024-06-21 21:20:03,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1116, PETRI_PLACES=132, PETRI_TRANSITIONS=128} [2024-06-21 21:20:03,386 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2024-06-21 21:20:03,387 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 128 transitions, 1116 flow [2024-06-21 21:20:03,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:03,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:03,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:03,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:20:03,387 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:03,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:03,388 INFO L85 PathProgramCache]: Analyzing trace with hash -630781919, now seen corresponding path program 1 times [2024-06-21 21:20:03,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:03,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529772571] [2024-06-21 21:20:03,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:03,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:04,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:04,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529772571] [2024-06-21 21:20:04,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529772571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:04,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:04,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:04,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714597570] [2024-06-21 21:20:04,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:04,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:04,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:04,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:04,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:04,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:04,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 128 transitions, 1116 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:04,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:04,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:04,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:04,570 INFO L124 PetriNetUnfolderBase]: 375/660 cut-off events. [2024-06-21 21:20:04,571 INFO L125 PetriNetUnfolderBase]: For 18359/18359 co-relation queries the response was YES. [2024-06-21 21:20:04,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3622 conditions, 660 events. 375/660 cut-off events. For 18359/18359 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2761 event pairs, 77 based on Foata normal form. 2/660 useless extension candidates. Maximal degree in co-relation 3559. Up to 629 conditions per place. [2024-06-21 21:20:04,574 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 122 selfloop transitions, 14 changer transitions 0/138 dead transitions. [2024-06-21 21:20:04,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 138 transitions, 1410 flow [2024-06-21 21:20:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 21:20:04,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 21:20:04,577 INFO L175 Difference]: Start difference. First operand has 132 places, 128 transitions, 1116 flow. Second operand 9 states and 96 transitions. [2024-06-21 21:20:04,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 138 transitions, 1410 flow [2024-06-21 21:20:04,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 138 transitions, 1329 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:04,602 INFO L231 Difference]: Finished difference. Result has 135 places, 128 transitions, 1067 flow [2024-06-21 21:20:04,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1067, PETRI_PLACES=135, PETRI_TRANSITIONS=128} [2024-06-21 21:20:04,603 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-21 21:20:04,603 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 128 transitions, 1067 flow [2024-06-21 21:20:04,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:04,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:04,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:04,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:20:04,603 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:04,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:04,604 INFO L85 PathProgramCache]: Analyzing trace with hash -362027941, now seen corresponding path program 1 times [2024-06-21 21:20:04,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:04,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740086387] [2024-06-21 21:20:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:04,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:05,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:05,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740086387] [2024-06-21 21:20:05,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740086387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:05,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:05,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:05,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678695940] [2024-06-21 21:20:05,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:05,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:05,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:05,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:05,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:05,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:05,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 128 transitions, 1067 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:05,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:05,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:05,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:05,598 INFO L124 PetriNetUnfolderBase]: 379/668 cut-off events. [2024-06-21 21:20:05,598 INFO L125 PetriNetUnfolderBase]: For 19101/19101 co-relation queries the response was YES. [2024-06-21 21:20:05,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3563 conditions, 668 events. 379/668 cut-off events. For 19101/19101 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2834 event pairs, 48 based on Foata normal form. 2/668 useless extension candidates. Maximal degree in co-relation 3500. Up to 454 conditions per place. [2024-06-21 21:20:05,601 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 102 selfloop transitions, 42 changer transitions 0/146 dead transitions. [2024-06-21 21:20:05,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 146 transitions, 1483 flow [2024-06-21 21:20:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:05,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 21:20:05,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-21 21:20:05,602 INFO L175 Difference]: Start difference. First operand has 135 places, 128 transitions, 1067 flow. Second operand 9 states and 109 transitions. [2024-06-21 21:20:05,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 146 transitions, 1483 flow [2024-06-21 21:20:05,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 146 transitions, 1444 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:05,631 INFO L231 Difference]: Finished difference. Result has 136 places, 129 transitions, 1124 flow [2024-06-21 21:20:05,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1124, PETRI_PLACES=136, PETRI_TRANSITIONS=129} [2024-06-21 21:20:05,632 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 106 predicate places. [2024-06-21 21:20:05,632 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 129 transitions, 1124 flow [2024-06-21 21:20:05,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:05,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:05,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:05,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:20:05,632 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:05,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:05,633 INFO L85 PathProgramCache]: Analyzing trace with hash -360150116, now seen corresponding path program 1 times [2024-06-21 21:20:05,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:05,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030330995] [2024-06-21 21:20:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:05,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:06,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:06,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030330995] [2024-06-21 21:20:06,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030330995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:06,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:06,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:06,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001293259] [2024-06-21 21:20:06,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:06,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:06,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:06,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:06,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:06,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:06,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 129 transitions, 1124 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:06,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:06,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:06,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:06,593 INFO L124 PetriNetUnfolderBase]: 388/683 cut-off events. [2024-06-21 21:20:06,593 INFO L125 PetriNetUnfolderBase]: For 19404/19404 co-relation queries the response was YES. [2024-06-21 21:20:06,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3708 conditions, 683 events. 388/683 cut-off events. For 19404/19404 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2926 event pairs, 56 based on Foata normal form. 1/682 useless extension candidates. Maximal degree in co-relation 3645. Up to 446 conditions per place. [2024-06-21 21:20:06,596 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 111 selfloop transitions, 48 changer transitions 0/161 dead transitions. [2024-06-21 21:20:06,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 161 transitions, 1689 flow [2024-06-21 21:20:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:06,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-21 21:20:06,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050179211469534 [2024-06-21 21:20:06,609 INFO L175 Difference]: Start difference. First operand has 136 places, 129 transitions, 1124 flow. Second operand 9 states and 113 transitions. [2024-06-21 21:20:06,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 161 transitions, 1689 flow [2024-06-21 21:20:06,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 161 transitions, 1601 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:06,637 INFO L231 Difference]: Finished difference. Result has 142 places, 142 transitions, 1278 flow [2024-06-21 21:20:06,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1278, PETRI_PLACES=142, PETRI_TRANSITIONS=142} [2024-06-21 21:20:06,638 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2024-06-21 21:20:06,638 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 142 transitions, 1278 flow [2024-06-21 21:20:06,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:06,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:06,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:06,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:20:06,638 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:06,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:06,639 INFO L85 PathProgramCache]: Analyzing trace with hash -360150271, now seen corresponding path program 2 times [2024-06-21 21:20:06,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:06,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657435510] [2024-06-21 21:20:06,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:06,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:07,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:07,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657435510] [2024-06-21 21:20:07,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657435510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:07,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:07,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:07,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574592100] [2024-06-21 21:20:07,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:07,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:07,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:07,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:07,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:07,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:07,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 142 transitions, 1278 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:07,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:07,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:07,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:07,569 INFO L124 PetriNetUnfolderBase]: 392/691 cut-off events. [2024-06-21 21:20:07,569 INFO L125 PetriNetUnfolderBase]: For 21288/21288 co-relation queries the response was YES. [2024-06-21 21:20:07,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3912 conditions, 691 events. 392/691 cut-off events. For 21288/21288 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2959 event pairs, 68 based on Foata normal form. 2/691 useless extension candidates. Maximal degree in co-relation 3845. Up to 536 conditions per place. [2024-06-21 21:20:07,573 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 111 selfloop transitions, 44 changer transitions 0/157 dead transitions. [2024-06-21 21:20:07,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 157 transitions, 1631 flow [2024-06-21 21:20:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 21:20:07,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-21 21:20:07,575 INFO L175 Difference]: Start difference. First operand has 142 places, 142 transitions, 1278 flow. Second operand 9 states and 109 transitions. [2024-06-21 21:20:07,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 157 transitions, 1631 flow [2024-06-21 21:20:07,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 157 transitions, 1570 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 21:20:07,606 INFO L231 Difference]: Finished difference. Result has 147 places, 143 transitions, 1316 flow [2024-06-21 21:20:07,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1316, PETRI_PLACES=147, PETRI_TRANSITIONS=143} [2024-06-21 21:20:07,607 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2024-06-21 21:20:07,607 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 143 transitions, 1316 flow [2024-06-21 21:20:07,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:07,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:07,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:07,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:20:07,607 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:07,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:07,607 INFO L85 PathProgramCache]: Analyzing trace with hash -360153991, now seen corresponding path program 3 times [2024-06-21 21:20:07,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:07,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612576138] [2024-06-21 21:20:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:07,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:08,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:08,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612576138] [2024-06-21 21:20:08,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612576138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:08,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:08,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:08,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400720536] [2024-06-21 21:20:08,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:08,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:08,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:08,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:08,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:08,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:08,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 143 transitions, 1316 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:08,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:08,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:08,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:08,607 INFO L124 PetriNetUnfolderBase]: 400/707 cut-off events. [2024-06-21 21:20:08,607 INFO L125 PetriNetUnfolderBase]: For 22364/22364 co-relation queries the response was YES. [2024-06-21 21:20:08,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3968 conditions, 707 events. 400/707 cut-off events. For 22364/22364 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3081 event pairs, 66 based on Foata normal form. 2/707 useless extension candidates. Maximal degree in co-relation 3901. Up to 538 conditions per place. [2024-06-21 21:20:08,612 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 113 selfloop transitions, 45 changer transitions 0/160 dead transitions. [2024-06-21 21:20:08,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 160 transitions, 1683 flow [2024-06-21 21:20:08,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:08,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 21:20:08,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 21:20:08,613 INFO L175 Difference]: Start difference. First operand has 147 places, 143 transitions, 1316 flow. Second operand 9 states and 111 transitions. [2024-06-21 21:20:08,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 160 transitions, 1683 flow [2024-06-21 21:20:08,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 160 transitions, 1613 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:08,643 INFO L231 Difference]: Finished difference. Result has 150 places, 145 transitions, 1359 flow [2024-06-21 21:20:08,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1359, PETRI_PLACES=150, PETRI_TRANSITIONS=145} [2024-06-21 21:20:08,644 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-06-21 21:20:08,644 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 145 transitions, 1359 flow [2024-06-21 21:20:08,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:08,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:08,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:08,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:20:08,645 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:08,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:08,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1132777752, now seen corresponding path program 2 times [2024-06-21 21:20:08,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:08,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931515369] [2024-06-21 21:20:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:08,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:09,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:09,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931515369] [2024-06-21 21:20:09,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931515369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:09,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:09,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:09,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185222215] [2024-06-21 21:20:09,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:09,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:09,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:09,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:09,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:09,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:09,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 145 transitions, 1359 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:09,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:09,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:09,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:09,673 INFO L124 PetriNetUnfolderBase]: 409/722 cut-off events. [2024-06-21 21:20:09,674 INFO L125 PetriNetUnfolderBase]: For 24400/24400 co-relation queries the response was YES. [2024-06-21 21:20:09,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4100 conditions, 722 events. 409/722 cut-off events. For 24400/24400 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3176 event pairs, 66 based on Foata normal form. 3/723 useless extension candidates. Maximal degree in co-relation 4032. Up to 437 conditions per place. [2024-06-21 21:20:09,678 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 88 selfloop transitions, 74 changer transitions 0/164 dead transitions. [2024-06-21 21:20:09,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 164 transitions, 1757 flow [2024-06-21 21:20:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 21:20:09,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 21:20:09,680 INFO L175 Difference]: Start difference. First operand has 150 places, 145 transitions, 1359 flow. Second operand 9 states and 115 transitions. [2024-06-21 21:20:09,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 164 transitions, 1757 flow [2024-06-21 21:20:09,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 164 transitions, 1669 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:09,712 INFO L231 Difference]: Finished difference. Result has 153 places, 149 transitions, 1467 flow [2024-06-21 21:20:09,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1467, PETRI_PLACES=153, PETRI_TRANSITIONS=149} [2024-06-21 21:20:09,713 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2024-06-21 21:20:09,713 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 149 transitions, 1467 flow [2024-06-21 21:20:09,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:09,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:09,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:09,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:20:09,713 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:09,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:09,713 INFO L85 PathProgramCache]: Analyzing trace with hash -273314156, now seen corresponding path program 3 times [2024-06-21 21:20:09,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:09,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802370343] [2024-06-21 21:20:09,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:09,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:10,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:10,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802370343] [2024-06-21 21:20:10,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802370343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:10,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:10,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:10,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432057151] [2024-06-21 21:20:10,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:10,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:10,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:10,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:10,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:10,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:10,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 149 transitions, 1467 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:10,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:10,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:10,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:10,762 INFO L124 PetriNetUnfolderBase]: 415/732 cut-off events. [2024-06-21 21:20:10,763 INFO L125 PetriNetUnfolderBase]: For 23921/23921 co-relation queries the response was YES. [2024-06-21 21:20:10,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4297 conditions, 732 events. 415/732 cut-off events. For 23921/23921 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3220 event pairs, 66 based on Foata normal form. 1/731 useless extension candidates. Maximal degree in co-relation 4228. Up to 439 conditions per place. [2024-06-21 21:20:10,767 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 89 selfloop transitions, 78 changer transitions 0/169 dead transitions. [2024-06-21 21:20:10,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 169 transitions, 1880 flow [2024-06-21 21:20:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:10,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:10,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 21:20:10,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:20:10,768 INFO L175 Difference]: Start difference. First operand has 153 places, 149 transitions, 1467 flow. Second operand 10 states and 124 transitions. [2024-06-21 21:20:10,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 169 transitions, 1880 flow [2024-06-21 21:20:10,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 169 transitions, 1724 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:10,801 INFO L231 Difference]: Finished difference. Result has 157 places, 153 transitions, 1525 flow [2024-06-21 21:20:10,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1525, PETRI_PLACES=157, PETRI_TRANSITIONS=153} [2024-06-21 21:20:10,801 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 127 predicate places. [2024-06-21 21:20:10,802 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 153 transitions, 1525 flow [2024-06-21 21:20:10,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:10,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:10,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:10,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:20:10,802 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:10,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:10,803 INFO L85 PathProgramCache]: Analyzing trace with hash 434446193, now seen corresponding path program 4 times [2024-06-21 21:20:10,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:10,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519241252] [2024-06-21 21:20:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:10,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:11,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:11,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519241252] [2024-06-21 21:20:11,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519241252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:11,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:11,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:11,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091705706] [2024-06-21 21:20:11,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:11,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:11,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:11,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:11,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:11,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:11,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 153 transitions, 1525 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:11,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:11,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:11,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:11,807 INFO L124 PetriNetUnfolderBase]: 419/740 cut-off events. [2024-06-21 21:20:11,807 INFO L125 PetriNetUnfolderBase]: For 26046/26046 co-relation queries the response was YES. [2024-06-21 21:20:11,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4378 conditions, 740 events. 419/740 cut-off events. For 26046/26046 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3270 event pairs, 66 based on Foata normal form. 2/740 useless extension candidates. Maximal degree in co-relation 4307. Up to 630 conditions per place. [2024-06-21 21:20:11,811 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 122 selfloop transitions, 41 changer transitions 0/165 dead transitions. [2024-06-21 21:20:11,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 165 transitions, 1886 flow [2024-06-21 21:20:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:11,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:11,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 21:20:11,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-21 21:20:11,812 INFO L175 Difference]: Start difference. First operand has 157 places, 153 transitions, 1525 flow. Second operand 9 states and 106 transitions. [2024-06-21 21:20:11,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 165 transitions, 1886 flow [2024-06-21 21:20:11,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 165 transitions, 1739 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:11,851 INFO L231 Difference]: Finished difference. Result has 159 places, 154 transitions, 1475 flow [2024-06-21 21:20:11,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1475, PETRI_PLACES=159, PETRI_TRANSITIONS=154} [2024-06-21 21:20:11,852 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 129 predicate places. [2024-06-21 21:20:11,852 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 154 transitions, 1475 flow [2024-06-21 21:20:11,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:11,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:11,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:11,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:20:11,853 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:11,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:11,853 INFO L85 PathProgramCache]: Analyzing trace with hash 434302043, now seen corresponding path program 5 times [2024-06-21 21:20:11,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:11,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786087771] [2024-06-21 21:20:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:11,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:12,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:12,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786087771] [2024-06-21 21:20:12,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786087771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:12,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:12,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:12,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67251208] [2024-06-21 21:20:12,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:12,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:12,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:12,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:12,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 154 transitions, 1475 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:12,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:12,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:12,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:13,019 INFO L124 PetriNetUnfolderBase]: 423/748 cut-off events. [2024-06-21 21:20:13,019 INFO L125 PetriNetUnfolderBase]: For 26860/26860 co-relation queries the response was YES. [2024-06-21 21:20:13,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4348 conditions, 748 events. 423/748 cut-off events. For 26860/26860 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3316 event pairs, 68 based on Foata normal form. 2/748 useless extension candidates. Maximal degree in co-relation 4276. Up to 624 conditions per place. [2024-06-21 21:20:13,023 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 119 selfloop transitions, 46 changer transitions 0/167 dead transitions. [2024-06-21 21:20:13,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 167 transitions, 1844 flow [2024-06-21 21:20:13,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 21:20:13,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:20:13,024 INFO L175 Difference]: Start difference. First operand has 159 places, 154 transitions, 1475 flow. Second operand 10 states and 115 transitions. [2024-06-21 21:20:13,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 167 transitions, 1844 flow [2024-06-21 21:20:13,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 167 transitions, 1758 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:13,072 INFO L231 Difference]: Finished difference. Result has 162 places, 155 transitions, 1500 flow [2024-06-21 21:20:13,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1500, PETRI_PLACES=162, PETRI_TRANSITIONS=155} [2024-06-21 21:20:13,072 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 132 predicate places. [2024-06-21 21:20:13,072 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 155 transitions, 1500 flow [2024-06-21 21:20:13,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:13,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:13,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:13,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:20:13,073 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:13,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:13,073 INFO L85 PathProgramCache]: Analyzing trace with hash -273458306, now seen corresponding path program 4 times [2024-06-21 21:20:13,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:13,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677120472] [2024-06-21 21:20:13,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:13,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:13,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:13,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677120472] [2024-06-21 21:20:13,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677120472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:13,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:13,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:13,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209026981] [2024-06-21 21:20:13,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:13,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:13,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:13,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:13,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:13,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:13,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 155 transitions, 1500 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:13,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:13,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:13,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:14,173 INFO L124 PetriNetUnfolderBase]: 426/753 cut-off events. [2024-06-21 21:20:14,174 INFO L125 PetriNetUnfolderBase]: For 26990/26990 co-relation queries the response was YES. [2024-06-21 21:20:14,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4416 conditions, 753 events. 426/753 cut-off events. For 26990/26990 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3364 event pairs, 68 based on Foata normal form. 1/752 useless extension candidates. Maximal degree in co-relation 4343. Up to 449 conditions per place. [2024-06-21 21:20:14,178 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 88 selfloop transitions, 84 changer transitions 0/174 dead transitions. [2024-06-21 21:20:14,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 174 transitions, 1914 flow [2024-06-21 21:20:14,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:20:14,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:20:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 21:20:14,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 21:20:14,181 INFO L175 Difference]: Start difference. First operand has 162 places, 155 transitions, 1500 flow. Second operand 11 states and 133 transitions. [2024-06-21 21:20:14,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 174 transitions, 1914 flow [2024-06-21 21:20:14,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 174 transitions, 1780 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 21:20:14,227 INFO L231 Difference]: Finished difference. Result has 163 places, 157 transitions, 1576 flow [2024-06-21 21:20:14,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1366, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1576, PETRI_PLACES=163, PETRI_TRANSITIONS=157} [2024-06-21 21:20:14,227 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-21 21:20:14,227 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 157 transitions, 1576 flow [2024-06-21 21:20:14,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:14,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:14,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:14,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:20:14,228 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:14,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:14,228 INFO L85 PathProgramCache]: Analyzing trace with hash 434298323, now seen corresponding path program 6 times [2024-06-21 21:20:14,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:14,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094754995] [2024-06-21 21:20:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:14,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:14,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:14,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094754995] [2024-06-21 21:20:14,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094754995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:14,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:14,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:14,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801348886] [2024-06-21 21:20:14,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:14,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:14,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:14,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:14,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:15,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:15,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 157 transitions, 1576 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:15,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:15,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:15,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:15,206 INFO L124 PetriNetUnfolderBase]: 430/761 cut-off events. [2024-06-21 21:20:15,207 INFO L125 PetriNetUnfolderBase]: For 28339/28339 co-relation queries the response was YES. [2024-06-21 21:20:15,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4526 conditions, 761 events. 430/761 cut-off events. For 28339/28339 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3401 event pairs, 68 based on Foata normal form. 2/761 useless extension candidates. Maximal degree in co-relation 4453. Up to 623 conditions per place. [2024-06-21 21:20:15,212 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 123 selfloop transitions, 45 changer transitions 0/170 dead transitions. [2024-06-21 21:20:15,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 170 transitions, 1951 flow [2024-06-21 21:20:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:15,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-21 21:20:15,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:20:15,213 INFO L175 Difference]: Start difference. First operand has 163 places, 157 transitions, 1576 flow. Second operand 9 states and 108 transitions. [2024-06-21 21:20:15,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 170 transitions, 1951 flow [2024-06-21 21:20:15,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 170 transitions, 1785 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 21:20:15,266 INFO L231 Difference]: Finished difference. Result has 163 places, 158 transitions, 1517 flow [2024-06-21 21:20:15,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1517, PETRI_PLACES=163, PETRI_TRANSITIONS=158} [2024-06-21 21:20:15,267 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-21 21:20:15,267 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 158 transitions, 1517 flow [2024-06-21 21:20:15,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:15,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:15,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:15,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:20:15,267 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)] === [2024-06-21 21:20:15,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:15,267 INFO L85 PathProgramCache]: Analyzing trace with hash -286642703, now seen corresponding path program 7 times [2024-06-21 21:20:15,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:15,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559213240] [2024-06-21 21:20:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:15,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:15,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:15,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559213240] [2024-06-21 21:20:15,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559213240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:15,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:15,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:15,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427189406] [2024-06-21 21:20:15,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:15,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:15,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:15,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:15,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:15,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:15,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 158 transitions, 1517 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:15,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:15,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:15,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:16,168 INFO L124 PetriNetUnfolderBase]: 434/768 cut-off events. [2024-06-21 21:20:16,168 INFO L125 PetriNetUnfolderBase]: For 28150/28152 co-relation queries the response was YES. [2024-06-21 21:20:16,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4466 conditions, 768 events. 434/768 cut-off events. For 28150/28152 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3451 event pairs, 47 based on Foata normal form. 4/770 useless extension candidates. Maximal degree in co-relation 4392. Up to 593 conditions per place. [2024-06-21 21:20:16,172 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 126 selfloop transitions, 50 changer transitions 0/178 dead transitions. [2024-06-21 21:20:16,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 178 transitions, 2029 flow [2024-06-21 21:20:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-21 21:20:16,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157706093189964 [2024-06-21 21:20:16,173 INFO L175 Difference]: Start difference. First operand has 163 places, 158 transitions, 1517 flow. Second operand 9 states and 116 transitions. [2024-06-21 21:20:16,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 178 transitions, 2029 flow [2024-06-21 21:20:16,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 178 transitions, 1933 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:16,225 INFO L231 Difference]: Finished difference. Result has 165 places, 159 transitions, 1538 flow [2024-06-21 21:20:16,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1421, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1538, PETRI_PLACES=165, PETRI_TRANSITIONS=159} [2024-06-21 21:20:16,225 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2024-06-21 21:20:16,225 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 159 transitions, 1538 flow [2024-06-21 21:20:16,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:16,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:16,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:16,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:20:16,226 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:16,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:16,226 INFO L85 PathProgramCache]: Analyzing trace with hash -286638983, now seen corresponding path program 8 times [2024-06-21 21:20:16,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:16,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934526848] [2024-06-21 21:20:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:16,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:16,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:16,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934526848] [2024-06-21 21:20:16,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934526848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:16,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:16,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:16,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866982368] [2024-06-21 21:20:16,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:16,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:16,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:16,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:16,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:16,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:16,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 159 transitions, 1538 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:16,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:16,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:16,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:17,163 INFO L124 PetriNetUnfolderBase]: 441/781 cut-off events. [2024-06-21 21:20:17,163 INFO L125 PetriNetUnfolderBase]: For 29366/29368 co-relation queries the response was YES. [2024-06-21 21:20:17,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4564 conditions, 781 events. 441/781 cut-off events. For 29366/29368 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3528 event pairs, 68 based on Foata normal form. 4/783 useless extension candidates. Maximal degree in co-relation 4490. Up to 644 conditions per place. [2024-06-21 21:20:17,168 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 127 selfloop transitions, 50 changer transitions 0/179 dead transitions. [2024-06-21 21:20:17,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 179 transitions, 1975 flow [2024-06-21 21:20:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:17,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:17,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 21:20:17,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 21:20:17,169 INFO L175 Difference]: Start difference. First operand has 165 places, 159 transitions, 1538 flow. Second operand 9 states and 114 transitions. [2024-06-21 21:20:17,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 179 transitions, 1975 flow [2024-06-21 21:20:17,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 179 transitions, 1851 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:17,238 INFO L231 Difference]: Finished difference. Result has 167 places, 162 transitions, 1552 flow [2024-06-21 21:20:17,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1552, PETRI_PLACES=167, PETRI_TRANSITIONS=162} [2024-06-21 21:20:17,238 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2024-06-21 21:20:17,238 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 162 transitions, 1552 flow [2024-06-21 21:20:17,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:17,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:17,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:17,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:20:17,239 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:17,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:17,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1732263016, now seen corresponding path program 5 times [2024-06-21 21:20:17,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:17,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240172011] [2024-06-21 21:20:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:17,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:17,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:17,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240172011] [2024-06-21 21:20:17,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240172011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:17,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:17,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:17,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456507461] [2024-06-21 21:20:17,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:17,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:17,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:17,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:17,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:17,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:17,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 162 transitions, 1552 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:17,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:17,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:17,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:18,246 INFO L124 PetriNetUnfolderBase]: 460/812 cut-off events. [2024-06-21 21:20:18,247 INFO L125 PetriNetUnfolderBase]: For 33928/33930 co-relation queries the response was YES. [2024-06-21 21:20:18,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4792 conditions, 812 events. 460/812 cut-off events. For 33928/33930 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3734 event pairs, 57 based on Foata normal form. 5/815 useless extension candidates. Maximal degree in co-relation 4717. Up to 436 conditions per place. [2024-06-21 21:20:18,252 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 102 selfloop transitions, 92 changer transitions 0/196 dead transitions. [2024-06-21 21:20:18,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 196 transitions, 2191 flow [2024-06-21 21:20:18,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:20:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:20:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2024-06-21 21:20:18,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310850439882698 [2024-06-21 21:20:18,253 INFO L175 Difference]: Start difference. First operand has 167 places, 162 transitions, 1552 flow. Second operand 11 states and 147 transitions. [2024-06-21 21:20:18,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 196 transitions, 2191 flow [2024-06-21 21:20:18,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 196 transitions, 2103 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 21:20:18,318 INFO L231 Difference]: Finished difference. Result has 173 places, 168 transitions, 1726 flow [2024-06-21 21:20:18,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1726, PETRI_PLACES=173, PETRI_TRANSITIONS=168} [2024-06-21 21:20:18,318 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2024-06-21 21:20:18,318 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 168 transitions, 1726 flow [2024-06-21 21:20:18,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:18,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:18,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:18,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:20:18,319 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:18,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:18,319 INFO L85 PathProgramCache]: Analyzing trace with hash -280924908, now seen corresponding path program 6 times [2024-06-21 21:20:18,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:18,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686688378] [2024-06-21 21:20:18,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:18,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:18,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:18,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686688378] [2024-06-21 21:20:18,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686688378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:18,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:18,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:18,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144745249] [2024-06-21 21:20:18,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:18,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:18,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:18,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:18,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:19,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:19,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 168 transitions, 1726 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:19,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:19,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:19,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:19,255 INFO L124 PetriNetUnfolderBase]: 463/818 cut-off events. [2024-06-21 21:20:19,255 INFO L125 PetriNetUnfolderBase]: For 33444/33444 co-relation queries the response was YES. [2024-06-21 21:20:19,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5024 conditions, 818 events. 463/818 cut-off events. For 33444/33444 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3760 event pairs, 85 based on Foata normal form. 1/817 useless extension candidates. Maximal degree in co-relation 4948. Up to 714 conditions per place. [2024-06-21 21:20:19,260 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 148 selfloop transitions, 36 changer transitions 0/186 dead transitions. [2024-06-21 21:20:19,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 186 transitions, 2206 flow [2024-06-21 21:20:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 21:20:19,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36451612903225805 [2024-06-21 21:20:19,261 INFO L175 Difference]: Start difference. First operand has 173 places, 168 transitions, 1726 flow. Second operand 10 states and 113 transitions. [2024-06-21 21:20:19,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 186 transitions, 2206 flow [2024-06-21 21:20:19,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 186 transitions, 2059 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:19,335 INFO L231 Difference]: Finished difference. Result has 177 places, 174 transitions, 1743 flow [2024-06-21 21:20:19,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1743, PETRI_PLACES=177, PETRI_TRANSITIONS=174} [2024-06-21 21:20:19,336 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2024-06-21 21:20:19,336 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 174 transitions, 1743 flow [2024-06-21 21:20:19,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:19,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:19,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:19,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:20:19,336 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:19,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:19,337 INFO L85 PathProgramCache]: Analyzing trace with hash -281126718, now seen corresponding path program 7 times [2024-06-21 21:20:19,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:19,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847681180] [2024-06-21 21:20:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:19,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:20,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:20,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847681180] [2024-06-21 21:20:20,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847681180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:20,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:20,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:20,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783368051] [2024-06-21 21:20:20,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:20,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:20,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:20,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:20,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:20,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:20,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 174 transitions, 1743 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:20,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:20,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:20,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:20,298 INFO L124 PetriNetUnfolderBase]: 466/823 cut-off events. [2024-06-21 21:20:20,298 INFO L125 PetriNetUnfolderBase]: For 34414/34414 co-relation queries the response was YES. [2024-06-21 21:20:20,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5099 conditions, 823 events. 