./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi008.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/protection/rfi008.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/rfi008.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/rfi008.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-7724a2d-m [2024-06-27 20:44:37,790 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:44:37,887 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:44:37,891 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:44:37,892 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:44:37,908 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:44:37,909 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:44:37,909 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:44:37,910 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:44:37,910 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:44:37,910 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:44:37,911 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:44:37,911 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:44:37,912 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:44:37,912 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:44:37,913 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:44:37,913 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:44:37,913 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:44:37,914 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:44:37,914 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:44:37,914 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:44:37,915 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:44:37,915 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:44:37,916 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:44:37,916 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:44:37,917 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:44:37,917 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:44:37,917 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:44:37,918 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:44:37,918 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:44:37,918 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:44:37,919 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:44:37,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:44:37,920 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:44:37,920 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:44:37,920 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:44:37,921 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:44:37,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:44:37,921 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:44:37,922 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:44:37,922 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:44:37,923 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:44:37,923 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:44:37,923 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:44:38,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:44:38,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:44:38,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:44:38,166 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:44:38,166 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:44:38,167 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi008.oepc.i [2024-06-27 20:44:39,259 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:44:39,538 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:44:39,538 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi008.oepc.i [2024-06-27 20:44:39,561 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94d355e84/8ef91288107d45f39f15ce197077a27f/FLAG127effa18 [2024-06-27 20:44:39,574 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94d355e84/8ef91288107d45f39f15ce197077a27f [2024-06-27 20:44:39,577 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:44:39,578 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:44:39,578 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi008.oepc.yml/witness.yml [2024-06-27 20:44:39,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:44:39,706 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:44:39,707 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:44:39,707 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:44:39,712 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:44:39,712 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:44:39" (1/2) ... [2024-06-27 20:44:39,713 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7949cd06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:44:39, skipping insertion in model container [2024-06-27 20:44:39,714 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:44:39" (1/2) ... [2024-06-27 20:44:39,715 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@577a24b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:44:39, skipping insertion in model container [2024-06-27 20:44:39,715 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:44:39" (2/2) ... [2024-06-27 20:44:39,716 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7949cd06 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:44:39, skipping insertion in model container [2024-06-27 20:44:39,716 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:44:39" (2/2) ... [2024-06-27 20:44:39,716 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:44:39,794 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:44:39,796 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 20:44:39,796 INFO L97 edCorrectnessWitness]: Location invariant before [L835-L835] ((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 20:44:39,796 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:44:39,797 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-27 20:44:39,853 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:44:40,273 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:44:40,282 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:44:40,392 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:44:40,429 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:44:40,430 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:44:40 WrapperNode [2024-06-27 20:44:40,430 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:44:40,431 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:44:40,431 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:44:40,431 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:44:40,437 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 27.06 08:44:40" (1/1) ... [2024-06-27 20:44:40,455 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 27.06 08:44:40" (1/1) ... [2024-06-27 20:44:40,481 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 137 [2024-06-27 20:44:40,482 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:44:40,483 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:44:40,483 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:44:40,483 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:44:40,493 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:44:40" (1/1) ... [2024-06-27 20:44:40,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:44:40" (1/1) ... [2024-06-27 20:44:40,497 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:44:40" (1/1) ... [2024-06-27 20:44:40,511 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]. [2024-06-27 20:44:40,511 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:44:40" (1/1) ... [2024-06-27 20:44:40,512 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:44:40" (1/1) ... [2024-06-27 20:44:40,520 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:44:40" (1/1) ... [2024-06-27 20:44:40,522 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:44:40" (1/1) ... [2024-06-27 20:44:40,524 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:44:40" (1/1) ... [2024-06-27 20:44:40,525 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:44:40" (1/1) ... [2024-06-27 20:44:40,529 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:44:40,530 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:44:40,530 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:44:40,530 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:44:40,531 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:44:40" (1/1) ... [2024-06-27 20:44:40,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:44:40,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:44:40,562 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) [2024-06-27 20:44:40,589 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 [2024-06-27 20:44:40,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:44:40,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:44:40,607 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:44:40,608 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:44:40,608 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:44:40,608 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:44:40,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:44:40,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:44:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:44:40,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:44:40,610 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:44:40,771 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:44:40,773 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:44:41,119 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:44:41,119 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:44:41,283 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:44:41,283 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:44:41,285 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:44:41 BoogieIcfgContainer [2024-06-27 20:44:41,285 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:44:41,289 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:44:41,289 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:44:41,292 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:44:41,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:44:39" (1/4) ... [2024-06-27 20:44:41,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5ba911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:44:41, skipping insertion in model container [2024-06-27 20:44:41,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:44:39" (2/4) ... [2024-06-27 20:44:41,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5ba911 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:44:41, skipping insertion in model container [2024-06-27 20:44:41,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:44:40" (3/4) ... [2024-06-27 20:44:41,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5ba911 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:44:41, skipping insertion in model container [2024-06-27 20:44:41,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:44:41" (4/4) ... [2024-06-27 20:44:41,301 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi008.oepc.i [2024-06-27 20:44:41,318 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:44:41,318 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-27 20:44:41,318 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:44:41,368 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:44:41,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-27 20:44:41,435 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-27 20:44:41,436 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:44:41,437 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 43 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. [2024-06-27 20:44:41,438 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-27 20:44:41,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-27 20:44:41,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:44:41,483 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;@7294bab0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:44:41,484 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 20:44:41,490 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:44:41,490 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 20:44:41,490 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:44:41,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:41,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:44:41,491 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)] === [2024-06-27 20:44:41,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:41,496 INFO L85 PathProgramCache]: Analyzing trace with hash 368677949, now seen corresponding path program 1 times [2024-06-27 20:44:41,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:41,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524206982] [2024-06-27 20:44:41,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:41,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:42,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:42,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524206982] [2024-06-27 20:44:42,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524206982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:42,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:42,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:44:42,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105456025] [2024-06-27 20:44:42,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:42,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:44:42,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:42,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:44:42,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:44:42,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-27 20:44:42,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:42,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:42,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-27 20:44:42,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:42,845 INFO L124 PetriNetUnfolderBase]: 162/309 cut-off events. [2024-06-27 20:44:42,845 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-27 20:44:42,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 309 events. 162/309 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1182 event pairs, 97 based on Foata normal form. 1/302 useless extension candidates. Maximal degree in co-relation 609. Up to 288 conditions per place. [2024-06-27 20:44:42,852 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 21 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-27 20:44:42,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 115 flow [2024-06-27 20:44:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:44:42,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:44:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-06-27 20:44:42,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6021505376344086 [2024-06-27 20:44:42,866 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 56 transitions. [2024-06-27 20:44:42,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 115 flow [2024-06-27 20:44:42,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 20:44:42,871 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-27 20:44:42,873 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} [2024-06-27 20:44:42,876 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-27 20:44:42,876 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-27 20:44:42,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:42,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:42,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:42,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:44:42,877 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)] === [2024-06-27 20:44:42,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:42,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2112218588, now seen corresponding path program 1 times [2024-06-27 20:44:42,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:42,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060434003] [2024-06-27 20:44:42,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:42,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:43,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:43,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060434003] [2024-06-27 20:44:43,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060434003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:43,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:43,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:44:43,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079639289] [2024-06-27 20:44:43,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:43,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:44:43,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:43,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:44:43,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:44:43,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-27 20:44:43,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:43,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:43,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-27 20:44:43,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:43,580 INFO L124 PetriNetUnfolderBase]: 159/306 cut-off events. [2024-06-27 20:44:43,580 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-06-27 20:44:43,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 306 events. 159/306 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1173 event pairs, 79 based on Foata normal form. 2/306 useless extension candidates. Maximal degree in co-relation 682. Up to 274 conditions per place. [2024-06-27 20:44:43,583 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 25 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-27 20:44:43,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 157 flow [2024-06-27 20:44:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:44:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:44:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-06-27 20:44:43,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-27 20:44:43,586 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 72 transitions. [2024-06-27 20:44:43,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 157 flow [2024-06-27 20:44:43,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:44:43,587 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-27 20:44:43,588 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} [2024-06-27 20:44:43,588 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-27 20:44:43,589 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-27 20:44:43,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:43,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:43,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:43,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:44:43,590 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)] === [2024-06-27 20:44:43,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:43,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1054267720, now seen corresponding path program 1 times [2024-06-27 20:44:43,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:43,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362363619] [2024-06-27 20:44:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:43,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:44,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:44,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362363619] [2024-06-27 20:44:44,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362363619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:44,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:44,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:44:44,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40160632] [2024-06-27 20:44:44,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:44,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:44:44,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:44,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:44:44,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:44:44,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-27 20:44:44,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:44,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:44,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-27 20:44:44,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:44,696 INFO L124 PetriNetUnfolderBase]: 153/300 cut-off events. [2024-06-27 20:44:44,697 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2024-06-27 20:44:44,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 300 events. 153/300 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1128 event pairs, 43 based on Foata normal form. 4/302 useless extension candidates. Maximal degree in co-relation 733. Up to 246 conditions per place. [2024-06-27 20:44:44,701 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 30 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2024-06-27 20:44:44,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 42 transitions, 209 flow [2024-06-27 20:44:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:44:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:44:44,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 20:44:44,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5741935483870968 [2024-06-27 20:44:44,706 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 89 transitions. [2024-06-27 20:44:44,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 42 transitions, 209 flow [2024-06-27 20:44:44,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 200 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 20:44:44,710 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 119 flow [2024-06-27 20:44:44,711 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=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-06-27 20:44:44,712 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-06-27 20:44:44,712 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 119 flow [2024-06-27 20:44:44,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:44,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:44,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:44,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:44:44,714 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:44:44,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash -905032760, now seen corresponding path program 1 times [2024-06-27 20:44:44,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:44,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87042981] [2024-06-27 20:44:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:44,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:45,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:45,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87042981] [2024-06-27 20:44:45,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87042981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:45,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:45,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:44:45,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402973379] [2024-06-27 20:44:45,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:45,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:44:45,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:45,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:44:45,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:44:45,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:44:45,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:45,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:45,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:44:45,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:45,593 INFO L124 PetriNetUnfolderBase]: 211/379 cut-off events. [2024-06-27 20:44:45,594 INFO L125 PetriNetUnfolderBase]: For 353/353 co-relation queries the response was YES. [2024-06-27 20:44:45,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1053 conditions, 379 events. 211/379 cut-off events. For 353/353 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1339 event pairs, 92 based on Foata normal form. 1/378 useless extension candidates. Maximal degree in co-relation 1037. Up to 368 conditions per place. [2024-06-27 20:44:45,596 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 28 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2024-06-27 20:44:45,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 205 flow [2024-06-27 20:44:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:44:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:44:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-06-27 20:44:45,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-27 20:44:45,598 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 119 flow. Second operand 5 states and 61 transitions. [2024-06-27 20:44:45,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 205 flow [2024-06-27 20:44:45,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 190 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 20:44:45,601 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 131 flow [2024-06-27 20:44:45,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2024-06-27 20:44:45,602 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2024-06-27 20:44:45,602 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 131 flow [2024-06-27 20:44:45,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:45,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:45,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:45,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:44:45,603 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)] === [2024-06-27 20:44:45,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:45,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1405231846, now seen corresponding path program 1 times [2024-06-27 20:44:45,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:45,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859460224] [2024-06-27 20:44:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:46,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:46,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859460224] [2024-06-27 20:44:46,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859460224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:46,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:46,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:44:46,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46520385] [2024-06-27 20:44:46,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:46,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:44:46,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:46,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:44:46,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:44:47,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-27 20:44:47,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 131 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:47,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:47,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-27 20:44:47,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:47,251 INFO L124 PetriNetUnfolderBase]: 190/354 cut-off events. [2024-06-27 20:44:47,251 INFO L125 PetriNetUnfolderBase]: For 526/526 co-relation queries the response was YES. [2024-06-27 20:44:47,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1019 conditions, 354 events. 190/354 cut-off events. For 526/526 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1260 event pairs, 34 based on Foata normal form. 4/356 useless extension candidates. Maximal degree in co-relation 1002. Up to 272 conditions per place. [2024-06-27 20:44:47,254 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 36 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2024-06-27 20:44:47,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 267 flow [2024-06-27 20:44:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:47,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 20:44:47,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069124423963134 [2024-06-27 20:44:47,256 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 131 flow. Second operand 7 states and 110 transitions. [2024-06-27 20:44:47,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 267 flow [2024-06-27 20:44:47,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 256 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 20:44:47,259 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 147 flow [2024-06-27 20:44:47,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=147, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2024-06-27 20:44:47,260 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-06-27 20:44:47,260 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 147 flow [2024-06-27 20:44:47,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:47,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:47,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:47,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:44:47,261 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)] === [2024-06-27 20:44:47,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:47,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2008756451, now seen corresponding path program 1 times [2024-06-27 20:44:47,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:47,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741876931] [2024-06-27 20:44:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:47,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:47,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:47,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741876931] [2024-06-27 20:44:47,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741876931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:47,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:47,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:44:47,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658287607] [2024-06-27 20:44:47,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:47,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:44:47,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:47,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:44:47,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:44:47,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:44:47,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 147 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) [2024-06-27 20:44:47,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:47,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:44:47,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:48,215 INFO L124 PetriNetUnfolderBase]: 201/362 cut-off events. [2024-06-27 20:44:48,215 INFO L125 PetriNetUnfolderBase]: For 701/701 co-relation queries the response was YES. [2024-06-27 20:44:48,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 362 events. 