466/823 cut-off events. For 34414/34414 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3787 event pairs, 83 based on Foata normal form. 1/822 useless extension candidates. Maximal degree in co-relation 5020. Up to 719 conditions per place. [2024-06-21 21:20:20,302 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 151 selfloop transitions, 36 changer transitions 0/189 dead transitions. [2024-06-21 21:20:20,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 189 transitions, 2200 flow [2024-06-21 21:20:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 21:20:20,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-21 21:20:20,303 INFO L175 Difference]: Start difference. First operand has 177 places, 174 transitions, 1743 flow. Second operand 10 states and 114 transitions. [2024-06-21 21:20:20,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 189 transitions, 2200 flow [2024-06-21 21:20:20,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 189 transitions, 2120 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:20,388 INFO L231 Difference]: Finished difference. Result has 181 places, 177 transitions, 1784 flow [2024-06-21 21:20:20,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1784, PETRI_PLACES=181, PETRI_TRANSITIONS=177} [2024-06-21 21:20:20,388 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2024-06-21 21:20:20,388 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 177 transitions, 1784 flow [2024-06-21 21:20:20,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:20,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:20,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:20,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:20:20,389 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:20,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:20,389 INFO L85 PathProgramCache]: Analyzing trace with hash -281132298, now seen corresponding path program 8 times [2024-06-21 21:20:20,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:20,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703550156] [2024-06-21 21:20:20,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:20,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:20,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:20,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703550156] [2024-06-21 21:20:20,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703550156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:20,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:20,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:21,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533063666] [2024-06-21 21:20:21,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:21,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:21,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:21,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:21,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:21,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:21,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 177 transitions, 1784 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:21,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:21,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:21,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:21,403 INFO L124 PetriNetUnfolderBase]: 490/862 cut-off events. [2024-06-21 21:20:21,404 INFO L125 PetriNetUnfolderBase]: For 42365/42365 co-relation queries the response was YES. [2024-06-21 21:20:21,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5507 conditions, 862 events. 490/862 cut-off events. For 42365/42365 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4002 event pairs, 62 based on Foata normal form. 3/863 useless extension candidates. Maximal degree in co-relation 5427. Up to 547 conditions per place. [2024-06-21 21:20:21,409 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 118 selfloop transitions, 85 changer transitions 0/205 dead transitions. [2024-06-21 21:20:21,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 205 transitions, 2458 flow [2024-06-21 21:20:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-21 21:20:21,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-21 21:20:21,410 INFO L175 Difference]: Start difference. First operand has 181 places, 177 transitions, 1784 flow. Second operand 10 states and 132 transitions. [2024-06-21 21:20:21,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 205 transitions, 2458 flow [2024-06-21 21:20:21,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 205 transitions, 2383 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:21,493 INFO L231 Difference]: Finished difference. Result has 185 places, 185 transitions, 2012 flow [2024-06-21 21:20:21,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2012, PETRI_PLACES=185, PETRI_TRANSITIONS=185} [2024-06-21 21:20:21,494 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 155 predicate places. [2024-06-21 21:20:21,494 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 185 transitions, 2012 flow [2024-06-21 21:20:21,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:21,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:21,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:21,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:20:21,495 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:21,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:21,495 INFO L85 PathProgramCache]: Analyzing trace with hash -281132453, now seen corresponding path program 9 times [2024-06-21 21:20:21,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:21,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536820196] [2024-06-21 21:20:21,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:21,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:22,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:22,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536820196] [2024-06-21 21:20:22,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536820196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:22,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:22,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:22,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479301819] [2024-06-21 21:20:22,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:22,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:22,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:22,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:22,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:22,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:22,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 185 transitions, 2012 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:22,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:22,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:22,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:22,446 INFO L124 PetriNetUnfolderBase]: 494/870 cut-off events. [2024-06-21 21:20:22,447 INFO L125 PetriNetUnfolderBase]: For 43121/43121 co-relation queries the response was YES. [2024-06-21 21:20:22,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5724 conditions, 870 events. 494/870 cut-off events. For 43121/43121 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4055 event pairs, 76 based on Foata normal form. 2/870 useless extension candidates. Maximal degree in co-relation 5643. Up to 760 conditions per place. [2024-06-21 21:20:22,453 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 156 selfloop transitions, 39 changer transitions 0/197 dead transitions. [2024-06-21 21:20:22,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 197 transitions, 2443 flow [2024-06-21 21:20:22,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 21:20:22,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 21:20:22,454 INFO L175 Difference]: Start difference. First operand has 185 places, 185 transitions, 2012 flow. Second operand 9 states and 105 transitions. [2024-06-21 21:20:22,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 197 transitions, 2443 flow [2024-06-21 21:20:22,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 197 transitions, 2321 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:22,540 INFO L231 Difference]: Finished difference. Result has 188 places, 186 transitions, 1989 flow [2024-06-21 21:20:22,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1890, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1989, PETRI_PLACES=188, PETRI_TRANSITIONS=186} [2024-06-21 21:20:22,540 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2024-06-21 21:20:22,540 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 186 transitions, 1989 flow [2024-06-21 21:20:22,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:22,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:22,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:22,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:20:22,541 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:22,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:22,541 INFO L85 PathProgramCache]: Analyzing trace with hash -286494833, now seen corresponding path program 10 times [2024-06-21 21:20:22,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:22,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983273179] [2024-06-21 21:20:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:22,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:23,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:23,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983273179] [2024-06-21 21:20:23,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983273179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:23,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:23,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:23,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530514520] [2024-06-21 21:20:23,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:23,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:23,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:23,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:23,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:23,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:23,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 186 transitions, 1989 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:23,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:23,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:23,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:23,485 INFO L124 PetriNetUnfolderBase]: 498/877 cut-off events. [2024-06-21 21:20:23,486 INFO L125 PetriNetUnfolderBase]: For 44292/44294 co-relation queries the response was YES. [2024-06-21 21:20:23,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5809 conditions, 877 events. 498/877 cut-off events. For 44292/44294 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4110 event pairs, 74 based on Foata normal form. 4/879 useless extension candidates. Maximal degree in co-relation 5726. Up to 768 conditions per place. [2024-06-21 21:20:23,491 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 156 selfloop transitions, 43 changer transitions 0/201 dead transitions. [2024-06-21 21:20:23,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 201 transitions, 2442 flow [2024-06-21 21:20:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 21:20:23,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-21 21:20:23,492 INFO L175 Difference]: Start difference. First operand has 188 places, 186 transitions, 1989 flow. Second operand 9 states and 109 transitions. [2024-06-21 21:20:23,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 201 transitions, 2442 flow [2024-06-21 21:20:23,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 201 transitions, 2354 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:23,594 INFO L231 Difference]: Finished difference. Result has 190 places, 187 transitions, 2010 flow [2024-06-21 21:20:23,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1901, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2010, PETRI_PLACES=190, PETRI_TRANSITIONS=187} [2024-06-21 21:20:23,595 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 160 predicate places. [2024-06-21 21:20:23,595 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 187 transitions, 2010 flow [2024-06-21 21:20:23,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:23,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:23,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:23,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:20:23,595 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:23,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:23,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1031500363, now seen corresponding path program 1 times [2024-06-21 21:20:23,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:23,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593369896] [2024-06-21 21:20:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:23,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:24,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:24,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593369896] [2024-06-21 21:20:24,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593369896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:24,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:24,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:24,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265997806] [2024-06-21 21:20:24,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:24,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:24,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:24,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:24,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 187 transitions, 2010 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:24,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:24,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:24,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:24,519 INFO L124 PetriNetUnfolderBase]: 494/872 cut-off events. [2024-06-21 21:20:24,519 INFO L125 PetriNetUnfolderBase]: For 42942/42942 co-relation queries the response was YES. [2024-06-21 21:20:24,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5710 conditions, 872 events. 494/872 cut-off events. For 42942/42942 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4069 event pairs, 90 based on Foata normal form. 2/872 useless extension candidates. Maximal degree in co-relation 5626. Up to 831 conditions per place. [2024-06-21 21:20:24,525 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 182 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2024-06-21 21:20:24,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 200 transitions, 2446 flow [2024-06-21 21:20:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-21 21:20:24,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-21 21:20:24,526 INFO L175 Difference]: Start difference. First operand has 190 places, 187 transitions, 2010 flow. Second operand 9 states and 100 transitions. [2024-06-21 21:20:24,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 200 transitions, 2446 flow [2024-06-21 21:20:24,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 200 transitions, 2328 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:24,614 INFO L231 Difference]: Finished difference. Result has 191 places, 189 transitions, 1949 flow [2024-06-21 21:20:24,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1949, PETRI_PLACES=191, PETRI_TRANSITIONS=189} [2024-06-21 21:20:24,614 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2024-06-21 21:20:24,614 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 189 transitions, 1949 flow [2024-06-21 21:20:24,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:24,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:24,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:24,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:20:24,614 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:24,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:24,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1661704424, now seen corresponding path program 9 times [2024-06-21 21:20:24,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:24,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527148802] [2024-06-21 21:20:24,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:24,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:25,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:25,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527148802] [2024-06-21 21:20:25,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527148802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:25,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:25,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:25,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820263592] [2024-06-21 21:20:25,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:25,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:25,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:25,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:25,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:25,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:25,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 189 transitions, 1949 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:25,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:25,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:25,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:25,556 INFO L124 PetriNetUnfolderBase]: 497/877 cut-off events. [2024-06-21 21:20:25,556 INFO L125 PetriNetUnfolderBase]: For 42692/42692 co-relation queries the response was YES. [2024-06-21 21:20:25,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5686 conditions, 877 events. 497/877 cut-off events. For 42692/42692 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4125 event pairs, 90 based on Foata normal form. 1/876 useless extension candidates. Maximal degree in co-relation 5601. Up to 849 conditions per place. [2024-06-21 21:20:25,562 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 183 selfloop transitions, 17 changer transitions 0/202 dead transitions. [2024-06-21 21:20:25,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 202 transitions, 2426 flow [2024-06-21 21:20:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-21 21:20:25,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33548387096774196 [2024-06-21 21:20:25,563 INFO L175 Difference]: Start difference. First operand has 191 places, 189 transitions, 1949 flow. Second operand 10 states and 104 transitions. [2024-06-21 21:20:25,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 202 transitions, 2426 flow [2024-06-21 21:20:25,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 202 transitions, 2385 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:25,657 INFO L231 Difference]: Finished difference. Result has 195 places, 194 transitions, 2017 flow [2024-06-21 21:20:25,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2017, PETRI_PLACES=195, PETRI_TRANSITIONS=194} [2024-06-21 21:20:25,658 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2024-06-21 21:20:25,658 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 194 transitions, 2017 flow [2024-06-21 21:20:25,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:25,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:25,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:25,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:20:25,658 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:25,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:25,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1654554584, now seen corresponding path program 10 times [2024-06-21 21:20:25,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:25,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750895330] [2024-06-21 21:20:25,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:25,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:26,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:26,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750895330] [2024-06-21 21:20:26,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750895330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:26,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:26,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:26,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635296074] [2024-06-21 21:20:26,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:26,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:26,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:26,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:26,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:26,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:26,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 194 transitions, 2017 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:26,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:26,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:26,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:26,604 INFO L124 PetriNetUnfolderBase]: 500/882 cut-off events. [2024-06-21 21:20:26,604 INFO L125 PetriNetUnfolderBase]: For 44263/44263 co-relation queries the response was YES. [2024-06-21 21:20:26,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5771 conditions, 882 events. 500/882 cut-off events. For 44263/44263 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4147 event pairs, 88 based on Foata normal form. 1/881 useless extension candidates. Maximal degree in co-relation 5684. Up to 839 conditions per place. [2024-06-21 21:20:26,609 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 181 selfloop transitions, 23 changer transitions 0/206 dead transitions. [2024-06-21 21:20:26,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 206 transitions, 2501 flow [2024-06-21 21:20:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-21 21:20:26,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-21 21:20:26,610 INFO L175 Difference]: Start difference. First operand has 195 places, 194 transitions, 2017 flow. Second operand 10 states and 108 transitions. [2024-06-21 21:20:26,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 206 transitions, 2501 flow [2024-06-21 21:20:26,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 206 transitions, 2460 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 21:20:26,733 INFO L231 Difference]: Finished difference. Result has 201 places, 198 transitions, 2096 flow [2024-06-21 21:20:26,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1976, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2096, PETRI_PLACES=201, PETRI_TRANSITIONS=198} [2024-06-21 21:20:26,734 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2024-06-21 21:20:26,734 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 198 transitions, 2096 flow [2024-06-21 21:20:26,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:26,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:26,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:26,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:20:26,734 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:26,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:26,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1654352774, now seen corresponding path program 11 times [2024-06-21 21:20:26,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:26,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929589619] [2024-06-21 21:20:26,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:26,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:27,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:27,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929589619] [2024-06-21 21:20:27,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929589619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:27,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:27,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:27,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902142978] [2024-06-21 21:20:27,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:27,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:27,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:27,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:27,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:27,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:27,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 198 transitions, 2096 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:27,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:27,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:27,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:27,679 INFO L124 PetriNetUnfolderBase]: 503/887 cut-off events. [2024-06-21 21:20:27,679 INFO L125 PetriNetUnfolderBase]: For 45991/45991 co-relation queries the response was YES. [2024-06-21 21:20:27,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5887 conditions, 887 events. 503/887 cut-off events. For 45991/45991 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4170 event pairs, 90 based on Foata normal form. 1/886 useless extension candidates. Maximal degree in co-relation 5797. Up to 844 conditions per place. [2024-06-21 21:20:27,684 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 182 selfloop transitions, 25 changer transitions 0/209 dead transitions. [2024-06-21 21:20:27,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 209 transitions, 2586 flow [2024-06-21 21:20:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:27,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:27,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-21 21:20:27,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-21 21:20:27,686 INFO L175 Difference]: Start difference. First operand has 201 places, 198 transitions, 2096 flow. Second operand 10 states and 107 transitions. [2024-06-21 21:20:27,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 209 transitions, 2586 flow [2024-06-21 21:20:27,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 209 transitions, 2486 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:27,795 INFO L231 Difference]: Finished difference. Result has 203 places, 201 transitions, 2113 flow [2024-06-21 21:20:27,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2000, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2113, PETRI_PLACES=203, PETRI_TRANSITIONS=201} [2024-06-21 21:20:27,795 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 173 predicate places. [2024-06-21 21:20:27,795 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 201 transitions, 2113 flow [2024-06-21 21:20:27,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:27,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:27,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:27,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:20:27,796 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:27,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:27,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1654347194, now seen corresponding path program 12 times [2024-06-21 21:20:27,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:27,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116608497] [2024-06-21 21:20:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:27,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:28,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:28,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116608497] [2024-06-21 21:20:28,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116608497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:28,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:28,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:28,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121364385] [2024-06-21 21:20:28,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:28,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:28,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:28,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:28,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:28,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:28,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 201 transitions, 2113 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:28,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:28,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:28,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:28,780 INFO L124 PetriNetUnfolderBase]: 507/894 cut-off events. [2024-06-21 21:20:28,780 INFO L125 PetriNetUnfolderBase]: For 49065/49065 co-relation queries the response was YES. [2024-06-21 21:20:28,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5836 conditions, 894 events. 507/894 cut-off events. For 49065/49065 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4220 event pairs, 83 based on Foata normal form. 3/895 useless extension candidates. Maximal degree in co-relation 5746. Up to 778 conditions per place. [2024-06-21 21:20:28,786 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 175 selfloop transitions, 41 changer transitions 0/218 dead transitions. [2024-06-21 21:20:28,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 218 transitions, 2719 flow [2024-06-21 21:20:28,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:28,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 21:20:28,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 21:20:28,787 INFO L175 Difference]: Start difference. First operand has 203 places, 201 transitions, 2113 flow. Second operand 10 states and 121 transitions. [2024-06-21 21:20:28,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 218 transitions, 2719 flow [2024-06-21 21:20:28,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 218 transitions, 2648 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:28,883 INFO L231 Difference]: Finished difference. Result has 207 places, 203 transitions, 2161 flow [2024-06-21 21:20:28,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2161, PETRI_PLACES=207, PETRI_TRANSITIONS=203} [2024-06-21 21:20:28,884 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2024-06-21 21:20:28,884 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 203 transitions, 2161 flow [2024-06-21 21:20:28,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:28,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:28,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:28,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:20:28,885 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:28,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:28,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1654347039, now seen corresponding path program 11 times [2024-06-21 21:20:28,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:28,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124631456] [2024-06-21 21:20:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:28,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:29,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:29,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124631456] [2024-06-21 21:20:29,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124631456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:29,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:29,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:29,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813828433] [2024-06-21 21:20:29,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:29,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:29,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:29,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:29,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:29,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:29,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 203 transitions, 2161 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:29,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:29,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:29,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:29,865 INFO L124 PetriNetUnfolderBase]: 504/889 cut-off events. [2024-06-21 21:20:29,865 INFO L125 PetriNetUnfolderBase]: For 45571/45571 co-relation queries the response was YES. [2024-06-21 21:20:29,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5756 conditions, 889 events. 504/889 cut-off events. For 45571/45571 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4193 event pairs, 87 based on Foata normal form. 2/889 useless extension candidates. Maximal degree in co-relation 5665. Up to 858 conditions per place. [2024-06-21 21:20:29,871 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 195 selfloop transitions, 15 changer transitions 0/212 dead transitions. [2024-06-21 21:20:29,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 212 transitions, 2601 flow [2024-06-21 21:20:29,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:29,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-21 21:20:29,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-21 21:20:29,872 INFO L175 Difference]: Start difference. First operand has 207 places, 203 transitions, 2161 flow. Second operand 9 states and 97 transitions. [2024-06-21 21:20:29,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 212 transitions, 2601 flow [2024-06-21 21:20:29,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 212 transitions, 2373 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-21 21:20:29,973 INFO L231 Difference]: Finished difference. Result has 207 places, 203 transitions, 1967 flow [2024-06-21 21:20:29,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1967, PETRI_PLACES=207, PETRI_TRANSITIONS=203} [2024-06-21 21:20:29,973 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2024-06-21 21:20:29,973 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 203 transitions, 1967 flow [2024-06-21 21:20:29,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:29,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:29,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:29,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:20:29,974 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:29,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:29,974 INFO L85 PathProgramCache]: Analyzing trace with hash 477150808, now seen corresponding path program 13 times [2024-06-21 21:20:29,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:29,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962030659] [2024-06-21 21:20:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:29,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:30,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:30,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962030659] [2024-06-21 21:20:30,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962030659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:30,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:30,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:30,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474646459] [2024-06-21 21:20:30,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:30,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:30,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:30,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:30,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:30,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:30,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 203 transitions, 1967 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:30,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:30,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:30,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:31,165 INFO L124 PetriNetUnfolderBase]: 508/896 cut-off events. [2024-06-21 21:20:31,165 INFO L125 PetriNetUnfolderBase]: For 45005/45005 co-relation queries the response was YES. [2024-06-21 21:20:31,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5399 conditions, 896 events. 508/896 cut-off events. For 45005/45005 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4237 event pairs, 64 based on Foata normal form. 3/897 useless extension candidates. Maximal degree in co-relation 5308. Up to 699 conditions per place. [2024-06-21 21:20:31,171 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 162 selfloop transitions, 58 changer transitions 0/222 dead transitions. [2024-06-21 21:20:31,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 222 transitions, 2479 flow [2024-06-21 21:20:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-21 21:20:31,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-21 21:20:31,172 INFO L175 Difference]: Start difference. First operand has 207 places, 203 transitions, 1967 flow. Second operand 10 states and 126 transitions. [2024-06-21 21:20:31,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 222 transitions, 2479 flow [2024-06-21 21:20:31,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 222 transitions, 2393 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 21:20:31,275 INFO L231 Difference]: Finished difference. Result has 208 places, 205 transitions, 2031 flow [2024-06-21 21:20:31,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2031, PETRI_PLACES=208, PETRI_TRANSITIONS=205} [2024-06-21 21:20:31,276 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-06-21 21:20:31,276 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 205 transitions, 2031 flow [2024-06-21 21:20:31,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:31,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:31,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:31,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:20:31,276 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:31,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:31,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2127775880, now seen corresponding path program 1 times [2024-06-21 21:20:31,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:31,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46832347] [2024-06-21 21:20:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:31,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:31,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:31,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46832347] [2024-06-21 21:20:31,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46832347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:31,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:31,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:31,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599173898] [2024-06-21 21:20:31,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:31,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:31,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:31,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:31,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:32,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:32,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 205 transitions, 2031 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:32,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:32,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:32,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:32,300 INFO L124 PetriNetUnfolderBase]: 555/989 cut-off events. [2024-06-21 21:20:32,300 INFO L125 PetriNetUnfolderBase]: For 70005/70005 co-relation queries the response was YES. [2024-06-21 21:20:32,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6654 conditions, 989 events. 555/989 cut-off events. For 70005/70005 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4775 event pairs, 73 based on Foata normal form. 2/989 useless extension candidates. Maximal degree in co-relation 6562. Up to 340 conditions per place. [2024-06-21 21:20:32,306 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 121 selfloop transitions, 111 changer transitions 0/234 dead transitions. [2024-06-21 21:20:32,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 234 transitions, 2849 flow [2024-06-21 21:20:32,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:32,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-21 21:20:32,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-21 21:20:32,307 INFO L175 Difference]: Start difference. First operand has 208 places, 205 transitions, 2031 flow. Second operand 10 states and 132 transitions. [2024-06-21 21:20:32,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 234 transitions, 2849 flow [2024-06-21 21:20:32,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 234 transitions, 2677 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 21:20:32,457 INFO L231 Difference]: Finished difference. Result has 209 places, 206 transitions, 2091 flow [2024-06-21 21:20:32,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1859, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2091, PETRI_PLACES=209, PETRI_TRANSITIONS=206} [2024-06-21 21:20:32,458 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-21 21:20:32,458 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 206 transitions, 2091 flow [2024-06-21 21:20:32,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:32,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:32,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:32,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:20:32,458 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:32,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:32,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2108978996, now seen corresponding path program 2 times [2024-06-21 21:20:32,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:32,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729118014] [2024-06-21 21:20:32,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:32,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:33,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:33,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729118014] [2024-06-21 21:20:33,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729118014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:33,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:33,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:33,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255361424] [2024-06-21 21:20:33,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:33,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:33,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:33,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:33,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:33,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:33,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 206 transitions, 2091 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:33,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:33,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:33,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:33,528 INFO L124 PetriNetUnfolderBase]: 559/997 cut-off events. [2024-06-21 21:20:33,528 INFO L125 PetriNetUnfolderBase]: For 72417/72417 co-relation queries the response was YES. [2024-06-21 21:20:33,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6768 conditions, 997 events. 559/997 cut-off events. For 72417/72417 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4851 event pairs, 101 based on Foata normal form. 2/997 useless extension candidates. Maximal degree in co-relation 6676. Up to 738 conditions per place. [2024-06-21 21:20:33,535 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 141 selfloop transitions, 80 changer transitions 0/223 dead transitions. [2024-06-21 21:20:33,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 223 transitions, 2590 flow [2024-06-21 21:20:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 21:20:33,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 21:20:33,536 INFO L175 Difference]: Start difference. First operand has 209 places, 206 transitions, 2091 flow. Second operand 10 states and 121 transitions. [2024-06-21 21:20:33,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 223 transitions, 2590 flow [2024-06-21 21:20:33,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 223 transitions, 2412 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:33,666 INFO L231 Difference]: Finished difference. Result has 212 places, 207 transitions, 2087 flow [2024-06-21 21:20:33,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1916, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2087, PETRI_PLACES=212, PETRI_TRANSITIONS=207} [2024-06-21 21:20:33,667 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2024-06-21 21:20:33,667 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 207 transitions, 2087 flow [2024-06-21 21:20:33,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:33,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:33,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:33,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:20:33,667 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:33,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:33,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2024074372, now seen corresponding path program 3 times [2024-06-21 21:20:33,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:33,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636821571] [2024-06-21 21:20:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:33,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:34,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:34,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636821571] [2024-06-21 21:20:34,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636821571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:34,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:34,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:34,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343620216] [2024-06-21 21:20:34,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:34,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:34,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:34,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:34,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:34,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:34,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 207 transitions, 2087 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:34,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:34,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:34,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:34,819 INFO L124 PetriNetUnfolderBase]: 613/1103 cut-off events. [2024-06-21 21:20:34,820 INFO L125 PetriNetUnfolderBase]: For 101744/101744 co-relation queries the response was YES. [2024-06-21 21:20:34,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8122 conditions, 1103 events. 613/1103 cut-off events. For 101744/101744 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5507 event pairs, 97 based on Foata normal form. 2/1103 useless extension candidates. Maximal degree in co-relation 8029. Up to 474 conditions per place. [2024-06-21 21:20:34,829 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 113 selfloop transitions, 126 changer transitions 0/241 dead transitions. [2024-06-21 21:20:34,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 241 transitions, 2955 flow [2024-06-21 21:20:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:20:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:20:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 153 transitions. [2024-06-21 21:20:34,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44868035190615835 [2024-06-21 21:20:34,830 INFO L175 Difference]: Start difference. First operand has 212 places, 207 transitions, 2087 flow. Second operand 11 states and 153 transitions. [2024-06-21 21:20:34,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 241 transitions, 2955 flow [2024-06-21 21:20:34,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 241 transitions, 2791 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:34,987 INFO L231 Difference]: Finished difference. Result has 216 places, 210 transitions, 2238 flow [2024-06-21 21:20:34,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2238, PETRI_PLACES=216, PETRI_TRANSITIONS=210} [2024-06-21 21:20:34,987 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2024-06-21 21:20:34,987 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 210 transitions, 2238 flow [2024-06-21 21:20:34,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:34,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:34,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:34,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:20:34,987 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:34,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:34,988 INFO L85 PathProgramCache]: Analyzing trace with hash -2108983646, now seen corresponding path program 4 times [2024-06-21 21:20:34,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:34,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594109367] [2024-06-21 21:20:34,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:34,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:35,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:35,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594109367] [2024-06-21 21:20:35,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594109367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:35,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:35,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:35,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91001794] [2024-06-21 21:20:35,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:35,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:35,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:35,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:35,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:35,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:35,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 210 transitions, 2238 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:35,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:35,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:35,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:36,081 INFO L124 PetriNetUnfolderBase]: 617/1111 cut-off events. [2024-06-21 21:20:36,081 INFO L125 PetriNetUnfolderBase]: For 105734/105734 co-relation queries the response was YES. [2024-06-21 21:20:36,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8400 conditions, 1111 events. 617/1111 cut-off events. For 105734/105734 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5598 event pairs, 125 based on Foata normal form. 2/1111 useless extension candidates. Maximal degree in co-relation 8305. Up to 838 conditions per place. [2024-06-21 21:20:36,088 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 145 selfloop transitions, 81 changer transitions 0/228 dead transitions. [2024-06-21 21:20:36,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 228 transitions, 2753 flow [2024-06-21 21:20:36,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:36,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:36,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 21:20:36,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 21:20:36,089 INFO L175 Difference]: Start difference. First operand has 216 places, 210 transitions, 2238 flow. Second operand 10 states and 123 transitions. [2024-06-21 21:20:36,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 228 transitions, 2753 flow [2024-06-21 21:20:36,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 228 transitions, 2569 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:36,281 INFO L231 Difference]: Finished difference. Result has 219 places, 211 transitions, 2234 flow [2024-06-21 21:20:36,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2234, PETRI_PLACES=219, PETRI_TRANSITIONS=211} [2024-06-21 21:20:36,281 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 189 predicate places. [2024-06-21 21:20:36,282 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 211 transitions, 2234 flow [2024-06-21 21:20:36,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:36,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:36,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:36,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:20:36,282 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:36,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:36,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2024194528, now seen corresponding path program 1 times [2024-06-21 21:20:36,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:36,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279204605] [2024-06-21 21:20:36,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:36,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:37,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:37,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279204605] [2024-06-21 21:20:37,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279204605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:37,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:37,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:37,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068124613] [2024-06-21 21:20:37,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:37,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:37,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:37,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:37,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:37,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:37,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 211 transitions, 2234 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:37,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:37,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:37,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:37,454 INFO L124 PetriNetUnfolderBase]: 623/1121 cut-off events. [2024-06-21 21:20:37,455 INFO L125 PetriNetUnfolderBase]: For 108580/108580 co-relation queries the response was YES. [2024-06-21 21:20:37,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8541 conditions, 1121 events. 623/1121 cut-off events. For 108580/108580 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5624 event pairs, 112 based on Foata normal form. 2/1121 useless extension candidates. Maximal degree in co-relation 8444. Up to 611 conditions per place. [2024-06-21 21:20:37,463 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 127 selfloop transitions, 105 changer transitions 0/234 dead transitions. [2024-06-21 21:20:37,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 234 transitions, 2924 flow [2024-06-21 21:20:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:37,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-21 21:20:37,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-21 21:20:37,464 INFO L175 Difference]: Start difference. First operand has 219 places, 211 transitions, 2234 flow. Second operand 10 states and 129 transitions. [2024-06-21 21:20:37,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 234 transitions, 2924 flow [2024-06-21 21:20:37,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 234 transitions, 2760 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:37,653 INFO L231 Difference]: Finished difference. Result has 221 places, 215 transitions, 2341 flow [2024-06-21 21:20:37,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2070, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2341, PETRI_PLACES=221, PETRI_TRANSITIONS=215} [2024-06-21 21:20:37,653 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2024-06-21 21:20:37,653 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 215 transitions, 2341 flow [2024-06-21 21:20:37,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:37,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:37,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:37,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:20:37,654 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:37,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:37,654 INFO L85 PathProgramCache]: Analyzing trace with hash 117369786, now seen corresponding path program 2 times [2024-06-21 21:20:37,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:37,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566309686] [2024-06-21 21:20:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:37,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:38,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:38,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566309686] [2024-06-21 21:20:38,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566309686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:38,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:38,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:38,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729726702] [2024-06-21 21:20:38,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:38,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:38,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:38,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:38,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:38,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:38,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 215 transitions, 2341 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:38,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:38,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:38,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:38,877 INFO L124 PetriNetUnfolderBase]: 629/1131 cut-off events. [2024-06-21 21:20:38,877 INFO L125 PetriNetUnfolderBase]: For 112346/112346 co-relation queries the response was YES. [2024-06-21 21:20:38,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8775 conditions, 1131 events. 629/1131 cut-off events. For 112346/112346 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5721 event pairs, 94 based on Foata normal form. 2/1131 useless extension candidates. Maximal degree in co-relation 8677. Up to 818 conditions per place. [2024-06-21 21:20:38,886 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 152 selfloop transitions, 82 changer transitions 0/236 dead transitions. [2024-06-21 21:20:38,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 236 transitions, 2893 flow [2024-06-21 21:20:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:20:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:20:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 21:20:38,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 21:20:38,887 INFO L175 Difference]: Start difference. First operand has 221 places, 215 transitions, 2341 flow. Second operand 11 states and 135 transitions. [2024-06-21 21:20:38,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 236 transitions, 2893 flow [2024-06-21 21:20:39,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 236 transitions, 2787 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:39,071 INFO L231 Difference]: Finished difference. Result has 226 places, 217 transitions, 2438 flow [2024-06-21 21:20:39,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2438, PETRI_PLACES=226, PETRI_TRANSITIONS=217} [2024-06-21 21:20:39,071 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 196 predicate places. [2024-06-21 21:20:39,072 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 217 transitions, 2438 flow [2024-06-21 21:20:39,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:39,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:39,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:39,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:20:39,072 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:39,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:39,072 INFO L85 PathProgramCache]: Analyzing trace with hash -536490518, now seen corresponding path program 5 times [2024-06-21 21:20:39,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:39,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132272407] [2024-06-21 21:20:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:39,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:39,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:39,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132272407] [2024-06-21 21:20:39,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132272407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:39,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:39,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:39,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849247011] [2024-06-21 21:20:39,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:39,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:39,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:39,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:39,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:39,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:39,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 217 transitions, 2438 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:39,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:39,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:39,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:40,326 INFO L124 PetriNetUnfolderBase]: 614/1106 cut-off events. [2024-06-21 21:20:40,327 INFO L125 PetriNetUnfolderBase]: For 116129/116129 co-relation queries the response was YES. [2024-06-21 21:20:40,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7983 conditions, 1106 events. 614/1106 cut-off events. For 116129/116129 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5600 event pairs, 95 based on Foata normal form. 16/1120 useless extension candidates. Maximal degree in co-relation 7883. Up to 753 conditions per place. [2024-06-21 21:20:40,333 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 156 selfloop transitions, 73 changer transitions 9/240 dead transitions. [2024-06-21 21:20:40,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 240 transitions, 3012 flow [2024-06-21 21:20:40,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-21 21:20:40,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 21:20:40,334 INFO L175 Difference]: Start difference. First operand has 226 places, 217 transitions, 2438 flow. Second operand 10 states and 130 transitions. [2024-06-21 21:20:40,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 240 transitions, 3012 flow [2024-06-21 21:20:40,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 240 transitions, 2831 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 21:20:40,575 INFO L231 Difference]: Finished difference. Result has 227 places, 214 transitions, 2362 flow [2024-06-21 21:20:40,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2257, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2362, PETRI_PLACES=227, PETRI_TRANSITIONS=214} [2024-06-21 21:20:40,575 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 197 predicate places. [2024-06-21 21:20:40,575 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 214 transitions, 2362 flow [2024-06-21 21:20:40,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:40,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:40,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:40,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:20:40,575 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:40,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:40,576 INFO L85 PathProgramCache]: Analyzing trace with hash 582935764, now seen corresponding path program 6 times [2024-06-21 21:20:40,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:40,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153537740] [2024-06-21 21:20:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:40,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:41,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:41,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153537740] [2024-06-21 21:20:41,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153537740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:41,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:41,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:41,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331787842] [2024-06-21 21:20:41,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:41,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:41,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:41,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:41,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:41,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:41,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 214 transitions, 2362 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:41,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:41,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:41,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:41,762 INFO L124 PetriNetUnfolderBase]: 596/1080 cut-off events. [2024-06-21 21:20:41,762 INFO L125 PetriNetUnfolderBase]: For 89163/89163 co-relation queries the response was YES. [2024-06-21 21:20:41,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7826 conditions, 1080 events. 596/1080 cut-off events. For 89163/89163 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5467 event pairs, 105 based on Foata normal form. 2/1080 useless extension candidates. Maximal degree in co-relation 7725. Up to 909 conditions per place. [2024-06-21 21:20:41,770 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 167 selfloop transitions, 61 changer transitions 0/230 dead transitions. [2024-06-21 21:20:41,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 230 transitions, 2887 flow [2024-06-21 21:20:41,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:41,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:41,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 21:20:41,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 21:20:41,771 INFO L175 Difference]: Start difference. First operand has 227 places, 214 transitions, 2362 flow. Second operand 10 states and 119 transitions. [2024-06-21 21:20:41,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 230 transitions, 2887 flow [2024-06-21 21:20:41,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 230 transitions, 2728 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:41,953 INFO L231 Difference]: Finished difference. Result has 230 places, 218 transitions, 2386 flow [2024-06-21 21:20:41,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2386, PETRI_PLACES=230, PETRI_TRANSITIONS=218} [2024-06-21 21:20:41,954 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 200 predicate places. [2024-06-21 21:20:41,954 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 218 transitions, 2386 flow [2024-06-21 21:20:41,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:41,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:41,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:41,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:20:41,954 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:41,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:41,954 INFO L85 PathProgramCache]: Analyzing trace with hash 117196806, now seen corresponding path program 3 times [2024-06-21 21:20:41,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:41,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644887613] [2024-06-21 21:20:41,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:41,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:42,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:42,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644887613] [2024-06-21 21:20:42,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644887613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:42,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:42,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:42,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828616779] [2024-06-21 21:20:42,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:42,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:42,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:42,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:42,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:42,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:42,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 218 transitions, 2386 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:42,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:42,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:42,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:43,232 INFO L124 PetriNetUnfolderBase]: 602/1090 cut-off events. [2024-06-21 21:20:43,233 INFO L125 PetriNetUnfolderBase]: For 91985/91985 co-relation queries the response was YES. [2024-06-21 21:20:43,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7896 conditions, 1090 events. 602/1090 cut-off events. For 91985/91985 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5537 event pairs, 99 based on Foata normal form. 2/1090 useless extension candidates. Maximal degree in co-relation 7793. Up to 797 conditions per place. [2024-06-21 21:20:43,242 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 152 selfloop transitions, 82 changer transitions 0/236 dead transitions. [2024-06-21 21:20:43,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 236 transitions, 2922 flow [2024-06-21 21:20:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:20:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:20:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 21:20:43,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 21:20:43,243 INFO L175 Difference]: Start difference. First operand has 230 places, 218 transitions, 2386 flow. Second operand 12 states and 140 transitions. [2024-06-21 21:20:43,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 236 transitions, 2922 flow [2024-06-21 21:20:43,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 236 transitions, 2800 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:43,430 INFO L231 Difference]: Finished difference. Result has 235 places, 220 transitions, 2472 flow [2024-06-21 21:20:43,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2472, PETRI_PLACES=235, PETRI_TRANSITIONS=220} [2024-06-21 21:20:43,431 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2024-06-21 21:20:43,431 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 220 transitions, 2472 flow [2024-06-21 21:20:43,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:43,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:43,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:43,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:20:43,432 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:43,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:43,432 INFO L85 PathProgramCache]: Analyzing trace with hash 582931114, now seen corresponding path program 7 times [2024-06-21 21:20:43,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:43,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078700982] [2024-06-21 21:20:43,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:43,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:44,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:44,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078700982] [2024-06-21 21:20:44,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078700982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:44,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:44,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:44,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772119484] [2024-06-21 21:20:44,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:44,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:44,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:44,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:44,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:44,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:44,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 220 transitions, 2472 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:44,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:44,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:44,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:44,607 INFO L124 PetriNetUnfolderBase]: 606/1098 cut-off events. [2024-06-21 21:20:44,607 INFO L125 PetriNetUnfolderBase]: For 94610/94610 co-relation queries the response was YES. [2024-06-21 21:20:44,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8066 conditions, 1098 events. 606/1098 cut-off events. For 94610/94610 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5588 event pairs, 107 based on Foata normal form. 2/1098 useless extension candidates. Maximal degree in co-relation 7962. Up to 907 conditions per place. [2024-06-21 21:20:44,616 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 169 selfloop transitions, 63 changer transitions 0/234 dead transitions. [2024-06-21 21:20:44,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 234 transitions, 2982 flow [2024-06-21 21:20:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:44,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 21:20:44,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:20:44,617 INFO L175 Difference]: Start difference. First operand has 235 places, 220 transitions, 2472 flow. Second operand 10 states and 120 transitions. [2024-06-21 21:20:44,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 234 transitions, 2982 flow [2024-06-21 21:20:44,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 234 transitions, 2774 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-21 21:20:44,814 INFO L231 Difference]: Finished difference. Result has 234 places, 221 transitions, 2412 flow [2024-06-21 21:20:44,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2412, PETRI_PLACES=234, PETRI_TRANSITIONS=221} [2024-06-21 21:20:44,814 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 204 predicate places. [2024-06-21 21:20:44,814 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 221 transitions, 2412 flow [2024-06-21 21:20:44,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:44,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:44,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:44,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:20:44,815 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:44,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:44,815 INFO L85 PathProgramCache]: Analyzing trace with hash 578462464, now seen corresponding path program 8 times [2024-06-21 21:20:44,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:44,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129184850] [2024-06-21 21:20:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:44,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:45,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:45,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129184850] [2024-06-21 21:20:45,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129184850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:45,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:45,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:45,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576030025] [2024-06-21 21:20:45,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:45,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:45,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:45,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:45,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:45,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:45,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 221 transitions, 2412 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:45,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:45,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:45,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:45,982 INFO L124 PetriNetUnfolderBase]: 610/1106 cut-off events. [2024-06-21 21:20:45,982 INFO L125 PetriNetUnfolderBase]: For 94681/94681 co-relation queries the response was YES. [2024-06-21 21:20:45,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7999 conditions, 1106 events. 610/1106 cut-off events. For 94681/94681 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5651 event pairs, 95 based on Foata normal form. 2/1106 useless extension candidates. Maximal degree in co-relation 7895. Up to 725 conditions per place. [2024-06-21 21:20:45,991 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 152 selfloop transitions, 86 changer transitions 2/242 dead transitions. [2024-06-21 21:20:45,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 242 transitions, 3104 flow [2024-06-21 21:20:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:20:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:20:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 21:20:45,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 21:20:45,992 INFO L175 Difference]: Start difference. First operand has 234 places, 221 transitions, 2412 flow. Second operand 11 states and 138 transitions. [2024-06-21 21:20:45,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 242 transitions, 3104 flow [2024-06-21 21:20:46,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 242 transitions, 2974 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:46,224 INFO L231 Difference]: Finished difference. Result has 238 places, 222 transitions, 2478 flow [2024-06-21 21:20:46,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2478, PETRI_PLACES=238, PETRI_TRANSITIONS=222} [2024-06-21 21:20:46,225 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2024-06-21 21:20:46,225 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 222 transitions, 2478 flow [2024-06-21 21:20:46,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:46,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:46,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:46,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:20:46,225 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:46,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:46,226 INFO L85 PathProgramCache]: Analyzing trace with hash 578467300, now seen corresponding path program 4 times [2024-06-21 21:20:46,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:46,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633429491] [2024-06-21 21:20:46,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:46,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:46,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:46,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633429491] [2024-06-21 21:20:46,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633429491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:46,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:46,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:46,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817361375] [2024-06-21 21:20:46,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:46,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:46,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:46,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:47,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:47,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 222 transitions, 2478 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:47,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:47,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:47,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:47,394 INFO L124 PetriNetUnfolderBase]: 616/1116 cut-off events. [2024-06-21 21:20:47,394 INFO L125 PetriNetUnfolderBase]: For 97528/97528 co-relation queries the response was YES. [2024-06-21 21:20:47,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8166 conditions, 1116 events. 616/1116 cut-off events. For 97528/97528 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5703 event pairs, 89 based on Foata normal form. 2/1116 useless extension candidates. Maximal degree in co-relation 8061. Up to 784 conditions per place. [2024-06-21 21:20:47,401 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 153 selfloop transitions, 86 changer transitions 0/241 dead transitions. [2024-06-21 21:20:47,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 241 transitions, 3026 flow [2024-06-21 21:20:47,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:20:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:20:47,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 21:20:47,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-21 21:20:47,402 INFO L175 Difference]: Start difference. First operand has 238 places, 222 transitions, 2478 flow. Second operand 11 states and 137 transitions. [2024-06-21 21:20:47,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 241 transitions, 3026 flow [2024-06-21 21:20:47,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 241 transitions, 2840 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 21:20:47,632 INFO L231 Difference]: Finished difference. Result has 240 places, 224 transitions, 2505 flow [2024-06-21 21:20:47,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2505, PETRI_PLACES=240, PETRI_TRANSITIONS=224} [2024-06-21 21:20:47,633 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2024-06-21 21:20:47,633 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 224 transitions, 2505 flow [2024-06-21 21:20:47,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:47,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:47,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:47,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:20:47,633 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:47,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash 578467114, now seen corresponding path program 9 times [2024-06-21 21:20:47,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:47,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736882348] [2024-06-21 21:20:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:47,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:48,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:48,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736882348] [2024-06-21 21:20:48,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736882348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:48,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:48,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:48,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088757935] [2024-06-21 21:20:48,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:48,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:48,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:48,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:48,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:48,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 224 transitions, 2505 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:48,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:48,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:48,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:48,989 INFO L124 PetriNetUnfolderBase]: 613/1111 cut-off events. [2024-06-21 21:20:48,989 INFO L125 PetriNetUnfolderBase]: For 95684/95684 co-relation queries the response was YES. [2024-06-21 21:20:48,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8022 conditions, 1111 events. 613/1111 cut-off events. For 95684/95684 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5688 event pairs, 100 based on Foata normal form. 2/1111 useless extension candidates. Maximal degree in co-relation 7916. Up to 761 conditions per place. [2024-06-21 21:20:48,999 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 153 selfloop transitions, 86 changer transitions 2/243 dead transitions. [2024-06-21 21:20:48,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 243 transitions, 3043 flow [2024-06-21 21:20:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:20:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:20:49,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-21 21:20:49,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:20:49,000 INFO L175 Difference]: Start difference. First operand has 240 places, 224 transitions, 2505 flow. Second operand 12 states and 144 transitions. [2024-06-21 21:20:49,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 243 transitions, 3043 flow [2024-06-21 21:20:49,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 243 transitions, 2810 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-21 21:20:49,244 INFO L231 Difference]: Finished difference. Result has 241 places, 224 transitions, 2455 flow [2024-06-21 21:20:49,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2455, PETRI_PLACES=241, PETRI_TRANSITIONS=224} [2024-06-21 21:20:49,245 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 211 predicate places. [2024-06-21 21:20:49,245 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 224 transitions, 2455 flow [2024-06-21 21:20:49,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:49,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:49,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:49,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:20:49,245 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:49,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:49,246 INFO L85 PathProgramCache]: Analyzing trace with hash -295988182, now seen corresponding path program 10 times [2024-06-21 21:20:49,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:49,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877987734] [2024-06-21 21:20:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:49,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:49,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:49,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877987734] [2024-06-21 21:20:49,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877987734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:49,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:49,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:49,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266962235] [2024-06-21 21:20:49,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:49,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:49,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:49,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:49,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:50,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:50,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 224 transitions, 2455 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:50,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:50,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:50,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:50,349 INFO L124 PetriNetUnfolderBase]: 617/1118 cut-off events. [2024-06-21 21:20:50,349 INFO L125 PetriNetUnfolderBase]: For 97746/97748 co-relation queries the response was YES. [2024-06-21 21:20:50,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8026 conditions, 1118 events. 617/1118 cut-off events. For 97746/97748 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5736 event pairs, 83 based on Foata normal form. 4/1120 useless extension candidates. Maximal degree in co-relation 7921. Up to 794 conditions per place. [2024-06-21 21:20:50,356 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 158 selfloop transitions, 87 changer transitions 0/247 dead transitions. [2024-06-21 21:20:50,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 247 transitions, 3163 flow [2024-06-21 21:20:50,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:50,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:50,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-21 21:20:50,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 21:20:50,363 INFO L175 Difference]: Start difference. First operand has 241 places, 224 transitions, 2455 flow. Second operand 10 states and 130 transitions. [2024-06-21 21:20:50,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 247 transitions, 3163 flow [2024-06-21 21:20:50,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 247 transitions, 2975 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 21:20:50,599 INFO L231 Difference]: Finished difference. Result has 240 places, 226 transitions, 2469 flow [2024-06-21 21:20:50,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2469, PETRI_PLACES=240, PETRI_TRANSITIONS=226} [2024-06-21 21:20:50,600 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2024-06-21 21:20:50,600 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 226 transitions, 2469 flow [2024-06-21 21:20:50,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:50,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:50,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:50,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:20:50,600 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:50,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:50,601 INFO L85 PathProgramCache]: Analyzing trace with hash -295868212, now seen corresponding path program 11 times [2024-06-21 21:20:50,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:50,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095585830] [2024-06-21 21:20:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:50,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:51,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:51,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095585830] [2024-06-21 21:20:51,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095585830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:51,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:51,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:51,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955270275] [2024-06-21 21:20:51,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:51,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:51,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:51,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:51,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:51,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:51,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 226 transitions, 2469 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:51,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:51,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:51,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:51,647 INFO L124 PetriNetUnfolderBase]: 624/1131 cut-off events. [2024-06-21 21:20:51,647 INFO L125 PetriNetUnfolderBase]: For 92340/92342 co-relation queries the response was YES. [2024-06-21 21:20:51,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8012 conditions, 1131 events. 624/1131 cut-off events. For 92340/92342 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5830 event pairs, 107 based on Foata normal form. 4/1133 useless extension candidates. Maximal degree in co-relation 7906. Up to 905 conditions per place. [2024-06-21 21:20:51,657 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 158 selfloop transitions, 87 changer transitions 0/247 dead transitions. [2024-06-21 21:20:51,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 247 transitions, 3045 flow [2024-06-21 21:20:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 21:20:51,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 21:20:51,657 INFO L175 Difference]: Start difference. First operand has 240 places, 226 transitions, 2469 flow. Second operand 10 states and 127 transitions. [2024-06-21 21:20:51,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 247 transitions, 3045 flow [2024-06-21 21:20:51,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 247 transitions, 2801 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:51,868 INFO L231 Difference]: Finished difference. Result has 243 places, 229 transitions, 2439 flow [2024-06-21 21:20:51,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2439, PETRI_PLACES=243, PETRI_TRANSITIONS=229} [2024-06-21 21:20:51,868 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 213 predicate places. [2024-06-21 21:20:51,869 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 229 transitions, 2439 flow [2024-06-21 21:20:51,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:51,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:51,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:51,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:20:51,869 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:51,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:51,870 INFO L85 PathProgramCache]: Analyzing trace with hash -295872862, now seen corresponding path program 12 times [2024-06-21 21:20:51,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:51,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555372954] [2024-06-21 21:20:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:51,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:52,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:52,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555372954] [2024-06-21 21:20:52,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555372954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:52,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:52,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:52,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639129500] [2024-06-21 21:20:52,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:52,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:52,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:52,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:52,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:52,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:52,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 229 transitions, 2439 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:52,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:52,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:52,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:52,890 INFO L124 PetriNetUnfolderBase]: 585/1054 cut-off events. [2024-06-21 21:20:52,891 INFO L125 PetriNetUnfolderBase]: For 60832/60834 co-relation queries the response was YES. [2024-06-21 21:20:52,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6530 conditions, 1054 events. 585/1054 cut-off events. For 60832/60834 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5373 event pairs, 86 based on Foata normal form. 4/1056 useless extension candidates. Maximal degree in co-relation 6424. Up to 814 conditions per place. [2024-06-21 21:20:52,898 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 159 selfloop transitions, 88 changer transitions 0/249 dead transitions. [2024-06-21 21:20:52,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 249 transitions, 2994 flow [2024-06-21 21:20:52,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-21 21:20:52,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-21 21:20:52,899 INFO L175 Difference]: Start difference. First operand has 243 places, 229 transitions, 2439 flow. Second operand 10 states and 129 transitions. [2024-06-21 21:20:52,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 249 transitions, 2994 flow [2024-06-21 21:20:53,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 249 transitions, 2821 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:53,062 INFO L231 Difference]: Finished difference. Result has 246 places, 230 transitions, 2455 flow [2024-06-21 21:20:53,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2455, PETRI_PLACES=246, PETRI_TRANSITIONS=230} [2024-06-21 21:20:53,063 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 216 predicate places. [2024-06-21 21:20:53,063 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 230 transitions, 2455 flow [2024-06-21 21:20:53,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:53,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:53,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:53,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:20:53,063 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)] === [2024-06-21 21:20:53,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:53,064 INFO L85 PathProgramCache]: Analyzing trace with hash -295868026, now seen corresponding path program 5 times [2024-06-21 21:20:53,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:53,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726894879] [2024-06-21 21:20:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:53,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:53,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:53,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726894879] [2024-06-21 21:20:53,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726894879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:53,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:53,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:53,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2265308] [2024-06-21 21:20:53,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:53,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:53,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:53,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:53,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:53,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:53,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 230 transitions, 2455 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:53,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:53,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:53,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:54,109 INFO L124 PetriNetUnfolderBase]: 591/1064 cut-off events. [2024-06-21 21:20:54,109 INFO L125 PetriNetUnfolderBase]: For 62762/62764 co-relation queries the response was YES. [2024-06-21 21:20:54,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6637 conditions, 1064 events. 591/1064 cut-off events. For 62762/62764 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5452 event pairs, 68 based on Foata normal form. 4/1066 useless extension candidates. Maximal degree in co-relation 6530. Up to 605 conditions per place. [2024-06-21 21:20:54,116 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 139 selfloop transitions, 114 changer transitions 0/255 dead transitions. [2024-06-21 21:20:54,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 255 transitions, 3201 flow [2024-06-21 21:20:54,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-21 21:20:54,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44193548387096776 [2024-06-21 21:20:54,117 INFO L175 Difference]: Start difference. First operand has 246 places, 230 transitions, 2455 flow. Second operand 10 states and 137 transitions. [2024-06-21 21:20:54,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 255 transitions, 3201 flow [2024-06-21 21:20:54,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 255 transitions, 3023 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:54,292 INFO L231 Difference]: Finished difference. Result has 248 places, 232 transitions, 2546 flow [2024-06-21 21:20:54,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2277, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2546, PETRI_PLACES=248, PETRI_TRANSITIONS=232} [2024-06-21 21:20:54,293 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2024-06-21 21:20:54,293 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 232 transitions, 2546 flow [2024-06-21 21:20:54,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:54,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:54,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:54,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:20:54,293 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)] === [2024-06-21 21:20:54,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash -124992802, now seen corresponding path program 13 times [2024-06-21 21:20:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:54,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649097042] [2024-06-21 21:20:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:54,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:54,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:54,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649097042] [2024-06-21 21:20:54,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649097042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:54,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:54,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:54,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744183137] [2024-06-21 21:20:54,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:54,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:54,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:54,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:54,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:55,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:55,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 232 transitions, 2546 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:55,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:55,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:55,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:55,432 INFO L124 PetriNetUnfolderBase]: 618/1122 cut-off events. [2024-06-21 21:20:55,432 INFO L125 PetriNetUnfolderBase]: For 95997/95997 co-relation queries the response was YES. [2024-06-21 21:20:55,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6964 conditions, 1122 events. 618/1122 cut-off events. For 95997/95997 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5828 event pairs, 78 based on Foata normal form. 14/1134 useless extension candidates. Maximal degree in co-relation 6856. Up to 774 conditions per place. [2024-06-21 21:20:55,440 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 171 selfloop transitions, 71 changer transitions 15/259 dead transitions. [2024-06-21 21:20:55,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 259 transitions, 3182 flow [2024-06-21 21:20:55,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:55,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-21 21:20:55,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-06-21 21:20:55,441 INFO L175 Difference]: Start difference. First operand has 248 places, 232 transitions, 2546 flow. Second operand 10 states and 133 transitions. [2024-06-21 21:20:55,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 259 transitions, 3182 flow [2024-06-21 21:20:55,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 259 transitions, 2906 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:55,616 INFO L231 Difference]: Finished difference. Result has 251 places, 228 transitions, 2397 flow [2024-06-21 21:20:55,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2397, PETRI_PLACES=251, PETRI_TRANSITIONS=228} [2024-06-21 21:20:55,617 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 221 predicate places. [2024-06-21 21:20:55,617 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 228 transitions, 2397 flow [2024-06-21 21:20:55,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:55,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:55,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:55,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:20:55,617 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)] === [2024-06-21 21:20:55,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:55,617 INFO L85 PathProgramCache]: Analyzing trace with hash -124992616, now seen corresponding path program 6 times [2024-06-21 21:20:55,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:55,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140166864] [2024-06-21 21:20:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:55,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:56,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:56,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140166864] [2024-06-21 21:20:56,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140166864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:56,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:56,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:56,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748859658] [2024-06-21 21:20:56,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:56,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:56,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:56,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:56,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:56,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:56,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 228 transitions, 2397 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:56,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:56,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:56,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:56,788 INFO L124 PetriNetUnfolderBase]: 584/1060 cut-off events. [2024-06-21 21:20:56,788 INFO L125 PetriNetUnfolderBase]: For 66633/66633 co-relation queries the response was YES. [2024-06-21 21:20:56,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6612 conditions, 1060 events. 584/1060 cut-off events. For 66633/66633 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5482 event pairs, 72 based on Foata normal form. 2/1060 useless extension candidates. Maximal degree in co-relation 6502. Up to 784 conditions per place. [2024-06-21 21:20:56,796 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 172 selfloop transitions, 72 changer transitions 3/249 dead transitions. [2024-06-21 21:20:56,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 249 transitions, 2981 flow [2024-06-21 21:20:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:20:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:20:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 21:20:56,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 21:20:56,797 INFO L175 Difference]: Start difference. First operand has 251 places, 228 transitions, 2397 flow. Second operand 11 states and 133 transitions. [2024-06-21 21:20:56,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 249 transitions, 2981 flow [2024-06-21 21:20:56,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 249 transitions, 2836 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:56,958 INFO L231 Difference]: Finished difference. Result has 255 places, 230 transitions, 2448 flow [2024-06-21 21:20:56,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2448, PETRI_PLACES=255, PETRI_TRANSITIONS=230} [2024-06-21 21:20:56,958 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 225 predicate places. [2024-06-21 21:20:56,958 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 230 transitions, 2448 flow [2024-06-21 21:20:56,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:56,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:56,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:56,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:20:56,959 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)] === [2024-06-21 21:20:56,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:56,959 INFO L85 PathProgramCache]: Analyzing trace with hash -757138520, now seen corresponding path program 7 times [2024-06-21 21:20:56,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:56,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711670352] [2024-06-21 21:20:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:56,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:57,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:57,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711670352] [2024-06-21 21:20:57,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711670352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:57,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:57,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:57,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140982398] [2024-06-21 21:20:57,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:57,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:57,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:57,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:57,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:57,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:57,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 230 transitions, 2448 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:57,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:57,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:57,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:58,029 INFO L124 PetriNetUnfolderBase]: 601/1084 cut-off events. [2024-06-21 21:20:58,030 INFO L125 PetriNetUnfolderBase]: For 73972/73974 co-relation queries the response was YES. [2024-06-21 21:20:58,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6993 conditions, 1084 events. 601/1084 cut-off events. For 73972/73974 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5564 event pairs, 69 based on Foata normal form. 4/1086 useless extension candidates. Maximal degree in co-relation 6881. Up to 767 conditions per place. [2024-06-21 21:20:58,039 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 168 selfloop transitions, 88 changer transitions 0/258 dead transitions. [2024-06-21 21:20:58,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 258 transitions, 3267 flow [2024-06-21 21:20:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-21 21:20:58,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-21 21:20:58,040 INFO L175 Difference]: Start difference. First operand has 255 places, 230 transitions, 2448 flow. Second operand 10 states and 135 transitions. [2024-06-21 21:20:58,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 258 transitions, 3267 flow [2024-06-21 21:20:58,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 258 transitions, 3099 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:58,245 INFO L231 Difference]: Finished difference. Result has 257 places, 236 transitions, 2567 flow [2024-06-21 21:20:58,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2280, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2567, PETRI_PLACES=257, PETRI_TRANSITIONS=236} [2024-06-21 21:20:58,246 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 227 predicate places. [2024-06-21 21:20:58,246 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 236 transitions, 2567 flow [2024-06-21 21:20:58,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:58,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:58,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:58,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:20:58,246 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)] === [2024-06-21 21:20:58,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:58,247 INFO L85 PathProgramCache]: Analyzing trace with hash -757138706, now seen corresponding path program 14 times [2024-06-21 21:20:58,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:58,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191611754] [2024-06-21 21:20:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:58,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:58,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:58,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191611754] [2024-06-21 21:20:58,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191611754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:58,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:58,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:58,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027858784] [2024-06-21 21:20:58,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:58,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:58,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:58,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:58,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:59,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:20:59,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 236 transitions, 2567 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:59,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:59,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:20:59,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:59,487 INFO L124 PetriNetUnfolderBase]: 625/1136 cut-off events. [2024-06-21 21:20:59,487 INFO L125 PetriNetUnfolderBase]: For 109656/109658 co-relation queries the response was YES. [2024-06-21 21:20:59,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7225 conditions, 1136 events. 625/1136 cut-off events. For 109656/109658 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5937 event pairs, 79 based on Foata normal form. 16/1150 useless extension candidates. Maximal degree in co-relation 7111. Up to 794 conditions per place. [2024-06-21 21:20:59,496 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 169 selfloop transitions, 77 changer transitions 15/263 dead transitions. [2024-06-21 21:20:59,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 263 transitions, 3196 flow [2024-06-21 21:20:59,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:20:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:20:59,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-21 21:20:59,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 21:20:59,497 INFO L175 Difference]: Start difference. First operand has 257 places, 236 transitions, 2567 flow. Second operand 11 states and 143 transitions. [2024-06-21 21:20:59,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 263 transitions, 3196 flow [2024-06-21 21:20:59,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 263 transitions, 3057 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 21:20:59,698 INFO L231 Difference]: Finished difference. Result has 263 places, 230 transitions, 2524 flow [2024-06-21 21:20:59,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2428, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2524, PETRI_PLACES=263, PETRI_TRANSITIONS=230} [2024-06-21 21:20:59,698 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 233 predicate places. [2024-06-21 21:20:59,698 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 230 transitions, 2524 flow [2024-06-21 21:20:59,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:59,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:59,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:59,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:20:59,699 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)] === [2024-06-21 21:20:59,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:59,699 INFO L85 PathProgramCache]: Analyzing trace with hash -291404212, now seen corresponding path program 15 times [2024-06-21 21:20:59,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:59,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352616385] [2024-06-21 21:20:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:59,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:00,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:00,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352616385] [2024-06-21 21:21:00,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352616385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:00,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:00,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:00,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417979740] [2024-06-21 21:21:00,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:00,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:00,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:00,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:00,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:00,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:00,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 230 transitions, 2524 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:00,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:00,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:00,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:00,728 INFO L124 PetriNetUnfolderBase]: 589/1072 cut-off events. [2024-06-21 21:21:00,728 INFO L125 PetriNetUnfolderBase]: For 77459/77461 co-relation queries the response was YES. [2024-06-21 21:21:00,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7059 conditions, 1072 events. 