201/362 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1234 event pairs, 67 based on Foata normal form. 3/363 useless extension candidates. Maximal degree in co-relation 1114. Up to 342 conditions per place. [2024-06-27 20:44:48,219 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 32 selfloop transitions, 8 changer transitions 0/42 dead transitions. [2024-06-27 20:44:48,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 253 flow [2024-06-27 20:44:48,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:44:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:44:48,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-06-27 20:44:48,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-27 20:44:48,221 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 147 flow. Second operand 6 states and 71 transitions. [2024-06-27 20:44:48,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 253 flow [2024-06-27 20:44:48,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 231 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:48,227 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 158 flow [2024-06-27 20:44:48,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2024-06-27 20:44:48,229 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-06-27 20:44:48,229 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 158 flow [2024-06-27 20:44:48,230 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) [2024-06-27 20:44:48,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:48,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:48,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:44:48,230 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)] === [2024-06-27 20:44:48,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:48,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1272980517, now seen corresponding path program 1 times [2024-06-27 20:44:48,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:48,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996287749] [2024-06-27 20:44:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:48,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:48,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:48,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996287749] [2024-06-27 20:44:48,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996287749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:48,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:48,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:44:48,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445422545] [2024-06-27 20:44:48,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:48,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:44:48,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:48,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:44:48,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:44:48,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:44:48,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 158 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) [2024-06-27 20:44:48,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:48,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:44:48,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:49,158 INFO L124 PetriNetUnfolderBase]: 204/367 cut-off events. [2024-06-27 20:44:49,158 INFO L125 PetriNetUnfolderBase]: For 854/854 co-relation queries the response was YES. [2024-06-27 20:44:49,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1202 conditions, 367 events. 204/367 cut-off events. For 854/854 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1261 event pairs, 67 based on Foata normal form. 1/366 useless extension candidates. Maximal degree in co-relation 1181. Up to 340 conditions per place. [2024-06-27 20:44:49,161 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 35 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2024-06-27 20:44:49,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 302 flow [2024-06-27 20:44:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:44:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:44:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 75 transitions. [2024-06-27 20:44:49,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-27 20:44:49,162 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 158 flow. Second operand 6 states and 75 transitions. [2024-06-27 20:44:49,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 302 flow [2024-06-27 20:44:49,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 48 transitions, 285 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:49,165 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 188 flow [2024-06-27 20:44:49,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-06-27 20:44:49,165 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-27 20:44:49,166 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 188 flow [2024-06-27 20:44:49,166 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) [2024-06-27 20:44:49,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:49,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:49,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:44:49,167 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)] === [2024-06-27 20:44:49,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:49,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1265593527, now seen corresponding path program 2 times [2024-06-27 20:44:49,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:49,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567999280] [2024-06-27 20:44:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:49,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:49,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:49,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567999280] [2024-06-27 20:44:49,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567999280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:49,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:49,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:44:49,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993716581] [2024-06-27 20:44:49,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:49,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:44:49,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:49,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:44:49,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:44:49,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:44:49,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 188 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) [2024-06-27 20:44:49,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:49,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:44:49,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:49,979 INFO L124 PetriNetUnfolderBase]: 202/364 cut-off events. [2024-06-27 20:44:49,979 INFO L125 PetriNetUnfolderBase]: For 1087/1087 co-relation queries the response was YES. [2024-06-27 20:44:49,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1255 conditions, 364 events. 202/364 cut-off events. For 1087/1087 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1250 event pairs, 66 based on Foata normal form. 1/363 useless extension candidates. Maximal degree in co-relation 1233. Up to 350 conditions per place. [2024-06-27 20:44:49,982 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 34 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2024-06-27 20:44:49,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 286 flow [2024-06-27 20:44:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:44:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:44:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2024-06-27 20:44:49,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-27 20:44:49,985 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 188 flow. Second operand 6 states and 69 transitions. [2024-06-27 20:44:49,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 286 flow [2024-06-27 20:44:49,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 274 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 20:44:49,988 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 197 flow [2024-06-27 20:44:49,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2024-06-27 20:44:49,995 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2024-06-27 20:44:49,995 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 197 flow [2024-06-27 20:44:49,996 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) [2024-06-27 20:44:49,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:49,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:49,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:44:49,998 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)] === [2024-06-27 20:44:49,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:49,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1502645367, now seen corresponding path program 1 times [2024-06-27 20:44:49,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:49,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347904714] [2024-06-27 20:44:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:49,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:51,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:51,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347904714] [2024-06-27 20:44:51,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347904714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:51,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:51,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:51,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845709704] [2024-06-27 20:44:51,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:51,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:51,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:51,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:51,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:51,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:44:51,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 197 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) [2024-06-27 20:44:51,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:51,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:44:51,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:51,522 INFO L124 PetriNetUnfolderBase]: 205/369 cut-off events. [2024-06-27 20:44:51,522 INFO L125 PetriNetUnfolderBase]: For 1395/1395 co-relation queries the response was YES. [2024-06-27 20:44:51,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 369 events. 205/369 cut-off events. For 1395/1395 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1270 event pairs, 66 based on Foata normal form. 1/368 useless extension candidates. Maximal degree in co-relation 1299. Up to 325 conditions per place. [2024-06-27 20:44:51,525 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 38 selfloop transitions, 16 changer transitions 0/56 dead transitions. [2024-06-27 20:44:51,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 375 flow [2024-06-27 20:44:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-06-27 20:44:51,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4055299539170507 [2024-06-27 20:44:51,526 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 197 flow. Second operand 7 states and 88 transitions. [2024-06-27 20:44:51,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 375 flow [2024-06-27 20:44:51,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 354 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 20:44:51,530 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 237 flow [2024-06-27 20:44:51,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=237, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2024-06-27 20:44:51,531 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2024-06-27 20:44:51,531 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 237 flow [2024-06-27 20:44:51,531 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) [2024-06-27 20:44:51,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:51,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:51,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:44:51,532 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)] === [2024-06-27 20:44:51,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:51,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1767734308, now seen corresponding path program 1 times [2024-06-27 20:44:51,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:51,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076786201] [2024-06-27 20:44:51,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:51,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:52,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:52,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076786201] [2024-06-27 20:44:52,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076786201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:52,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:52,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:52,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292959899] [2024-06-27 20:44:52,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:52,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:52,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:52,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:52,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:52,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:44:52,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 237 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) [2024-06-27 20:44:52,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:52,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:44:52,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:52,559 INFO L124 PetriNetUnfolderBase]: 224/400 cut-off events. [2024-06-27 20:44:52,559 INFO L125 PetriNetUnfolderBase]: For 1947/1947 co-relation queries the response was YES. [2024-06-27 20:44:52,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1518 conditions, 400 events. 224/400 cut-off events. For 1947/1947 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1400 event pairs, 69 based on Foata normal form. 3/401 useless extension candidates. Maximal degree in co-relation 1493. Up to 346 conditions per place. [2024-06-27 20:44:52,563 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 46 selfloop transitions, 15 changer transitions 0/63 dead transitions. [2024-06-27 20:44:52,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 63 transitions, 437 flow [2024-06-27 20:44:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:52,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-06-27 20:44:52,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147465437788018 [2024-06-27 20:44:52,564 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 237 flow. Second operand 7 states and 90 transitions. [2024-06-27 20:44:52,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 63 transitions, 437 flow [2024-06-27 20:44:52,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 414 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 20:44:52,569 INFO L231 Difference]: Finished difference. Result has 58 places, 48 transitions, 288 flow [2024-06-27 20:44:52,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=288, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2024-06-27 20:44:52,570 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2024-06-27 20:44:52,570 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 288 flow [2024-06-27 20:44:52,570 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) [2024-06-27 20:44:52,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:52,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:52,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:44:52,571 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)] === [2024-06-27 20:44:52,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:52,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1767734091, now seen corresponding path program 2 times [2024-06-27 20:44:52,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:52,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690320389] [2024-06-27 20:44:52,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:52,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:53,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:53,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690320389] [2024-06-27 20:44:53,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690320389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:53,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:53,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:53,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320972968] [2024-06-27 20:44:53,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:53,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:53,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:53,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:53,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:53,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:44:53,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 288 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) [2024-06-27 20:44:53,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:53,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:44:53,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:53,753 INFO L124 PetriNetUnfolderBase]: 227/405 cut-off events. [2024-06-27 20:44:53,753 INFO L125 PetriNetUnfolderBase]: For 2305/2305 co-relation queries the response was YES. [2024-06-27 20:44:53,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1664 conditions, 405 events. 227/405 cut-off events. For 2305/2305 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1421 event pairs, 68 based on Foata normal form. 1/404 useless extension candidates. Maximal degree in co-relation 1636. Up to 376 conditions per place. [2024-06-27 20:44:53,757 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 45 selfloop transitions, 13 changer transitions 0/60 dead transitions. [2024-06-27 20:44:53,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 60 transitions, 440 flow [2024-06-27 20:44:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:53,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-27 20:44:53,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824884792626728 [2024-06-27 20:44:53,758 INFO L175 Difference]: Start difference. First operand has 58 places, 48 transitions, 288 flow. Second operand 7 states and 83 transitions. [2024-06-27 20:44:53,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 60 transitions, 440 flow [2024-06-27 20:44:53,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 60 transitions, 429 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 20:44:53,764 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 324 flow [2024-06-27 20:44:53,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=324, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2024-06-27 20:44:53,765 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-06-27 20:44:53,765 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 324 flow [2024-06-27 20:44:53,765 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) [2024-06-27 20:44:53,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:53,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:53,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:44:53,766 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)] === [2024-06-27 20:44:53,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:53,766 INFO L85 PathProgramCache]: Analyzing trace with hash -557243431, now seen corresponding path program 3 times [2024-06-27 20:44:53,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:53,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413969998] [2024-06-27 20:44:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:53,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:54,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:54,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413969998] [2024-06-27 20:44:54,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413969998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:54,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:54,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:54,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996978380] [2024-06-27 20:44:54,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:54,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:54,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:54,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:54,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:54,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:44:54,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 324 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) [2024-06-27 20:44:54,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:54,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:44:54,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:54,846 INFO L124 PetriNetUnfolderBase]: 225/402 cut-off events. [2024-06-27 20:44:54,846 INFO L125 PetriNetUnfolderBase]: For 2681/2681 co-relation queries the response was YES. [2024-06-27 20:44:54,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 402 events. 225/402 cut-off events. For 2681/2681 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1406 event pairs, 67 based on Foata normal form. 1/401 useless extension candidates. Maximal degree in co-relation 1674. Up to 385 conditions per place. [2024-06-27 20:44:54,850 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 45 selfloop transitions, 10 changer transitions 0/57 dead transitions. [2024-06-27 20:44:54,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 57 transitions, 450 flow [2024-06-27 20:44:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-27 20:44:54,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-27 20:44:54,852 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 324 flow. Second operand 7 states and 78 transitions. [2024-06-27 20:44:54,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 57 transitions, 450 flow [2024-06-27 20:44:54,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 421 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:44:54,858 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 320 flow [2024-06-27 20:44:54,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=320, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2024-06-27 20:44:54,859 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-27 20:44:54,859 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 320 flow [2024-06-27 20:44:54,859 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) [2024-06-27 20:44:54,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:54,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:54,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:44:54,860 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)] === [2024-06-27 20:44:54,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:54,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1508359504, now seen corresponding path program 2 times [2024-06-27 20:44:54,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:54,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813430475] [2024-06-27 20:44:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:54,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:55,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:55,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813430475] [2024-06-27 20:44:55,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813430475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:55,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:55,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:55,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856504043] [2024-06-27 20:44:55,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:55,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:55,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:55,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:55,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:55,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:44:55,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 50 transitions, 320 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) [2024-06-27 20:44:55,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:55,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:44:55,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:55,835 INFO L124 PetriNetUnfolderBase]: 234/417 cut-off events. [2024-06-27 20:44:55,835 INFO L125 PetriNetUnfolderBase]: For 3300/3300 co-relation queries the response was YES. [2024-06-27 20:44:55,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1789 conditions, 417 events. 234/417 cut-off events. For 3300/3300 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1479 event pairs, 67 based on Foata normal form. 3/418 useless extension candidates. Maximal degree in co-relation 1757. Up to 377 conditions per place. [2024-06-27 20:44:55,839 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 49 selfloop transitions, 13 changer transitions 0/64 dead transitions. [2024-06-27 20:44:55,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 64 transitions, 512 flow [2024-06-27 20:44:55,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-06-27 20:44:55,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391705069124424 [2024-06-27 20:44:55,840 INFO L175 Difference]: Start difference. First operand has 65 places, 50 transitions, 320 flow. Second operand 7 states and 85 transitions. [2024-06-27 20:44:55,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 64 transitions, 512 flow [2024-06-27 20:44:55,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 477 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:44:55,847 INFO L231 Difference]: Finished difference. Result has 65 places, 52 transitions, 330 flow [2024-06-27 20:44:55,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=330, PETRI_PLACES=65, PETRI_TRANSITIONS=52} [2024-06-27 20:44:55,848 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-27 20:44:55,848 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 52 transitions, 330 flow [2024-06-27 20:44:55,848 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) [2024-06-27 20:44:55,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:55,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:55,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:44:55,848 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)] === [2024-06-27 20:44:55,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:55,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1974654658, now seen corresponding path program 3 times [2024-06-27 20:44:55,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:55,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17516121] [2024-06-27 20:44:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:55,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:56,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:56,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17516121] [2024-06-27 20:44:56,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17516121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:56,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:56,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:56,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646028154] [2024-06-27 20:44:56,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:56,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:56,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:56,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:56,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:56,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:44:56,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 330 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) [2024-06-27 20:44:56,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:56,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:44:56,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:56,792 INFO L124 PetriNetUnfolderBase]: 228/408 cut-off events. [2024-06-27 20:44:56,792 INFO L125 PetriNetUnfolderBase]: For 3579/3579 co-relation queries the response was YES. [2024-06-27 20:44:56,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1760 conditions, 408 events. 