589/1072 cut-off events. For 77459/77461 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5559 event pairs, 85 based on Foata normal form. 4/1074 useless extension candidates. Maximal degree in co-relation 6943. Up to 886 conditions per place. [2024-06-21 21:21:00,737 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 179 selfloop transitions, 66 changer transitions 1/248 dead transitions. [2024-06-21 21:21:00,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 248 transitions, 3081 flow [2024-06-21 21:21:00,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:00,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 21:21:00,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:21:00,738 INFO L175 Difference]: Start difference. First operand has 263 places, 230 transitions, 2524 flow. Second operand 10 states and 124 transitions. [2024-06-21 21:21:00,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 248 transitions, 3081 flow [2024-06-21 21:21:00,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 248 transitions, 2919 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:00,922 INFO L231 Difference]: Finished difference. Result has 264 places, 231 transitions, 2513 flow [2024-06-21 21:21:00,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2362, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2513, PETRI_PLACES=264, PETRI_TRANSITIONS=231} [2024-06-21 21:21:00,923 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 234 predicate places. [2024-06-21 21:21:00,923 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 231 transitions, 2513 flow [2024-06-21 21:21:00,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:00,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:00,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:00,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:21:00,924 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)] === [2024-06-21 21:21:00,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:00,924 INFO L85 PathProgramCache]: Analyzing trace with hash -590909576, now seen corresponding path program 16 times [2024-06-21 21:21:00,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:00,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640038824] [2024-06-21 21:21:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:00,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:01,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:01,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640038824] [2024-06-21 21:21:01,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640038824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:01,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:01,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:01,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893815815] [2024-06-21 21:21:01,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:01,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:01,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:01,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:01,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:01,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:01,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 231 transitions, 2513 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:01,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:01,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:01,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:02,130 INFO L124 PetriNetUnfolderBase]: 634/1160 cut-off events. [2024-06-21 21:21:02,130 INFO L125 PetriNetUnfolderBase]: For 120175/120175 co-relation queries the response was YES. [2024-06-21 21:21:02,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8425 conditions, 1160 events. 634/1160 cut-off events. For 120175/120175 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6099 event pairs, 91 based on Foata normal form. 2/1160 useless extension candidates. Maximal degree in co-relation 8308. Up to 751 conditions per place. [2024-06-21 21:21:02,140 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 176 selfloop transitions, 79 changer transitions 0/257 dead transitions. [2024-06-21 21:21:02,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 257 transitions, 3439 flow [2024-06-21 21:21:02,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-21 21:21:02,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-21 21:21:02,141 INFO L175 Difference]: Start difference. First operand has 264 places, 231 transitions, 2513 flow. Second operand 10 states and 135 transitions. [2024-06-21 21:21:02,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 257 transitions, 3439 flow [2024-06-21 21:21:02,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 257 transitions, 3297 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:02,448 INFO L231 Difference]: Finished difference. Result has 266 places, 233 transitions, 2565 flow [2024-06-21 21:21:02,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2565, PETRI_PLACES=266, PETRI_TRANSITIONS=233} [2024-06-21 21:21:02,448 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 236 predicate places. [2024-06-21 21:21:02,448 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 233 transitions, 2565 flow [2024-06-21 21:21:02,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:02,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:02,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:02,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:21:02,449 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)] === [2024-06-21 21:21:02,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash -125165596, now seen corresponding path program 8 times [2024-06-21 21:21:02,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:02,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191263886] [2024-06-21 21:21:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:02,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:03,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:03,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191263886] [2024-06-21 21:21:03,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191263886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:03,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:03,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:03,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980301188] [2024-06-21 21:21:03,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:03,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:03,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:03,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:03,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:03,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:03,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 233 transitions, 2565 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:03,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:03,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:03,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:03,590 INFO L124 PetriNetUnfolderBase]: 650/1186 cut-off events. [2024-06-21 21:21:03,590 INFO L125 PetriNetUnfolderBase]: For 129995/129995 co-relation queries the response was YES. [2024-06-21 21:21:03,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8867 conditions, 1186 events. 650/1186 cut-off events. For 129995/129995 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 6249 event pairs, 91 based on Foata normal form. 2/1186 useless extension candidates. Maximal degree in co-relation 8749. Up to 856 conditions per place. [2024-06-21 21:21:03,600 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 171 selfloop transitions, 82 changer transitions 0/255 dead transitions. [2024-06-21 21:21:03,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 255 transitions, 3355 flow [2024-06-21 21:21:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-21 21:21:03,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-21 21:21:03,601 INFO L175 Difference]: Start difference. First operand has 266 places, 233 transitions, 2565 flow. Second operand 10 states and 131 transitions. [2024-06-21 21:21:03,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 255 transitions, 3355 flow [2024-06-21 21:21:03,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 255 transitions, 3240 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:21:03,947 INFO L231 Difference]: Finished difference. Result has 270 places, 237 transitions, 2711 flow [2024-06-21 21:21:03,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2711, PETRI_PLACES=270, PETRI_TRANSITIONS=237} [2024-06-21 21:21:03,948 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2024-06-21 21:21:03,948 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 237 transitions, 2711 flow [2024-06-21 21:21:03,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:03,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:03,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:03,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:21:03,949 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)] === [2024-06-21 21:21:03,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:03,949 INFO L85 PathProgramCache]: Analyzing trace with hash -590904926, now seen corresponding path program 17 times [2024-06-21 21:21:03,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:03,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49561895] [2024-06-21 21:21:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:03,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:04,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:04,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49561895] [2024-06-21 21:21:04,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49561895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:04,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:04,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:04,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453231980] [2024-06-21 21:21:04,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:04,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:04,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:04,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:04,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:04,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:04,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 237 transitions, 2711 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:04,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:04,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:04,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:05,200 INFO L124 PetriNetUnfolderBase]: 654/1194 cut-off events. [2024-06-21 21:21:05,200 INFO L125 PetriNetUnfolderBase]: For 133957/133957 co-relation queries the response was YES. [2024-06-21 21:21:05,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9086 conditions, 1194 events. 654/1194 cut-off events. For 133957/133957 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6316 event pairs, 98 based on Foata normal form. 2/1194 useless extension candidates. Maximal degree in co-relation 8966. Up to 897 conditions per place. [2024-06-21 21:21:05,210 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 174 selfloop transitions, 80 changer transitions 0/256 dead transitions. [2024-06-21 21:21:05,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 256 transitions, 3434 flow [2024-06-21 21:21:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:05,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:05,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 21:21:05,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 21:21:05,211 INFO L175 Difference]: Start difference. First operand has 270 places, 237 transitions, 2711 flow. Second operand 11 states and 136 transitions. [2024-06-21 21:21:05,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 256 transitions, 3434 flow [2024-06-21 21:21:05,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 256 transitions, 3290 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 21:21:05,536 INFO L231 Difference]: Finished difference. Result has 274 places, 238 transitions, 2753 flow [2024-06-21 21:21:05,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2567, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2753, PETRI_PLACES=274, PETRI_TRANSITIONS=238} [2024-06-21 21:21:05,536 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 244 predicate places. [2024-06-21 21:21:05,536 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 238 transitions, 2753 flow [2024-06-21 21:21:05,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:05,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:05,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:05,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:21:05,537 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)] === [2024-06-21 21:21:05,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:05,537 INFO L85 PathProgramCache]: Analyzing trace with hash -118736506, now seen corresponding path program 9 times [2024-06-21 21:21:05,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:05,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876479864] [2024-06-21 21:21:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:05,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:06,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:06,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876479864] [2024-06-21 21:21:06,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876479864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:06,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:06,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:06,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823170210] [2024-06-21 21:21:06,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:06,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:06,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:06,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:06,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:06,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:06,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 238 transitions, 2753 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:06,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:06,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:06,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:06,715 INFO L124 PetriNetUnfolderBase]: 662/1208 cut-off events. [2024-06-21 21:21:06,715 INFO L125 PetriNetUnfolderBase]: For 130233/130233 co-relation queries the response was YES. [2024-06-21 21:21:06,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9143 conditions, 1208 events. 662/1208 cut-off events. For 130233/130233 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6415 event pairs, 99 based on Foata normal form. 2/1208 useless extension candidates. Maximal degree in co-relation 9022. Up to 915 conditions per place. [2024-06-21 21:21:06,726 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 179 selfloop transitions, 80 changer transitions 0/261 dead transitions. [2024-06-21 21:21:06,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 261 transitions, 3527 flow [2024-06-21 21:21:06,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 21:21:06,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-21 21:21:06,727 INFO L175 Difference]: Start difference. First operand has 274 places, 238 transitions, 2753 flow. Second operand 11 states and 137 transitions. [2024-06-21 21:21:06,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 261 transitions, 3527 flow [2024-06-21 21:21:06,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 261 transitions, 3354 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:07,000 INFO L231 Difference]: Finished difference. Result has 276 places, 242 transitions, 2800 flow [2024-06-21 21:21:07,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2800, PETRI_PLACES=276, PETRI_TRANSITIONS=242} [2024-06-21 21:21:07,000 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 246 predicate places. [2024-06-21 21:21:07,000 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 242 transitions, 2800 flow [2024-06-21 21:21:07,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:07,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:07,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:07,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:21:07,001 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)] === [2024-06-21 21:21:07,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:07,001 INFO L85 PathProgramCache]: Analyzing trace with hash -291226396, now seen corresponding path program 10 times [2024-06-21 21:21:07,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:07,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446808261] [2024-06-21 21:21:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:07,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:07,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:07,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446808261] [2024-06-21 21:21:07,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446808261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:07,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:07,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:07,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604783105] [2024-06-21 21:21:07,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:07,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:07,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:07,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:07,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:07,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:07,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 242 transitions, 2800 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:07,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:07,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:07,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:08,182 INFO L124 PetriNetUnfolderBase]: 658/1201 cut-off events. [2024-06-21 21:21:08,182 INFO L125 PetriNetUnfolderBase]: For 126620/126622 co-relation queries the response was YES. [2024-06-21 21:21:08,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8963 conditions, 1201 events. 658/1201 cut-off events. For 126620/126622 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6384 event pairs, 104 based on Foata normal form. 4/1203 useless extension candidates. Maximal degree in co-relation 8841. Up to 939 conditions per place. [2024-06-21 21:21:08,193 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 179 selfloop transitions, 78 changer transitions 0/259 dead transitions. [2024-06-21 21:21:08,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 259 transitions, 3358 flow [2024-06-21 21:21:08,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 21:21:08,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 21:21:08,194 INFO L175 Difference]: Start difference. First operand has 276 places, 242 transitions, 2800 flow. Second operand 10 states and 125 transitions. [2024-06-21 21:21:08,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 259 transitions, 3358 flow [2024-06-21 21:21:08,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 259 transitions, 3126 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:08,500 INFO L231 Difference]: Finished difference. Result has 277 places, 242 transitions, 2729 flow [2024-06-21 21:21:08,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2568, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2729, PETRI_PLACES=277, PETRI_TRANSITIONS=242} [2024-06-21 21:21:08,500 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 247 predicate places. [2024-06-21 21:21:08,500 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 242 transitions, 2729 flow [2024-06-21 21:21:08,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:08,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:08,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:08,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:21:08,500 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)] === [2024-06-21 21:21:08,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:08,501 INFO L85 PathProgramCache]: Analyzing trace with hash -118499356, now seen corresponding path program 11 times [2024-06-21 21:21:08,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:08,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888053845] [2024-06-21 21:21:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:08,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:09,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:09,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888053845] [2024-06-21 21:21:09,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888053845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:09,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:09,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:09,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670774606] [2024-06-21 21:21:09,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:09,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:09,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:09,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:09,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:09,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:09,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 242 transitions, 2729 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:09,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:09,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:09,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:09,909 INFO L124 PetriNetUnfolderBase]: 670/1222 cut-off events. [2024-06-21 21:21:09,909 INFO L125 PetriNetUnfolderBase]: For 129420/129420 co-relation queries the response was YES. [2024-06-21 21:21:09,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9017 conditions, 1222 events. 670/1222 cut-off events. For 129420/129420 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 6516 event pairs, 100 based on Foata normal form. 2/1222 useless extension candidates. Maximal degree in co-relation 8895. Up to 954 conditions per place. [2024-06-21 21:21:09,919 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 185 selfloop transitions, 74 changer transitions 0/261 dead transitions. [2024-06-21 21:21:09,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 261 transitions, 3337 flow [2024-06-21 21:21:09,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:09,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:09,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 21:21:09,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 21:21:09,920 INFO L175 Difference]: Start difference. First operand has 277 places, 242 transitions, 2729 flow. Second operand 10 states and 123 transitions. [2024-06-21 21:21:09,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 261 transitions, 3337 flow [2024-06-21 21:21:10,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 261 transitions, 3161 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:21:10,242 INFO L231 Difference]: Finished difference. Result has 277 places, 246 transitions, 2773 flow [2024-06-21 21:21:10,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2553, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2773, PETRI_PLACES=277, PETRI_TRANSITIONS=246} [2024-06-21 21:21:10,242 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 247 predicate places. [2024-06-21 21:21:10,242 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 246 transitions, 2773 flow [2024-06-21 21:21:10,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:10,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:10,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:10,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:21:10,243 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)] === [2024-06-21 21:21:10,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:10,243 INFO L85 PathProgramCache]: Analyzing trace with hash -118736692, now seen corresponding path program 18 times [2024-06-21 21:21:10,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:10,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057268551] [2024-06-21 21:21:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:10,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:10,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:10,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057268551] [2024-06-21 21:21:10,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057268551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:10,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:10,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:10,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445390646] [2024-06-21 21:21:10,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:10,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:10,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:10,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:10,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:10,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:10,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 246 transitions, 2773 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:10,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:10,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:10,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:11,326 INFO L124 PetriNetUnfolderBase]: 647/1183 cut-off events. [2024-06-21 21:21:11,326 INFO L125 PetriNetUnfolderBase]: For 125165/125165 co-relation queries the response was YES. [2024-06-21 21:21:11,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7575 conditions, 1183 events. 647/1183 cut-off events. For 125165/125165 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 6311 event pairs, 81 based on Foata normal form. 16/1197 useless extension candidates. Maximal degree in co-relation 7453. Up to 809 conditions per place. [2024-06-21 21:21:11,336 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 175 selfloop transitions, 62 changer transitions 28/267 dead transitions. [2024-06-21 21:21:11,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 267 transitions, 3375 flow [2024-06-21 21:21:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:11,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-21 21:21:11,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-21 21:21:11,337 INFO L175 Difference]: Start difference. First operand has 277 places, 246 transitions, 2773 flow. Second operand 10 states and 131 transitions. [2024-06-21 21:21:11,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 267 transitions, 3375 flow [2024-06-21 21:21:11,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 267 transitions, 3182 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 21:21:11,560 INFO L231 Difference]: Finished difference. Result has 281 places, 225 transitions, 2459 flow [2024-06-21 21:21:11,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2459, PETRI_PLACES=281, PETRI_TRANSITIONS=225} [2024-06-21 21:21:11,560 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2024-06-21 21:21:11,560 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 225 transitions, 2459 flow [2024-06-21 21:21:11,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:11,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:11,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:11,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:21:11,561 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)] === [2024-06-21 21:21:11,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:11,561 INFO L85 PathProgramCache]: Analyzing trace with hash -217841374, now seen corresponding path program 1 times [2024-06-21 21:21:11,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:11,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426288641] [2024-06-21 21:21:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:11,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:12,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:12,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426288641] [2024-06-21 21:21:12,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426288641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:12,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:12,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:12,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998479955] [2024-06-21 21:21:12,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:12,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:12,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:12,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:12,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:12,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:12,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 225 transitions, 2459 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:12,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:12,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:12,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:12,836 INFO L124 PetriNetUnfolderBase]: 570/1056 cut-off events. [2024-06-21 21:21:12,836 INFO L125 PetriNetUnfolderBase]: For 81556/81556 co-relation queries the response was YES. [2024-06-21 21:21:12,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6833 conditions, 1056 events. 570/1056 cut-off events. For 81556/81556 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5587 event pairs, 85 based on Foata normal form. 2/1056 useless extension candidates. Maximal degree in co-relation 6711. Up to 986 conditions per place. [2024-06-21 21:21:12,843 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 213 selfloop transitions, 27 changer transitions 0/242 dead transitions. [2024-06-21 21:21:12,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 242 transitions, 3006 flow [2024-06-21 21:21:12,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:12,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 21:21:12,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-21 21:21:12,844 INFO L175 Difference]: Start difference. First operand has 281 places, 225 transitions, 2459 flow. Second operand 10 states and 112 transitions. [2024-06-21 21:21:12,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 242 transitions, 3006 flow [2024-06-21 21:21:13,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 242 transitions, 2794 flow, removed 5 selfloop flow, removed 17 redundant places. [2024-06-21 21:21:13,007 INFO L231 Difference]: Finished difference. Result has 273 places, 230 transitions, 2377 flow [2024-06-21 21:21:13,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2247, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2377, PETRI_PLACES=273, PETRI_TRANSITIONS=230} [2024-06-21 21:21:13,007 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 243 predicate places. [2024-06-21 21:21:13,008 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 230 transitions, 2377 flow [2024-06-21 21:21:13,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:13,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:13,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:13,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:21:13,008 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)] === [2024-06-21 21:21:13,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:13,008 INFO L85 PathProgramCache]: Analyzing trace with hash -897090206, now seen corresponding path program 2 times [2024-06-21 21:21:13,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:13,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824980262] [2024-06-21 21:21:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:13,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:13,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:13,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824980262] [2024-06-21 21:21:13,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824980262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:13,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:13,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:13,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427203261] [2024-06-21 21:21:13,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:13,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:13,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:13,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:13,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:14,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:14,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 230 transitions, 2377 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:14,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:14,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:14,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:14,447 INFO L124 PetriNetUnfolderBase]: 574/1064 cut-off events. [2024-06-21 21:21:14,447 INFO L125 PetriNetUnfolderBase]: For 77921/77921 co-relation queries the response was YES. [2024-06-21 21:21:14,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6785 conditions, 1064 events. 574/1064 cut-off events. For 77921/77921 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5650 event pairs, 87 based on Foata normal form. 2/1064 useless extension candidates. Maximal degree in co-relation 6663. Up to 1021 conditions per place. [2024-06-21 21:21:14,456 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 222 selfloop transitions, 19 changer transitions 0/243 dead transitions. [2024-06-21 21:21:14,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 243 transitions, 2911 flow [2024-06-21 21:21:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-21 21:21:14,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-21 21:21:14,457 INFO L175 Difference]: Start difference. First operand has 273 places, 230 transitions, 2377 flow. Second operand 10 states and 109 transitions. [2024-06-21 21:21:14,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 243 transitions, 2911 flow [2024-06-21 21:21:14,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 243 transitions, 2789 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:14,649 INFO L231 Difference]: Finished difference. Result has 275 places, 231 transitions, 2321 flow [2024-06-21 21:21:14,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2321, PETRI_PLACES=275, PETRI_TRANSITIONS=231} [2024-06-21 21:21:14,649 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2024-06-21 21:21:14,649 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 231 transitions, 2321 flow [2024-06-21 21:21:14,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:14,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:14,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:14,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:21:14,650 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)] === [2024-06-21 21:21:14,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:14,650 INFO L85 PathProgramCache]: Analyzing trace with hash -258671424, now seen corresponding path program 3 times [2024-06-21 21:21:14,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:14,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062846437] [2024-06-21 21:21:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:14,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:15,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:15,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062846437] [2024-06-21 21:21:15,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062846437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:15,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:15,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:15,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632433693] [2024-06-21 21:21:15,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:15,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:15,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:15,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:15,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:15,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:15,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 231 transitions, 2321 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:15,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:15,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:15,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:15,977 INFO L124 PetriNetUnfolderBase]: 578/1072 cut-off events. [2024-06-21 21:21:15,977 INFO L125 PetriNetUnfolderBase]: For 79403/79403 co-relation queries the response was YES. [2024-06-21 21:21:15,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6788 conditions, 1072 events. 578/1072 cut-off events. For 79403/79403 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 5685 event pairs, 84 based on Foata normal form. 2/1072 useless extension candidates. Maximal degree in co-relation 6665. Up to 1026 conditions per place. [2024-06-21 21:21:15,986 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 222 selfloop transitions, 20 changer transitions 0/244 dead transitions. [2024-06-21 21:21:15,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 244 transitions, 2859 flow [2024-06-21 21:21:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 21:21:15,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:21:15,987 INFO L175 Difference]: Start difference. First operand has 275 places, 231 transitions, 2321 flow. Second operand 10 states and 110 transitions. [2024-06-21 21:21:15,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 244 transitions, 2859 flow [2024-06-21 21:21:16,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 244 transitions, 2786 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:16,209 INFO L231 Difference]: Finished difference. Result has 276 places, 232 transitions, 2318 flow [2024-06-21 21:21:16,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2248, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2318, PETRI_PLACES=276, PETRI_TRANSITIONS=232} [2024-06-21 21:21:16,210 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 246 predicate places. [2024-06-21 21:21:16,210 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 232 transitions, 2318 flow [2024-06-21 21:21:16,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:16,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:16,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:16,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:21:16,211 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)] === [2024-06-21 21:21:16,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:16,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1767062212, now seen corresponding path program 4 times [2024-06-21 21:21:16,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:16,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907211694] [2024-06-21 21:21:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:16,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:17,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:17,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907211694] [2024-06-21 21:21:17,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907211694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:17,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:17,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:17,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398156654] [2024-06-21 21:21:17,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:17,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:17,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:17,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:17,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:17,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:17,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 232 transitions, 2318 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:17,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:17,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:17,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:17,564 INFO L124 PetriNetUnfolderBase]: 582/1080 cut-off events. [2024-06-21 21:21:17,564 INFO L125 PetriNetUnfolderBase]: For 81447/81447 co-relation queries the response was YES. [2024-06-21 21:21:17,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6834 conditions, 1080 events. 582/1080 cut-off events. For 81447/81447 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 5745 event pairs, 89 based on Foata normal form. 2/1080 useless extension candidates. Maximal degree in co-relation 6711. Up to 1038 conditions per place. [2024-06-21 21:21:17,573 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 223 selfloop transitions, 19 changer transitions 0/244 dead transitions. [2024-06-21 21:21:17,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 244 transitions, 2854 flow [2024-06-21 21:21:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:17,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:17,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-21 21:21:17,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-21 21:21:17,574 INFO L175 Difference]: Start difference. First operand has 276 places, 232 transitions, 2318 flow. Second operand 10 states and 107 transitions. [2024-06-21 21:21:17,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 244 transitions, 2854 flow [2024-06-21 21:21:17,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 244 transitions, 2775 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 21:21:17,799 INFO L231 Difference]: Finished difference. Result has 276 places, 233 transitions, 2310 flow [2024-06-21 21:21:17,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2310, PETRI_PLACES=276, PETRI_TRANSITIONS=233} [2024-06-21 21:21:17,799 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 246 predicate places. [2024-06-21 21:21:17,799 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 233 transitions, 2310 flow [2024-06-21 21:21:17,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:17,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:17,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:17,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:21:17,800 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)] === [2024-06-21 21:21:17,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:17,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2103759606, now seen corresponding path program 12 times [2024-06-21 21:21:17,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:17,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896955438] [2024-06-21 21:21:17,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:17,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:18,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:18,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896955438] [2024-06-21 21:21:18,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896955438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:18,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:18,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:18,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681303800] [2024-06-21 21:21:18,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:18,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:18,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:18,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:18,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:18,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:18,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 233 transitions, 2310 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:18,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:18,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:18,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:18,931 INFO L124 PetriNetUnfolderBase]: 588/1090 cut-off events. [2024-06-21 21:21:18,931 INFO L125 PetriNetUnfolderBase]: For 83584/83584 co-relation queries the response was YES. [2024-06-21 21:21:18,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6888 conditions, 1090 events. 588/1090 cut-off events. For 83584/83584 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 5795 event pairs, 86 based on Foata normal form. 2/1090 useless extension candidates. Maximal degree in co-relation 6765. Up to 995 conditions per place. [2024-06-21 21:21:18,940 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 214 selfloop transitions, 34 changer transitions 0/250 dead transitions. [2024-06-21 21:21:18,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 250 transitions, 2896 flow [2024-06-21 21:21:18,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 21:21:18,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 21:21:18,941 INFO L175 Difference]: Start difference. First operand has 276 places, 233 transitions, 2310 flow. Second operand 11 states and 126 transitions. [2024-06-21 21:21:18,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 250 transitions, 2896 flow [2024-06-21 21:21:19,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 250 transitions, 2837 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:19,169 INFO L231 Difference]: Finished difference. Result has 279 places, 235 transitions, 2376 flow [2024-06-21 21:21:19,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2251, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2376, PETRI_PLACES=279, PETRI_TRANSITIONS=235} [2024-06-21 21:21:19,170 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 249 predicate places. [2024-06-21 21:21:19,170 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 235 transitions, 2376 flow [2024-06-21 21:21:19,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:19,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:19,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:19,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:21:19,170 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)] === [2024-06-21 21:21:19,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:19,170 INFO L85 PathProgramCache]: Analyzing trace with hash -254670694, now seen corresponding path program 19 times [2024-06-21 21:21:19,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:19,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124799361] [2024-06-21 21:21:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:19,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:19,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:19,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124799361] [2024-06-21 21:21:19,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124799361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:19,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:19,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:19,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281480896] [2024-06-21 21:21:19,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:19,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:19,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:19,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:19,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:19,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:19,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 235 transitions, 2376 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:19,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:19,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:19,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:20,287 INFO L124 PetriNetUnfolderBase]: 612/1142 cut-off events. [2024-06-21 21:21:20,288 INFO L125 PetriNetUnfolderBase]: For 130485/130485 co-relation queries the response was YES. [2024-06-21 21:21:20,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7108 conditions, 1142 events. 612/1142 cut-off events. For 130485/130485 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6145 event pairs, 90 based on Foata normal form. 14/1154 useless extension candidates. Maximal degree in co-relation 6984. Up to 995 conditions per place. [2024-06-21 21:21:20,297 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 213 selfloop transitions, 28 changer transitions 12/255 dead transitions. [2024-06-21 21:21:20,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 255 transitions, 2975 flow [2024-06-21 21:21:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 21:21:20,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 21:21:20,297 INFO L175 Difference]: Start difference. First operand has 279 places, 235 transitions, 2376 flow. Second operand 10 states and 122 transitions. [2024-06-21 21:21:20,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 255 transitions, 2975 flow [2024-06-21 21:21:20,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 255 transitions, 2873 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:20,510 INFO L231 Difference]: Finished difference. Result has 281 places, 231 transitions, 2307 flow [2024-06-21 21:21:20,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2274, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2307, PETRI_PLACES=281, PETRI_TRANSITIONS=231} [2024-06-21 21:21:20,511 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2024-06-21 21:21:20,511 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 231 transitions, 2307 flow [2024-06-21 21:21:20,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:20,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:20,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:20,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:21:20,511 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)] === [2024-06-21 21:21:20,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:20,512 INFO L85 PathProgramCache]: Analyzing trace with hash -886596030, now seen corresponding path program 13 times [2024-06-21 21:21:20,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:20,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016291910] [2024-06-21 21:21:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:20,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:21,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:21,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016291910] [2024-06-21 21:21:21,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016291910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:21,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:21,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:21,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339452406] [2024-06-21 21:21:21,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:21,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:21,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:21,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:21,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:21,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:21,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 231 transitions, 2307 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:21,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:21,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:21,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:21,855 INFO L124 PetriNetUnfolderBase]: 590/1096 cut-off events. [2024-06-21 21:21:21,856 INFO L125 PetriNetUnfolderBase]: For 86988/86988 co-relation queries the response was YES. [2024-06-21 21:21:21,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6931 conditions, 1096 events. 590/1096 cut-off events. For 86988/86988 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5869 event pairs, 86 based on Foata normal form. 2/1096 useless extension candidates. Maximal degree in co-relation 6806. Up to 1043 conditions per place. [2024-06-21 21:21:21,865 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 224 selfloop transitions, 21 changer transitions 0/247 dead transitions. [2024-06-21 21:21:21,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 247 transitions, 2881 flow [2024-06-21 21:21:21,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-21 21:21:21,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-21 21:21:21,866 INFO L175 Difference]: Start difference. First operand has 281 places, 231 transitions, 2307 flow. Second operand 10 states and 111 transitions. [2024-06-21 21:21:21,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 247 transitions, 2881 flow [2024-06-21 21:21:22,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 247 transitions, 2761 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 21:21:22,119 INFO L231 Difference]: Finished difference. Result has 280 places, 235 transitions, 2290 flow [2024-06-21 21:21:22,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2191, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2290, PETRI_PLACES=280, PETRI_TRANSITIONS=235} [2024-06-21 21:21:22,119 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 250 predicate places. [2024-06-21 21:21:22,119 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 235 transitions, 2290 flow [2024-06-21 21:21:22,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:22,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:22,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:22,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:21:22,120 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)] === [2024-06-21 21:21:22,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:22,120 INFO L85 PathProgramCache]: Analyzing trace with hash -886826670, now seen corresponding path program 14 times [2024-06-21 21:21:22,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:22,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115551281] [2024-06-21 21:21:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:22,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:22,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:22,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115551281] [2024-06-21 21:21:22,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115551281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:22,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:22,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:22,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310365208] [2024-06-21 21:21:22,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:22,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:22,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:22,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:22,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:22,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:22,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 235 transitions, 2290 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:22,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:22,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:22,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:23,315 INFO L124 PetriNetUnfolderBase]: 596/1106 cut-off events. [2024-06-21 21:21:23,316 INFO L125 PetriNetUnfolderBase]: For 88745/88745 co-relation queries the response was YES. [2024-06-21 21:21:23,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6939 conditions, 1106 events. 596/1106 cut-off events. For 88745/88745 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5938 event pairs, 88 based on Foata normal form. 2/1106 useless extension candidates. Maximal degree in co-relation 6813. Up to 1053 conditions per place. [2024-06-21 21:21:23,326 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 227 selfloop transitions, 21 changer transitions 0/250 dead transitions. [2024-06-21 21:21:23,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 250 transitions, 2852 flow [2024-06-21 21:21:23,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:23,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 21:21:23,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-21 21:21:23,326 INFO L175 Difference]: Start difference. First operand has 280 places, 235 transitions, 2290 flow. Second operand 10 states and 112 transitions. [2024-06-21 21:21:23,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 250 transitions, 2852 flow [2024-06-21 21:21:23,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 250 transitions, 2804 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:21:23,630 INFO L231 Difference]: Finished difference. Result has 284 places, 237 transitions, 2323 flow [2024-06-21 21:21:23,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2323, PETRI_PLACES=284, PETRI_TRANSITIONS=237} [2024-06-21 21:21:23,631 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2024-06-21 21:21:23,631 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 237 transitions, 2323 flow [2024-06-21 21:21:23,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:23,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:23,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:23,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:21:23,631 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)] === [2024-06-21 21:21:23,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:23,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2146873098, now seen corresponding path program 15 times [2024-06-21 21:21:23,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:23,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961354663] [2024-06-21 21:21:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:23,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:24,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:24,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961354663] [2024-06-21 21:21:24,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961354663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:24,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:24,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:24,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123354974] [2024-06-21 21:21:24,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:24,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:24,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:24,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:24,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:24,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:24,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 237 transitions, 2323 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:24,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:24,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:24,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:24,742 INFO L124 PetriNetUnfolderBase]: 602/1116 cut-off events. [2024-06-21 21:21:24,742 INFO L125 PetriNetUnfolderBase]: For 91150/91150 co-relation queries the response was YES. [2024-06-21 21:21:24,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7051 conditions, 1116 events. 602/1116 cut-off events. For 91150/91150 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5988 event pairs, 83 based on Foata normal form. 2/1116 useless extension candidates. Maximal degree in co-relation 6924. Up to 946 conditions per place. [2024-06-21 21:21:24,752 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 198 selfloop transitions, 53 changer transitions 0/253 dead transitions. [2024-06-21 21:21:24,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 253 transitions, 3095 flow [2024-06-21 21:21:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:24,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 21:21:24,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:21:24,755 INFO L175 Difference]: Start difference. First operand has 284 places, 237 transitions, 2323 flow. Second operand 10 states and 120 transitions. [2024-06-21 21:21:24,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 253 transitions, 3095 flow [2024-06-21 21:21:25,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 253 transitions, 3028 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:25,014 INFO L231 Difference]: Finished difference. Result has 285 places, 239 transitions, 2419 flow [2024-06-21 21:21:25,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2419, PETRI_PLACES=285, PETRI_TRANSITIONS=239} [2024-06-21 21:21:25,014 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 255 predicate places. [2024-06-21 21:21:25,014 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 239 transitions, 2419 flow [2024-06-21 21:21:25,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:25,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:25,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:25,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:21:25,015 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)] === [2024-06-21 21:21:25,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash -254843674, now seen corresponding path program 20 times [2024-06-21 21:21:25,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:25,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151310894] [2024-06-21 21:21:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:25,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:25,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:25,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151310894] [2024-06-21 21:21:25,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151310894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:25,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:25,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:25,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932732598] [2024-06-21 21:21:25,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:25,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:25,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:25,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:25,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:25,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:25,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 239 transitions, 2419 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:25,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:25,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:25,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:26,043 INFO L124 PetriNetUnfolderBase]: 606/1124 cut-off events. [2024-06-21 21:21:26,043 INFO L125 PetriNetUnfolderBase]: For 93107/93107 co-relation queries the response was YES. [2024-06-21 21:21:26,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7182 conditions, 1124 events. 606/1124 cut-off events. For 93107/93107 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6054 event pairs, 96 based on Foata normal form. 2/1124 useless extension candidates. Maximal degree in co-relation 7054. Up to 1063 conditions per place. [2024-06-21 21:21:26,053 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 217 selfloop transitions, 31 changer transitions 0/250 dead transitions. [2024-06-21 21:21:26,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 250 transitions, 2956 flow [2024-06-21 21:21:26,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 21:21:26,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:21:26,054 INFO L175 Difference]: Start difference. First operand has 285 places, 239 transitions, 2419 flow. Second operand 10 states and 110 transitions. [2024-06-21 21:21:26,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 250 transitions, 2956 flow [2024-06-21 21:21:26,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 250 transitions, 2665 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-06-21 21:21:26,292 INFO L231 Difference]: Finished difference. Result has 284 places, 240 transitions, 2215 flow [2024-06-21 21:21:26,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2128, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2215, PETRI_PLACES=284, PETRI_TRANSITIONS=240} [2024-06-21 21:21:26,293 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2024-06-21 21:21:26,293 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 240 transitions, 2215 flow [2024-06-21 21:21:26,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:26,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:26,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:26,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:21:26,294 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)] === [2024-06-21 21:21:26,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:26,294 INFO L85 PathProgramCache]: Analyzing trace with hash -601496160, now seen corresponding path program 16 times [2024-06-21 21:21:26,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:26,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662551465] [2024-06-21 21:21:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:26,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:27,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:27,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662551465] [2024-06-21 21:21:27,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662551465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:27,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:27,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:27,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25762575] [2024-06-21 21:21:27,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:27,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:27,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:27,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:27,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:27,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:27,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 240 transitions, 2215 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:27,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:27,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:27,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:27,534 INFO L124 PetriNetUnfolderBase]: 612/1134 cut-off events. [2024-06-21 21:21:27,534 INFO L125 PetriNetUnfolderBase]: For 94777/94777 co-relation queries the response was YES. [2024-06-21 21:21:27,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6874 conditions, 1134 events. 612/1134 cut-off events. For 94777/94777 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 6112 event pairs, 94 based on Foata normal form. 2/1134 useless extension candidates. Maximal degree in co-relation 6748. Up to 1082 conditions per place. [2024-06-21 21:21:27,544 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 231 selfloop transitions, 21 changer transitions 0/254 dead transitions. [2024-06-21 21:21:27,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 254 transitions, 2795 flow [2024-06-21 21:21:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:27,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 21:21:27,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:21:27,545 INFO L175 Difference]: Start difference. First operand has 284 places, 240 transitions, 2215 flow. Second operand 10 states and 110 transitions. [2024-06-21 21:21:27,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 254 transitions, 2795 flow [2024-06-21 21:21:27,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 254 transitions, 2719 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:27,876 INFO L231 Difference]: Finished difference. Result has 286 places, 242 transitions, 2234 flow [2024-06-21 21:21:27,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2234, PETRI_PLACES=286, PETRI_TRANSITIONS=242} [2024-06-21 21:21:27,876 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2024-06-21 21:21:27,876 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 242 transitions, 2234 flow [2024-06-21 21:21:27,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:27,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:27,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:27,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:21:27,877 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)] === [2024-06-21 21:21:27,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:27,877 INFO L85 PathProgramCache]: Analyzing trace with hash -591011712, now seen corresponding path program 5 times [2024-06-21 21:21:27,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:27,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82268760] [2024-06-21 21:21:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:27,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:28,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:28,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82268760] [2024-06-21 21:21:28,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82268760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:28,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:28,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:28,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881471467] [2024-06-21 21:21:28,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:28,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:28,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:28,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:28,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:28,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:28,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 242 transitions, 2234 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:28,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:28,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:28,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:29,156 INFO L124 PetriNetUnfolderBase]: 609/1129 cut-off events. [2024-06-21 21:21:29,156 INFO L125 PetriNetUnfolderBase]: For 88103/88103 co-relation queries the response was YES. [2024-06-21 21:21:29,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6642 conditions, 1129 events. 609/1129 cut-off events. For 88103/88103 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 6077 event pairs, 94 based on Foata normal form. 2/1129 useless extension candidates. Maximal degree in co-relation 6515. Up to 1090 conditions per place. [2024-06-21 21:21:29,164 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 235 selfloop transitions, 16 changer transitions 0/253 dead transitions. [2024-06-21 21:21:29,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 253 transitions, 2760 flow [2024-06-21 21:21:29,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:29,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:29,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-21 21:21:29,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-21 21:21:29,165 INFO L175 Difference]: Start difference. First operand has 286 places, 242 transitions, 2234 flow. Second operand 10 states and 105 transitions. [2024-06-21 21:21:29,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 253 transitions, 2760 flow [2024-06-21 21:21:29,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 253 transitions, 2685 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:29,458 INFO L231 Difference]: Finished difference. Result has 288 places, 242 transitions, 2195 flow [2024-06-21 21:21:29,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2195, PETRI_PLACES=288, PETRI_TRANSITIONS=242} [2024-06-21 21:21:29,459 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2024-06-21 21:21:29,459 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 242 transitions, 2195 flow [2024-06-21 21:21:29,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:29,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:29,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:29,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:21:29,459 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)] === [2024-06-21 21:21:29,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:29,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2103581790, now seen corresponding path program 21 times [2024-06-21 21:21:29,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:29,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563685543] [2024-06-21 21:21:29,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:29,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:30,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:30,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563685543] [2024-06-21 21:21:30,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563685543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:30,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:30,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:30,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768203909] [2024-06-21 21:21:30,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:30,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:30,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:30,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:30,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:30,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:30,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 242 transitions, 2195 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:30,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:30,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:30,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:30,525 INFO L124 PetriNetUnfolderBase]: 613/1137 cut-off events. [2024-06-21 21:21:30,525 INFO L125 PetriNetUnfolderBase]: For 89955/89955 co-relation queries the response was YES. [2024-06-21 21:21:30,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6655 conditions, 1137 events. 613/1137 cut-off events. For 89955/89955 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 6146 event pairs, 95 based on Foata normal form. 2/1137 useless extension candidates. Maximal degree in co-relation 6527. Up to 1045 conditions per place. [2024-06-21 21:21:30,533 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 219 selfloop transitions, 34 changer transitions 0/255 dead transitions. [2024-06-21 21:21:30,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 255 transitions, 2936 flow [2024-06-21 21:21:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 21:21:30,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-21 21:21:30,534 INFO L175 Difference]: Start difference. First operand has 288 places, 242 transitions, 2195 flow. Second operand 10 states and 112 transitions. [2024-06-21 21:21:30,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 255 transitions, 2936 flow [2024-06-21 21:21:30,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 255 transitions, 2830 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-21 21:21:30,891 INFO L231 Difference]: Finished difference. Result has 287 places, 243 transitions, 2182 flow [2024-06-21 21:21:30,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2182, PETRI_PLACES=287, PETRI_TRANSITIONS=243} [2024-06-21 21:21:30,891 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 257 predicate places. [2024-06-21 21:21:30,891 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 243 transitions, 2182 flow [2024-06-21 21:21:30,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:30,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:30,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:30,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:21:30,892 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)] === [2024-06-21 21:21:30,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:30,892 INFO L85 PathProgramCache]: Analyzing trace with hash -886833180, now seen corresponding path program 17 times [2024-06-21 21:21:30,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:30,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961381914] [2024-06-21 21:21:30,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:30,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:31,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:31,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961381914] [2024-06-21 21:21:31,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961381914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:31,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:31,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:31,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485522206] [2024-06-21 21:21:31,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:31,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:31,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:31,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:31,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:31,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:31,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 243 transitions, 2182 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:31,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:31,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:31,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:32,046 INFO L124 PetriNetUnfolderBase]: 619/1147 cut-off events. [2024-06-21 21:21:32,046 INFO L125 PetriNetUnfolderBase]: For 91872/91872 co-relation queries the response was YES. [2024-06-21 21:21:32,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6658 conditions, 1147 events. 619/1147 cut-off events. For 91872/91872 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6222 event pairs, 91 based on Foata normal form. 2/1147 useless extension candidates. Maximal degree in co-relation 6532. Up to 1077 conditions per place. [2024-06-21 21:21:32,056 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 231 selfloop transitions, 27 changer transitions 0/260 dead transitions. [2024-06-21 21:21:32,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 260 transitions, 2788 flow [2024-06-21 21:21:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:32,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 21:21:32,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 21:21:32,057 INFO L175 Difference]: Start difference. First operand has 287 places, 243 transitions, 2182 flow. Second operand 11 states and 123 transitions. [2024-06-21 21:21:32,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 260 transitions, 2788 flow [2024-06-21 21:21:32,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 260 transitions, 2641 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:32,374 INFO L231 Difference]: Finished difference. Result has 289 places, 245 transitions, 2146 flow [2024-06-21 21:21:32,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2146, PETRI_PLACES=289, PETRI_TRANSITIONS=245} [2024-06-21 21:21:32,374 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 259 predicate places. [2024-06-21 21:21:32,374 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 245 transitions, 2146 flow [2024-06-21 21:21:32,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:32,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:32,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:32,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:21:32,375 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)] === [2024-06-21 21:21:32,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:32,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1499073472, now seen corresponding path program 18 times [2024-06-21 21:21:32,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:32,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514263622] [2024-06-21 21:21:32,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:32,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:33,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:33,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514263622] [2024-06-21 21:21:33,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514263622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:33,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:33,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:33,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515738855] [2024-06-21 21:21:33,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:33,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:33,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:33,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:33,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:33,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:33,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 245 transitions, 2146 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:33,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:33,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:33,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:33,566 INFO L124 PetriNetUnfolderBase]: 631/1167 cut-off events. [2024-06-21 21:21:33,566 INFO L125 PetriNetUnfolderBase]: For 93802/93802 co-relation queries the response was YES. [2024-06-21 21:21:33,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6628 conditions, 1167 events. 631/1167 cut-off events. For 93802/93802 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 6342 event pairs, 91 based on Foata normal form. 2/1167 useless extension candidates. Maximal degree in co-relation 6502. Up to 1079 conditions per place. [2024-06-21 21:21:33,576 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 231 selfloop transitions, 30 changer transitions 0/263 dead transitions. [2024-06-21 21:21:33,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 263 transitions, 2758 flow [2024-06-21 21:21:33,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:33,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 21:21:33,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-21 21:21:33,577 INFO L175 Difference]: Start difference. First operand has 289 places, 245 transitions, 2146 flow. Second operand 10 states and 118 transitions. [2024-06-21 21:21:33,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 263 transitions, 2758 flow [2024-06-21 21:21:33,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 263 transitions, 2667 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:33,838 INFO L231 Difference]: Finished difference. Result has 290 places, 249 transitions, 2174 flow [2024-06-21 21:21:33,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2174, PETRI_PLACES=290, PETRI_TRANSITIONS=249} [2024-06-21 21:21:33,839 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2024-06-21 21:21:33,839 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 249 transitions, 2174 flow [2024-06-21 21:21:33,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:33,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:33,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:33,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 21:21:33,839 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)] === [2024-06-21 21:21:33,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:33,839 INFO L85 PathProgramCache]: Analyzing trace with hash -886833366, now seen corresponding path program 22 times [2024-06-21 21:21:33,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:33,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283192933] [2024-06-21 21:21:33,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:33,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:34,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:34,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283192933] [2024-06-21 21:21:34,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283192933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:34,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:34,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:34,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697750543] [2024-06-21 21:21:34,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:34,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:34,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:34,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:34,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:34,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:34,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 249 transitions, 2174 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:34,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:34,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:34,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:34,942 INFO L124 PetriNetUnfolderBase]: 655/1219 cut-off events. [2024-06-21 21:21:34,942 INFO L125 PetriNetUnfolderBase]: For 151502/151502 co-relation queries the response was YES. [2024-06-21 21:21:34,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6802 conditions, 1219 events. 655/1219 cut-off events. For 151502/151502 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 6665 event pairs, 99 based on Foata normal form. 14/1231 useless extension candidates. Maximal degree in co-relation 6675. Up to 1089 conditions per place. [2024-06-21 21:21:34,953 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 233 selfloop transitions, 16 changer transitions 17/268 dead transitions. [2024-06-21 21:21:34,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 268 transitions, 2797 flow [2024-06-21 21:21:34,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 21:21:34,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-21 21:21:34,954 INFO L175 Difference]: Start difference. First operand has 290 places, 249 transitions, 2174 flow. Second operand 10 states and 117 transitions. [2024-06-21 21:21:34,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 268 transitions, 2797 flow [2024-06-21 21:21:35,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 268 transitions, 2718 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 21:21:35,211 INFO L231 Difference]: Finished difference. Result has 293 places, 240 transitions, 2075 flow [2024-06-21 21:21:35,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2075, PETRI_PLACES=293, PETRI_TRANSITIONS=240} [2024-06-21 21:21:35,212 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 263 predicate places. [2024-06-21 21:21:35,212 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 240 transitions, 2075 flow [2024-06-21 21:21:35,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:35,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:35,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:35,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 21:21:35,212 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)] === [2024-06-21 21:21:35,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash -248414398, now seen corresponding path program 19 times [2024-06-21 21:21:35,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:35,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733325661] [2024-06-21 21:21:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:35,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:35,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:35,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733325661] [2024-06-21 21:21:35,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733325661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:35,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:35,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:35,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365924664] [2024-06-21 21:21:35,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:35,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:35,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:35,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:35,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:35,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:35,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 240 transitions, 2075 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:35,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:35,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:35,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:36,355 INFO L124 PetriNetUnfolderBase]: 601/1123 cut-off events. [2024-06-21 21:21:36,356 INFO L125 PetriNetUnfolderBase]: For 87686/87686 co-relation queries the response was YES. [2024-06-21 21:21:36,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6162 conditions, 1123 events. 601/1123 cut-off events. For 87686/87686 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 6104 event pairs, 87 based on Foata normal form. 2/1123 useless extension candidates. Maximal degree in co-relation 6034. Up to 1029 conditions per place. [2024-06-21 21:21:36,365 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 223 selfloop transitions, 32 changer transitions 0/257 dead transitions. [2024-06-21 21:21:36,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 257 transitions, 2829 flow [2024-06-21 21:21:36,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:36,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 21:21:36,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 21:21:36,366 INFO L175 Difference]: Start difference. First operand has 293 places, 240 transitions, 2075 flow. Second operand 11 states and 130 transitions. [2024-06-21 21:21:36,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 257 transitions, 2829 flow [2024-06-21 21:21:36,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 257 transitions, 2767 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 21:21:36,634 INFO L231 Difference]: Finished difference. Result has 290 places, 240 transitions, 2086 flow [2024-06-21 21:21:36,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2086, PETRI_PLACES=290, PETRI_TRANSITIONS=240} [2024-06-21 21:21:36,635 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2024-06-21 21:21:36,635 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 240 transitions, 2086 flow [2024-06-21 21:21:36,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:36,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:36,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:36,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 21:21:36,635 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)] === [2024-06-21 21:21:36,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:36,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2141665294, now seen corresponding path program 23 times [2024-06-21 21:21:36,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:36,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550823698] [2024-06-21 21:21:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:36,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:37,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:37,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550823698] [2024-06-21 21:21:37,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550823698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:37,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:37,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:37,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588962571] [2024-06-21 21:21:37,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:37,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:37,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:37,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:37,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 240 transitions, 2086 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:37,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:37,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:37,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:37,824 INFO L124 PetriNetUnfolderBase]: 598/1118 cut-off events. [2024-06-21 21:21:37,824 INFO L125 PetriNetUnfolderBase]: For 76385/76385 co-relation queries the response was YES. [2024-06-21 21:21:37,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5926 conditions, 1118 events. 598/1118 cut-off events. For 76385/76385 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 6060 event pairs, 93 based on Foata normal form. 2/1118 useless extension candidates. Maximal degree in co-relation 5799. Up to 1069 conditions per place. [2024-06-21 21:21:37,833 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 226 selfloop transitions, 22 changer transitions 0/250 dead transitions. [2024-06-21 21:21:37,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 250 transitions, 2604 flow [2024-06-21 21:21:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:37,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:37,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 21:21:37,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:21:37,834 INFO L175 Difference]: Start difference. First operand has 290 places, 240 transitions, 2086 flow. Second operand 10 states and 110 transitions. [2024-06-21 21:21:37,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 250 transitions, 2604 flow [2024-06-21 21:21:38,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 250 transitions, 2408 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-06-21 21:21:38,048 INFO L231 Difference]: Finished difference. Result has 289 places, 240 transitions, 1938 flow [2024-06-21 21:21:38,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1890, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1938, PETRI_PLACES=289, PETRI_TRANSITIONS=240} [2024-06-21 21:21:38,048 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 259 predicate places. [2024-06-21 21:21:38,048 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 240 transitions, 1938 flow [2024-06-21 21:21:38,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:38,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:38,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:38,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 21:21:38,048 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)] === [2024-06-21 21:21:38,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:38,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1499304112, now seen corresponding path program 20 times [2024-06-21 21:21:38,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:38,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134413338] [2024-06-21 21:21:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:38,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:38,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:38,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134413338] [2024-06-21 21:21:38,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134413338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:38,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:38,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:38,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072181510] [2024-06-21 21:21:38,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:38,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:38,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:38,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:38,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:39,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:39,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 240 transitions, 1938 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:39,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:39,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:39,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:39,418 INFO L124 PetriNetUnfolderBase]: 594/1112 cut-off events. [2024-06-21 21:21:39,418 INFO L125 PetriNetUnfolderBase]: For 67668/67668 co-relation queries the response was YES. [2024-06-21 21:21:39,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5461 conditions, 1112 events. 594/1112 cut-off events. For 67668/67668 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 6054 event pairs, 86 based on Foata normal form. 2/1112 useless extension candidates. Maximal degree in co-relation 5334. Up to 1038 conditions per place. [2024-06-21 21:21:39,426 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 225 selfloop transitions, 26 changer transitions 0/253 dead transitions. [2024-06-21 21:21:39,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 253 transitions, 2476 flow [2024-06-21 21:21:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:39,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:39,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 21:21:39,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 21:21:39,426 INFO L175 Difference]: Start difference. First operand has 289 places, 240 transitions, 1938 flow. Second operand 10 states and 116 transitions. [2024-06-21 21:21:39,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 253 transitions, 2476 flow [2024-06-21 21:21:39,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 253 transitions, 2404 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:39,580 INFO L231 Difference]: Finished difference. Result has 290 places, 240 transitions, 1923 flow [2024-06-21 21:21:39,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1923, PETRI_PLACES=290, PETRI_TRANSITIONS=240} [2024-06-21 21:21:39,580 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2024-06-21 21:21:39,581 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 240 transitions, 1923 flow [2024-06-21 21:21:39,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:39,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:39,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:39,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 21:21:39,581 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)] === [2024-06-21 21:21:39,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:39,581 INFO L85 PathProgramCache]: Analyzing trace with hash -16467686, now seen corresponding path program 1 times [2024-06-21 21:21:39,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:39,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119658343] [2024-06-21 21:21:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:39,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:40,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:40,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119658343] [2024-06-21 21:21:40,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119658343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:40,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:40,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:40,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951532942] [2024-06-21 21:21:40,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:40,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:40,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:40,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:40,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:40,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:40,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 240 transitions, 1923 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:40,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:40,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:40,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:40,915 INFO L124 PetriNetUnfolderBase]: 642/1212 cut-off events. [2024-06-21 21:21:40,915 INFO L125 PetriNetUnfolderBase]: For 153296/153296 co-relation queries the response was YES. [2024-06-21 21:21:40,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6932 conditions, 1212 events. 642/1212 cut-off events. For 153296/153296 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6678 event pairs, 96 based on Foata normal form. 8/1218 useless extension candidates. Maximal degree in co-relation 6804. Up to 596 conditions per place. [2024-06-21 21:21:40,927 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 153 selfloop transitions, 98 changer transitions 18/271 dead transitions. [2024-06-21 21:21:40,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 271 transitions, 2775 flow [2024-06-21 21:21:40,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:40,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-21 21:21:40,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2024-06-21 21:21:40,928 INFO L175 Difference]: Start difference. First operand has 290 places, 240 transitions, 1923 flow. Second operand 11 states and 142 transitions. [2024-06-21 21:21:40,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 271 transitions, 2775 flow [2024-06-21 21:21:41,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 271 transitions, 2706 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:41,363 INFO L231 Difference]: Finished difference. Result has 292 places, 236 transitions, 2032 flow [2024-06-21 21:21:41,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1854, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2032, PETRI_PLACES=292, PETRI_TRANSITIONS=236} [2024-06-21 21:21:41,364 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 262 predicate places. [2024-06-21 21:21:41,364 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 236 transitions, 2032 flow [2024-06-21 21:21:41,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:41,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:41,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:41,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 21:21:41,364 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)] === [2024-06-21 21:21:41,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1264248402, now seen corresponding path program 2 times [2024-06-21 21:21:41,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:41,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629082955] [2024-06-21 21:21:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:41,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:42,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:42,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629082955] [2024-06-21 21:21:42,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629082955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:42,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:42,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:42,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270659699] [2024-06-21 21:21:42,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:42,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:42,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:42,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:42,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:42,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:42,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 236 transitions, 2032 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:42,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:42,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:42,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:42,569 INFO L124 PetriNetUnfolderBase]: 630/1192 cut-off events. [2024-06-21 21:21:42,569 INFO L125 PetriNetUnfolderBase]: For 166491/166491 co-relation queries the response was YES. [2024-06-21 21:21:42,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7078 conditions, 1192 events. 630/1192 cut-off events. For 166491/166491 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 6542 event pairs, 100 based on Foata normal form. 10/1200 useless extension candidates. Maximal degree in co-relation 6949. Up to 701 conditions per place. [2024-06-21 21:21:42,580 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 136 selfloop transitions, 107 changer transitions 14/259 dead transitions. [2024-06-21 21:21:42,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 259 transitions, 2632 flow [2024-06-21 21:21:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:42,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 21:21:42,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 21:21:42,581 INFO L175 Difference]: Start difference. First operand has 292 places, 236 transitions, 2032 flow. Second operand 11 states and 139 transitions. [2024-06-21 21:21:42,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 259 transitions, 2632 flow [2024-06-21 21:21:42,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 259 transitions, 2493 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:42,983 INFO L231 Difference]: Finished difference. Result has 287 places, 233 transitions, 2090 flow [2024-06-21 21:21:42,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1893, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2090, PETRI_PLACES=287, PETRI_TRANSITIONS=233} [2024-06-21 21:21:42,984 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 257 predicate places. [2024-06-21 21:21:42,984 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 233 transitions, 2090 flow [2024-06-21 21:21:42,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:42,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:42,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:42,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 21:21:42,984 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)] === [2024-06-21 21:21:42,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:42,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1788117334, now seen corresponding path program 3 times [2024-06-21 21:21:42,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:42,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913191368] [2024-06-21 21:21:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:42,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:43,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:43,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913191368] [2024-06-21 21:21:43,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913191368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:43,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:43,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:43,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871006598] [2024-06-21 21:21:43,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:43,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:43,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:43,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:43,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:43,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:43,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 233 transitions, 2090 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:43,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:43,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:43,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:44,077 INFO L124 PetriNetUnfolderBase]: 618/1172 cut-off events. [2024-06-21 21:21:44,077 INFO L125 PetriNetUnfolderBase]: For 147329/147329 co-relation queries the response was YES. [2024-06-21 21:21:44,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7108 conditions, 1172 events. 618/1172 cut-off events. For 147329/147329 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 6417 event pairs, 96 based on Foata normal form. 8/1178 useless extension candidates. Maximal degree in co-relation 6982. Up to 691 conditions per place. [2024-06-21 21:21:44,087 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 134 selfloop transitions, 105 changer transitions 14/255 dead transitions. [2024-06-21 21:21:44,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 255 transitions, 2668 flow [2024-06-21 21:21:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 21:21:44,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 21:21:44,088 INFO L175 Difference]: Start difference. First operand has 287 places, 233 transitions, 2090 flow. Second operand 11 states and 136 transitions. [2024-06-21 21:21:44,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 255 transitions, 2668 flow [2024-06-21 21:21:44,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 255 transitions, 2450 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:21:44,470 INFO L231 Difference]: Finished difference. Result has 285 places, 230 transitions, 2066 flow [2024-06-21 21:21:44,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2066, PETRI_PLACES=285, PETRI_TRANSITIONS=230} [2024-06-21 21:21:44,470 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 255 predicate places. [2024-06-21 21:21:44,470 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 230 transitions, 2066 flow [2024-06-21 21:21:44,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:44,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:44,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:44,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 21:21:44,470 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)] === [2024-06-21 21:21:44,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:44,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1787973184, now seen corresponding path program 4 times [2024-06-21 21:21:44,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:44,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688065347] [2024-06-21 21:21:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:44,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:45,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:45,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688065347] [2024-06-21 21:21:45,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688065347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:45,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:45,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:45,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537456156] [2024-06-21 21:21:45,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:45,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:45,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:45,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:45,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:45,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:45,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 230 transitions, 2066 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:45,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:45,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:45,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:45,873 INFO L124 PetriNetUnfolderBase]: 611/1159 cut-off events. [2024-06-21 21:21:45,873 INFO L125 PetriNetUnfolderBase]: For 144288/144288 co-relation queries the response was YES. [2024-06-21 21:21:45,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7035 conditions, 1159 events. 611/1159 cut-off events. For 144288/144288 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6333 event pairs, 92 based on Foata normal form. 8/1165 useless extension candidates. Maximal degree in co-relation 6910. Up to 673 conditions per place. [2024-06-21 21:21:45,881 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 131 selfloop transitions, 104 changer transitions 17/254 dead transitions. [2024-06-21 21:21:45,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 254 transitions, 2646 flow [2024-06-21 21:21:45,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:21:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:21:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-21 21:21:45,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:21:45,882 INFO L175 Difference]: Start difference. First operand has 285 places, 230 transitions, 2066 flow. Second operand 12 states and 144 transitions. [2024-06-21 21:21:45,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 254 transitions, 2646 flow [2024-06-21 21:21:46,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 254 transitions, 2430 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:21:46,277 INFO L231 Difference]: Finished difference. Result has 282 places, 226 transitions, 2035 flow [2024-06-21 21:21:46,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1850, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2035, PETRI_PLACES=282, PETRI_TRANSITIONS=226} [2024-06-21 21:21:46,277 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 252 predicate places. [2024-06-21 21:21:46,277 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 226 transitions, 2035 flow [2024-06-21 21:21:46,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:46,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:46,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:46,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 21:21:46,278 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)] === [2024-06-21 21:21:46,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:46,278 INFO L85 PathProgramCache]: Analyzing trace with hash -957557456, now seen corresponding path program 5 times [2024-06-21 21:21:46,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:46,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403825184] [2024-06-21 21:21:46,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:46,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:46,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:46,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403825184] [2024-06-21 21:21:46,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403825184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:46,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:46,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:46,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097761320] [2024-06-21 21:21:46,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:46,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:46,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:46,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:46,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:47,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:47,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 226 transitions, 2035 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:47,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:47,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:47,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:47,410 INFO L124 PetriNetUnfolderBase]: 604/1146 cut-off events. [2024-06-21 21:21:47,410 INFO L125 PetriNetUnfolderBase]: For 138310/138310 co-relation queries the response was YES. [2024-06-21 21:21:47,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6935 conditions, 1146 events. 604/1146 cut-off events. For 138310/138310 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6230 event pairs, 86 based on Foata normal form. 8/1152 useless extension candidates. Maximal degree in co-relation 6812. Up to 655 conditions per place. [2024-06-21 21:21:47,419 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 125 selfloop transitions, 100 changer transitions 24/251 dead transitions. [2024-06-21 21:21:47,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 251 transitions, 2613 flow [2024-06-21 21:21:47,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 21:21:47,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 21:21:47,420 INFO L175 Difference]: Start difference. First operand has 282 places, 226 transitions, 2035 flow. Second operand 11 states and 136 transitions. [2024-06-21 21:21:47,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 251 transitions, 2613 flow [2024-06-21 21:21:47,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 251 transitions, 2399 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:21:47,651 INFO L231 Difference]: Finished difference. Result has 277 places, 220 transitions, 1980 flow [2024-06-21 21:21:47,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1980, PETRI_PLACES=277, PETRI_TRANSITIONS=220} [2024-06-21 21:21:47,652 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 247 predicate places. [2024-06-21 21:21:47,652 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 220 transitions, 1980 flow [2024-06-21 21:21:47,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:47,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:47,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:47,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 21:21:47,653 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)] === [2024-06-21 21:21:47,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:47,653 INFO L85 PathProgramCache]: Analyzing trace with hash 896508510, now seen corresponding path program 6 times [2024-06-21 21:21:47,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:47,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173948818] [2024-06-21 21:21:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:47,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:48,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:48,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173948818] [2024-06-21 21:21:48,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173948818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:48,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:48,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:48,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299741819] [2024-06-21 21:21:48,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:48,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:48,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:48,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:48,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:48,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:48,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 220 transitions, 1980 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:48,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:48,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:48,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:48,904 INFO L124 PetriNetUnfolderBase]: 587/1113 cut-off events. [2024-06-21 21:21:48,904 INFO L125 PetriNetUnfolderBase]: For 140906/140906 co-relation queries the response was YES. [2024-06-21 21:21:48,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6774 conditions, 1113 events. 