228/408 cut-off events. For 3579/3579 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1447 event pairs, 65 based on Foata normal form. 3/409 useless extension candidates. Maximal degree in co-relation 1728. Up to 385 conditions per place. [2024-06-27 20:44:56,796 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 49 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-06-27 20:44:56,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 61 transitions, 470 flow [2024-06-27 20:44:56,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-27 20:44:56,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-27 20:44:56,798 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 330 flow. Second operand 7 states and 80 transitions. [2024-06-27 20:44:56,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 61 transitions, 470 flow [2024-06-27 20:44:56,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 432 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 20:44:56,803 INFO L231 Difference]: Finished difference. Result has 67 places, 52 transitions, 317 flow [2024-06-27 20:44:56,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=317, PETRI_PLACES=67, PETRI_TRANSITIONS=52} [2024-06-27 20:44:56,804 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-06-27 20:44:56,804 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 52 transitions, 317 flow [2024-06-27 20:44:56,804 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) [2024-06-27 20:44:56,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:56,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:56,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:44:56,805 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)] === [2024-06-27 20:44:56,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:56,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1039578874, now seen corresponding path program 1 times [2024-06-27 20:44:56,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:56,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329572180] [2024-06-27 20:44:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:56,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:57,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:57,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329572180] [2024-06-27 20:44:57,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329572180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:57,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:57,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:57,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560365729] [2024-06-27 20:44:57,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:57,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:57,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:57,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:57,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:57,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:44:57,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 52 transitions, 317 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) [2024-06-27 20:44:57,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:57,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:44:57,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:58,112 INFO L124 PetriNetUnfolderBase]: 234/418 cut-off events. [2024-06-27 20:44:58,112 INFO L125 PetriNetUnfolderBase]: For 3910/3910 co-relation queries the response was YES. [2024-06-27 20:44:58,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1804 conditions, 418 events. 234/418 cut-off events. For 3910/3910 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1497 event pairs, 46 based on Foata normal form. 2/418 useless extension candidates. Maximal degree in co-relation 1772. Up to 366 conditions per place. [2024-06-27 20:44:58,116 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 59 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2024-06-27 20:44:58,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 73 transitions, 517 flow [2024-06-27 20:44:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-27 20:44:58,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-27 20:44:58,117 INFO L175 Difference]: Start difference. First operand has 67 places, 52 transitions, 317 flow. Second operand 8 states and 98 transitions. [2024-06-27 20:44:58,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 73 transitions, 517 flow [2024-06-27 20:44:58,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 491 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:58,124 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 336 flow [2024-06-27 20:44:58,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2024-06-27 20:44:58,125 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2024-06-27 20:44:58,125 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 336 flow [2024-06-27 20:44:58,125 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) [2024-06-27 20:44:58,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:58,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:58,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:44:58,126 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)] === [2024-06-27 20:44:58,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:58,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1034990068, now seen corresponding path program 1 times [2024-06-27 20:44:58,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:58,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270112453] [2024-06-27 20:44:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:58,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:59,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:59,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270112453] [2024-06-27 20:44:59,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270112453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:59,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:59,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:59,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23705263] [2024-06-27 20:44:59,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:59,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:59,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:59,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:59,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:59,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:44:59,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 336 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) [2024-06-27 20:44:59,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:59,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:44:59,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:59,439 INFO L124 PetriNetUnfolderBase]: 247/439 cut-off events. [2024-06-27 20:44:59,439 INFO L125 PetriNetUnfolderBase]: For 4558/4558 co-relation queries the response was YES. [2024-06-27 20:44:59,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1969 conditions, 439 events. 247/439 cut-off events. For 4558/4558 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1603 event pairs, 64 based on Foata normal form. 1/438 useless extension candidates. Maximal degree in co-relation 1936. Up to 331 conditions per place. [2024-06-27 20:44:59,443 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 49 selfloop transitions, 26 changer transitions 0/77 dead transitions. [2024-06-27 20:44:59,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 582 flow [2024-06-27 20:44:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-27 20:44:59,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:44:59,445 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 336 flow. Second operand 8 states and 104 transitions. [2024-06-27 20:44:59,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 582 flow [2024-06-27 20:44:59,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 553 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:59,451 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 407 flow [2024-06-27 20:44:59,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=407, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2024-06-27 20:44:59,452 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-27 20:44:59,452 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 407 flow [2024-06-27 20:44:59,452 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) [2024-06-27 20:44:59,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:59,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:59,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:44:59,453 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)] === [2024-06-27 20:44:59,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:59,453 INFO L85 PathProgramCache]: Analyzing trace with hash -662633126, now seen corresponding path program 2 times [2024-06-27 20:44:59,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:59,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242105461] [2024-06-27 20:44:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:59,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:00,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:00,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242105461] [2024-06-27 20:45:00,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242105461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:00,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:00,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:00,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645542148] [2024-06-27 20:45:00,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:00,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:00,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:00,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:00,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:00,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 407 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) [2024-06-27 20:45:00,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:00,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:00,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:00,661 INFO L124 PetriNetUnfolderBase]: 253/449 cut-off events. [2024-06-27 20:45:00,662 INFO L125 PetriNetUnfolderBase]: For 5425/5425 co-relation queries the response was YES. [2024-06-27 20:45:00,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2176 conditions, 449 events. 253/449 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1646 event pairs, 49 based on Foata normal form. 2/449 useless extension candidates. Maximal degree in co-relation 2141. Up to 362 conditions per place. [2024-06-27 20:45:00,668 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 56 selfloop transitions, 23 changer transitions 0/81 dead transitions. [2024-06-27 20:45:00,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 671 flow [2024-06-27 20:45:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 102 transitions. [2024-06-27 20:45:00,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2024-06-27 20:45:00,671 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 407 flow. Second operand 8 states and 102 transitions. [2024-06-27 20:45:00,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 671 flow [2024-06-27 20:45:00,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 641 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:00,682 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 464 flow [2024-06-27 20:45:00,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=464, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2024-06-27 20:45:00,683 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2024-06-27 20:45:00,683 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 464 flow [2024-06-27 20:45:00,683 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) [2024-06-27 20:45:00,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:00,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:00,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:45:00,684 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)] === [2024-06-27 20:45:00,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:00,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1034810578, now seen corresponding path program 2 times [2024-06-27 20:45:00,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:00,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986159031] [2024-06-27 20:45:00,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:00,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:01,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:01,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986159031] [2024-06-27 20:45:01,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986159031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:01,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:01,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:01,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923499059] [2024-06-27 20:45:01,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:01,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:01,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:01,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:01,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:01,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:01,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 464 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) [2024-06-27 20:45:01,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:01,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:01,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:01,923 INFO L124 PetriNetUnfolderBase]: 262/464 cut-off events. [2024-06-27 20:45:01,923 INFO L125 PetriNetUnfolderBase]: For 6280/6280 co-relation queries the response was YES. [2024-06-27 20:45:01,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2341 conditions, 464 events. 262/464 cut-off events. For 6280/6280 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1723 event pairs, 65 based on Foata normal form. 3/465 useless extension candidates. Maximal degree in co-relation 2304. Up to 397 conditions per place. [2024-06-27 20:45:01,927 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 60 selfloop transitions, 20 changer transitions 0/82 dead transitions. [2024-06-27 20:45:01,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 82 transitions, 691 flow [2024-06-27 20:45:01,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-27 20:45:01,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-27 20:45:01,929 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 464 flow. Second operand 8 states and 100 transitions. [2024-06-27 20:45:01,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 82 transitions, 691 flow [2024-06-27 20:45:01,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 658 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:01,937 INFO L231 Difference]: Finished difference. Result has 80 places, 66 transitions, 502 flow [2024-06-27 20:45:01,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=502, PETRI_PLACES=80, PETRI_TRANSITIONS=66} [2024-06-27 20:45:01,938 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2024-06-27 20:45:01,938 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 66 transitions, 502 flow [2024-06-27 20:45:01,939 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) [2024-06-27 20:45:01,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:01,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:01,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:45:01,939 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)] === [2024-06-27 20:45:01,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:01,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1034817274, now seen corresponding path program 3 times [2024-06-27 20:45:01,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:01,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194902472] [2024-06-27 20:45:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:01,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:02,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:02,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194902472] [2024-06-27 20:45:02,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194902472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:02,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:02,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:02,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625902453] [2024-06-27 20:45:02,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:02,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:02,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:02,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:02,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:02,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:02,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 66 transitions, 502 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) [2024-06-27 20:45:02,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:02,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:02,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:03,144 INFO L124 PetriNetUnfolderBase]: 268/474 cut-off events. [2024-06-27 20:45:03,144 INFO L125 PetriNetUnfolderBase]: For 6846/6846 co-relation queries the response was YES. [2024-06-27 20:45:03,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2466 conditions, 474 events. 268/474 cut-off events. For 6846/6846 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1762 event pairs, 68 based on Foata normal form. 2/474 useless extension candidates. Maximal degree in co-relation 2427. Up to 439 conditions per place. [2024-06-27 20:45:03,148 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 63 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-27 20:45:03,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 80 transitions, 704 flow [2024-06-27 20:45:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-27 20:45:03,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:45:03,150 INFO L175 Difference]: Start difference. First operand has 80 places, 66 transitions, 502 flow. Second operand 8 states and 93 transitions. [2024-06-27 20:45:03,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 80 transitions, 704 flow [2024-06-27 20:45:03,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 80 transitions, 664 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:03,159 INFO L231 Difference]: Finished difference. Result has 82 places, 68 transitions, 519 flow [2024-06-27 20:45:03,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=519, PETRI_PLACES=82, PETRI_TRANSITIONS=68} [2024-06-27 20:45:03,160 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-27 20:45:03,160 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 68 transitions, 519 flow [2024-06-27 20:45:03,160 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) [2024-06-27 20:45:03,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:03,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:03,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:45:03,161 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)] === [2024-06-27 20:45:03,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:03,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1593273604, now seen corresponding path program 3 times [2024-06-27 20:45:03,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:03,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771843017] [2024-06-27 20:45:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:03,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:04,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:04,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771843017] [2024-06-27 20:45:04,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771843017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:04,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:04,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:04,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971658160] [2024-06-27 20:45:04,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:04,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:04,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:04,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:04,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:04,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:04,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 68 transitions, 519 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) [2024-06-27 20:45:04,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:04,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:04,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:04,451 INFO L124 PetriNetUnfolderBase]: 271/479 cut-off events. [2024-06-27 20:45:04,451 INFO L125 PetriNetUnfolderBase]: For 7402/7402 co-relation queries the response was YES. [2024-06-27 20:45:04,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2517 conditions, 479 events. 271/479 cut-off events. For 7402/7402 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1792 event pairs, 65 based on Foata normal form. 1/478 useless extension candidates. Maximal degree in co-relation 2477. Up to 406 conditions per place. [2024-06-27 20:45:04,456 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 61 selfloop transitions, 23 changer transitions 0/86 dead transitions. [2024-06-27 20:45:04,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 751 flow [2024-06-27 20:45:04,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 102 transitions. [2024-06-27 20:45:04,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2024-06-27 20:45:04,458 INFO L175 Difference]: Start difference. First operand has 82 places, 68 transitions, 519 flow. Second operand 8 states and 102 transitions. [2024-06-27 20:45:04,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 751 flow [2024-06-27 20:45:04,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 86 transitions, 714 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:04,467 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 553 flow [2024-06-27 20:45:04,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=553, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2024-06-27 20:45:04,468 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2024-06-27 20:45:04,468 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 553 flow [2024-06-27 20:45:04,468 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) [2024-06-27 20:45:04,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:04,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:04,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:45:04,469 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)] === [2024-06-27 20:45:04,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:04,469 INFO L85 PathProgramCache]: Analyzing trace with hash -759611544, now seen corresponding path program 4 times [2024-06-27 20:45:04,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:04,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526361301] [2024-06-27 20:45:04,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:04,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:05,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:05,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526361301] [2024-06-27 20:45:05,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526361301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:05,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:05,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:05,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414945240] [2024-06-27 20:45:05,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:05,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:05,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:05,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:05,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:05,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:05,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 70 transitions, 553 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) [2024-06-27 20:45:05,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:05,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:05,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:05,713 INFO L124 PetriNetUnfolderBase]: 267/473 cut-off events. [2024-06-27 20:45:05,714 INFO L125 PetriNetUnfolderBase]: For 7930/7930 co-relation queries the response was YES. [2024-06-27 20:45:05,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2521 conditions, 473 events. 267/473 cut-off events. For 7930/7930 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1762 event pairs, 66 based on Foata normal form. 2/473 useless extension candidates. Maximal degree in co-relation 2480. Up to 450 conditions per place. [2024-06-27 20:45:05,718 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 65 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-06-27 20:45:05,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 79 transitions, 727 flow [2024-06-27 20:45:05,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:05,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-27 20:45:05,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:45:05,721 INFO L175 Difference]: Start difference. First operand has 84 places, 70 transitions, 553 flow. Second operand 8 states and 88 transitions. [2024-06-27 20:45:05,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 79 transitions, 727 flow [2024-06-27 20:45:05,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 79 transitions, 672 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:05,736 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 527 flow [2024-06-27 20:45:05,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=527, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2024-06-27 20:45:05,737 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2024-06-27 20:45:05,737 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 527 flow [2024-06-27 20:45:05,738 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) [2024-06-27 20:45:05,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:05,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:05,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:45:05,738 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)] === [2024-06-27 20:45:05,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:05,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1821174754, now seen corresponding path program 4 times [2024-06-27 20:45:05,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:05,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093345907] [2024-06-27 20:45:05,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:05,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:06,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:06,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093345907] [2024-06-27 20:45:06,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093345907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:06,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:06,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:06,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352456297] [2024-06-27 20:45:06,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:06,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:06,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:06,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:06,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:06,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:06,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 527 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) [2024-06-27 20:45:06,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:06,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:06,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:06,879 INFO L124 PetriNetUnfolderBase]: 270/478 cut-off events. [2024-06-27 20:45:06,880 INFO L125 PetriNetUnfolderBase]: For 8381/8381 co-relation queries the response was YES. [2024-06-27 20:45:06,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2538 conditions, 478 events. 270/478 cut-off events. For 8381/8381 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1793 event pairs, 63 based on Foata normal form. 1/477 useless extension candidates. Maximal degree in co-relation 2496. Up to 416 conditions per place. [2024-06-27 20:45:06,884 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 63 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-27 20:45:06,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 84 transitions, 785 flow [2024-06-27 20:45:06,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:06,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-27 20:45:06,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-27 20:45:06,885 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 527 flow. Second operand 8 states and 95 transitions. [2024-06-27 20:45:06,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 84 transitions, 785 flow [2024-06-27 20:45:06,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 84 transitions, 744 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:06,895 INFO L231 Difference]: Finished difference. Result has 87 places, 72 transitions, 549 flow [2024-06-27 20:45:06,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=549, PETRI_PLACES=87, PETRI_TRANSITIONS=72} [2024-06-27 20:45:06,896 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-27 20:45:06,896 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 72 transitions, 549 flow [2024-06-27 20:45:06,897 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) [2024-06-27 20:45:06,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:06,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:06,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:45:06,897 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)] === [2024-06-27 20:45:06,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:06,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1084752976, now seen corresponding path program 5 times [2024-06-27 20:45:06,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:06,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48774501] [2024-06-27 20:45:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:06,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:07,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:07,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48774501] [2024-06-27 20:45:07,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48774501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:07,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:07,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:07,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196392273] [2024-06-27 20:45:07,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:07,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:07,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:07,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:07,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:07,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:07,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 72 transitions, 549 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) [2024-06-27 20:45:07,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:07,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:07,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:07,990 INFO L124 PetriNetUnfolderBase]: 279/493 cut-off events. [2024-06-27 20:45:07,990 INFO L125 PetriNetUnfolderBase]: For 9623/9623 co-relation queries the response was YES. [2024-06-27 20:45:07,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2674 conditions, 493 events. 279/493 cut-off events. For 9623/9623 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1861 event pairs, 66 based on Foata normal form. 3/494 useless extension candidates. Maximal degree in co-relation 2631. Up to 459 conditions per place. [2024-06-27 20:45:07,994 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 71 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2024-06-27 20:45:07,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 86 transitions, 782 flow [2024-06-27 20:45:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2024-06-27 20:45:07,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36693548387096775 [2024-06-27 20:45:07,996 INFO L175 Difference]: Start difference. First operand has 87 places, 72 transitions, 549 flow. Second operand 8 states and 91 transitions. [2024-06-27 20:45:07,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 86 transitions, 782 flow [2024-06-27 20:45:08,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 719 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:08,009 INFO L231 Difference]: Finished difference. Result has 89 places, 75 transitions, 559 flow [2024-06-27 20:45:08,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=559, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2024-06-27 20:45:08,010 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-06-27 20:45:08,010 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 559 flow [2024-06-27 20:45:08,010 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) [2024-06-27 20:45:08,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:08,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:08,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:45:08,010 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)] === [2024-06-27 20:45:08,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:08,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1829752392, now seen corresponding path program 1 times [2024-06-27 20:45:08,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:08,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341197633] [2024-06-27 20:45:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:08,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:08,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:08,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341197633] [2024-06-27 20:45:08,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341197633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:08,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:08,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:08,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642555629] [2024-06-27 20:45:08,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:08,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:08,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:08,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:08,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:08,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:08,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 559 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) [2024-06-27 20:45:08,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:08,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:08,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:09,057 INFO L124 PetriNetUnfolderBase]: 275/487 cut-off events. [2024-06-27 20:45:09,058 INFO L125 PetriNetUnfolderBase]: For 9739/9739 co-relation queries the response was YES. [2024-06-27 20:45:09,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2616 conditions, 487 events. 275/487 cut-off events. For 9739/9739 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1829 event pairs, 65 based on Foata normal form. 2/487 useless extension candidates. Maximal degree in co-relation 2572. Up to 459 conditions per place. [2024-06-27 20:45:09,061 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 73 selfloop transitions, 12 changer transitions 0/87 dead transitions. [2024-06-27 20:45:09,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 87 transitions, 767 flow [2024-06-27 20:45:09,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:09,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-27 20:45:09,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-27 20:45:09,064 INFO L175 Difference]: Start difference. First operand has 89 places, 75 transitions, 559 flow. Second operand 8 states and 89 transitions. [2024-06-27 20:45:09,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 87 transitions, 767 flow [2024-06-27 20:45:09,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 87 transitions, 731 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:09,073 INFO L231 Difference]: Finished difference. Result has 91 places, 77 transitions, 572 flow [2024-06-27 20:45:09,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=572, PETRI_PLACES=91, PETRI_TRANSITIONS=77} [2024-06-27 20:45:09,073 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 61 predicate places. [2024-06-27 20:45:09,073 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 77 transitions, 572 flow [2024-06-27 20:45:09,074 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) [2024-06-27 20:45:09,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:09,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:09,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:45:09,074 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)] === [2024-06-27 20:45:09,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:09,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1076478766, now seen corresponding path program 6 times [2024-06-27 20:45:09,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:09,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456708376] [2024-06-27 20:45:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:09,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:09,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:09,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456708376] [2024-06-27 20:45:09,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456708376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:09,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:09,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:09,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876838011] [2024-06-27 20:45:09,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:09,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:09,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:09,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:09,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:09,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:09,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 77 transitions, 572 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) [2024-06-27 20:45:09,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:09,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:09,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:10,073 INFO L124 PetriNetUnfolderBase]: 269/478 cut-off events. [2024-06-27 20:45:10,074 INFO L125 PetriNetUnfolderBase]: For 9835/9835 co-relation queries the response was YES. [2024-06-27 20:45:10,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 478 events. 269/478 cut-off events. For 9835/9835 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1792 event pairs, 62 based on Foata normal form. 3/479 useless extension candidates. Maximal degree in co-relation 2488. Up to 432 conditions per place. [2024-06-27 20:45:10,078 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 72 selfloop transitions, 16 changer transitions 0/90 dead transitions. [2024-06-27 20:45:10,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 90 transitions, 788 flow [2024-06-27 20:45:10,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-27 20:45:10,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-27 20:45:10,080 INFO L175 Difference]: Start difference. First operand has 91 places, 77 transitions, 572 flow. Second operand 8 states and 95 transitions. [2024-06-27 20:45:10,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 90 transitions, 788 flow [2024-06-27 20:45:10,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 90 transitions, 740 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:10,093 INFO L231 Difference]: Finished difference. Result has 93 places, 77 transitions, 562 flow [2024-06-27 20:45:10,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=85, 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=562, PETRI_PLACES=93, PETRI_TRANSITIONS=77} [2024-06-27 20:45:10,093 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2024-06-27 20:45:10,094 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 77 transitions, 562 flow [2024-06-27 20:45:10,094 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) [2024-06-27 20:45:10,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:10,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:10,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:45:10,094 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)] === [2024-06-27 20:45:10,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:10,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1829763304, now seen corresponding path program 1 times [2024-06-27 20:45:10,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:10,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348079358] [2024-06-27 20:45:10,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:10,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:11,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:11,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348079358] [2024-06-27 20:45:11,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348079358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:11,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:11,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:11,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402060984] [2024-06-27 20:45:11,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:11,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:11,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:11,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:11,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:11,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:11,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 77 transitions, 562 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) [2024-06-27 20:45:11,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:11,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:11,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:11,443 INFO L124 PetriNetUnfolderBase]: 266/473 cut-off events. [2024-06-27 20:45:11,443 INFO L125 PetriNetUnfolderBase]: For 9725/9725 co-relation queries the response was YES. [2024-06-27 20:45:11,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2486 conditions, 473 events. 266/473 cut-off events. For 9725/9725 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1754 event pairs, 63 based on Foata normal form. 2/473 useless extension candidates. Maximal degree in co-relation 2440. Up to 447 conditions per place. [2024-06-27 20:45:11,453 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 74 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2024-06-27 20:45:11,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 87 transitions, 754 flow [2024-06-27 20:45:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-27 20:45:11,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-27 20:45:11,455 INFO L175 Difference]: Start difference. First operand has 93 places, 77 transitions, 562 flow. Second operand 8 states and 87 transitions. [2024-06-27 20:45:11,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 87 transitions, 754 flow [2024-06-27 20:45:11,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 87 transitions, 707 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:11,466 INFO L231 Difference]: Finished difference. Result has 94 places, 77 transitions, 541 flow [2024-06-27 20:45:11,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=541, PETRI_PLACES=94, PETRI_TRANSITIONS=77} [2024-06-27 20:45:11,468 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-06-27 20:45:11,468 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 77 transitions, 541 flow [2024-06-27 20:45:11,468 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) [2024-06-27 20:45:11,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:11,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:11,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:45:11,469 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)] === [2024-06-27 20:45:11,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:11,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2136369133, now seen corresponding path program 1 times [2024-06-27 20:45:11,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:11,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212912293] [2024-06-27 20:45:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:11,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:12,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:12,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212912293] [2024-06-27 20:45:12,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212912293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:12,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:12,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:12,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360068879] [2024-06-27 20:45:12,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:12,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:12,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:12,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:12,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:12,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:12,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 77 transitions, 541 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) [2024-06-27 20:45:12,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:12,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:12,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:12,789 INFO L124 PetriNetUnfolderBase]: 272/483 cut-off events. [2024-06-27 20:45:12,789 INFO L125 PetriNetUnfolderBase]: For 10439/10439 co-relation queries the response was YES. [2024-06-27 20:45:12,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2515 conditions, 483 events. 272/483 cut-off events. For 10439/10439 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1823 event pairs, 47 based on Foata normal form. 2/483 useless extension candidates. Maximal degree in co-relation 2468. Up to 423 conditions per place. [2024-06-27 20:45:12,793 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 84 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2024-06-27 20:45:12,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 100 transitions, 803 flow [2024-06-27 20:45:12,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-27 20:45:12,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-27 20:45:12,795 INFO L175 Difference]: Start difference. First operand has 94 places, 77 transitions, 541 flow. Second operand 9 states and 108 transitions. [2024-06-27 20:45:12,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 100 transitions, 803 flow [2024-06-27 20:45:12,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 100 transitions, 777 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:12,807 INFO L231 Difference]: Finished difference. Result has 97 places, 79 transitions, 568 flow [2024-06-27 20:45:12,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=568, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2024-06-27 20:45:12,807 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 67 predicate places. [2024-06-27 20:45:12,807 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 568 flow [2024-06-27 20:45:12,808 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) [2024-06-27 20:45:12,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:12,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:12,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:45:12,808 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)] === [2024-06-27 20:45:12,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:12,809 INFO L85 PathProgramCache]: Analyzing trace with hash 933216310, now seen corresponding path program 1 times [2024-06-27 20:45:12,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:12,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125141182] [2024-06-27 20:45:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:12,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:13,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:13,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125141182] [2024-06-27 20:45:13,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125141182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:13,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:13,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:13,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086969030] [2024-06-27 20:45:13,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:13,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:13,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:13,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:13,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:13,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:13,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 568 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) [2024-06-27 20:45:13,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:13,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:13,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:14,150 INFO L124 PetriNetUnfolderBase]: 288/509 cut-off events. [2024-06-27 20:45:14,151 INFO L125 PetriNetUnfolderBase]: For 11971/11971 co-relation queries the response was YES. [2024-06-27 20:45:14,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2736 conditions, 509 events. 288/509 cut-off events. For 11971/11971 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1963 event pairs, 61 based on Foata normal form. 2/509 useless extension candidates. Maximal degree in co-relation 2688. Up to 370 conditions per place. [2024-06-27 20:45:14,157 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 66 selfloop transitions, 35 changer transitions 0/103 dead transitions. [2024-06-27 20:45:14,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 103 transitions, 910 flow [2024-06-27 20:45:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-27 20:45:14,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-27 20:45:14,158 INFO L175 Difference]: Start difference. First operand has 97 places, 79 transitions, 568 flow. Second operand 9 states and 114 transitions. [2024-06-27 20:45:14,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 103 transitions, 910 flow [2024-06-27 20:45:14,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 103 transitions, 873 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:14,179 INFO L231 Difference]: Finished difference. Result has 99 places, 83 transitions, 642 flow [2024-06-27 20:45:14,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=642, PETRI_PLACES=99, PETRI_TRANSITIONS=83} [2024-06-27 20:45:14,184 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2024-06-27 20:45:14,185 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 83 transitions, 642 flow [2024-06-27 20:45:14,185 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) [2024-06-27 20:45:14,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:14,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:14,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:45:14,186 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)] === [2024-06-27 20:45:14,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:14,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1194003057, now seen corresponding path program 2 times [2024-06-27 20:45:14,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:14,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771288340] [2024-06-27 20:45:14,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:14,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:15,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:15,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771288340] [2024-06-27 20:45:15,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771288340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:15,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:15,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:15,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368337436] [2024-06-27 20:45:15,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:15,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:15,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:15,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:15,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:15,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 83 transitions, 642 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) [2024-06-27 20:45:15,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:15,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:15,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:15,357 INFO L124 PetriNetUnfolderBase]: 324/567 cut-off events. [2024-06-27 20:45:15,357 INFO L125 PetriNetUnfolderBase]: For 15481/15481 co-relation queries the response was YES. [2024-06-27 20:45:15,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3248 conditions, 567 events. 324/567 cut-off events. For 15481/15481 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2255 event pairs, 49 based on Foata normal form. 2/567 useless extension candidates. Maximal degree in co-relation 3199. Up to 325 conditions per place. [2024-06-27 20:45:15,362 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 68 selfloop transitions, 44 changer transitions 0/114 dead transitions. [2024-06-27 20:45:15,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 114 transitions, 1112 flow [2024-06-27 20:45:15,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-27 20:45:15,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2024-06-27 20:45:15,364 INFO L175 Difference]: Start difference. First operand has 99 places, 83 transitions, 642 flow. Second operand 9 states and 121 transitions. [2024-06-27 20:45:15,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 114 transitions, 1112 flow [2024-06-27 20:45:15,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 114 transitions, 1071 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 20:45:15,386 INFO L231 Difference]: Finished difference. Result has 104 places, 91 transitions, 806 flow [2024-06-27 20:45:15,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=806, PETRI_PLACES=104, PETRI_TRANSITIONS=91} [2024-06-27 20:45:15,387 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2024-06-27 20:45:15,387 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 91 transitions, 806 flow [2024-06-27 20:45:15,387 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) [2024-06-27 20:45:15,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:15,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:15,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:45:15,388 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)] === [2024-06-27 20:45:15,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:15,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1071738663, now seen corresponding path program 3 times [2024-06-27 20:45:15,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:15,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117825550] [2024-06-27 20:45:15,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:15,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:16,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:16,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117825550] [2024-06-27 20:45:16,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117825550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:16,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:16,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:16,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541879983] [2024-06-27 20:45:16,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:16,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:16,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:16,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:16,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:16,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:16,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 91 transitions, 806 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) [2024-06-27 20:45:16,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:16,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:16,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:16,632 INFO L124 PetriNetUnfolderBase]: 320/561 cut-off events. [2024-06-27 20:45:16,633 INFO L125 PetriNetUnfolderBase]: For 16041/16041 co-relation queries the response was YES. [2024-06-27 20:45:16,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3390 conditions, 561 events. 320/561 cut-off events. For 16041/16041 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2224 event pairs, 49 based on Foata normal form. 2/561 useless extension candidates. Maximal degree in co-relation 3338. Up to 322 conditions per place. [2024-06-27 20:45:16,636 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 68 selfloop transitions, 43 changer transitions 0/113 dead transitions. [2024-06-27 20:45:16,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 113 transitions, 1136 flow [2024-06-27 20:45:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-27 20:45:16,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2024-06-27 20:45:16,637 INFO L175 Difference]: Start difference. First operand has 104 places, 91 transitions, 806 flow. Second operand 9 states and 121 transitions. [2024-06-27 20:45:16,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 113 transitions, 1136 flow [2024-06-27 20:45:16,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 113 transitions, 1077 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:16,664 INFO L231 Difference]: Finished difference. Result has 109 places, 91 transitions, 838 flow [2024-06-27 20:45:16,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=838, PETRI_PLACES=109, PETRI_TRANSITIONS=91} [2024-06-27 20:45:16,665 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2024-06-27 20:45:16,665 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 91 transitions, 838 flow [2024-06-27 20:45:16,665 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) [2024-06-27 20:45:16,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:16,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:16,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:45:16,666 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)] === [2024-06-27 20:45:16,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:16,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2014563483, now seen corresponding path program 4 times [2024-06-27 20:45:16,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:16,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733029467] [2024-06-27 20:45:16,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:16,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:17,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:17,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733029467] [2024-06-27 20:45:17,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733029467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:17,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:17,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:17,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748647201] [2024-06-27 20:45:17,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:17,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:17,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:17,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:17,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:17,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:17,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 91 transitions, 838 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) [2024-06-27 20:45:17,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:17,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:17,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:17,843 INFO L124 PetriNetUnfolderBase]: 356/619 cut-off events. [2024-06-27 20:45:17,843 INFO L125 PetriNetUnfolderBase]: For 20256/20256 co-relation queries the response was YES. [2024-06-27 20:45:17,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3937 conditions, 619 events. 