587/1113 cut-off events. For 140906/140906 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 6010 event pairs, 88 based on Foata normal form. 10/1121 useless extension candidates. Maximal degree in co-relation 6652. Up to 836 conditions per place. [2024-06-21 21:21:48,913 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 171 selfloop transitions, 57 changer transitions 11/241 dead transitions. [2024-06-21 21:21:48,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 241 transitions, 2538 flow [2024-06-21 21:21:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:21:48,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:21:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 21:21:48,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 21:21:48,914 INFO L175 Difference]: Start difference. First operand has 277 places, 220 transitions, 1980 flow. Second operand 12 states and 141 transitions. [2024-06-21 21:21:48,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 241 transitions, 2538 flow [2024-06-21 21:21:49,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 241 transitions, 2306 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 21:21:49,141 INFO L231 Difference]: Finished difference. Result has 269 places, 217 transitions, 1843 flow [2024-06-21 21:21:49,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1843, PETRI_PLACES=269, PETRI_TRANSITIONS=217} [2024-06-21 21:21:49,141 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 239 predicate places. [2024-06-21 21:21:49,142 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 217 transitions, 1843 flow [2024-06-21 21:21:49,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:49,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:49,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:49,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 21:21:49,142 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)] === [2024-06-21 21:21:49,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:49,142 INFO L85 PathProgramCache]: Analyzing trace with hash 896502930, now seen corresponding path program 7 times [2024-06-21 21:21:49,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:49,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940970431] [2024-06-21 21:21:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:49,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:49,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:49,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940970431] [2024-06-21 21:21:49,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940970431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:49,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:49,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:49,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428800203] [2024-06-21 21:21:49,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:49,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:49,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:49,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:49,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:50,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:50,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 217 transitions, 1843 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:50,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:50,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:50,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:50,459 INFO L124 PetriNetUnfolderBase]: 563/1069 cut-off events. [2024-06-21 21:21:50,459 INFO L125 PetriNetUnfolderBase]: For 129293/129293 co-relation queries the response was YES. [2024-06-21 21:21:50,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6437 conditions, 1069 events. 563/1069 cut-off events. For 129293/129293 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 5733 event pairs, 80 based on Foata normal form. 8/1075 useless extension candidates. Maximal degree in co-relation 6320. Up to 802 conditions per place. [2024-06-21 21:21:50,467 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 170 selfloop transitions, 52 changer transitions 12/236 dead transitions. [2024-06-21 21:21:50,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 236 transitions, 2371 flow [2024-06-21 21:21:50,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 21:21:50,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 21:21:50,468 INFO L175 Difference]: Start difference. First operand has 269 places, 217 transitions, 1843 flow. Second operand 11 states and 131 transitions. [2024-06-21 21:21:50,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 236 transitions, 2371 flow [2024-06-21 21:21:50,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 236 transitions, 2254 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:21:50,731 INFO L231 Difference]: Finished difference. Result has 268 places, 213 transitions, 1789 flow [2024-06-21 21:21:50,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1726, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1789, PETRI_PLACES=268, PETRI_TRANSITIONS=213} [2024-06-21 21:21:50,731 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-06-21 21:21:50,731 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 213 transitions, 1789 flow [2024-06-21 21:21:50,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:50,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:50,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:50,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 21:21:50,731 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)] === [2024-06-21 21:21:50,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:50,732 INFO L85 PathProgramCache]: Analyzing trace with hash -425160904, now seen corresponding path program 8 times [2024-06-21 21:21:50,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:50,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255321064] [2024-06-21 21:21:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:50,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:51,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:51,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255321064] [2024-06-21 21:21:51,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255321064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:51,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:51,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:51,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946361376] [2024-06-21 21:21:51,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:51,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:51,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:51,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:51,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:51,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:51,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 213 transitions, 1789 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:51,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:51,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:51,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:52,202 INFO L124 PetriNetUnfolderBase]: 583/1113 cut-off events. [2024-06-21 21:21:52,202 INFO L125 PetriNetUnfolderBase]: For 172942/172942 co-relation queries the response was YES. [2024-06-21 21:21:52,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7477 conditions, 1113 events. 583/1113 cut-off events. For 172942/172942 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6022 event pairs, 85 based on Foata normal form. 8/1119 useless extension candidates. Maximal degree in co-relation 7360. Up to 745 conditions per place. [2024-06-21 21:21:52,211 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 167 selfloop transitions, 59 changer transitions 11/239 dead transitions. [2024-06-21 21:21:52,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 239 transitions, 2545 flow [2024-06-21 21:21:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:21:52,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:21:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-21 21:21:52,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40053763440860213 [2024-06-21 21:21:52,212 INFO L175 Difference]: Start difference. First operand has 268 places, 213 transitions, 1789 flow. Second operand 12 states and 149 transitions. [2024-06-21 21:21:52,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 239 transitions, 2545 flow [2024-06-21 21:21:52,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 239 transitions, 2377 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-21 21:21:52,565 INFO L231 Difference]: Finished difference. Result has 264 places, 210 transitions, 1720 flow [2024-06-21 21:21:52,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1720, PETRI_PLACES=264, PETRI_TRANSITIONS=210} [2024-06-21 21:21:52,565 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 234 predicate places. [2024-06-21 21:21:52,566 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 210 transitions, 1720 flow [2024-06-21 21:21:52,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:52,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:52,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:52,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 21:21:52,566 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)] === [2024-06-21 21:21:52,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:52,566 INFO L85 PathProgramCache]: Analyzing trace with hash -661865446, now seen corresponding path program 9 times [2024-06-21 21:21:52,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:52,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440590283] [2024-06-21 21:21:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:52,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:53,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:53,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440590283] [2024-06-21 21:21:53,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440590283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:53,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:53,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:53,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025773102] [2024-06-21 21:21:53,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:53,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:53,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:53,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:53,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:53,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:53,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 210 transitions, 1720 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:53,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:53,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:53,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:53,758 INFO L124 PetriNetUnfolderBase]: 570/1090 cut-off events. [2024-06-21 21:21:53,758 INFO L125 PetriNetUnfolderBase]: For 172810/172810 co-relation queries the response was YES. [2024-06-21 21:21:53,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7086 conditions, 1090 events. 570/1090 cut-off events. For 172810/172810 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5865 event pairs, 96 based on Foata normal form. 10/1098 useless extension candidates. Maximal degree in co-relation 6971. Up to 801 conditions per place. [2024-06-21 21:21:53,766 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 158 selfloop transitions, 57 changer transitions 12/229 dead transitions. [2024-06-21 21:21:53,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 229 transitions, 2244 flow [2024-06-21 21:21:53,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:53,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:53,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 21:21:53,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 21:21:53,767 INFO L175 Difference]: Start difference. First operand has 264 places, 210 transitions, 1720 flow. Second operand 11 states and 133 transitions. [2024-06-21 21:21:53,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 229 transitions, 2244 flow [2024-06-21 21:21:54,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 229 transitions, 2123 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 21:21:54,076 INFO L231 Difference]: Finished difference. Result has 260 places, 207 transitions, 1695 flow [2024-06-21 21:21:54,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1695, PETRI_PLACES=260, PETRI_TRANSITIONS=207} [2024-06-21 21:21:54,076 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 230 predicate places. [2024-06-21 21:21:54,076 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 207 transitions, 1695 flow [2024-06-21 21:21:54,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:54,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:54,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:54,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 21:21:54,077 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)] === [2024-06-21 21:21:54,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:54,077 INFO L85 PathProgramCache]: Analyzing trace with hash -661871026, now seen corresponding path program 10 times [2024-06-21 21:21:54,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:54,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262882909] [2024-06-21 21:21:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:54,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:54,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:54,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262882909] [2024-06-21 21:21:54,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262882909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:54,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:54,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:54,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919011358] [2024-06-21 21:21:54,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:54,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:54,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:54,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:54,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:54,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:54,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 207 transitions, 1695 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:54,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:54,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:54,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:55,419 INFO L124 PetriNetUnfolderBase]: 536/1024 cut-off events. [2024-06-21 21:21:55,419 INFO L125 PetriNetUnfolderBase]: For 132010/132010 co-relation queries the response was YES. [2024-06-21 21:21:55,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6130 conditions, 1024 events. 536/1024 cut-off events. For 132010/132010 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5447 event pairs, 78 based on Foata normal form. 8/1030 useless extension candidates. Maximal degree in co-relation 6017. Up to 754 conditions per place. [2024-06-21 21:21:55,428 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 161 selfloop transitions, 50 changer transitions 14/227 dead transitions. [2024-06-21 21:21:55,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 227 transitions, 2207 flow [2024-06-21 21:21:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:21:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:21:55,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-21 21:21:55,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:21:55,428 INFO L175 Difference]: Start difference. First operand has 260 places, 207 transitions, 1695 flow. Second operand 12 states and 138 transitions. [2024-06-21 21:21:55,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 227 transitions, 2207 flow [2024-06-21 21:21:55,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 227 transitions, 2089 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:21:55,675 INFO L231 Difference]: Finished difference. Result has 259 places, 202 transitions, 1637 flow [2024-06-21 21:21:55,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1637, PETRI_PLACES=259, PETRI_TRANSITIONS=202} [2024-06-21 21:21:55,676 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 229 predicate places. [2024-06-21 21:21:55,676 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 202 transitions, 1637 flow [2024-06-21 21:21:55,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:55,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:55,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:55,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 21:21:55,676 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)] === [2024-06-21 21:21:55,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash -804118246, now seen corresponding path program 11 times [2024-06-21 21:21:55,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:55,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274763051] [2024-06-21 21:21:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:55,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:56,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:56,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274763051] [2024-06-21 21:21:56,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274763051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:56,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:56,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:56,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056174706] [2024-06-21 21:21:56,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:56,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:56,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:56,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:56,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:56,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:56,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 202 transitions, 1637 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:56,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:56,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:56,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:57,013 INFO L124 PetriNetUnfolderBase]: 555/1065 cut-off events. [2024-06-21 21:21:57,013 INFO L125 PetriNetUnfolderBase]: For 169149/169149 co-relation queries the response was YES. [2024-06-21 21:21:57,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7105 conditions, 1065 events. 555/1065 cut-off events. For 169149/169149 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5705 event pairs, 93 based on Foata normal form. 8/1071 useless extension candidates. Maximal degree in co-relation 6993. Up to 677 conditions per place. [2024-06-21 21:21:57,021 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 162 selfloop transitions, 50 changer transitions 14/228 dead transitions. [2024-06-21 21:21:57,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 228 transitions, 2367 flow [2024-06-21 21:21:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:57,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-21 21:21:57,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2024-06-21 21:21:57,022 INFO L175 Difference]: Start difference. First operand has 259 places, 202 transitions, 1637 flow. Second operand 11 states and 142 transitions. [2024-06-21 21:21:57,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 228 transitions, 2367 flow [2024-06-21 21:21:57,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 228 transitions, 2261 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:21:57,341 INFO L231 Difference]: Finished difference. Result has 253 places, 198 transitions, 1613 flow [2024-06-21 21:21:57,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1613, PETRI_PLACES=253, PETRI_TRANSITIONS=198} [2024-06-21 21:21:57,341 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 223 predicate places. [2024-06-21 21:21:57,341 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 198 transitions, 1613 flow [2024-06-21 21:21:57,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:57,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:57,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:57,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 21:21:57,342 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)] === [2024-06-21 21:21:57,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:57,342 INFO L85 PathProgramCache]: Analyzing trace with hash -800543326, now seen corresponding path program 12 times [2024-06-21 21:21:57,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:57,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715277337] [2024-06-21 21:21:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:57,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:58,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:58,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715277337] [2024-06-21 21:21:58,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715277337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:58,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:58,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:58,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720346269] [2024-06-21 21:21:58,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:58,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:58,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:58,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:58,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:58,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:58,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 198 transitions, 1613 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:58,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:58,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:58,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:58,617 INFO L124 PetriNetUnfolderBase]: 541/1039 cut-off events. [2024-06-21 21:21:58,617 INFO L125 PetriNetUnfolderBase]: For 169003/169003 co-relation queries the response was YES. [2024-06-21 21:21:58,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7018 conditions, 1039 events. 541/1039 cut-off events. For 169003/169003 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5513 event pairs, 81 based on Foata normal form. 8/1045 useless extension candidates. Maximal degree in co-relation 6907. Up to 668 conditions per place. [2024-06-21 21:21:58,625 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 155 selfloop transitions, 55 changer transitions 11/223 dead transitions. [2024-06-21 21:21:58,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 223 transitions, 2331 flow [2024-06-21 21:21:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:58,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:58,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 21:21:58,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41055718475073316 [2024-06-21 21:21:58,626 INFO L175 Difference]: Start difference. First operand has 253 places, 198 transitions, 1613 flow. Second operand 11 states and 140 transitions. [2024-06-21 21:21:58,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 223 transitions, 2331 flow [2024-06-21 21:21:58,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 223 transitions, 2215 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-21 21:21:58,909 INFO L231 Difference]: Finished difference. Result has 247 places, 195 transitions, 1600 flow [2024-06-21 21:21:58,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1600, PETRI_PLACES=247, PETRI_TRANSITIONS=195} [2024-06-21 21:21:58,909 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2024-06-21 21:21:58,909 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 195 transitions, 1600 flow [2024-06-21 21:21:58,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:58,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:58,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:58,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 21:21:58,910 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)] === [2024-06-21 21:21:58,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:58,910 INFO L85 PathProgramCache]: Analyzing trace with hash -800393596, now seen corresponding path program 13 times [2024-06-21 21:21:58,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:58,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113169439] [2024-06-21 21:21:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:58,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:59,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:59,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113169439] [2024-06-21 21:21:59,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113169439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:59,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:59,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:59,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684698419] [2024-06-21 21:21:59,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:59,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:59,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:59,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:59,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:21:59,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 195 transitions, 1600 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:59,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:59,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:21:59,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:00,200 INFO L124 PetriNetUnfolderBase]: 528/1016 cut-off events. [2024-06-21 21:22:00,200 INFO L125 PetriNetUnfolderBase]: For 157938/157938 co-relation queries the response was YES. [2024-06-21 21:22:00,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6675 conditions, 1016 events. 528/1016 cut-off events. For 157938/157938 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5367 event pairs, 90 based on Foata normal form. 10/1024 useless extension candidates. Maximal degree in co-relation 6567. Up to 724 conditions per place. [2024-06-21 21:22:00,208 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 146 selfloop transitions, 54 changer transitions 12/214 dead transitions. [2024-06-21 21:22:00,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 214 transitions, 2094 flow [2024-06-21 21:22:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 21:22:00,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:22:00,208 INFO L175 Difference]: Start difference. First operand has 247 places, 195 transitions, 1600 flow. Second operand 11 states and 132 transitions. [2024-06-21 21:22:00,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 214 transitions, 2094 flow [2024-06-21 21:22:00,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 214 transitions, 1981 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:22:00,469 INFO L231 Difference]: Finished difference. Result has 244 places, 192 transitions, 1577 flow [2024-06-21 21:22:00,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1577, PETRI_PLACES=244, PETRI_TRANSITIONS=192} [2024-06-21 21:22:00,469 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 214 predicate places. [2024-06-21 21:22:00,469 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 192 transitions, 1577 flow [2024-06-21 21:22:00,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:00,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:00,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:00,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 21:22:00,469 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)] === [2024-06-21 21:22:00,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:00,470 INFO L85 PathProgramCache]: Analyzing trace with hash -800399176, now seen corresponding path program 14 times [2024-06-21 21:22:00,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:00,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177789208] [2024-06-21 21:22:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:00,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:01,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:01,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177789208] [2024-06-21 21:22:01,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177789208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:01,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:01,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:01,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100547011] [2024-06-21 21:22:01,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:01,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:01,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:01,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:01,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:01,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:01,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 192 transitions, 1577 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:01,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:01,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:01,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:02,123 INFO L124 PetriNetUnfolderBase]: 527/1025 cut-off events. [2024-06-21 21:22:02,123 INFO L125 PetriNetUnfolderBase]: For 143654/143654 co-relation queries the response was YES. [2024-06-21 21:22:02,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6619 conditions, 1025 events. 527/1025 cut-off events. For 143654/143654 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5491 event pairs, 119 based on Foata normal form. 8/1031 useless extension candidates. Maximal degree in co-relation 6513. Up to 821 conditions per place. [2024-06-21 21:22:02,130 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 167 selfloop transitions, 34 changer transitions 16/219 dead transitions. [2024-06-21 21:22:02,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 219 transitions, 2116 flow [2024-06-21 21:22:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 21:22:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 21:22:02,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 153 transitions. [2024-06-21 21:22:02,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35253456221198154 [2024-06-21 21:22:02,131 INFO L175 Difference]: Start difference. First operand has 244 places, 192 transitions, 1577 flow. Second operand 14 states and 153 transitions. [2024-06-21 21:22:02,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 219 transitions, 2116 flow [2024-06-21 21:22:02,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 219 transitions, 1998 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:22:02,386 INFO L231 Difference]: Finished difference. Result has 249 places, 191 transitions, 1537 flow [2024-06-21 21:22:02,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1537, PETRI_PLACES=249, PETRI_TRANSITIONS=191} [2024-06-21 21:22:02,386 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-21 21:22:02,386 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 191 transitions, 1537 flow [2024-06-21 21:22:02,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:02,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:02,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:02,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 21:22:02,386 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)] === [2024-06-21 21:22:02,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:02,387 INFO L85 PathProgramCache]: Analyzing trace with hash -585698000, now seen corresponding path program 15 times [2024-06-21 21:22:02,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:02,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793934288] [2024-06-21 21:22:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:02,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:03,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:03,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793934288] [2024-06-21 21:22:03,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793934288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:03,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:03,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:03,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498878608] [2024-06-21 21:22:03,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:03,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:03,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:03,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:03,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:03,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:03,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 191 transitions, 1537 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:03,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:03,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:03,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:03,622 INFO L124 PetriNetUnfolderBase]: 533/1030 cut-off events. [2024-06-21 21:22:03,622 INFO L125 PetriNetUnfolderBase]: For 167658/167660 co-relation queries the response was YES. [2024-06-21 21:22:03,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7213 conditions, 1030 events. 533/1030 cut-off events. For 167658/167660 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5453 event pairs, 103 based on Foata normal form. 10/1038 useless extension candidates. Maximal degree in co-relation 7104. Up to 332 conditions per place. [2024-06-21 21:22:03,630 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 116 selfloop transitions, 89 changer transitions 15/222 dead transitions. [2024-06-21 21:22:03,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 222 transitions, 2266 flow [2024-06-21 21:22:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:03,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 21:22:03,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-06-21 21:22:03,631 INFO L175 Difference]: Start difference. First operand has 249 places, 191 transitions, 1537 flow. Second operand 11 states and 146 transitions. [2024-06-21 21:22:03,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 222 transitions, 2266 flow [2024-06-21 21:22:03,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 222 transitions, 2198 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 21:22:03,932 INFO L231 Difference]: Finished difference. Result has 245 places, 187 transitions, 1629 flow [2024-06-21 21:22:03,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1629, PETRI_PLACES=245, PETRI_TRANSITIONS=187} [2024-06-21 21:22:03,932 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 215 predicate places. [2024-06-21 21:22:03,932 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 187 transitions, 1629 flow [2024-06-21 21:22:03,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:03,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:03,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:03,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 21:22:03,933 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)] === [2024-06-21 21:22:03,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:03,933 INFO L85 PathProgramCache]: Analyzing trace with hash -582123080, now seen corresponding path program 16 times [2024-06-21 21:22:03,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:03,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659565103] [2024-06-21 21:22:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:03,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:04,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:04,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659565103] [2024-06-21 21:22:04,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659565103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:04,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:04,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:04,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534672686] [2024-06-21 21:22:04,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:04,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:04,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:04,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:04,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:04,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:04,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 187 transitions, 1629 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:04,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:04,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:04,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:05,260 INFO L124 PetriNetUnfolderBase]: 544/1053 cut-off events. [2024-06-21 21:22:05,260 INFO L125 PetriNetUnfolderBase]: For 202858/202860 co-relation queries the response was YES. [2024-06-21 21:22:05,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8265 conditions, 1053 events. 544/1053 cut-off events. For 202858/202860 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5622 event pairs, 116 based on Foata normal form. 10/1061 useless extension candidates. Maximal degree in co-relation 8159. Up to 551 conditions per place. [2024-06-21 21:22:05,269 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 111 selfloop transitions, 90 changer transitions 14/217 dead transitions. [2024-06-21 21:22:05,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 217 transitions, 2340 flow [2024-06-21 21:22:05,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:22:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:22:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 155 transitions. [2024-06-21 21:22:05,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:22:05,269 INFO L175 Difference]: Start difference. First operand has 245 places, 187 transitions, 1629 flow. Second operand 12 states and 155 transitions. [2024-06-21 21:22:05,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 217 transitions, 2340 flow [2024-06-21 21:22:05,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 217 transitions, 2188 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 21:22:05,558 INFO L231 Difference]: Finished difference. Result has 241 places, 181 transitions, 1631 flow [2024-06-21 21:22:05,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1631, PETRI_PLACES=241, PETRI_TRANSITIONS=181} [2024-06-21 21:22:05,558 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 211 predicate places. [2024-06-21 21:22:05,558 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 181 transitions, 1631 flow [2024-06-21 21:22:05,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:05,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:05,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:05,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 21:22:05,559 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)] === [2024-06-21 21:22:05,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:05,559 INFO L85 PathProgramCache]: Analyzing trace with hash -581978930, now seen corresponding path program 17 times [2024-06-21 21:22:05,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:05,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812839805] [2024-06-21 21:22:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:05,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:06,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:06,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812839805] [2024-06-21 21:22:06,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812839805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:06,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:06,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:06,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058972812] [2024-06-21 21:22:06,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:06,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:06,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:06,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:06,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:06,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:06,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 181 transitions, 1631 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:06,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:06,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:06,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:06,834 INFO L124 PetriNetUnfolderBase]: 524/1017 cut-off events. [2024-06-21 21:22:06,834 INFO L125 PetriNetUnfolderBase]: For 188616/188618 co-relation queries the response was YES. [2024-06-21 21:22:06,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8106 conditions, 1017 events. 524/1017 cut-off events. For 188616/188618 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5368 event pairs, 110 based on Foata normal form. 10/1025 useless extension candidates. Maximal degree in co-relation 8003. Up to 551 conditions per place. [2024-06-21 21:22:06,842 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 107 selfloop transitions, 91 changer transitions 11/211 dead transitions. [2024-06-21 21:22:06,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 211 transitions, 2324 flow [2024-06-21 21:22:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:22:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:22:06,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 160 transitions. [2024-06-21 21:22:06,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3970223325062035 [2024-06-21 21:22:06,844 INFO L175 Difference]: Start difference. First operand has 241 places, 181 transitions, 1631 flow. Second operand 13 states and 160 transitions. [2024-06-21 21:22:06,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 211 transitions, 2324 flow [2024-06-21 21:22:07,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 211 transitions, 2133 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-21 21:22:07,126 INFO L231 Difference]: Finished difference. Result has 235 places, 176 transitions, 1596 flow [2024-06-21 21:22:07,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1596, PETRI_PLACES=235, PETRI_TRANSITIONS=176} [2024-06-21 21:22:07,127 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2024-06-21 21:22:07,127 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 176 transitions, 1596 flow [2024-06-21 21:22:07,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:07,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:07,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:07,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 21:22:07,128 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)] === [2024-06-21 21:22:07,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:07,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2134984926, now seen corresponding path program 18 times [2024-06-21 21:22:07,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:07,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646069139] [2024-06-21 21:22:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:07,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:07,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:07,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646069139] [2024-06-21 21:22:07,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646069139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:07,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:07,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:07,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524021475] [2024-06-21 21:22:07,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:07,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:07,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:07,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:07,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:07,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:07,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 176 transitions, 1596 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:07,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:07,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:07,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:08,331 INFO L124 PetriNetUnfolderBase]: 514/1003 cut-off events. [2024-06-21 21:22:08,331 INFO L125 PetriNetUnfolderBase]: For 176299/176301 co-relation queries the response was YES. [2024-06-21 21:22:08,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7872 conditions, 1003 events. 514/1003 cut-off events. For 176299/176301 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5346 event pairs, 102 based on Foata normal form. 12/1013 useless extension candidates. Maximal degree in co-relation 7773. Up to 589 conditions per place. [2024-06-21 21:22:08,338 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 89 selfloop transitions, 90 changer transitions 18/199 dead transitions. [2024-06-21 21:22:08,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 199 transitions, 2075 flow [2024-06-21 21:22:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:08,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 21:22:08,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 21:22:08,339 INFO L175 Difference]: Start difference. First operand has 235 places, 176 transitions, 1596 flow. Second operand 11 states and 139 transitions. [2024-06-21 21:22:08,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 199 transitions, 2075 flow [2024-06-21 21:22:08,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 199 transitions, 1893 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-21 21:22:08,553 INFO L231 Difference]: Finished difference. Result has 230 places, 169 transitions, 1543 flow [2024-06-21 21:22:08,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1543, PETRI_PLACES=230, PETRI_TRANSITIONS=169} [2024-06-21 21:22:08,553 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 200 predicate places. [2024-06-21 21:22:08,553 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 169 transitions, 1543 flow [2024-06-21 21:22:08,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:08,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:08,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:08,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 21:22:08,554 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)] === [2024-06-21 21:22:08,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:08,554 INFO L85 PathProgramCache]: Analyzing trace with hash -938875102, now seen corresponding path program 19 times [2024-06-21 21:22:08,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:08,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90488737] [2024-06-21 21:22:08,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:08,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:09,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:09,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90488737] [2024-06-21 21:22:09,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90488737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:09,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:09,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:09,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487601086] [2024-06-21 21:22:09,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:09,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:09,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:09,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:09,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:09,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:09,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 169 transitions, 1543 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:09,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:09,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:09,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:09,773 INFO L124 PetriNetUnfolderBase]: 496/973 cut-off events. [2024-06-21 21:22:09,773 INFO L125 PetriNetUnfolderBase]: For 167271/167271 co-relation queries the response was YES. [2024-06-21 21:22:09,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7638 conditions, 973 events. 496/973 cut-off events. For 167271/167271 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5159 event pairs, 114 based on Foata normal form. 10/981 useless extension candidates. Maximal degree in co-relation 7541. Up to 699 conditions per place. [2024-06-21 21:22:09,780 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 118 selfloop transitions, 55 changer transitions 12/187 dead transitions. [2024-06-21 21:22:09,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 187 transitions, 1979 flow [2024-06-21 21:22:09,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:09,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 21:22:09,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 21:22:09,781 INFO L175 Difference]: Start difference. First operand has 230 places, 169 transitions, 1543 flow. Second operand 11 states and 131 transitions. [2024-06-21 21:22:09,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 187 transitions, 1979 flow [2024-06-21 21:22:09,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 187 transitions, 1789 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 21:22:09,988 INFO L231 Difference]: Finished difference. Result has 224 places, 165 transitions, 1441 flow [2024-06-21 21:22:09,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1355, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1441, PETRI_PLACES=224, PETRI_TRANSITIONS=165} [2024-06-21 21:22:09,988 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2024-06-21 21:22:09,988 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 165 transitions, 1441 flow [2024-06-21 21:22:09,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:09,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:09,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:09,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 21:22:09,989 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)] === [2024-06-21 21:22:09,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash 614130894, now seen corresponding path program 20 times [2024-06-21 21:22:09,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:09,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263103088] [2024-06-21 21:22:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:09,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:10,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:10,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263103088] [2024-06-21 21:22:10,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263103088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:10,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:10,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:10,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899675440] [2024-06-21 21:22:10,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:10,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:10,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:10,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:10,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:10,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:10,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 165 transitions, 1441 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:10,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:10,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:10,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:11,299 INFO L124 PetriNetUnfolderBase]: 486/959 cut-off events. [2024-06-21 21:22:11,299 INFO L125 PetriNetUnfolderBase]: For 153064/153064 co-relation queries the response was YES. [2024-06-21 21:22:11,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7338 conditions, 959 events. 486/959 cut-off events. For 153064/153064 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5082 event pairs, 150 based on Foata normal form. 8/965 useless extension candidates. Maximal degree in co-relation 7243. Up to 788 conditions per place. [2024-06-21 21:22:11,307 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 136 selfloop transitions, 32 changer transitions 15/185 dead transitions. [2024-06-21 21:22:11,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 185 transitions, 1875 flow [2024-06-21 21:22:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:22:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:22:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 21:22:11,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 21:22:11,307 INFO L175 Difference]: Start difference. First operand has 224 places, 165 transitions, 1441 flow. Second operand 12 states and 135 transitions. [2024-06-21 21:22:11,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 185 transitions, 1875 flow [2024-06-21 21:22:11,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 185 transitions, 1761 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:22:11,512 INFO L231 Difference]: Finished difference. Result has 224 places, 161 transitions, 1356 flow [2024-06-21 21:22:11,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1356, PETRI_PLACES=224, PETRI_TRANSITIONS=161} [2024-06-21 21:22:11,512 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2024-06-21 21:22:11,512 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 161 transitions, 1356 flow [2024-06-21 21:22:11,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:11,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:11,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:11,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 21:22:11,513 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)] === [2024-06-21 21:22:11,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:11,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1991094396, now seen corresponding path program 21 times [2024-06-21 21:22:11,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:11,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324405110] [2024-06-21 21:22:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:11,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:12,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:12,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324405110] [2024-06-21 21:22:12,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324405110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:12,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:12,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:12,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452648011] [2024-06-21 21:22:12,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:12,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:12,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:12,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:12,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:12,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:12,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 161 transitions, 1356 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:12,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:12,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:12,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:12,698 INFO L124 PetriNetUnfolderBase]: 480/948 cut-off events. [2024-06-21 21:22:12,698 INFO L125 PetriNetUnfolderBase]: For 154017/154019 co-relation queries the response was YES. [2024-06-21 21:22:12,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7192 conditions, 948 events. 480/948 cut-off events. For 154017/154019 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5028 event pairs, 114 based on Foata normal form. 12/958 useless extension candidates. Maximal degree in co-relation 7097. Up to 683 conditions per place. [2024-06-21 21:22:12,705 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 111 selfloop transitions, 52 changer transitions 17/182 dead transitions. [2024-06-21 21:22:12,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 182 transitions, 1791 flow [2024-06-21 21:22:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 21:22:12,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 21:22:12,705 INFO L175 Difference]: Start difference. First operand has 224 places, 161 transitions, 1356 flow. Second operand 11 states and 134 transitions. [2024-06-21 21:22:12,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 182 transitions, 1791 flow [2024-06-21 21:22:12,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 182 transitions, 1721 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:22:12,906 INFO L231 Difference]: Finished difference. Result has 219 places, 154 transitions, 1334 flow [2024-06-21 21:22:12,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1334, PETRI_PLACES=219, PETRI_TRANSITIONS=154} [2024-06-21 21:22:12,907 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 189 predicate places. [2024-06-21 21:22:12,907 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 154 transitions, 1334 flow [2024-06-21 21:22:12,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:12,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:12,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:12,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 21:22:12,907 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)] === [2024-06-21 21:22:12,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:12,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1996456776, now seen corresponding path program 22 times [2024-06-21 21:22:12,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:12,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114334220] [2024-06-21 21:22:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:12,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:13,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:13,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114334220] [2024-06-21 21:22:13,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114334220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:13,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:13,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:13,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508148505] [2024-06-21 21:22:13,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:13,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:13,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:13,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:13,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:13,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:13,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 154 transitions, 1334 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:13,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:13,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:13,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:14,208 INFO L124 PetriNetUnfolderBase]: 438/866 cut-off events. [2024-06-21 21:22:14,208 INFO L125 PetriNetUnfolderBase]: For 124923/124925 co-relation queries the response was YES. [2024-06-21 21:22:14,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6189 conditions, 866 events. 