356/619 cut-off events. For 20256/20256 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2505 event pairs, 74 based on Foata normal form. 2/619 useless extension candidates. Maximal degree in co-relation 3884. Up to 497 conditions per place. [2024-06-27 20:45:17,847 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 85 selfloop transitions, 29 changer transitions 0/116 dead transitions. [2024-06-27 20:45:17,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 116 transitions, 1243 flow [2024-06-27 20:45:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:17,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-27 20:45:17,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:45:17,848 INFO L175 Difference]: Start difference. First operand has 109 places, 91 transitions, 838 flow. Second operand 9 states and 117 transitions. [2024-06-27 20:45:17,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 116 transitions, 1243 flow [2024-06-27 20:45:17,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 116 transitions, 1135 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:45:17,878 INFO L231 Difference]: Finished difference. Result has 111 places, 96 transitions, 878 flow [2024-06-27 20:45:17,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=878, PETRI_PLACES=111, PETRI_TRANSITIONS=96} [2024-06-27 20:45:17,879 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 81 predicate places. [2024-06-27 20:45:17,879 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 96 transitions, 878 flow [2024-06-27 20:45:17,879 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) [2024-06-27 20:45:17,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:17,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:17,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:45:17,880 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)] === [2024-06-27 20:45:17,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:17,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2014557686, now seen corresponding path program 2 times [2024-06-27 20:45:17,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:17,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290296657] [2024-06-27 20:45:17,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:17,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:18,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:18,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290296657] [2024-06-27 20:45:18,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290296657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:18,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:18,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:18,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748325691] [2024-06-27 20:45:18,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:18,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:18,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:18,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:18,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:19,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:19,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 96 transitions, 878 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) [2024-06-27 20:45:19,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:19,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:19,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:19,427 INFO L124 PetriNetUnfolderBase]: 372/645 cut-off events. [2024-06-27 20:45:19,427 INFO L125 PetriNetUnfolderBase]: For 22497/22497 co-relation queries the response was YES. [2024-06-27 20:45:19,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4121 conditions, 645 events. 372/645 cut-off events. For 22497/22497 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2657 event pairs, 83 based on Foata normal form. 2/645 useless extension candidates. Maximal degree in co-relation 4066. Up to 557 conditions per place. [2024-06-27 20:45:19,432 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 90 selfloop transitions, 26 changer transitions 0/118 dead transitions. [2024-06-27 20:45:19,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 1250 flow [2024-06-27 20:45:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-27 20:45:19,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050179211469534 [2024-06-27 20:45:19,434 INFO L175 Difference]: Start difference. First operand has 111 places, 96 transitions, 878 flow. Second operand 9 states and 113 transitions. [2024-06-27 20:45:19,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 1250 flow [2024-06-27 20:45:19,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 118 transitions, 1201 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:45:19,452 INFO L231 Difference]: Finished difference. Result has 115 places, 100 transitions, 926 flow [2024-06-27 20:45:19,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=926, PETRI_PLACES=115, PETRI_TRANSITIONS=100} [2024-06-27 20:45:19,453 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2024-06-27 20:45:19,453 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 100 transitions, 926 flow [2024-06-27 20:45:19,453 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) [2024-06-27 20:45:19,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:19,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:19,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:45:19,454 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)] === [2024-06-27 20:45:19,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:19,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2014557903, now seen corresponding path program 5 times [2024-06-27 20:45:19,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:19,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108747408] [2024-06-27 20:45:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:19,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:20,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:20,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108747408] [2024-06-27 20:45:20,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108747408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:20,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:20,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:20,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263193674] [2024-06-27 20:45:20,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:20,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:20,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:20,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:20,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:20,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:20,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 100 transitions, 926 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) [2024-06-27 20:45:20,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:20,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:20,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:20,637 INFO L124 PetriNetUnfolderBase]: 378/655 cut-off events. [2024-06-27 20:45:20,637 INFO L125 PetriNetUnfolderBase]: For 23908/23908 co-relation queries the response was YES. [2024-06-27 20:45:20,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4260 conditions, 655 events. 378/655 cut-off events. For 23908/23908 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2720 event pairs, 75 based on Foata normal form. 2/655 useless extension candidates. Maximal degree in co-relation 4203. Up to 529 conditions per place. [2024-06-27 20:45:20,641 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 90 selfloop transitions, 30 changer transitions 0/122 dead transitions. [2024-06-27 20:45:20,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 122 transitions, 1304 flow [2024-06-27 20:45:20,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:20,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-27 20:45:20,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:45:20,643 INFO L175 Difference]: Start difference. First operand has 115 places, 100 transitions, 926 flow. Second operand 9 states and 117 transitions. [2024-06-27 20:45:20,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 122 transitions, 1304 flow [2024-06-27 20:45:20,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 122 transitions, 1270 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 20:45:20,673 INFO L231 Difference]: Finished difference. Result has 119 places, 102 transitions, 985 flow [2024-06-27 20:45:20,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=985, PETRI_PLACES=119, PETRI_TRANSITIONS=102} [2024-06-27 20:45:20,673 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2024-06-27 20:45:20,673 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 102 transitions, 985 flow [2024-06-27 20:45:20,673 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) [2024-06-27 20:45:20,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:20,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:20,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:45:20,674 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)] === [2024-06-27 20:45:20,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:20,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2147044031, now seen corresponding path program 6 times [2024-06-27 20:45:20,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:20,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550258506] [2024-06-27 20:45:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:20,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:21,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:21,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550258506] [2024-06-27 20:45:21,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550258506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:21,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:21,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:21,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039991380] [2024-06-27 20:45:21,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:21,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:21,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:21,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:21,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:21,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:21,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 102 transitions, 985 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) [2024-06-27 20:45:21,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:21,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:21,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:21,794 INFO L124 PetriNetUnfolderBase]: 366/637 cut-off events. [2024-06-27 20:45:21,794 INFO L125 PetriNetUnfolderBase]: For 24290/24290 co-relation queries the response was YES. [2024-06-27 20:45:21,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4089 conditions, 637 events. 366/637 cut-off events. For 24290/24290 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2626 event pairs, 74 based on Foata normal form. 6/641 useless extension candidates. Maximal degree in co-relation 4030. Up to 548 conditions per place. [2024-06-27 20:45:21,798 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 95 selfloop transitions, 23 changer transitions 0/120 dead transitions. [2024-06-27 20:45:21,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 120 transitions, 1263 flow [2024-06-27 20:45:21,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:21,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-27 20:45:21,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014336917562724 [2024-06-27 20:45:21,800 INFO L175 Difference]: Start difference. First operand has 119 places, 102 transitions, 985 flow. Second operand 9 states and 112 transitions. [2024-06-27 20:45:21,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 120 transitions, 1263 flow [2024-06-27 20:45:21,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 120 transitions, 1190 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:21,838 INFO L231 Difference]: Finished difference. Result has 122 places, 102 transitions, 964 flow [2024-06-27 20:45:21,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=964, PETRI_PLACES=122, PETRI_TRANSITIONS=102} [2024-06-27 20:45:21,839 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-06-27 20:45:21,839 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 102 transitions, 964 flow [2024-06-27 20:45:21,839 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) [2024-06-27 20:45:21,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:21,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:21,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:45:21,840 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)] === [2024-06-27 20:45:21,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:21,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2147044248, now seen corresponding path program 3 times [2024-06-27 20:45:21,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:21,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853357698] [2024-06-27 20:45:21,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:21,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:22,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:22,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853357698] [2024-06-27 20:45:22,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853357698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:22,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:22,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:22,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756747223] [2024-06-27 20:45:22,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:22,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:22,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:22,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:22,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:23,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:23,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 102 transitions, 964 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) [2024-06-27 20:45:23,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:23,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:23,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:23,377 INFO L124 PetriNetUnfolderBase]: 362/631 cut-off events. [2024-06-27 20:45:23,377 INFO L125 PetriNetUnfolderBase]: For 22018/22018 co-relation queries the response was YES. [2024-06-27 20:45:23,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3991 conditions, 631 events. 362/631 cut-off events. For 22018/22018 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2601 event pairs, 75 based on Foata normal form. 2/631 useless extension candidates. Maximal degree in co-relation 3931. Up to 558 conditions per place. [2024-06-27 20:45:23,382 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 95 selfloop transitions, 22 changer transitions 0/119 dead transitions. [2024-06-27 20:45:23,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 119 transitions, 1238 flow [2024-06-27 20:45:23,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:23,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-27 20:45:23,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-27 20:45:23,395 INFO L175 Difference]: Start difference. First operand has 122 places, 102 transitions, 964 flow. Second operand 9 states and 110 transitions. [2024-06-27 20:45:23,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 119 transitions, 1238 flow [2024-06-27 20:45:23,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 119 transitions, 1170 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 20:45:23,436 INFO L231 Difference]: Finished difference. Result has 122 places, 102 transitions, 945 flow [2024-06-27 20:45:23,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=945, PETRI_PLACES=122, PETRI_TRANSITIONS=102} [2024-06-27 20:45:23,437 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-06-27 20:45:23,437 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 102 transitions, 945 flow [2024-06-27 20:45:23,437 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) [2024-06-27 20:45:23,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:23,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:23,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:45:23,438 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)] === [2024-06-27 20:45:23,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:23,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1807208118, now seen corresponding path program 4 times [2024-06-27 20:45:23,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:23,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985450608] [2024-06-27 20:45:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:23,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:24,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:24,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985450608] [2024-06-27 20:45:24,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985450608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:24,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:24,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:24,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285229949] [2024-06-27 20:45:24,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:24,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:24,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:24,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:24,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:24,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:24,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 102 transitions, 945 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) [2024-06-27 20:45:24,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:24,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:24,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:24,658 INFO L124 PetriNetUnfolderBase]: 358/625 cut-off events. [2024-06-27 20:45:24,658 INFO L125 PetriNetUnfolderBase]: For 21883/21883 co-relation queries the response was YES. [2024-06-27 20:45:24,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3910 conditions, 625 events. 358/625 cut-off events. For 21883/21883 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2561 event pairs, 78 based on Foata normal form. 2/625 useless extension candidates. Maximal degree in co-relation 3849. Up to 589 conditions per place. [2024-06-27 20:45:24,663 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 100 selfloop transitions, 14 changer transitions 0/116 dead transitions. [2024-06-27 20:45:24,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 116 transitions, 1219 flow [2024-06-27 20:45:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:24,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:24,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-27 20:45:24,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:45:24,669 INFO L175 Difference]: Start difference. First operand has 122 places, 102 transitions, 945 flow. Second operand 9 states and 99 transitions. [2024-06-27 20:45:24,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 116 transitions, 1219 flow [2024-06-27 20:45:24,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 116 transitions, 1164 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:45:24,718 INFO L231 Difference]: Finished difference. Result has 123 places, 104 transitions, 947 flow [2024-06-27 20:45:24,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=947, PETRI_PLACES=123, PETRI_TRANSITIONS=104} [2024-06-27 20:45:24,719 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2024-06-27 20:45:24,719 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 104 transitions, 947 flow [2024-06-27 20:45:24,720 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) [2024-06-27 20:45:24,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:24,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:24,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:45:24,720 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)] === [2024-06-27 20:45:24,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:24,722 INFO L85 PathProgramCache]: Analyzing trace with hash -989103259, now seen corresponding path program 7 times [2024-06-27 20:45:24,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:24,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37882012] [2024-06-27 20:45:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:24,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:25,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:25,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37882012] [2024-06-27 20:45:25,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37882012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:25,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:25,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:25,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884317766] [2024-06-27 20:45:25,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:25,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:25,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:25,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:25,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:25,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:25,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 104 transitions, 947 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) [2024-06-27 20:45:25,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:25,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:25,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:25,929 INFO L124 PetriNetUnfolderBase]: 364/635 cut-off events. [2024-06-27 20:45:25,929 INFO L125 PetriNetUnfolderBase]: For 22920/22920 co-relation queries the response was YES. [2024-06-27 20:45:25,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3978 conditions, 635 events. 364/635 cut-off events. For 22920/22920 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2613 event pairs, 70 based on Foata normal form. 2/635 useless extension candidates. Maximal degree in co-relation 3916. Up to 517 conditions per place. [2024-06-27 20:45:25,933 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 92 selfloop transitions, 28 changer transitions 0/122 dead transitions. [2024-06-27 20:45:25,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 122 transitions, 1323 flow [2024-06-27 20:45:25,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-27 20:45:25,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-27 20:45:25,937 INFO L175 Difference]: Start difference. First operand has 123 places, 104 transitions, 947 flow. Second operand 9 states and 109 transitions. [2024-06-27 20:45:25,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 122 transitions, 1323 flow [2024-06-27 20:45:25,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 122 transitions, 1282 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:25,987 INFO L231 Difference]: Finished difference. Result has 125 places, 106 transitions, 995 flow [2024-06-27 20:45:25,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=995, PETRI_PLACES=125, PETRI_TRANSITIONS=106} [2024-06-27 20:45:25,987 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2024-06-27 20:45:25,988 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 106 transitions, 995 flow [2024-06-27 20:45:25,988 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) [2024-06-27 20:45:25,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:25,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:25,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:45:25,988 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)] === [2024-06-27 20:45:25,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:25,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2136677784, now seen corresponding path program 5 times [2024-06-27 20:45:25,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:25,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96345993] [2024-06-27 20:45:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:25,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:26,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:26,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96345993] [2024-06-27 20:45:26,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96345993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:26,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:26,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72260112] [2024-06-27 20:45:26,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:26,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:26,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:26,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:27,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:27,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 106 transitions, 995 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) [2024-06-27 20:45:27,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:27,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:27,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:27,397 INFO L124 PetriNetUnfolderBase]: 370/645 cut-off events. [2024-06-27 20:45:27,397 INFO L125 PetriNetUnfolderBase]: For 24377/24377 co-relation queries the response was YES. [2024-06-27 20:45:27,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4104 conditions, 645 events. 370/645 cut-off events. For 24377/24377 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2680 event pairs, 80 based on Foata normal form. 2/645 useless extension candidates. Maximal degree in co-relation 4041. Up to 605 conditions per place. [2024-06-27 20:45:27,402 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 104 selfloop transitions, 15 changer transitions 0/121 dead transitions. [2024-06-27 20:45:27,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 121 transitions, 1285 flow [2024-06-27 20:45:27,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:27,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:27,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-27 20:45:27,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-27 20:45:27,405 INFO L175 Difference]: Start difference. First operand has 125 places, 106 transitions, 995 flow. Second operand 9 states and 101 transitions. [2024-06-27 20:45:27,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 121 transitions, 1285 flow [2024-06-27 20:45:27,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 121 transitions, 1150 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 20:45:27,463 INFO L231 Difference]: Finished difference. Result has 125 places, 108 transitions, 921 flow [2024-06-27 20:45:27,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=921, PETRI_PLACES=125, PETRI_TRANSITIONS=108} [2024-06-27 20:45:27,464 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2024-06-27 20:45:27,464 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 108 transitions, 921 flow [2024-06-27 20:45:27,464 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) [2024-06-27 20:45:27,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:27,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:27,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:45:27,465 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)] === [2024-06-27 20:45:27,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:27,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2129326134, now seen corresponding path program 6 times [2024-06-27 20:45:27,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:27,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151430748] [2024-06-27 20:45:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:27,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:28,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:28,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151430748] [2024-06-27 20:45:28,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151430748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:28,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:28,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:28,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426878919] [2024-06-27 20:45:28,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:28,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:28,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:28,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:28,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:28,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:28,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 108 transitions, 921 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) [2024-06-27 20:45:28,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:28,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:28,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:28,686 INFO L124 PetriNetUnfolderBase]: 376/655 cut-off events. [2024-06-27 20:45:28,687 INFO L125 PetriNetUnfolderBase]: For 25389/25389 co-relation queries the response was YES. [2024-06-27 20:45:28,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3992 conditions, 655 events. 376/655 cut-off events. For 25389/25389 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2740 event pairs, 76 based on Foata normal form. 2/655 useless extension candidates. Maximal degree in co-relation 3930. Up to 571 conditions per place. [2024-06-27 20:45:28,693 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 96 selfloop transitions, 26 changer transitions 0/124 dead transitions. [2024-06-27 20:45:28,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 124 transitions, 1299 flow [2024-06-27 20:45:28,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:28,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-27 20:45:28,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-27 20:45:28,694 INFO L175 Difference]: Start difference. First operand has 125 places, 108 transitions, 921 flow. Second operand 9 states and 105 transitions. [2024-06-27 20:45:28,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 124 transitions, 1299 flow [2024-06-27 20:45:28,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 124 transitions, 1258 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:28,751 INFO L231 Difference]: Finished difference. Result has 127 places, 110 transitions, 963 flow [2024-06-27 20:45:28,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=963, PETRI_PLACES=127, PETRI_TRANSITIONS=110} [2024-06-27 20:45:28,752 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-06-27 20:45:28,752 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 110 transitions, 963 flow [2024-06-27 20:45:28,752 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) [2024-06-27 20:45:28,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:28,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:28,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:45:28,753 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)] === [2024-06-27 20:45:28,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:28,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2129325917, now seen corresponding path program 8 times [2024-06-27 20:45:28,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:28,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492987135] [2024-06-27 20:45:28,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:28,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:29,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:29,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492987135] [2024-06-27 20:45:29,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492987135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:29,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:29,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:29,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357505725] [2024-06-27 20:45:29,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:29,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:29,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:29,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:29,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:29,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:29,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 110 transitions, 963 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) [2024-06-27 20:45:29,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:29,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:29,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:29,912 INFO L124 PetriNetUnfolderBase]: 382/665 cut-off events. [2024-06-27 20:45:29,913 INFO L125 PetriNetUnfolderBase]: For 26744/26744 co-relation queries the response was YES. [2024-06-27 20:45:29,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4098 conditions, 665 events. 382/665 cut-off events. For 26744/26744 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2784 event pairs, 70 based on Foata normal form. 2/665 useless extension candidates. Maximal degree in co-relation 4035. Up to 543 conditions per place. [2024-06-27 20:45:29,916 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 98 selfloop transitions, 28 changer transitions 0/128 dead transitions. [2024-06-27 20:45:29,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 128 transitions, 1351 flow [2024-06-27 20:45:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-27 20:45:29,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-27 20:45:29,918 INFO L175 Difference]: Start difference. First operand has 127 places, 110 transitions, 963 flow. Second operand 9 states and 109 transitions. [2024-06-27 20:45:29,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 128 transitions, 1351 flow [2024-06-27 20:45:29,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 128 transitions, 1248 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 20:45:29,968 INFO L231 Difference]: Finished difference. Result has 128 places, 112 transitions, 943 flow [2024-06-27 20:45:29,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=943, PETRI_PLACES=128, PETRI_TRANSITIONS=112} [2024-06-27 20:45:29,968 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-27 20:45:29,968 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 112 transitions, 943 flow [2024-06-27 20:45:29,969 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) [2024-06-27 20:45:29,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:29,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:29,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:45:29,969 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)] === [2024-06-27 20:45:29,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:29,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1413587231, now seen corresponding path program 9 times [2024-06-27 20:45:29,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:29,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931754295] [2024-06-27 20:45:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:29,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:30,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:30,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931754295] [2024-06-27 20:45:30,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931754295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:30,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:30,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:30,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798737386] [2024-06-27 20:45:30,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:30,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:30,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:30,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:30,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:30,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:30,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 112 transitions, 943 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) [2024-06-27 20:45:30,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:30,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:30,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:31,123 INFO L124 PetriNetUnfolderBase]: 391/680 cut-off events. [2024-06-27 20:45:31,124 INFO L125 PetriNetUnfolderBase]: For 28723/28723 co-relation queries the response was YES. [2024-06-27 20:45:31,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4097 conditions, 680 events. 391/680 cut-off events. For 28723/28723 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2883 event pairs, 80 based on Foata normal form. 3/681 useless extension candidates. Maximal degree in co-relation 4034. Up to 635 conditions per place. [2024-06-27 20:45:31,128 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 110 selfloop transitions, 16 changer transitions 0/128 dead transitions. [2024-06-27 20:45:31,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 128 transitions, 1249 flow [2024-06-27 20:45:31,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:31,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-27 20:45:31,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-27 20:45:31,138 INFO L175 Difference]: Start difference. First operand has 128 places, 112 transitions, 943 flow. Second operand 9 states and 102 transitions. [2024-06-27 20:45:31,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 128 transitions, 1249 flow [2024-06-27 20:45:31,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 128 transitions, 1195 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:31,208 INFO L231 Difference]: Finished difference. Result has 131 places, 115 transitions, 957 flow [2024-06-27 20:45:31,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=957, PETRI_PLACES=131, PETRI_TRANSITIONS=115} [2024-06-27 20:45:31,209 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-06-27 20:45:31,209 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 115 transitions, 957 flow [2024-06-27 20:45:31,209 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) [2024-06-27 20:45:31,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:31,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:31,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:45:31,210 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)] === [2024-06-27 20:45:31,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2129527944, now seen corresponding path program 7 times [2024-06-27 20:45:31,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:31,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896229592] [2024-06-27 20:45:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:31,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:32,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:32,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896229592] [2024-06-27 20:45:32,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896229592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:32,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:32,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:32,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610206506] [2024-06-27 20:45:32,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:32,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:32,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:32,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:32,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:32,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:32,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 115 transitions, 957 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) [2024-06-27 20:45:32,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:32,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:32,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:32,674 INFO L124 PetriNetUnfolderBase]: 387/674 cut-off events. [2024-06-27 20:45:32,674 INFO L125 PetriNetUnfolderBase]: For 27603/27603 co-relation queries the response was YES. [2024-06-27 20:45:32,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 674 events. 387/674 cut-off events. For 27603/27603 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2847 event pairs, 77 based on Foata normal form. 2/674 useless extension candidates. Maximal degree in co-relation 3990. Up to 622 conditions per place. [2024-06-27 20:45:32,678 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 109 selfloop transitions, 20 changer transitions 0/131 dead transitions. [2024-06-27 20:45:32,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 131 transitions, 1260 flow [2024-06-27 20:45:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:32,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-27 20:45:32,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-27 20:45:32,679 INFO L175 Difference]: Start difference. First operand has 131 places, 115 transitions, 957 flow. Second operand 10 states and 112 transitions. [2024-06-27 20:45:32,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 131 transitions, 1260 flow [2024-06-27 20:45:32,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 131 transitions, 1218 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:32,716 INFO L231 Difference]: Finished difference. Result has 135 places, 117 transitions, 976 flow [2024-06-27 20:45:32,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=976, PETRI_PLACES=135, PETRI_TRANSITIONS=117} [2024-06-27 20:45:32,716 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-27 20:45:32,716 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 117 transitions, 976 flow [2024-06-27 20:45:32,717 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) [2024-06-27 20:45:32,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:32,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:32,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:45:32,717 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)] === [2024-06-27 20:45:32,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:32,718 INFO L85 PathProgramCache]: Analyzing trace with hash 2129527727, now seen corresponding path program 10 times [2024-06-27 20:45:32,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:32,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696994706] [2024-06-27 20:45:32,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:32,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:33,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:33,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696994706] [2024-06-27 20:45:33,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696994706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:33,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:33,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:33,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840573923] [2024-06-27 20:45:33,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:33,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:33,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:33,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:33,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:33,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:33,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 117 transitions, 976 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) [2024-06-27 20:45:33,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:33,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:33,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:33,872 INFO L124 PetriNetUnfolderBase]: 390/680 cut-off events. [2024-06-27 20:45:33,872 INFO L125 PetriNetUnfolderBase]: For 29763/29763 co-relation queries the response was YES. [2024-06-27 20:45:33,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4031 conditions, 680 events. 390/680 cut-off events. For 29763/29763 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2885 event pairs, 73 based on Foata normal form. 6/684 useless extension candidates. Maximal degree in co-relation 3965. Up to 612 conditions per place. [2024-06-27 20:45:33,876 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 113 selfloop transitions, 20 changer transitions 0/135 dead transitions. [2024-06-27 20:45:33,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 135 transitions, 1318 flow [2024-06-27 20:45:33,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:33,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-27 20:45:33,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835125448028674 [2024-06-27 20:45:33,877 INFO L175 Difference]: Start difference. First operand has 135 places, 117 transitions, 976 flow. Second operand 9 states and 107 transitions. [2024-06-27 20:45:33,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 135 transitions, 1318 flow [2024-06-27 20:45:33,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 135 transitions, 1236 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 20:45:33,918 INFO L231 Difference]: Finished difference. Result has 135 places, 120 transitions, 984 flow [2024-06-27 20:45:33,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=984, PETRI_PLACES=135, PETRI_TRANSITIONS=120} [2024-06-27 20:45:33,918 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-27 20:45:33,918 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 120 transitions, 984 flow [2024-06-27 20:45:33,919 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) [2024-06-27 20:45:33,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:33,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:33,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:45:33,919 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)] === [2024-06-27 20:45:33,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:33,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1689250213, now seen corresponding path program 1 times [2024-06-27 20:45:33,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:33,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18710229] [2024-06-27 20:45:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:33,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:35,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:35,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18710229] [2024-06-27 20:45:35,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18710229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:35,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:35,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:35,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647530222] [2024-06-27 20:45:35,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:35,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:35,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:35,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:35,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:35,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:35,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 120 transitions, 984 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) [2024-06-27 20:45:35,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:35,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:35,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:35,572 INFO L124 PetriNetUnfolderBase]: 401/701 cut-off events. [2024-06-27 20:45:35,572 INFO L125 PetriNetUnfolderBase]: For 29567/29567 co-relation queries the response was YES. [2024-06-27 20:45:35,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4184 conditions, 701 events. 401/701 cut-off events. For 29567/29567 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3015 event pairs, 47 based on Foata normal form. 2/701 useless extension candidates. Maximal degree in co-relation 4118. Up to 614 conditions per place. [2024-06-27 20:45:35,576 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 127 selfloop transitions, 16 changer transitions 0/145 dead transitions. [2024-06-27 20:45:35,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 145 transitions, 1444 flow [2024-06-27 20:45:35,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:35,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-27 20:45:35,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-27 20:45:35,578 INFO L175 Difference]: Start difference. First operand has 135 places, 120 transitions, 984 flow. Second operand 10 states and 117 transitions. [2024-06-27 20:45:35,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 145 transitions, 1444 flow [2024-06-27 20:45:35,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 145 transitions, 1392 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:35,623 INFO L231 Difference]: Finished difference. Result has 138 places, 122 transitions, 994 flow [2024-06-27 20:45:35,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=994, PETRI_PLACES=138, PETRI_TRANSITIONS=122} [2024-06-27 20:45:35,624 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 108 predicate places. [2024-06-27 20:45:35,624 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 122 transitions, 994 flow [2024-06-27 20:45:35,624 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) [2024-06-27 20:45:35,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:35,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:35,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:45:35,624 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)] === [2024-06-27 20:45:35,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:35,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1956604691, now seen corresponding path program 2 times [2024-06-27 20:45:35,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:35,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293658734] [2024-06-27 20:45:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:35,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:36,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:36,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293658734] [2024-06-27 20:45:36,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293658734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:36,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:36,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:36,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698343526] [2024-06-27 20:45:36,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:36,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:36,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:36,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:36,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:36,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:36,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 122 transitions, 994 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) [2024-06-27 20:45:36,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:36,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:36,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:37,032 INFO L124 PetriNetUnfolderBase]: 398/696 cut-off events. [2024-06-27 20:45:37,032 INFO L125 PetriNetUnfolderBase]: For 28754/28754 co-relation queries the response was YES. [2024-06-27 20:45:37,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4073 conditions, 696 events. 398/696 cut-off events. For 28754/28754 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2993 event pairs, 63 based on Foata normal form. 2/696 useless extension candidates. Maximal degree in co-relation 4006. Up to 638 conditions per place. [2024-06-27 20:45:37,037 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 126 selfloop transitions, 14 changer transitions 0/142 dead transitions. [2024-06-27 20:45:37,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 142 transitions, 1332 flow [2024-06-27 20:45:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-27 20:45:37,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835125448028674 [2024-06-27 20:45:37,038 INFO L175 Difference]: Start difference. First operand has 138 places, 122 transitions, 994 flow. Second operand 9 states and 107 transitions. [2024-06-27 20:45:37,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 142 transitions, 1332 flow [2024-06-27 20:45:37,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 142 transitions, 1293 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:37,080 INFO L231 Difference]: Finished difference. Result has 141 places, 122 transitions, 987 flow [2024-06-27 20:45:37,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=987, PETRI_PLACES=141, PETRI_TRANSITIONS=122} [2024-06-27 20:45:37,081 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 111 predicate places. [2024-06-27 20:45:37,081 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 122 transitions, 987 flow [2024-06-27 20:45:37,082 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) [2024-06-27 20:45:37,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:37,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:37,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:45:37,082 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)] === [2024-06-27 20:45:37,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:37,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1250535369, now seen corresponding path program 1 times [2024-06-27 20:45:37,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:37,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224633230] [2024-06-27 20:45:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:37,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:38,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:38,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224633230] [2024-06-27 20:45:38,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224633230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:38,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:38,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:38,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114826794] [2024-06-27 20:45:38,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:38,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:38,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:38,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:38,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:38,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:38,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 122 transitions, 987 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) [2024-06-27 20:45:38,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:38,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:38,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:38,476 INFO L124 PetriNetUnfolderBase]: 420/732 cut-off events. [2024-06-27 20:45:38,476 INFO L125 PetriNetUnfolderBase]: For 34255/34255 co-relation queries the response was YES. [2024-06-27 20:45:38,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4352 conditions, 732 events. 420/732 cut-off events. For 34255/34255 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3178 event pairs, 67 based on Foata normal form. 4/734 useless extension candidates. Maximal degree in co-relation 4283. Up to 649 conditions per place. [2024-06-27 20:45:38,480 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 129 selfloop transitions, 20 changer transitions 0/151 dead transitions. [2024-06-27 20:45:38,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 151 transitions, 1503 flow [2024-06-27 20:45:38,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:38,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-27 20:45:38,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-27 20:45:38,481 INFO L175 Difference]: Start difference. First operand has 141 places, 122 transitions, 987 flow. Second operand 10 states and 122 transitions. [2024-06-27 20:45:38,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 151 transitions, 1503 flow [2024-06-27 20:45:38,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 151 transitions, 1473 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:45:38,527 INFO L231 Difference]: Finished difference. Result has 143 places, 127 transitions, 1069 flow [2024-06-27 20:45:38,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1069, PETRI_PLACES=143, PETRI_TRANSITIONS=127} [2024-06-27 20:45:38,528 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2024-06-27 20:45:38,528 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 127 transitions, 1069 flow [2024-06-27 20:45:38,528 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) [2024-06-27 20:45:38,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:38,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:38,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:45:38,528 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)] === [2024-06-27 20:45:38,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:38,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1135064709, now seen corresponding path program 2 times [2024-06-27 20:45:38,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:38,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235432285] [2024-06-27 20:45:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:38,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:39,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:39,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235432285] [2024-06-27 20:45:39,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235432285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:39,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:39,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:39,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846841607] [2024-06-27 20:45:39,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:39,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:39,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:39,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:39,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:39,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 127 transitions, 1069 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) [2024-06-27 20:45:39,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:39,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:39,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:39,974 INFO L124 PetriNetUnfolderBase]: 476/822 cut-off events. [2024-06-27 20:45:39,974 INFO L125 PetriNetUnfolderBase]: For 44683/44683 co-relation queries the response was YES. [2024-06-27 20:45:39,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5403 conditions, 822 events. 476/822 cut-off events. For 44683/44683 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3666 event pairs, 58 based on Foata normal form. 2/822 useless extension candidates. Maximal degree in co-relation 5333. Up to 367 conditions per place. [2024-06-27 20:45:39,980 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 92 selfloop transitions, 68 changer transitions 0/162 dead transitions. [2024-06-27 20:45:39,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 162 transitions, 1865 flow [2024-06-27 20:45:39,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:39,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-06-27 20:45:39,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43870967741935485 [2024-06-27 20:45:39,981 INFO L175 Difference]: Start difference. First operand has 143 places, 127 transitions, 1069 flow. Second operand 10 states and 136 transitions. [2024-06-27 20:45:39,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 162 transitions, 1865 flow [2024-06-27 20:45:40,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 162 transitions, 1810 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:40,046 INFO L231 Difference]: Finished difference. Result has 148 places, 136 transitions, 1301 flow [2024-06-27 20:45:40,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1301, PETRI_PLACES=148, PETRI_TRANSITIONS=136} [2024-06-27 20:45:40,047 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2024-06-27 20:45:40,047 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 136 transitions, 1301 flow [2024-06-27 20:45:40,047 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) [2024-06-27 20:45:40,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:40,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:40,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:45:40,048 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)] === [2024-06-27 20:45:40,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:40,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1135071219, now seen corresponding path program 3 times [2024-06-27 20:45:40,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:40,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106711685] [2024-06-27 20:45:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:40,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:41,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:41,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106711685] [2024-06-27 20:45:41,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106711685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:41,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:41,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:41,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318935024] [2024-06-27 20:45:41,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:41,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:41,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:41,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:41,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:41,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:41,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 136 transitions, 1301 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:41,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:41,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:41,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:41,476 INFO L124 PetriNetUnfolderBase]: 482/832 cut-off events. [2024-06-27 20:45:41,476 INFO L125 PetriNetUnfolderBase]: For 47728/47728 co-relation queries the response was YES. [2024-06-27 20:45:41,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5815 conditions, 832 events. 482/832 cut-off events. For 47728/47728 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3746 event pairs, 53 based on Foata normal form. 2/832 useless extension candidates. Maximal degree in co-relation 5742. Up to 535 conditions per place. [2024-06-27 20:45:41,482 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 131 selfloop transitions, 50 changer transitions 0/183 dead transitions. [2024-06-27 20:45:41,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 183 transitions, 2157 flow [2024-06-27 20:45:41,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-27 20:45:41,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-27 20:45:41,483 INFO L175 Difference]: Start difference. First operand has 148 places, 136 transitions, 1301 flow. Second operand 10 states and 131 transitions. [2024-06-27 20:45:41,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 183 transitions, 2157 flow [2024-06-27 20:45:41,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 183 transitions, 2066 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:41,558 INFO L231 Difference]: Finished difference. Result has 158 places, 151 transitions, 1556 flow [2024-06-27 20:45:41,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1556, PETRI_PLACES=158, PETRI_TRANSITIONS=151} [2024-06-27 20:45:41,558 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-06-27 20:45:41,558 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 151 transitions, 1556 flow [2024-06-27 20:45:41,559 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) [2024-06-27 20:45:41,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:41,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:41,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:45:41,559 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)] === [2024-06-27 20:45:41,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:41,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1135249159, now seen corresponding path program 3 times [2024-06-27 20:45:41,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:41,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616227491] [2024-06-27 20:45:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:41,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:42,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:42,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616227491] [2024-06-27 20:45:42,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616227491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:42,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:42,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:42,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253890234] [2024-06-27 20:45:42,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:42,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:42,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:42,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:42,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:42,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:42,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 151 transitions, 1556 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) [2024-06-27 20:45:42,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:42,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:42,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:42,907 INFO L124 PetriNetUnfolderBase]: 486/840 cut-off events. [2024-06-27 20:45:42,908 INFO L125 PetriNetUnfolderBase]: For 49499/49499 co-relation queries the response was YES. [2024-06-27 20:45:42,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6090 conditions, 840 events. 486/840 cut-off events. For 49499/49499 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3773 event pairs, 74 based on Foata normal form. 2/840 useless extension candidates. Maximal degree in co-relation 6011. Up to 746 conditions per place. [2024-06-27 20:45:42,916 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 137 selfloop transitions, 30 changer transitions 0/169 dead transitions. [2024-06-27 20:45:42,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 169 transitions, 1970 flow [2024-06-27 20:45:42,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:42,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:42,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-27 20:45:42,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-27 20:45:42,918 INFO L175 Difference]: Start difference. First operand has 158 places, 151 transitions, 1556 flow. Second operand 9 states and 110 transitions. [2024-06-27 20:45:42,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 169 transitions, 1970 flow [2024-06-27 20:45:42,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 169 transitions, 1909 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 20:45:42,998 INFO L231 Difference]: Finished difference. Result has 164 places, 152 transitions, 1585 flow [2024-06-27 20:45:42,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1585, PETRI_PLACES=164, PETRI_TRANSITIONS=152} [2024-06-27 20:45:42,999 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 134 predicate places. [2024-06-27 20:45:42,999 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 152 transitions, 1585 flow [2024-06-27 20:45:42,999 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) [2024-06-27 20:45:42,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:42,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:42,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:45:43,000 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)] === [2024-06-27 20:45:43,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:43,000 INFO L85 PathProgramCache]: Analyzing trace with hash -733335821, now seen corresponding path program 4 times [2024-06-27 20:45:43,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:43,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976972229] [2024-06-27 20:45:43,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:43,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:43,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:43,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976972229] [2024-06-27 20:45:43,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976972229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:43,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:43,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:43,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626190472] [2024-06-27 20:45:43,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:43,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:43,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:43,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:43,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:44,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:44,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 152 transitions, 1585 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) [2024-06-27 20:45:44,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:44,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:44,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:44,537 INFO L124 PetriNetUnfolderBase]: 498/860 cut-off events. [2024-06-27 20:45:44,537 INFO L125 PetriNetUnfolderBase]: For 53498/53498 co-relation queries the response was YES. [2024-06-27 20:45:44,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6239 conditions, 860 events. 498/860 cut-off events. For 53498/53498 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3900 event pairs, 63 based on Foata normal form. 4/862 useless extension candidates. Maximal degree in co-relation 6158. Up to 391 conditions per place. [2024-06-27 20:45:44,543 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 106 selfloop transitions, 75 changer transitions 0/183 dead transitions. [2024-06-27 20:45:44,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 183 transitions, 2475 flow [2024-06-27 20:45:44,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:44,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-06-27 20:45:44,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45483870967741935 [2024-06-27 20:45:44,545 INFO L175 Difference]: Start difference. First operand has 164 places, 152 transitions, 1585 flow. Second operand 10 states and 141 transitions. [2024-06-27 20:45:44,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 183 transitions, 2475 flow [2024-06-27 20:45:44,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 183 transitions, 2389 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:44,631 INFO L231 Difference]: Finished difference. Result has 167 places, 156 transitions, 1718 flow [2024-06-27 20:45:44,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1718, PETRI_PLACES=167, PETRI_TRANSITIONS=156} [2024-06-27 20:45:44,631 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2024-06-27 20:45:44,632 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 156 transitions, 1718 flow [2024-06-27 20:45:44,632 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) [2024-06-27 20:45:44,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:44,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:44,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:45:44,632 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)] === [2024-06-27 20:45:44,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:44,633 INFO L85 PathProgramCache]: Analyzing trace with hash -969610025, now seen corresponding path program 4 times [2024-06-27 20:45:44,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:44,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551399128] [2024-06-27 20:45:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:44,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:45,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:45,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551399128] [2024-06-27 20:45:45,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551399128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:45,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:45,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:45,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922495763] [2024-06-27 20:45:45,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:45,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:45,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:45,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:45,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:45,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:45,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 156 transitions, 1718 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) [2024-06-27 20:45:45,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:45,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:45,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:46,190 INFO L124 PetriNetUnfolderBase]: 502/868 cut-off events. [2024-06-27 20:45:46,190 INFO L125 PetriNetUnfolderBase]: For 53988/53988 co-relation queries the response was YES. [2024-06-27 20:45:46,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6443 conditions, 868 events. 502/868 cut-off events. For 53988/53988 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3938 event pairs, 84 based on Foata normal form. 2/868 useless extension candidates. Maximal degree in co-relation 6361. Up to 827 conditions per place. [2024-06-27 20:45:46,197 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 151 selfloop transitions, 19 changer transitions 0/172 dead transitions. [2024-06-27 20:45:46,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 172 transitions, 2124 flow [2024-06-27 20:45:46,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:46,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-27 20:45:46,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:45:46,198 INFO L175 Difference]: Start difference. First operand has 167 places, 156 transitions, 1718 flow. Second operand 10 states and 110 transitions. [2024-06-27 20:45:46,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 172 transitions, 2124 flow [2024-06-27 20:45:46,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 172 transitions, 1957 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:46,290 INFO L231 Difference]: Finished difference. Result has 172 places, 159 transitions, 1634 flow [2024-06-27 20:45:46,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1634, PETRI_PLACES=172, PETRI_TRANSITIONS=159} [2024-06-27 20:45:46,290 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-06-27 20:45:46,290 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 159 transitions, 1634 flow [2024-06-27 20:45:46,291 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) [2024-06-27 20:45:46,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:46,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:46,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:45:46,291 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)] === [2024-06-27 20:45:46,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:46,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1973042437, now seen corresponding path program 5 times [2024-06-27 20:45:46,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:46,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6280434] [2024-06-27 20:45:46,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:46,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:47,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:47,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6280434] [2024-06-27 20:45:47,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6280434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:47,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:47,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:47,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501608232] [2024-06-27 20:45:47,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:47,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:47,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:47,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:47,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:47,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:47,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 159 transitions, 1634 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) [2024-06-27 20:45:47,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:47,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:47,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:47,711 INFO L124 PetriNetUnfolderBase]: 518/894 cut-off events. [2024-06-27 20:45:47,711 INFO L125 PetriNetUnfolderBase]: For 58194/58194 co-relation queries the response was YES. [2024-06-27 20:45:47,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6568 conditions, 894 events. 518/894 cut-off events. For 58194/58194 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4127 event pairs, 70 based on Foata normal form. 2/894 useless extension candidates. Maximal degree in co-relation 6484. Up to 764 conditions per place. [2024-06-27 20:45:47,718 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 150 selfloop transitions, 34 changer transitions 0/186 dead transitions. [2024-06-27 20:45:47,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 186 transitions, 2249 flow [2024-06-27 20:45:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:47,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:47,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-27 20:45:47,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-27 20:45:47,719 INFO L175 Difference]: Start difference. First operand has 172 places, 159 transitions, 1634 flow. Second operand 10 states and 125 transitions. [2024-06-27 20:45:47,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 186 transitions, 2249 flow [2024-06-27 20:45:47,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 186 transitions, 2195 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:47,819 INFO L231 Difference]: Finished difference. Result has 176 places, 165 transitions, 1749 flow [2024-06-27 20:45:47,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1749, PETRI_PLACES=176, PETRI_TRANSITIONS=165} [2024-06-27 20:45:47,819 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 146 predicate places. [2024-06-27 20:45:47,819 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 165 transitions, 1749 flow [2024-06-27 20:45:47,820 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) [2024-06-27 20:45:47,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:47,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:47,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:45:47,820 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)] === [2024-06-27 20:45:47,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:47,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1973221927, now seen corresponding path program 6 times [2024-06-27 20:45:47,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:47,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27664810] [2024-06-27 20:45:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:47,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:48,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:48,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27664810] [2024-06-27 20:45:48,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27664810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:48,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:48,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:48,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415438070] [2024-06-27 20:45:48,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:48,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:48,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:48,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:48,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:48,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:48,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 165 transitions, 1749 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) [2024-06-27 20:45:48,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:48,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:48,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:49,295 INFO L124 PetriNetUnfolderBase]: 534/920 cut-off events. [2024-06-27 20:45:49,295 INFO L125 PetriNetUnfolderBase]: For 63733/63733 co-relation queries the response was YES. [2024-06-27 20:45:49,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6963 conditions, 920 events. 534/920 cut-off events. For 63733/63733 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4253 event pairs, 73 based on Foata normal form. 2/920 useless extension candidates. Maximal degree in co-relation 6877. Up to 779 conditions per place. [2024-06-27 20:45:49,301 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 152 selfloop transitions, 38 changer transitions 0/192 dead transitions. [2024-06-27 20:45:49,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 192 transitions, 2488 flow [2024-06-27 20:45:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-27 20:45:49,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-27 20:45:49,302 INFO L175 Difference]: Start difference. First operand has 176 places, 165 transitions, 1749 flow. Second operand 10 states and 127 transitions. [2024-06-27 20:45:49,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 192 transitions, 2488 flow [2024-06-27 20:45:49,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 192 transitions, 2405 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 20:45:49,398 INFO L231 Difference]: Finished difference. Result has 182 places, 171 transitions, 1853 flow [2024-06-27 20:45:49,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1853, PETRI_PLACES=182, PETRI_TRANSITIONS=171} [2024-06-27 20:45:49,399 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2024-06-27 20:45:49,399 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 171 transitions, 1853 flow [2024-06-27 20:45:49,399 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) [2024-06-27 20:45:49,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:49,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:49,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:45:49,400 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)] === [2024-06-27 20:45:49,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:49,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1973215417, now seen corresponding path program 7 times [2024-06-27 20:45:49,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:49,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945528130] [2024-06-27 20:45:49,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:49,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:50,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:50,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945528130] [2024-06-27 20:45:50,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945528130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:50,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:50,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:50,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261028414] [2024-06-27 20:45:50,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:50,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:50,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:50,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:50,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:50,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:50,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 171 transitions, 1853 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) [2024-06-27 20:45:50,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:50,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:50,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:50,902 INFO L124 PetriNetUnfolderBase]: 530/914 cut-off events. [2024-06-27 20:45:50,902 INFO L125 PetriNetUnfolderBase]: For 62808/62808 co-relation queries the response was YES. [2024-06-27 20:45:50,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6890 conditions, 914 events. 530/914 cut-off events. For 62808/62808 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4216 event pairs, 74 based on Foata normal form. 2/914 useless extension candidates. Maximal degree in co-relation 6801. Up to 776 conditions per place. [2024-06-27 20:45:50,909 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 153 selfloop transitions, 37 changer transitions 0/192 dead transitions. [2024-06-27 20:45:50,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 192 transitions, 2393 flow [2024-06-27 20:45:50,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-27 20:45:50,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-27 20:45:50,910 INFO L175 Difference]: Start difference. First operand has 182 places, 171 transitions, 1853 flow. Second operand 10 states and 128 transitions. [2024-06-27 20:45:50,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 192 transitions, 2393 flow [2024-06-27 20:45:51,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 192 transitions, 2306 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 20:45:51,026 INFO L231 Difference]: Finished difference. Result has 187 places, 171 transitions, 1845 flow [2024-06-27 20:45:51,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1845, PETRI_PLACES=187, PETRI_TRANSITIONS=171} [2024-06-27 20:45:51,027 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 157 predicate places. [2024-06-27 20:45:51,027 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 171 transitions, 1845 flow [2024-06-27 20:45:51,027 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) [2024-06-27 20:45:51,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:51,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:51,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:45:51,028 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)] === [2024-06-27 20:45:51,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:51,028 INFO L85 PathProgramCache]: Analyzing trace with hash -560426873, now seen corresponding path program 1 times [2024-06-27 20:45:51,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:51,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574835133] [2024-06-27 20:45:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:51,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:52,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:52,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574835133] [2024-06-27 20:45:52,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574835133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:52,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:52,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:52,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361808614] [2024-06-27 20:45:52,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:52,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:52,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:52,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:52,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:52,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:52,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 171 transitions, 1845 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) [2024-06-27 20:45:52,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:52,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:52,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:52,876 INFO L124 PetriNetUnfolderBase]: 534/922 cut-off events. [2024-06-27 20:45:52,876 INFO L125 PetriNetUnfolderBase]: For 65198/65198 co-relation queries the response was YES. [2024-06-27 20:45:52,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6934 conditions, 922 events. 534/922 cut-off events. For 65198/65198 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4289 event pairs, 80 based on Foata normal form. 2/922 useless extension candidates. Maximal degree in co-relation 6844. Up to 860 conditions per place. [2024-06-27 20:45:52,882 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 165 selfloop transitions, 21 changer transitions 0/188 dead transitions. [2024-06-27 20:45:52,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 188 transitions, 2281 flow [2024-06-27 20:45:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-27 20:45:52,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-27 20:45:52,883 INFO L175 Difference]: Start difference. First operand has 187 places, 171 transitions, 1845 flow. Second operand 9 states and 106 transitions. [2024-06-27 20:45:52,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 188 transitions, 2281 flow [2024-06-27 20:45:52,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 188 transitions, 2205 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:45:53,001 INFO L231 Difference]: Finished difference. Result has 189 places, 174 transitions, 1852 flow [2024-06-27 20:45:53,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1852, PETRI_PLACES=189, PETRI_TRANSITIONS=174} [2024-06-27 20:45:53,001 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2024-06-27 20:45:53,001 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 174 transitions, 1852 flow [2024-06-27 20:45:53,002 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) [2024-06-27 20:45:53,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:53,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:53,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:45:53,002 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)] === [2024-06-27 20:45:53,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:53,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1979478037, now seen corresponding path program 8 times [2024-06-27 20:45:53,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:53,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697147785] [2024-06-27 20:45:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:53,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:54,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:54,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697147785] [2024-06-27 20:45:54,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697147785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:54,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:54,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:54,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088838278] [2024-06-27 20:45:54,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:54,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:54,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:54,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:54,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:54,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:54,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 174 transitions, 1852 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) [2024-06-27 20:45:54,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:54,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:54,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:54,702 INFO L124 PetriNetUnfolderBase]: 560/964 cut-off events. [2024-06-27 20:45:54,702 INFO L125 PetriNetUnfolderBase]: For 73774/73774 co-relation queries the response was YES. [2024-06-27 20:45:54,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7432 conditions, 964 events. 