438/866 cut-off events. For 124923/124925 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4457 event pairs, 93 based on Foata normal form. 12/876 useless extension candidates. Maximal degree in co-relation 6096. Up to 604 conditions per place. [2024-06-21 21:22:14,214 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 106 selfloop transitions, 46 changer transitions 22/176 dead transitions. [2024-06-21 21:22:14,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 176 transitions, 1759 flow [2024-06-21 21:22:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:22:14,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:22:14,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 21:22:14,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 21:22:14,214 INFO L175 Difference]: Start difference. First operand has 219 places, 154 transitions, 1334 flow. Second operand 12 states and 141 transitions. [2024-06-21 21:22:14,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 176 transitions, 1759 flow [2024-06-21 21:22:14,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 176 transitions, 1649 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 21:22:14,424 INFO L231 Difference]: Finished difference. Result has 215 places, 143 transitions, 1230 flow [2024-06-21 21:22:14,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1230, PETRI_PLACES=215, PETRI_TRANSITIONS=143} [2024-06-21 21:22:14,424 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 185 predicate places. [2024-06-21 21:22:14,425 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 143 transitions, 1230 flow [2024-06-21 21:22:14,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:14,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:14,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:14,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 21:22:14,425 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)] === [2024-06-21 21:22:14,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:14,425 INFO L85 PathProgramCache]: Analyzing trace with hash 621764830, now seen corresponding path program 1 times [2024-06-21 21:22:14,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:14,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999706105] [2024-06-21 21:22:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:14,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:15,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:15,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999706105] [2024-06-21 21:22:15,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999706105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:15,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:15,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:15,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349298727] [2024-06-21 21:22:15,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:15,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:15,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:15,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:15,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:15,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:15,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 143 transitions, 1230 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:15,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:15,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:15,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:15,616 INFO L124 PetriNetUnfolderBase]: 416/825 cut-off events. [2024-06-21 21:22:15,617 INFO L125 PetriNetUnfolderBase]: For 113136/113136 co-relation queries the response was YES. [2024-06-21 21:22:15,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5904 conditions, 825 events. 416/825 cut-off events. For 113136/113136 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4195 event pairs, 96 based on Foata normal form. 8/831 useless extension candidates. Maximal degree in co-relation 5813. Up to 593 conditions per place. [2024-06-21 21:22:15,622 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 107 selfloop transitions, 30 changer transitions 20/159 dead transitions. [2024-06-21 21:22:15,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 159 transitions, 1594 flow [2024-06-21 21:22:15,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:22:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:22:15,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 21:22:15,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-21 21:22:15,623 INFO L175 Difference]: Start difference. First operand has 215 places, 143 transitions, 1230 flow. Second operand 10 states and 117 transitions. [2024-06-21 21:22:15,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 159 transitions, 1594 flow [2024-06-21 21:22:15,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 159 transitions, 1458 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-06-21 21:22:15,770 INFO L231 Difference]: Finished difference. Result has 200 places, 132 transitions, 1066 flow [2024-06-21 21:22:15,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1066, PETRI_PLACES=200, PETRI_TRANSITIONS=132} [2024-06-21 21:22:15,771 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2024-06-21 21:22:15,771 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 132 transitions, 1066 flow [2024-06-21 21:22:15,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:15,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:15,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:15,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 21:22:15,772 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)] === [2024-06-21 21:22:15,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:15,772 INFO L85 PathProgramCache]: Analyzing trace with hash 414684954, now seen corresponding path program 23 times [2024-06-21 21:22:15,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:15,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878221048] [2024-06-21 21:22:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:15,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:16,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:16,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878221048] [2024-06-21 21:22:16,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878221048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:16,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:16,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:16,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815495744] [2024-06-21 21:22:16,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:16,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:16,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:16,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:16,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:16,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:16,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 132 transitions, 1066 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:16,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:16,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:16,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:17,074 INFO L124 PetriNetUnfolderBase]: 415/818 cut-off events. [2024-06-21 21:22:17,074 INFO L125 PetriNetUnfolderBase]: For 121177/121177 co-relation queries the response was YES. [2024-06-21 21:22:17,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6261 conditions, 818 events. 415/818 cut-off events. For 121177/121177 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4120 event pairs, 113 based on Foata normal form. 8/824 useless extension candidates. Maximal degree in co-relation 6185. Up to 500 conditions per place. [2024-06-21 21:22:17,080 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 104 selfloop transitions, 39 changer transitions 10/155 dead transitions. [2024-06-21 21:22:17,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 155 transitions, 1588 flow [2024-06-21 21:22:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 21:22:17,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 21:22:17,080 INFO L175 Difference]: Start difference. First operand has 200 places, 132 transitions, 1066 flow. Second operand 11 states and 133 transitions. [2024-06-21 21:22:17,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 155 transitions, 1588 flow [2024-06-21 21:22:17,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 155 transitions, 1453 flow, removed 9 selfloop flow, removed 15 redundant places. [2024-06-21 21:22:17,217 INFO L231 Difference]: Finished difference. Result has 186 places, 129 transitions, 1003 flow [2024-06-21 21:22:17,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1003, PETRI_PLACES=186, PETRI_TRANSITIONS=129} [2024-06-21 21:22:17,218 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2024-06-21 21:22:17,218 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 129 transitions, 1003 flow [2024-06-21 21:22:17,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:17,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:17,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:17,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 21:22:17,218 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)] === [2024-06-21 21:22:17,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:17,218 INFO L85 PathProgramCache]: Analyzing trace with hash 420191484, now seen corresponding path program 24 times [2024-06-21 21:22:17,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:17,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738764637] [2024-06-21 21:22:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:17,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:18,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:18,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738764637] [2024-06-21 21:22:18,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738764637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:18,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:18,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:18,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256106370] [2024-06-21 21:22:18,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:18,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:18,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:18,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:18,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:18,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:18,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 129 transitions, 1003 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:18,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:18,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:18,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:18,500 INFO L124 PetriNetUnfolderBase]: 444/877 cut-off events. [2024-06-21 21:22:18,500 INFO L125 PetriNetUnfolderBase]: For 129228/129228 co-relation queries the response was YES. [2024-06-21 21:22:18,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6869 conditions, 877 events. 444/877 cut-off events. For 129228/129228 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4529 event pairs, 154 based on Foata normal form. 8/883 useless extension candidates. Maximal degree in co-relation 6797. Up to 669 conditions per place. [2024-06-21 21:22:18,506 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 118 selfloop transitions, 28 changer transitions 8/156 dead transitions. [2024-06-21 21:22:18,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 156 transitions, 1552 flow [2024-06-21 21:22:18,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:22:18,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:22:18,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-21 21:22:18,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:22:18,507 INFO L175 Difference]: Start difference. First operand has 186 places, 129 transitions, 1003 flow. Second operand 12 states and 138 transitions. [2024-06-21 21:22:18,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 156 transitions, 1552 flow [2024-06-21 21:22:18,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 156 transitions, 1468 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 21:22:18,627 INFO L231 Difference]: Finished difference. Result has 186 places, 130 transitions, 998 flow [2024-06-21 21:22:18,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=998, PETRI_PLACES=186, PETRI_TRANSITIONS=130} [2024-06-21 21:22:18,627 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2024-06-21 21:22:18,627 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 130 transitions, 998 flow [2024-06-21 21:22:18,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:18,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:18,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:18,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 21:22:18,628 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)] === [2024-06-21 21:22:18,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:18,628 INFO L85 PathProgramCache]: Analyzing trace with hash 414829104, now seen corresponding path program 25 times [2024-06-21 21:22:18,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:18,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465542007] [2024-06-21 21:22:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:18,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:19,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:19,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465542007] [2024-06-21 21:22:19,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465542007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:19,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:19,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:19,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476386836] [2024-06-21 21:22:19,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:19,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:19,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:19,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:19,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:19,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:19,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 130 transitions, 998 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:19,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:19,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:19,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:19,859 INFO L124 PetriNetUnfolderBase]: 460/913 cut-off events. [2024-06-21 21:22:19,860 INFO L125 PetriNetUnfolderBase]: For 135149/135149 co-relation queries the response was YES. [2024-06-21 21:22:19,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7328 conditions, 913 events. 460/913 cut-off events. For 135149/135149 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4757 event pairs, 138 based on Foata normal form. 8/919 useless extension candidates. Maximal degree in co-relation 7256. Up to 556 conditions per place. [2024-06-21 21:22:19,866 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 101 selfloop transitions, 41 changer transitions 9/153 dead transitions. [2024-06-21 21:22:19,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 153 transitions, 1506 flow [2024-06-21 21:22:19,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:22:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:22:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 21:22:19,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-21 21:22:19,866 INFO L175 Difference]: Start difference. First operand has 186 places, 130 transitions, 998 flow. Second operand 12 states and 139 transitions. [2024-06-21 21:22:19,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 153 transitions, 1506 flow [2024-06-21 21:22:20,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 153 transitions, 1447 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:22:20,021 INFO L231 Difference]: Finished difference. Result has 187 places, 126 transitions, 991 flow [2024-06-21 21:22:20,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=991, PETRI_PLACES=187, PETRI_TRANSITIONS=126} [2024-06-21 21:22:20,021 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 157 predicate places. [2024-06-21 21:22:20,021 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 126 transitions, 991 flow [2024-06-21 21:22:20,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:20,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:20,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:20,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 21:22:20,022 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)] === [2024-06-21 21:22:20,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:20,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1132814512, now seen corresponding path program 26 times [2024-06-21 21:22:20,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:20,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281730492] [2024-06-21 21:22:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:20,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:20,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:20,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281730492] [2024-06-21 21:22:20,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281730492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:20,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:20,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:20,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646986832] [2024-06-21 21:22:20,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:20,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:20,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:20,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:20,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:20,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:20,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 126 transitions, 991 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:20,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:20,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:20,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:21,173 INFO L124 PetriNetUnfolderBase]: 439/878 cut-off events. [2024-06-21 21:22:21,173 INFO L125 PetriNetUnfolderBase]: For 138781/138781 co-relation queries the response was YES. [2024-06-21 21:22:21,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6642 conditions, 878 events. 439/878 cut-off events. For 138781/138781 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4575 event pairs, 133 based on Foata normal form. 20/896 useless extension candidates. Maximal degree in co-relation 6571. Up to 613 conditions per place. [2024-06-21 21:22:21,178 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 86 selfloop transitions, 35 changer transitions 20/143 dead transitions. [2024-06-21 21:22:21,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 143 transitions, 1333 flow [2024-06-21 21:22:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 21:22:21,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 21:22:21,179 INFO L175 Difference]: Start difference. First operand has 187 places, 126 transitions, 991 flow. Second operand 11 states and 126 transitions. [2024-06-21 21:22:21,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 143 transitions, 1333 flow [2024-06-21 21:22:21,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 143 transitions, 1253 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 21:22:21,293 INFO L231 Difference]: Finished difference. Result has 184 places, 116 transitions, 894 flow [2024-06-21 21:22:21,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=894, PETRI_PLACES=184, PETRI_TRANSITIONS=116} [2024-06-21 21:22:21,293 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2024-06-21 21:22:21,293 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 116 transitions, 894 flow [2024-06-21 21:22:21,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:21,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:21,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:21,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 21:22:21,294 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)] === [2024-06-21 21:22:21,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:21,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1138176892, now seen corresponding path program 27 times [2024-06-21 21:22:21,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:21,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263498837] [2024-06-21 21:22:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:21,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:22,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:22,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263498837] [2024-06-21 21:22:22,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263498837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:22,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:22,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:22,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126242399] [2024-06-21 21:22:22,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:22,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:22,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:22,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:22,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:22,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:22,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 116 transitions, 894 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:22,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:22,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:22,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:22,536 INFO L124 PetriNetUnfolderBase]: 374/747 cut-off events. [2024-06-21 21:22:22,536 INFO L125 PetriNetUnfolderBase]: For 99818/99818 co-relation queries the response was YES. [2024-06-21 21:22:22,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5507 conditions, 747 events. 374/747 cut-off events. For 99818/99818 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3688 event pairs, 108 based on Foata normal form. 10/755 useless extension candidates. Maximal degree in co-relation 5437. Up to 531 conditions per place. [2024-06-21 21:22:22,540 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 81 selfloop transitions, 28 changer transitions 23/134 dead transitions. [2024-06-21 21:22:22,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 134 transitions, 1220 flow [2024-06-21 21:22:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:22:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:22:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 21:22:22,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-21 21:22:22,541 INFO L175 Difference]: Start difference. First operand has 184 places, 116 transitions, 894 flow. Second operand 12 states and 134 transitions. [2024-06-21 21:22:22,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 134 transitions, 1220 flow [2024-06-21 21:22:22,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 134 transitions, 1142 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:22:22,622 INFO L231 Difference]: Finished difference. Result has 175 places, 102 transitions, 770 flow [2024-06-21 21:22:22,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=770, PETRI_PLACES=175, PETRI_TRANSITIONS=102} [2024-06-21 21:22:22,622 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2024-06-21 21:22:22,622 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 102 transitions, 770 flow [2024-06-21 21:22:22,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:22,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:22,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:22,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 21:22:22,623 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)] === [2024-06-21 21:22:22,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:22,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1714395584, now seen corresponding path program 2 times [2024-06-21 21:22:22,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:22,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604986596] [2024-06-21 21:22:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:22,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:23,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:23,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604986596] [2024-06-21 21:22:23,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604986596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:23,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:23,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:23,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190878347] [2024-06-21 21:22:23,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:23,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:23,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:23,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:23,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:23,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:23,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 102 transitions, 770 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:23,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:23,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:23,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:23,837 INFO L124 PetriNetUnfolderBase]: 341/674 cut-off events. [2024-06-21 21:22:23,837 INFO L125 PetriNetUnfolderBase]: For 77568/77568 co-relation queries the response was YES. [2024-06-21 21:22:23,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5063 conditions, 674 events. 341/674 cut-off events. For 77568/77568 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3224 event pairs, 131 based on Foata normal form. 2/674 useless extension candidates. Maximal degree in co-relation 4996. Up to 612 conditions per place. [2024-06-21 21:22:23,841 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 99 selfloop transitions, 17 changer transitions 0/118 dead transitions. [2024-06-21 21:22:23,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 118 transitions, 1055 flow [2024-06-21 21:22:23,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:22:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:22:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 21:22:23,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:22:23,842 INFO L175 Difference]: Start difference. First operand has 175 places, 102 transitions, 770 flow. Second operand 10 states and 110 transitions. [2024-06-21 21:22:23,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 118 transitions, 1055 flow [2024-06-21 21:22:23,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 118 transitions, 973 flow, removed 8 selfloop flow, removed 19 redundant places. [2024-06-21 21:22:23,934 INFO L231 Difference]: Finished difference. Result has 153 places, 105 transitions, 760 flow [2024-06-21 21:22:23,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=760, PETRI_PLACES=153, PETRI_TRANSITIONS=105} [2024-06-21 21:22:23,934 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2024-06-21 21:22:23,934 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 105 transitions, 760 flow [2024-06-21 21:22:23,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:23,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:23,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:23,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 21:22:23,934 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)] === [2024-06-21 21:22:23,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:23,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1722023940, now seen corresponding path program 28 times [2024-06-21 21:22:23,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:23,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212896918] [2024-06-21 21:22:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:23,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:24,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:24,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212896918] [2024-06-21 21:22:24,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212896918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:24,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:24,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:24,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549715908] [2024-06-21 21:22:24,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:24,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:24,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:24,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:24,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:24,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:24,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 105 transitions, 760 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:24,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:24,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:24,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:25,103 INFO L124 PetriNetUnfolderBase]: 357/710 cut-off events. [2024-06-21 21:22:25,103 INFO L125 PetriNetUnfolderBase]: For 68722/68722 co-relation queries the response was YES. [2024-06-21 21:22:25,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4833 conditions, 710 events. 357/710 cut-off events. For 68722/68722 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3485 event pairs, 143 based on Foata normal form. 10/718 useless extension candidates. Maximal degree in co-relation 4772. Up to 592 conditions per place. [2024-06-21 21:22:25,107 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 87 selfloop transitions, 24 changer transitions 11/124 dead transitions. [2024-06-21 21:22:25,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 124 transitions, 1072 flow [2024-06-21 21:22:25,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:25,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 21:22:25,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 21:22:25,108 INFO L175 Difference]: Start difference. First operand has 153 places, 105 transitions, 760 flow. Second operand 11 states and 126 transitions. [2024-06-21 21:22:25,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 124 transitions, 1072 flow [2024-06-21 21:22:25,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 124 transitions, 1043 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 21:22:25,172 INFO L231 Difference]: Finished difference. Result has 157 places, 102 transitions, 762 flow [2024-06-21 21:22:25,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=762, PETRI_PLACES=157, PETRI_TRANSITIONS=102} [2024-06-21 21:22:25,173 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 127 predicate places. [2024-06-21 21:22:25,173 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 102 transitions, 762 flow [2024-06-21 21:22:25,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:25,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:25,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:25,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 21:22:25,173 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)] === [2024-06-21 21:22:25,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:25,173 INFO L85 PathProgramCache]: Analyzing trace with hash 689637598, now seen corresponding path program 29 times [2024-06-21 21:22:25,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:25,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446979994] [2024-06-21 21:22:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:25,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:25,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:25,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446979994] [2024-06-21 21:22:25,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446979994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:25,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:25,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:25,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283950988] [2024-06-21 21:22:25,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:25,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:25,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:25,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:25,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:26,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:26,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 102 transitions, 762 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:26,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:26,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:26,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:26,401 INFO L124 PetriNetUnfolderBase]: 345/690 cut-off events. [2024-06-21 21:22:26,401 INFO L125 PetriNetUnfolderBase]: For 69128/69128 co-relation queries the response was YES. [2024-06-21 21:22:26,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4814 conditions, 690 events. 345/690 cut-off events. For 69128/69128 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3346 event pairs, 133 based on Foata normal form. 8/696 useless extension candidates. Maximal degree in co-relation 4752. Up to 383 conditions per place. [2024-06-21 21:22:26,404 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 80 selfloop transitions, 35 changer transitions 10/127 dead transitions. [2024-06-21 21:22:26,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 127 transitions, 1210 flow [2024-06-21 21:22:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 21:22:26,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 21:22:26,405 INFO L175 Difference]: Start difference. First operand has 157 places, 102 transitions, 762 flow. Second operand 11 states and 134 transitions. [2024-06-21 21:22:26,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 127 transitions, 1210 flow [2024-06-21 21:22:26,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 127 transitions, 1154 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:22:26,475 INFO L231 Difference]: Finished difference. Result has 155 places, 99 transitions, 766 flow [2024-06-21 21:22:26,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=766, PETRI_PLACES=155, PETRI_TRANSITIONS=99} [2024-06-21 21:22:26,476 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2024-06-21 21:22:26,476 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 99 transitions, 766 flow [2024-06-21 21:22:26,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:26,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:26,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:26,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 21:22:26,476 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)] === [2024-06-21 21:22:26,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:26,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1722029520, now seen corresponding path program 30 times [2024-06-21 21:22:26,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:26,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977462266] [2024-06-21 21:22:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:26,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:27,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:27,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977462266] [2024-06-21 21:22:27,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977462266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:27,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:27,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:27,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467058953] [2024-06-21 21:22:27,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:27,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:27,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:27,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:27,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:27,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:27,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 99 transitions, 766 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:27,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:27,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:27,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:27,568 INFO L124 PetriNetUnfolderBase]: 335/672 cut-off events. [2024-06-21 21:22:27,568 INFO L125 PetriNetUnfolderBase]: For 66384/66384 co-relation queries the response was YES. [2024-06-21 21:22:27,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4743 conditions, 672 events. 335/672 cut-off events. For 66384/66384 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3251 event pairs, 139 based on Foata normal form. 8/678 useless extension candidates. Maximal degree in co-relation 4682. Up to 600 conditions per place. [2024-06-21 21:22:27,572 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 91 selfloop transitions, 9 changer transitions 13/115 dead transitions. [2024-06-21 21:22:27,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 115 transitions, 1042 flow [2024-06-21 21:22:27,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-21 21:22:27,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-21 21:22:27,573 INFO L175 Difference]: Start difference. First operand has 155 places, 99 transitions, 766 flow. Second operand 11 states and 117 transitions. [2024-06-21 21:22:27,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 115 transitions, 1042 flow [2024-06-21 21:22:27,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 115 transitions, 982 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:22:27,635 INFO L231 Difference]: Finished difference. Result has 152 places, 95 transitions, 696 flow [2024-06-21 21:22:27,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=696, PETRI_PLACES=152, PETRI_TRANSITIONS=95} [2024-06-21 21:22:27,636 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 122 predicate places. [2024-06-21 21:22:27,636 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 95 transitions, 696 flow [2024-06-21 21:22:27,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:27,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:27,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:27,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 21:22:27,637 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)] === [2024-06-21 21:22:27,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:27,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1141493086, now seen corresponding path program 3 times [2024-06-21 21:22:27,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:27,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50724184] [2024-06-21 21:22:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:27,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:28,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:28,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50724184] [2024-06-21 21:22:28,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50724184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:28,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:28,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:28,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377856873] [2024-06-21 21:22:28,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:28,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:28,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:28,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:28,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:28,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:28,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 95 transitions, 696 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:28,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:28,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:28,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:28,819 INFO L124 PetriNetUnfolderBase]: 319/636 cut-off events. [2024-06-21 21:22:28,819 INFO L125 PetriNetUnfolderBase]: For 54640/54640 co-relation queries the response was YES. [2024-06-21 21:22:28,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4501 conditions, 636 events. 319/636 cut-off events. For 54640/54640 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2986 event pairs, 124 based on Foata normal form. 2/636 useless extension candidates. Maximal degree in co-relation 4442. Up to 589 conditions per place. [2024-06-21 21:22:28,823 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 92 selfloop transitions, 14 changer transitions 0/108 dead transitions. [2024-06-21 21:22:28,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 108 transitions, 942 flow [2024-06-21 21:22:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:22:28,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:22:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 21:22:28,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-21 21:22:28,824 INFO L175 Difference]: Start difference. First operand has 152 places, 95 transitions, 696 flow. Second operand 10 states and 106 transitions. [2024-06-21 21:22:28,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 108 transitions, 942 flow [2024-06-21 21:22:28,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 108 transitions, 916 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:22:28,870 INFO L231 Difference]: Finished difference. Result has 145 places, 96 transitions, 712 flow [2024-06-21 21:22:28,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=712, PETRI_PLACES=145, PETRI_TRANSITIONS=96} [2024-06-21 21:22:28,872 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-21 21:22:28,872 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 96 transitions, 712 flow [2024-06-21 21:22:28,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:28,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:28,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:28,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 21:22:28,873 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)] === [2024-06-21 21:22:28,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:28,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1152544276, now seen corresponding path program 4 times [2024-06-21 21:22:28,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:28,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221443844] [2024-06-21 21:22:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:28,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:29,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:29,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221443844] [2024-06-21 21:22:29,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221443844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:29,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:29,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:29,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333575794] [2024-06-21 21:22:29,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:29,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:29,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:29,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:29,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:29,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:29,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 96 transitions, 712 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:29,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:29,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:29,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:30,179 INFO L124 PetriNetUnfolderBase]: 323/644 cut-off events. [2024-06-21 21:22:30,179 INFO L125 PetriNetUnfolderBase]: For 47718/47718 co-relation queries the response was YES. [2024-06-21 21:22:30,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4424 conditions, 644 events. 323/644 cut-off events. For 47718/47718 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3047 event pairs, 139 based on Foata normal form. 2/644 useless extension candidates. Maximal degree in co-relation 4368. Up to 591 conditions per place. [2024-06-21 21:22:30,182 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 87 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-21 21:22:30,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 109 transitions, 966 flow [2024-06-21 21:22:30,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:22:30,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:22:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-21 21:22:30,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-21 21:22:30,183 INFO L175 Difference]: Start difference. First operand has 145 places, 96 transitions, 712 flow. Second operand 10 states and 109 transitions. [2024-06-21 21:22:30,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 109 transitions, 966 flow [2024-06-21 21:22:30,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 109 transitions, 934 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:22:30,226 INFO L231 Difference]: Finished difference. Result has 147 places, 97 transitions, 737 flow [2024-06-21 21:22:30,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=737, PETRI_PLACES=147, PETRI_TRANSITIONS=97} [2024-06-21 21:22:30,226 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2024-06-21 21:22:30,226 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 97 transitions, 737 flow [2024-06-21 21:22:30,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:30,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:30,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:30,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 21:22:30,227 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)] === [2024-06-21 21:22:30,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:30,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2128551882, now seen corresponding path program 31 times [2024-06-21 21:22:30,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:30,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467446360] [2024-06-21 21:22:30,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:30,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:31,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:31,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467446360] [2024-06-21 21:22:31,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467446360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:31,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:31,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:31,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155936573] [2024-06-21 21:22:31,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:31,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:31,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:31,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:31,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:31,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:31,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 97 transitions, 737 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:31,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:31,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:31,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:31,506 INFO L124 PetriNetUnfolderBase]: 364/731 cut-off events. [2024-06-21 21:22:31,507 INFO L125 PetriNetUnfolderBase]: For 65663/65663 co-relation queries the response was YES. [2024-06-21 21:22:31,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5211 conditions, 731 events. 364/731 cut-off events. For 65663/65663 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3667 event pairs, 148 based on Foata normal form. 8/737 useless extension candidates. Maximal degree in co-relation 5154. Up to 503 conditions per place. [2024-06-21 21:22:31,512 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 79 selfloop transitions, 32 changer transitions 9/122 dead transitions. [2024-06-21 21:22:31,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 122 transitions, 1161 flow [2024-06-21 21:22:31,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:22:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:22:31,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 21:22:31,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-21 21:22:31,513 INFO L175 Difference]: Start difference. First operand has 147 places, 97 transitions, 737 flow. Second operand 12 states and 142 transitions. [2024-06-21 21:22:31,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 122 transitions, 1161 flow [2024-06-21 21:22:31,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 122 transitions, 1116 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 21:22:31,569 INFO L231 Difference]: Finished difference. Result has 151 places, 93 transitions, 732 flow [2024-06-21 21:22:31,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=732, PETRI_PLACES=151, PETRI_TRANSITIONS=93} [2024-06-21 21:22:31,569 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2024-06-21 21:22:31,569 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 93 transitions, 732 flow [2024-06-21 21:22:31,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:31,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:31,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:31,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 21:22:31,570 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)] === [2024-06-21 21:22:31,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:31,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2128557462, now seen corresponding path program 32 times [2024-06-21 21:22:31,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:31,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83180854] [2024-06-21 21:22:31,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:31,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:32,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:32,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83180854] [2024-06-21 21:22:32,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83180854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:32,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:32,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:32,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904425289] [2024-06-21 21:22:32,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:32,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:32,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:32,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:32,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:32,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:32,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 93 transitions, 732 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:32,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:32,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:32,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:32,738 INFO L124 PetriNetUnfolderBase]: 327/660 cut-off events. [2024-06-21 21:22:32,738 INFO L125 PetriNetUnfolderBase]: For 60878/60878 co-relation queries the response was YES. [2024-06-21 21:22:32,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4610 conditions, 660 events. 327/660 cut-off events. For 60878/60878 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3191 event pairs, 135 based on Foata normal form. 10/668 useless extension candidates. Maximal degree in co-relation 4552. Up to 503 conditions per place. [2024-06-21 21:22:32,742 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 67 selfloop transitions, 23 changer transitions 21/113 dead transitions. [2024-06-21 21:22:32,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 113 transitions, 1024 flow [2024-06-21 21:22:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:22:32,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:22:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-21 21:22:32,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 21:22:32,743 INFO L175 Difference]: Start difference. First operand has 151 places, 93 transitions, 732 flow. Second operand 12 states and 136 transitions. [2024-06-21 21:22:32,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 113 transitions, 1024 flow [2024-06-21 21:22:32,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 113 transitions, 958 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 21:22:32,793 INFO L231 Difference]: Finished difference. Result has 148 places, 82 transitions, 639 flow [2024-06-21 21:22:32,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=639, PETRI_PLACES=148, PETRI_TRANSITIONS=82} [2024-06-21 21:22:32,794 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2024-06-21 21:22:32,794 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 82 transitions, 639 flow [2024-06-21 21:22:32,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:32,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:32,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:32,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 21:22:32,794 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)] === [2024-06-21 21:22:32,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:32,794 INFO L85 PathProgramCache]: Analyzing trace with hash -563932908, now seen corresponding path program 5 times [2024-06-21 21:22:32,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:32,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851765937] [2024-06-21 21:22:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:32,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:33,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:33,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851765937] [2024-06-21 21:22:33,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851765937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:33,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:33,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:33,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039684808] [2024-06-21 21:22:33,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:33,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:33,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:33,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:33,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:33,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:33,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 82 transitions, 639 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:33,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:33,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:33,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:34,016 INFO L124 PetriNetUnfolderBase]: 287/580 cut-off events. [2024-06-21 21:22:34,016 INFO L125 PetriNetUnfolderBase]: For 45878/45878 co-relation queries the response was YES. [2024-06-21 21:22:34,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4098 conditions, 580 events. 287/580 cut-off events. For 45878/45878 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2677 event pairs, 138 based on Foata normal form. 2/580 useless extension candidates. Maximal degree in co-relation 4042. Up to 511 conditions per place. [2024-06-21 21:22:34,019 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 73 selfloop transitions, 20 changer transitions 0/95 dead transitions. [2024-06-21 21:22:34,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 95 transitions, 865 flow [2024-06-21 21:22:34,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:22:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:22:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 21:22:34,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:22:34,020 INFO L175 Difference]: Start difference. First operand has 148 places, 82 transitions, 639 flow. Second operand 10 states and 110 transitions. [2024-06-21 21:22:34,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 95 transitions, 865 flow [2024-06-21 21:22:34,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 95 transitions, 805 flow, removed 7 selfloop flow, removed 14 redundant places. [2024-06-21 21:22:34,051 INFO L231 Difference]: Finished difference. Result has 132 places, 83 transitions, 637 flow [2024-06-21 21:22:34,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=637, PETRI_PLACES=132, PETRI_TRANSITIONS=83} [2024-06-21 21:22:34,051 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2024-06-21 21:22:34,052 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 83 transitions, 637 flow [2024-06-21 21:22:34,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:34,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:34,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:34,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 21:22:34,052 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)] === [2024-06-21 21:22:34,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:34,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1967108044, now seen corresponding path program 33 times [2024-06-21 21:22:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:34,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036577105] [2024-06-21 21:22:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:34,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:34,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:34,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036577105] [2024-06-21 21:22:34,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036577105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:34,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:34,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:34,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614005002] [2024-06-21 21:22:34,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:34,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:34,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:34,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:34,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:34,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:34,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 83 transitions, 637 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:34,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:34,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:34,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:35,195 INFO L124 PetriNetUnfolderBase]: 303/616 cut-off events. [2024-06-21 21:22:35,195 INFO L125 PetriNetUnfolderBase]: For 39924/39924 co-relation queries the response was YES. [2024-06-21 21:22:35,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3934 conditions, 616 events. 