560/964 cut-off events. For 73774/73774 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4521 event pairs, 78 based on Foata normal form. 2/964 useless extension candidates. Maximal degree in co-relation 7340. Up to 826 conditions per place. [2024-06-27 20:45:54,710 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 163 selfloop transitions, 35 changer transitions 0/200 dead transitions. [2024-06-27 20:45:54,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 200 transitions, 2634 flow [2024-06-27 20:45:54,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:54,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-27 20:45:54,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-27 20:45:54,711 INFO L175 Difference]: Start difference. First operand has 189 places, 174 transitions, 1852 flow. Second operand 10 states and 126 transitions. [2024-06-27 20:45:54,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 200 transitions, 2634 flow [2024-06-27 20:45:54,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 200 transitions, 2586 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:54,850 INFO L231 Difference]: Finished difference. Result has 193 places, 181 transitions, 2007 flow [2024-06-27 20:45:54,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2007, PETRI_PLACES=193, PETRI_TRANSITIONS=181} [2024-06-27 20:45:54,851 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 163 predicate places. [2024-06-27 20:45:54,851 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 181 transitions, 2007 flow [2024-06-27 20:45:54,851 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) [2024-06-27 20:45:54,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:54,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:54,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:45:54,851 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)] === [2024-06-27 20:45:54,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:54,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1979471527, now seen corresponding path program 9 times [2024-06-27 20:45:54,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:54,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043301923] [2024-06-27 20:45:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:54,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:56,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:56,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043301923] [2024-06-27 20:45:56,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043301923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:56,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:56,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:56,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164328783] [2024-06-27 20:45:56,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:56,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:56,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:56,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:56,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:56,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:56,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 181 transitions, 2007 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) [2024-06-27 20:45:56,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:56,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:56,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:56,593 INFO L124 PetriNetUnfolderBase]: 552/952 cut-off events. [2024-06-27 20:45:56,593 INFO L125 PetriNetUnfolderBase]: For 73103/73103 co-relation queries the response was YES. [2024-06-27 20:45:56,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7237 conditions, 952 events. 552/952 cut-off events. For 73103/73103 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4457 event pairs, 75 based on Foata normal form. 4/954 useless extension candidates. Maximal degree in co-relation 7144. Up to 822 conditions per place. [2024-06-27 20:45:56,602 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 163 selfloop transitions, 34 changer transitions 0/199 dead transitions. [2024-06-27 20:45:56,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 199 transitions, 2555 flow [2024-06-27 20:45:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:56,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:56,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-27 20:45:56,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:45:56,603 INFO L175 Difference]: Start difference. First operand has 193 places, 181 transitions, 2007 flow. Second operand 10 states and 124 transitions. [2024-06-27 20:45:56,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 199 transitions, 2555 flow [2024-06-27 20:45:56,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 199 transitions, 2456 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:56,729 INFO L231 Difference]: Finished difference. Result has 197 places, 181 transitions, 1983 flow [2024-06-27 20:45:56,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1983, PETRI_PLACES=197, PETRI_TRANSITIONS=181} [2024-06-27 20:45:56,730 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-27 20:45:56,730 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 181 transitions, 1983 flow [2024-06-27 20:45:56,730 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) [2024-06-27 20:45:56,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:56,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:56,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:45:56,731 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)] === [2024-06-27 20:45:56,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:56,731 INFO L85 PathProgramCache]: Analyzing trace with hash 157771655, now seen corresponding path program 5 times [2024-06-27 20:45:56,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:56,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481644361] [2024-06-27 20:45:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:56,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:58,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:58,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481644361] [2024-06-27 20:45:58,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481644361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:58,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:58,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:58,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359301904] [2024-06-27 20:45:58,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:58,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:58,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:58,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:58,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:58,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:58,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 181 transitions, 1983 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) [2024-06-27 20:45:58,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:58,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:58,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:58,459 INFO L124 PetriNetUnfolderBase]: 549/947 cut-off events. [2024-06-27 20:45:58,459 INFO L125 PetriNetUnfolderBase]: For 68976/68976 co-relation queries the response was YES. [2024-06-27 20:45:58,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7110 conditions, 947 events. 549/947 cut-off events. For 68976/68976 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4442 event pairs, 83 based on Foata normal form. 2/947 useless extension candidates. Maximal degree in co-relation 7016. Up to 918 conditions per place. [2024-06-27 20:45:58,465 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 175 selfloop transitions, 16 changer transitions 0/193 dead transitions. [2024-06-27 20:45:58,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 193 transitions, 2409 flow [2024-06-27 20:45:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-27 20:45:58,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-27 20:45:58,466 INFO L175 Difference]: Start difference. First operand has 197 places, 181 transitions, 1983 flow. Second operand 10 states and 105 transitions. [2024-06-27 20:45:58,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 193 transitions, 2409 flow [2024-06-27 20:45:58,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 193 transitions, 2342 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:45:58,588 INFO L231 Difference]: Finished difference. Result has 200 places, 183 transitions, 1979 flow [2024-06-27 20:45:58,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1916, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1979, PETRI_PLACES=200, PETRI_TRANSITIONS=183} [2024-06-27 20:45:58,588 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2024-06-27 20:45:58,588 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 183 transitions, 1979 flow [2024-06-27 20:45:58,589 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) [2024-06-27 20:45:58,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:58,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:58,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:45:58,589 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)] === [2024-06-27 20:45:58,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:58,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1229172601, now seen corresponding path program 2 times [2024-06-27 20:45:58,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:58,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798097995] [2024-06-27 20:45:58,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:58,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:59,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:59,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798097995] [2024-06-27 20:45:59,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798097995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:59,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:59,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:59,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497941521] [2024-06-27 20:45:59,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:59,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:59,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:59,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:59,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:59,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:45:59,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 183 transitions, 1979 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) [2024-06-27 20:45:59,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:59,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:45:59,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:00,005 INFO L124 PetriNetUnfolderBase]: 553/955 cut-off events. [2024-06-27 20:46:00,005 INFO L125 PetriNetUnfolderBase]: For 71276/71276 co-relation queries the response was YES. [2024-06-27 20:46:00,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7152 conditions, 955 events. 553/955 cut-off events. For 71276/71276 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4494 event pairs, 81 based on Foata normal form. 2/955 useless extension candidates. Maximal degree in co-relation 7056. Up to 926 conditions per place. [2024-06-27 20:46:00,014 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 180 selfloop transitions, 14 changer transitions 0/196 dead transitions. [2024-06-27 20:46:00,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 196 transitions, 2423 flow [2024-06-27 20:46:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:00,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:00,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-27 20:46:00,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-27 20:46:00,015 INFO L175 Difference]: Start difference. First operand has 200 places, 183 transitions, 1979 flow. Second operand 9 states and 97 transitions. [2024-06-27 20:46:00,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 196 transitions, 2423 flow [2024-06-27 20:46:00,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 196 transitions, 2338 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 20:46:00,149 INFO L231 Difference]: Finished difference. Result has 201 places, 186 transitions, 1967 flow [2024-06-27 20:46:00,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1967, PETRI_PLACES=201, PETRI_TRANSITIONS=186} [2024-06-27 20:46:00,150 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2024-06-27 20:46:00,150 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 186 transitions, 1967 flow [2024-06-27 20:46:00,150 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) [2024-06-27 20:46:00,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:00,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:00,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:46:00,150 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)] === [2024-06-27 20:46:00,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:00,150 INFO L85 PathProgramCache]: Analyzing trace with hash -590753819, now seen corresponding path program 3 times [2024-06-27 20:46:00,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:00,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704730977] [2024-06-27 20:46:00,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:00,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:01,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:01,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704730977] [2024-06-27 20:46:01,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704730977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:01,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:01,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:01,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715386477] [2024-06-27 20:46:01,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:01,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:01,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:01,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:01,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:01,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:01,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 186 transitions, 1967 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) [2024-06-27 20:46:01,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:01,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:01,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:01,787 INFO L124 PetriNetUnfolderBase]: 557/963 cut-off events. [2024-06-27 20:46:01,788 INFO L125 PetriNetUnfolderBase]: For 73510/73510 co-relation queries the response was YES. [2024-06-27 20:46:01,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7178 conditions, 963 events. 557/963 cut-off events. For 73510/73510 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4551 event pairs, 81 based on Foata normal form. 2/963 useless extension candidates. Maximal degree in co-relation 7081. Up to 922 conditions per place. [2024-06-27 20:46:01,795 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 179 selfloop transitions, 18 changer transitions 0/199 dead transitions. [2024-06-27 20:46:01,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 199 transitions, 2415 flow [2024-06-27 20:46:01,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:01,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-27 20:46:01,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-27 20:46:01,796 INFO L175 Difference]: Start difference. First operand has 201 places, 186 transitions, 1967 flow. Second operand 9 states and 101 transitions. [2024-06-27 20:46:01,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 199 transitions, 2415 flow [2024-06-27 20:46:01,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 199 transitions, 2349 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 20:46:01,947 INFO L231 Difference]: Finished difference. Result has 202 places, 188 transitions, 1973 flow [2024-06-27 20:46:01,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1903, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1973, PETRI_PLACES=202, PETRI_TRANSITIONS=188} [2024-06-27 20:46:01,948 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2024-06-27 20:46:01,948 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 188 transitions, 1973 flow [2024-06-27 20:46:01,948 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) [2024-06-27 20:46:01,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:01,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:01,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:46:01,949 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)] === [2024-06-27 20:46:01,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:01,949 INFO L85 PathProgramCache]: Analyzing trace with hash 238537783, now seen corresponding path program 10 times [2024-06-27 20:46:01,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:01,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999755599] [2024-06-27 20:46:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:01,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:02,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:02,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999755599] [2024-06-27 20:46:02,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999755599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:02,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:02,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:02,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857283038] [2024-06-27 20:46:02,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:02,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:02,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:02,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:02,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:03,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:03,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 188 transitions, 1973 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) [2024-06-27 20:46:03,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:03,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:03,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:03,538 INFO L124 PetriNetUnfolderBase]: 573/989 cut-off events. [2024-06-27 20:46:03,538 INFO L125 PetriNetUnfolderBase]: For 79622/79622 co-relation queries the response was YES. [2024-06-27 20:46:03,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7441 conditions, 989 events. 573/989 cut-off events. For 79622/79622 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4719 event pairs, 78 based on Foata normal form. 2/989 useless extension candidates. Maximal degree in co-relation 7345. Up to 909 conditions per place. [2024-06-27 20:46:03,545 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 180 selfloop transitions, 27 changer transitions 0/209 dead transitions. [2024-06-27 20:46:03,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 209 transitions, 2640 flow [2024-06-27 20:46:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:03,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-27 20:46:03,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-27 20:46:03,546 INFO L175 Difference]: Start difference. First operand has 202 places, 188 transitions, 1973 flow. Second operand 10 states and 118 transitions. [2024-06-27 20:46:03,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 209 transitions, 2640 flow [2024-06-27 20:46:03,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 209 transitions, 2570 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 20:46:03,692 INFO L231 Difference]: Finished difference. Result has 204 places, 194 transitions, 2076 flow [2024-06-27 20:46:03,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1903, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2076, PETRI_PLACES=204, PETRI_TRANSITIONS=194} [2024-06-27 20:46:03,693 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2024-06-27 20:46:03,693 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 194 transitions, 2076 flow [2024-06-27 20:46:03,693 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) [2024-06-27 20:46:03,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:03,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:03,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:46:03,694 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)] === [2024-06-27 20:46:03,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:03,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1820785755, now seen corresponding path program 4 times [2024-06-27 20:46:03,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:03,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535196519] [2024-06-27 20:46:03,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:03,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:04,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:04,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535196519] [2024-06-27 20:46:04,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535196519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:04,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:04,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:04,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715214323] [2024-06-27 20:46:04,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:04,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:04,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:04,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:04,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:04,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:04,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 194 transitions, 2076 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) [2024-06-27 20:46:04,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:04,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:04,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:05,099 INFO L124 PetriNetUnfolderBase]: 577/997 cut-off events. [2024-06-27 20:46:05,099 INFO L125 PetriNetUnfolderBase]: For 82396/82396 co-relation queries the response was YES. [2024-06-27 20:46:05,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7552 conditions, 997 events. 577/997 cut-off events. For 82396/82396 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4750 event pairs, 78 based on Foata normal form. 2/997 useless extension candidates. Maximal degree in co-relation 7456. Up to 963 conditions per place. [2024-06-27 20:46:05,108 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 190 selfloop transitions, 14 changer transitions 0/206 dead transitions. [2024-06-27 20:46:05,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 206 transitions, 2522 flow [2024-06-27 20:46:05,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-27 20:46:05,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-27 20:46:05,108 INFO L175 Difference]: Start difference. First operand has 204 places, 194 transitions, 2076 flow. Second operand 9 states and 98 transitions. [2024-06-27 20:46:05,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 206 transitions, 2522 flow [2024-06-27 20:46:05,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 206 transitions, 2449 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:05,262 INFO L231 Difference]: Finished difference. Result has 208 places, 195 transitions, 2051 flow [2024-06-27 20:46:05,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2051, PETRI_PLACES=208, PETRI_TRANSITIONS=195} [2024-06-27 20:46:05,263 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-06-27 20:46:05,263 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 195 transitions, 2051 flow [2024-06-27 20:46:05,263 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) [2024-06-27 20:46:05,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:05,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:05,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:46:05,263 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)] === [2024-06-27 20:46:05,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:05,264 INFO L85 PathProgramCache]: Analyzing trace with hash -590999897, now seen corresponding path program 11 times [2024-06-27 20:46:05,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:05,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283927846] [2024-06-27 20:46:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:05,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:06,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:06,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283927846] [2024-06-27 20:46:06,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283927846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:06,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:06,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:06,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114595299] [2024-06-27 20:46:06,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:06,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:06,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:06,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:06,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:06,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:06,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 195 transitions, 2051 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) [2024-06-27 20:46:06,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:06,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:06,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:06,599 INFO L124 PetriNetUnfolderBase]: 589/1017 cut-off events. [2024-06-27 20:46:06,599 INFO L125 PetriNetUnfolderBase]: For 88723/88723 co-relation queries the response was YES. [2024-06-27 20:46:06,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7674 conditions, 1017 events. 589/1017 cut-off events. For 88723/88723 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4883 event pairs, 79 based on Foata normal form. 4/1019 useless extension candidates. Maximal degree in co-relation 7576. Up to 908 conditions per place. [2024-06-27 20:46:06,607 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 180 selfloop transitions, 32 changer transitions 0/214 dead transitions. [2024-06-27 20:46:06,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 214 transitions, 2707 flow [2024-06-27 20:46:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:06,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-27 20:46:06,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-27 20:46:06,608 INFO L175 Difference]: Start difference. First operand has 208 places, 195 transitions, 2051 flow. Second operand 10 states and 119 transitions. [2024-06-27 20:46:06,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 214 transitions, 2707 flow [2024-06-27 20:46:06,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 214 transitions, 2653 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:06,796 INFO L231 Difference]: Finished difference. Result has 211 places, 199 transitions, 2149 flow [2024-06-27 20:46:06,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2149, PETRI_PLACES=211, PETRI_TRANSITIONS=199} [2024-06-27 20:46:06,796 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-06-27 20:46:06,796 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 199 transitions, 2149 flow [2024-06-27 20:46:06,797 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) [2024-06-27 20:46:06,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:06,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:06,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:46:06,797 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)] === [2024-06-27 20:46:06,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:06,797 INFO L85 PathProgramCache]: Analyzing trace with hash -944081659, now seen corresponding path program 12 times [2024-06-27 20:46:06,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:06,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286867043] [2024-06-27 20:46:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:06,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:07,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:07,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286867043] [2024-06-27 20:46:07,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286867043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:07,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:07,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:07,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979788744] [2024-06-27 20:46:07,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:07,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:07,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:07,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:07,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:07,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:07,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 199 transitions, 2149 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) [2024-06-27 20:46:07,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:07,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:07,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:07,979 INFO L124 PetriNetUnfolderBase]: 581/1005 cut-off events. [2024-06-27 20:46:07,980 INFO L125 PetriNetUnfolderBase]: For 83706/83706 co-relation queries the response was