303/616 cut-off events. For 39924/39924 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2938 event pairs, 138 based on Foata normal form. 10/624 useless extension candidates. Maximal degree in co-relation 3884. Up to 466 conditions per place. [2024-06-21 21:22:35,198 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 60 selfloop transitions, 30 changer transitions 11/103 dead transitions. [2024-06-21 21:22:35,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 103 transitions, 911 flow [2024-06-21 21:22:35,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 21:22:35,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:22:35,199 INFO L175 Difference]: Start difference. First operand has 132 places, 83 transitions, 637 flow. Second operand 11 states and 132 transitions. [2024-06-21 21:22:35,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 103 transitions, 911 flow [2024-06-21 21:22:35,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 103 transitions, 863 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 21:22:35,222 INFO L231 Difference]: Finished difference. Result has 135 places, 80 transitions, 630 flow [2024-06-21 21:22:35,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=630, PETRI_PLACES=135, PETRI_TRANSITIONS=80} [2024-06-21 21:22:35,223 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-21 21:22:35,223 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 80 transitions, 630 flow [2024-06-21 21:22:35,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:35,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:35,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:35,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 21:22:35,223 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)] === [2024-06-21 21:22:35,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:35,223 INFO L85 PathProgramCache]: Analyzing trace with hash 889083538, now seen corresponding path program 34 times [2024-06-21 21:22:35,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:35,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061118659] [2024-06-21 21:22:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:35,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:36,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:36,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061118659] [2024-06-21 21:22:36,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061118659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:36,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:36,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:36,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908819864] [2024-06-21 21:22:36,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:36,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:36,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:36,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:36,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 80 transitions, 630 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:36,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:36,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:36,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:36,445 INFO L124 PetriNetUnfolderBase]: 291/596 cut-off events. [2024-06-21 21:22:36,445 INFO L125 PetriNetUnfolderBase]: For 40551/40551 co-relation queries the response was YES. [2024-06-21 21:22:36,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3901 conditions, 596 events. 291/596 cut-off events. For 40551/40551 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2822 event pairs, 128 based on Foata normal form. 8/602 useless extension candidates. Maximal degree in co-relation 3850. Up to 394 conditions per place. [2024-06-21 21:22:36,448 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 75 selfloop transitions, 20 changer transitions 8/105 dead transitions. [2024-06-21 21:22:36,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 105 transitions, 1020 flow [2024-06-21 21:22:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:36,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 21:22:36,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 21:22:36,449 INFO L175 Difference]: Start difference. First operand has 135 places, 80 transitions, 630 flow. Second operand 11 states and 131 transitions. [2024-06-21 21:22:36,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 105 transitions, 1020 flow [2024-06-21 21:22:36,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 105 transitions, 952 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:22:36,474 INFO L231 Difference]: Finished difference. Result has 133 places, 77 transitions, 588 flow [2024-06-21 21:22:36,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=588, PETRI_PLACES=133, PETRI_TRANSITIONS=77} [2024-06-21 21:22:36,474 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 103 predicate places. [2024-06-21 21:22:36,474 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 77 transitions, 588 flow [2024-06-21 21:22:36,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:36,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:36,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:36,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 21:22:36,475 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)] === [2024-06-21 21:22:36,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:36,475 INFO L85 PathProgramCache]: Analyzing trace with hash -765944514, now seen corresponding path program 6 times [2024-06-21 21:22:36,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:36,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312127618] [2024-06-21 21:22:36,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:36,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:37,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:37,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312127618] [2024-06-21 21:22:37,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312127618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:37,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:37,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:37,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253736685] [2024-06-21 21:22:37,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:37,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:37,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:37,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:37,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:37,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:37,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 77 transitions, 588 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:37,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:37,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:37,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:37,720 INFO L124 PetriNetUnfolderBase]: 276/563 cut-off events. [2024-06-21 21:22:37,720 INFO L125 PetriNetUnfolderBase]: For 34624/34624 co-relation queries the response was YES. [2024-06-21 21:22:37,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3740 conditions, 563 events. 276/563 cut-off events. For 34624/34624 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2592 event pairs, 126 based on Foata normal form. 2/563 useless extension candidates. Maximal degree in co-relation 3690. Up to 483 conditions per place. [2024-06-21 21:22:37,723 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 67 selfloop transitions, 22 changer transitions 0/91 dead transitions. [2024-06-21 21:22:37,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 91 transitions, 814 flow [2024-06-21 21:22:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:22:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:22:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 21:22:37,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:22:37,724 INFO L175 Difference]: Start difference. First operand has 133 places, 77 transitions, 588 flow. Second operand 10 states and 115 transitions. [2024-06-21 21:22:37,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 91 transitions, 814 flow [2024-06-21 21:22:37,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 91 transitions, 774 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 21:22:37,744 INFO L231 Difference]: Finished difference. Result has 129 places, 78 transitions, 612 flow [2024-06-21 21:22:37,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=612, PETRI_PLACES=129, PETRI_TRANSITIONS=78} [2024-06-21 21:22:37,745 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 99 predicate places. [2024-06-21 21:22:37,745 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 78 transitions, 612 flow [2024-06-21 21:22:37,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:37,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:37,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:37,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 21:22:37,745 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)] === [2024-06-21 21:22:37,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:37,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1466510912, now seen corresponding path program 35 times [2024-06-21 21:22:37,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:37,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750484227] [2024-06-21 21:22:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:37,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:38,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:38,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750484227] [2024-06-21 21:22:38,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750484227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:38,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:38,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:38,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408829549] [2024-06-21 21:22:38,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:38,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:38,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:38,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:38,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:38,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:38,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 78 transitions, 612 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:38,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:38,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:38,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:38,878 INFO L124 PetriNetUnfolderBase]: 278/573 cut-off events. [2024-06-21 21:22:38,878 INFO L125 PetriNetUnfolderBase]: For 33610/33610 co-relation queries the response was YES. [2024-06-21 21:22:38,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3556 conditions, 573 events. 278/573 cut-off events. For 33610/33610 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2697 event pairs, 138 based on Foata normal form. 10/581 useless extension candidates. Maximal degree in co-relation 3508. Up to 476 conditions per place. [2024-06-21 21:22:38,880 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 65 selfloop transitions, 17 changer transitions 12/96 dead transitions. [2024-06-21 21:22:38,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 96 transitions, 864 flow [2024-06-21 21:22:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 21:22:38,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-21 21:22:38,881 INFO L175 Difference]: Start difference. First operand has 129 places, 78 transitions, 612 flow. Second operand 11 states and 122 transitions. [2024-06-21 21:22:38,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 96 transitions, 864 flow [2024-06-21 21:22:38,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 96 transitions, 810 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 21:22:38,902 INFO L231 Difference]: Finished difference. Result has 132 places, 74 transitions, 568 flow [2024-06-21 21:22:38,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=568, PETRI_PLACES=132, PETRI_TRANSITIONS=74} [2024-06-21 21:22:38,902 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2024-06-21 21:22:38,902 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 74 transitions, 568 flow [2024-06-21 21:22:38,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:38,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:38,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:38,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 21:22:38,903 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)] === [2024-06-21 21:22:38,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:38,903 INFO L85 PathProgramCache]: Analyzing trace with hash 889298864, now seen corresponding path program 7 times [2024-06-21 21:22:38,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:38,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685381105] [2024-06-21 21:22:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:38,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:39,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:39,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685381105] [2024-06-21 21:22:39,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685381105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:39,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:39,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:39,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918888691] [2024-06-21 21:22:39,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:39,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:39,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:39,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:39,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:39,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:39,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 74 transitions, 568 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:39,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:39,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:39,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:40,056 INFO L124 PetriNetUnfolderBase]: 263/552 cut-off events. [2024-06-21 21:22:40,056 INFO L125 PetriNetUnfolderBase]: For 35012/35012 co-relation queries the response was YES. [2024-06-21 21:22:40,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3397 conditions, 552 events. 263/552 cut-off events. For 35012/35012 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2618 event pairs, 129 based on Foata normal form. 12/562 useless extension candidates. Maximal degree in co-relation 3348. Up to 435 conditions per place. [2024-06-21 21:22:40,059 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 63 selfloop transitions, 13 changer transitions 17/95 dead transitions. [2024-06-21 21:22:40,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 95 transitions, 842 flow [2024-06-21 21:22:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 21:22:40,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 21:22:40,059 INFO L175 Difference]: Start difference. First operand has 132 places, 74 transitions, 568 flow. Second operand 11 states and 128 transitions. [2024-06-21 21:22:40,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 95 transitions, 842 flow [2024-06-21 21:22:40,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 95 transitions, 804 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:22:40,083 INFO L231 Difference]: Finished difference. Result has 130 places, 68 transitions, 513 flow [2024-06-21 21:22:40,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=513, PETRI_PLACES=130, PETRI_TRANSITIONS=68} [2024-06-21 21:22:40,083 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2024-06-21 21:22:40,083 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 68 transitions, 513 flow [2024-06-21 21:22:40,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:40,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:40,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:40,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 21:22:40,083 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)] === [2024-06-21 21:22:40,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:40,084 INFO L85 PathProgramCache]: Analyzing trace with hash 896717474, now seen corresponding path program 8 times [2024-06-21 21:22:40,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:40,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518159138] [2024-06-21 21:22:40,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:40,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:40,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:40,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518159138] [2024-06-21 21:22:40,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518159138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:40,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:40,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:40,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948589381] [2024-06-21 21:22:40,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:40,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:40,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:40,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:40,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:41,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:41,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 68 transitions, 513 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:41,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:41,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:41,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:41,229 INFO L124 PetriNetUnfolderBase]: 225/478 cut-off events. [2024-06-21 21:22:41,230 INFO L125 PetriNetUnfolderBase]: For 25716/25716 co-relation queries the response was YES. [2024-06-21 21:22:41,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2974 conditions, 478 events. 225/478 cut-off events. For 25716/25716 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2153 event pairs, 122 based on Foata normal form. 2/478 useless extension candidates. Maximal degree in co-relation 2926. Up to 393 conditions per place. [2024-06-21 21:22:41,232 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 60 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-21 21:22:41,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 81 transitions, 703 flow [2024-06-21 21:22:41,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:22:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:22:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 21:22:41,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36451612903225805 [2024-06-21 21:22:41,233 INFO L175 Difference]: Start difference. First operand has 130 places, 68 transitions, 513 flow. Second operand 10 states and 113 transitions. [2024-06-21 21:22:41,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 81 transitions, 703 flow [2024-06-21 21:22:41,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 81 transitions, 673 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 21:22:41,255 INFO L231 Difference]: Finished difference. Result has 125 places, 68 transitions, 525 flow [2024-06-21 21:22:41,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=525, PETRI_PLACES=125, PETRI_TRANSITIONS=68} [2024-06-21 21:22:41,256 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2024-06-21 21:22:41,256 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 68 transitions, 525 flow [2024-06-21 21:22:41,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:41,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:41,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:41,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 21:22:41,256 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)] === [2024-06-21 21:22:41,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:41,256 INFO L85 PathProgramCache]: Analyzing trace with hash 896440768, now seen corresponding path program 36 times [2024-06-21 21:22:41,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:41,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222676381] [2024-06-21 21:22:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:41,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:42,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:42,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222676381] [2024-06-21 21:22:42,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222676381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:42,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:42,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:42,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094973919] [2024-06-21 21:22:42,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:42,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:42,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:42,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:42,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:42,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:42,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 68 transitions, 525 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:42,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:42,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:42,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:42,560 INFO L124 PetriNetUnfolderBase]: 227/488 cut-off events. [2024-06-21 21:22:42,560 INFO L125 PetriNetUnfolderBase]: For 26730/26730 co-relation queries the response was YES. [2024-06-21 21:22:42,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2833 conditions, 488 events. 227/488 cut-off events. For 26730/26730 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2213 event pairs, 126 based on Foata normal form. 10/496 useless extension candidates. Maximal degree in co-relation 2786. Up to 390 conditions per place. [2024-06-21 21:22:42,562 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 61 selfloop transitions, 13 changer transitions 11/87 dead transitions. [2024-06-21 21:22:42,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 87 transitions, 763 flow [2024-06-21 21:22:42,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:42,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 21:22:42,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 21:22:42,563 INFO L175 Difference]: Start difference. First operand has 125 places, 68 transitions, 525 flow. Second operand 11 states and 123 transitions. [2024-06-21 21:22:42,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 87 transitions, 763 flow [2024-06-21 21:22:42,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 87 transitions, 713 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 21:22:42,588 INFO L231 Difference]: Finished difference. Result has 128 places, 65 transitions, 478 flow [2024-06-21 21:22:42,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=478, PETRI_PLACES=128, PETRI_TRANSITIONS=65} [2024-06-21 21:22:42,588 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-21 21:22:42,588 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 65 transitions, 478 flow [2024-06-21 21:22:42,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:42,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:42,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:42,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 21:22:42,589 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)] === [2024-06-21 21:22:42,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:42,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1994749060, now seen corresponding path program 37 times [2024-06-21 21:22:42,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:42,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656549416] [2024-06-21 21:22:42,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:42,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:43,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:43,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656549416] [2024-06-21 21:22:43,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656549416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:43,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:43,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:43,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466291717] [2024-06-21 21:22:43,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:43,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:43,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:43,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:43,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:43,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:43,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 65 transitions, 478 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:43,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:43,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:43,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:43,774 INFO L124 PetriNetUnfolderBase]: 191/420 cut-off events. [2024-06-21 21:22:43,775 INFO L125 PetriNetUnfolderBase]: For 21763/21763 co-relation queries the response was YES. [2024-06-21 21:22:43,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2298 conditions, 420 events. 191/420 cut-off events. For 21763/21763 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1822 event pairs, 75 based on Foata normal form. 8/426 useless extension candidates. Maximal degree in co-relation 2250. Up to 289 conditions per place. [2024-06-21 21:22:43,776 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 50 selfloop transitions, 13 changer transitions 18/83 dead transitions. [2024-06-21 21:22:43,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 83 transitions, 698 flow [2024-06-21 21:22:43,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:22:43,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:22:43,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-21 21:22:43,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 21:22:43,781 INFO L175 Difference]: Start difference. First operand has 128 places, 65 transitions, 478 flow. Second operand 12 states and 128 transitions. [2024-06-21 21:22:43,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 83 transitions, 698 flow [2024-06-21 21:22:43,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 83 transitions, 657 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 21:22:43,804 INFO L231 Difference]: Finished difference. Result has 126 places, 58 transitions, 429 flow [2024-06-21 21:22:43,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=429, PETRI_PLACES=126, PETRI_TRANSITIONS=58} [2024-06-21 21:22:43,805 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2024-06-21 21:22:43,805 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 58 transitions, 429 flow [2024-06-21 21:22:43,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:43,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:43,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:43,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 21:22:43,806 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)] === [2024-06-21 21:22:43,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:43,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1320784414, now seen corresponding path program 38 times [2024-06-21 21:22:43,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:43,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227855915] [2024-06-21 21:22:43,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:43,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:44,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:44,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227855915] [2024-06-21 21:22:44,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227855915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:44,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:44,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:44,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251679308] [2024-06-21 21:22:44,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:44,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:44,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:44,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:44,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:44,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:44,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 58 transitions, 429 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:44,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:44,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:44,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:44,994 INFO L124 PetriNetUnfolderBase]: 153/336 cut-off events. [2024-06-21 21:22:44,994 INFO L125 PetriNetUnfolderBase]: For 15722/15722 co-relation queries the response was YES. [2024-06-21 21:22:44,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1721 conditions, 336 events. 153/336 cut-off events. For 15722/15722 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1354 event pairs, 57 based on Foata normal form. 8/342 useless extension candidates. Maximal degree in co-relation 1675. Up to 230 conditions per place. [2024-06-21 21:22:44,996 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 41 selfloop transitions, 8 changer transitions 23/74 dead transitions. [2024-06-21 21:22:44,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 74 transitions, 611 flow [2024-06-21 21:22:44,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:22:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:22:44,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 123 transitions. [2024-06-21 21:22:44,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33064516129032256 [2024-06-21 21:22:44,996 INFO L175 Difference]: Start difference. First operand has 126 places, 58 transitions, 429 flow. Second operand 12 states and 123 transitions. [2024-06-21 21:22:44,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 74 transitions, 611 flow [2024-06-21 21:22:45,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 74 transitions, 538 flow, removed 8 selfloop flow, removed 15 redundant places. [2024-06-21 21:22:45,008 INFO L231 Difference]: Finished difference. Result has 112 places, 48 transitions, 320 flow [2024-06-21 21:22:45,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=320, PETRI_PLACES=112, PETRI_TRANSITIONS=48} [2024-06-21 21:22:45,009 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-06-21 21:22:45,009 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 48 transitions, 320 flow [2024-06-21 21:22:45,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:45,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:45,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:45,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 21:22:45,009 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)] === [2024-06-21 21:22:45,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:45,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1606654719, now seen corresponding path program 1 times [2024-06-21 21:22:45,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:45,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446368576] [2024-06-21 21:22:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:45,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:46,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:46,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446368576] [2024-06-21 21:22:46,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446368576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:46,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:46,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:22:46,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612683014] [2024-06-21 21:22:46,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:46,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:22:46,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:46,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:22:46,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:22:46,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:46,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 48 transitions, 320 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:46,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:46,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:46,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:46,590 INFO L124 PetriNetUnfolderBase]: 137/296 cut-off events. [2024-06-21 21:22:46,590 INFO L125 PetriNetUnfolderBase]: For 10851/10851 co-relation queries the response was YES. [2024-06-21 21:22:46,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1427 conditions, 296 events. 137/296 cut-off events. For 10851/10851 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1142 event pairs, 52 based on Foata normal form. 6/301 useless extension candidates. Maximal degree in co-relation 1386. Up to 232 conditions per place. [2024-06-21 21:22:46,591 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 38 selfloop transitions, 6 changer transitions 16/62 dead transitions. [2024-06-21 21:22:46,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 62 transitions, 474 flow [2024-06-21 21:22:46,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:46,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:46,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-21 21:22:46,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3196480938416422 [2024-06-21 21:22:46,592 INFO L175 Difference]: Start difference. First operand has 112 places, 48 transitions, 320 flow. Second operand 11 states and 109 transitions. [2024-06-21 21:22:46,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 62 transitions, 474 flow [2024-06-21 21:22:46,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 62 transitions, 425 flow, removed 10 selfloop flow, removed 15 redundant places. [2024-06-21 21:22:46,598 INFO L231 Difference]: Finished difference. Result has 92 places, 43 transitions, 255 flow [2024-06-21 21:22:46,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=255, PETRI_PLACES=92, PETRI_TRANSITIONS=43} [2024-06-21 21:22:46,599 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2024-06-21 21:22:46,599 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 43 transitions, 255 flow [2024-06-21 21:22:46,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:46,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:46,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:46,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 21:22:46,599 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)] === [2024-06-21 21:22:46,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:46,599 INFO L85 PathProgramCache]: Analyzing trace with hash -294844877, now seen corresponding path program 2 times [2024-06-21 21:22:46,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:46,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061509080] [2024-06-21 21:22:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:46,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:47,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:47,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061509080] [2024-06-21 21:22:47,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061509080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:47,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:47,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:22:47,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549929953] [2024-06-21 21:22:47,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:47,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:22:47,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:47,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:22:47,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:22:47,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:47,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 43 transitions, 255 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:47,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:47,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:47,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:47,850 INFO L124 PetriNetUnfolderBase]: 124/269 cut-off events. [2024-06-21 21:22:47,851 INFO L125 PetriNetUnfolderBase]: For 6360/6360 co-relation queries the response was YES. [2024-06-21 21:22:47,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1165 conditions, 269 events. 124/269 cut-off events. For 6360/6360 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1010 event pairs, 48 based on Foata normal form. 6/274 useless extension candidates. Maximal degree in co-relation 1132. Up to 200 conditions per place. [2024-06-21 21:22:47,852 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 33 selfloop transitions, 8 changer transitions 14/57 dead transitions. [2024-06-21 21:22:47,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 57 transitions, 395 flow [2024-06-21 21:22:47,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-21 21:22:47,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3196480938416422 [2024-06-21 21:22:47,852 INFO L175 Difference]: Start difference. First operand has 92 places, 43 transitions, 255 flow. Second operand 11 states and 109 transitions. [2024-06-21 21:22:47,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 57 transitions, 395 flow [2024-06-21 21:22:47,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 57 transitions, 375 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 21:22:47,858 INFO L231 Difference]: Finished difference. Result has 85 places, 39 transitions, 235 flow [2024-06-21 21:22:47,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=74, 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=235, PETRI_PLACES=85, PETRI_TRANSITIONS=39} [2024-06-21 21:22:47,858 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2024-06-21 21:22:47,858 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 39 transitions, 235 flow [2024-06-21 21:22:47,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:47,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:47,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:47,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 21:22:47,858 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)] === [2024-06-21 21:22:47,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:47,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2028150451, now seen corresponding path program 3 times [2024-06-21 21:22:47,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:47,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528044721] [2024-06-21 21:22:47,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:47,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:49,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:49,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528044721] [2024-06-21 21:22:49,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528044721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:49,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:49,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:22:49,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043869373] [2024-06-21 21:22:49,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:49,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:22:49,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:49,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:22:49,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:22:49,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:49,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 39 transitions, 235 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:49,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:49,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:49,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:49,485 INFO L124 PetriNetUnfolderBase]: 95/210 cut-off events. [2024-06-21 21:22:49,486 INFO L125 PetriNetUnfolderBase]: For 3640/3640 co-relation queries the response was YES. [2024-06-21 21:22:49,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 210 events. 95/210 cut-off events. For 3640/3640 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 703 event pairs, 33 based on Foata normal form. 6/215 useless extension candidates. Maximal degree in co-relation 822. Up to 143 conditions per place. [2024-06-21 21:22:49,486 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 32 selfloop transitions, 8 changer transitions 11/53 dead transitions. [2024-06-21 21:22:49,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 53 transitions, 371 flow [2024-06-21 21:22:49,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:49,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-21 21:22:49,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31671554252199413 [2024-06-21 21:22:49,492 INFO L175 Difference]: Start difference. First operand has 85 places, 39 transitions, 235 flow. Second operand 11 states and 108 transitions. [2024-06-21 21:22:49,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 53 transitions, 371 flow [2024-06-21 21:22:49,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 53 transitions, 347 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:22:49,495 INFO L231 Difference]: Finished difference. Result has 79 places, 36 transitions, 211 flow [2024-06-21 21:22:49,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=211, PETRI_PLACES=79, PETRI_TRANSITIONS=36} [2024-06-21 21:22:49,496 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2024-06-21 21:22:49,496 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 36 transitions, 211 flow [2024-06-21 21:22:49,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:49,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:49,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:49,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 21:22:49,496 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)] === [2024-06-21 21:22:49,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:49,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2028438751, now seen corresponding path program 4 times [2024-06-21 21:22:49,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:49,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701902754] [2024-06-21 21:22:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:49,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:50,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:50,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701902754] [2024-06-21 21:22:50,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701902754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:50,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:50,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:22:50,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918172146] [2024-06-21 21:22:50,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:50,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:22:50,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:50,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:22:50,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:22:50,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:50,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 36 transitions, 211 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:50,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:50,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:50,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:51,077 INFO L124 PetriNetUnfolderBase]: 70/159 cut-off events. [2024-06-21 21:22:51,077 INFO L125 PetriNetUnfolderBase]: For 1792/1792 co-relation queries the response was YES. [2024-06-21 21:22:51,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 159 events. 70/159 cut-off events. For 1792/1792 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 451 event pairs, 18 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 550. Up to 92 conditions per place. [2024-06-21 21:22:51,078 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 26 selfloop transitions, 4 changer transitions 18/50 dead transitions. [2024-06-21 21:22:51,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 50 transitions, 339 flow [2024-06-21 21:22:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 107 transitions. [2024-06-21 21:22:51,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31378299120234604 [2024-06-21 21:22:51,079 INFO L175 Difference]: Start difference. First operand has 79 places, 36 transitions, 211 flow. Second operand 11 states and 107 transitions. [2024-06-21 21:22:51,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 50 transitions, 339 flow [2024-06-21 21:22:51,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 50 transitions, 317 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:22:51,080 INFO L231 Difference]: Finished difference. Result has 72 places, 30 transitions, 170 flow [2024-06-21 21:22:51,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=170, PETRI_PLACES=72, PETRI_TRANSITIONS=30} [2024-06-21 21:22:51,081 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-21 21:22:51,081 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 30 transitions, 170 flow [2024-06-21 21:22:51,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:51,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:51,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:51,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 21:22:51,081 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)] === [2024-06-21 21:22:51,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:51,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2068148703, now seen corresponding path program 5 times [2024-06-21 21:22:51,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:51,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027407117] [2024-06-21 21:22:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:51,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:52,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:52,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027407117] [2024-06-21 21:22:52,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027407117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:52,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:52,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:22:52,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418774846] [2024-06-21 21:22:52,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:52,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:22:52,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:52,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:22:52,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:22:52,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:52,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 30 transitions, 170 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:52,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:52,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:52,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:52,738 INFO L124 PetriNetUnfolderBase]: 56/129 cut-off events. [2024-06-21 21:22:52,738 INFO L125 PetriNetUnfolderBase]: For 1398/1398 co-relation queries the response was YES. [2024-06-21 21:22:52,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469 conditions, 129 events. 56/129 cut-off events. For 1398/1398 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 328 event pairs, 16 based on Foata normal form. 6/134 useless extension candidates. Maximal degree in co-relation 444. Up to 54 conditions per place. [2024-06-21 21:22:52,738 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 19 selfloop transitions, 9 changer transitions 13/43 dead transitions. [2024-06-21 21:22:52,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 43 transitions, 282 flow [2024-06-21 21:22:52,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:52,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:52,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2024-06-21 21:22:52,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30498533724340177 [2024-06-21 21:22:52,739 INFO L175 Difference]: Start difference. First operand has 72 places, 30 transitions, 170 flow. Second operand 11 states and 104 transitions. [2024-06-21 21:22:52,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 43 transitions, 282 flow [2024-06-21 21:22:52,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 43 transitions, 264 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 21:22:52,740 INFO L231 Difference]: Finished difference. Result has 62 places, 25 transitions, 141 flow [2024-06-21 21:22:52,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=141, PETRI_PLACES=62, PETRI_TRANSITIONS=25} [2024-06-21 21:22:52,740 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2024-06-21 21:22:52,741 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 25 transitions, 141 flow [2024-06-21 21:22:52,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:52,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:52,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:52,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 21:22:52,741 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)] === [2024-06-21 21:22:52,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:52,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1368845055, now seen corresponding path program 6 times [2024-06-21 21:22:52,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:52,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214052218] [2024-06-21 21:22:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:52,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:53,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:53,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214052218] [2024-06-21 21:22:53,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214052218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:53,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:53,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:22:53,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040421964] [2024-06-21 21:22:53,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:53,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:22:53,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:53,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:22:53,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:22:54,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:22:54,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 25 transitions, 141 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:54,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:54,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:22:54,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:54,269 INFO L124 PetriNetUnfolderBase]: 28/73 cut-off events. [2024-06-21 21:22:54,269 INFO L125 PetriNetUnfolderBase]: For 422/422 co-relation queries the response was YES. [2024-06-21 21:22:54,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 73 events. 28/73 cut-off events. For 422/422 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 112 event pairs, 1 based on Foata normal form. 6/78 useless extension candidates. Maximal degree in co-relation 216. Up to 24 conditions per place. [2024-06-21 21:22:54,270 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2024-06-21 21:22:54,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 33 transitions, 197 flow [2024-06-21 21:22:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 96 transitions. [2024-06-21 21:22:54,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28152492668621704 [2024-06-21 21:22:54,270 INFO L175 Difference]: Start difference. First operand has 62 places, 25 transitions, 141 flow. Second operand 11 states and 96 transitions. [2024-06-21 21:22:54,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 33 transitions, 197 flow [2024-06-21 21:22:54,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 33 transitions, 155 flow, removed 1 selfloop flow, removed 17 redundant places. [2024-06-21 21:22:54,271 INFO L231 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2024-06-21 21:22:54,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=49, PETRI_TRANSITIONS=0} [2024-06-21 21:22:54,271 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2024-06-21 21:22:54,271 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2024-06-21 21:22:54,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:54,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 21:22:54,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 21:22:54,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 21:22:54,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 21:22:54,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 21:22:54,276 INFO L445 BasicCegarLoop]: Path program histogram: [38, 23, 20, 13, 11, 8, 8, 6, 5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:54,278 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 21:22:54,278 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 21:22:54,281 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 21:22:54,281 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 21:22:54,282 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 09:22:54 BasicIcfg [2024-06-21 21:22:54,282 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 21:22:54,282 INFO L158 Benchmark]: Toolchain (without parser) took 201662.89ms. Allocated memory was 144.7MB in the beginning and 1.1GB in the end (delta: 973.1MB). Free memory was 110.3MB in the beginning and 982.9MB in the end (delta: -872.6MB). Peak memory consumption was 100.2MB. Max. memory is 16.1GB. [2024-06-21 21:22:54,282 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 144.7MB. Free memory is still 102.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 21:22:54,283 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 144.7MB. Free memory is still 115.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 21:22:54,283 INFO L158 Benchmark]: CACSL2BoogieTranslator took 513.88ms. Allocated memory is still 144.7MB. Free memory was 110.0MB in the beginning and 76.7MB in the end (delta: 33.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-06-21 21:22:54,283 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.95ms. Allocated memory is still 144.7MB. Free memory was 76.7MB in the beginning and 73.9MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 21:22:54,283 INFO L158 Benchmark]: Boogie Preprocessor took 34.79ms. Allocated memory is still 144.7MB. Free memory was 73.9MB in the beginning and 70.9MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 21:22:54,283 INFO L158 Benchmark]: RCFGBuilder took 568.02ms. Allocated memory is still 144.7MB. Free memory was 70.5MB in the beginning and 90.7MB in the end (delta: -20.3MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2024-06-21 21:22:54,283 INFO L158 Benchmark]: TraceAbstraction took 200494.68ms. Allocated memory was 144.7MB in the beginning and 1.1GB in the end (delta: 973.1MB). Free memory was 90.1MB in the beginning and 982.9MB in the end (delta: -892.8MB). Peak memory consumption was 80.3MB. Max. memory is 16.1GB. [2024-06-21 21:22:54,284 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 144.7MB. Free memory is still 102.0MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.14ms. Allocated memory is still 144.7MB. Free memory is still 115.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 513.88ms. Allocated memory is still 144.7MB. Free memory was 110.0MB in the beginning and 76.7MB in the end (delta: 33.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.95ms. Allocated memory is still 144.7MB. Free memory was 76.7MB in the beginning and 73.9MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.79ms. Allocated memory is still 144.7MB. Free memory was 73.9MB in the beginning and 70.9MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 568.02ms. Allocated memory is still 144.7MB. Free memory was 70.5MB in the beginning and 90.7MB in the end (delta: -20.3MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * TraceAbstraction took 200494.68ms. Allocated memory was 144.7MB in the beginning and 1.1GB in the end (delta: 973.1MB). Free memory was 90.1MB in the beginning and 982.9MB in the end (delta: -892.8MB). Peak memory consumption was 80.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 818]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 819]: 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: 200.4s, OverallIterations: 163, TraceHistogramMax: 1, PathProgramHistogramMax: 38, EmptinessCheckTime: 0.0s, AutomataDifference: 84.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11204 SdHoareTripleChecker+Valid, 35.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9405 mSDsluCounter, 9910 SdHoareTripleChecker+Invalid, 30.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8807 mSDsCounter, 2561 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 59538 IncrementalHoareTripleChecker+Invalid, 62099 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2561 mSolverCounterUnsat, 1103 mSDtfsCounter, 59538 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1791 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1790 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3760 ImplicationChecksByTransitivity, 46.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2800occurred in iteration=89, InterpolantAutomatonStates: 1606, 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, 0.7s SatisfiabilityAnalysisTime, 114.0s InterpolantComputationTime, 2657 NumberOfCodeBlocks, 2657 NumberOfCodeBlocksAsserted, 163 NumberOfCheckSat, 2494 ConstructedInterpolants, 0 QuantifiedInterpolants, 113646 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 163 InterpolantComputations, 163 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 21:22:54,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE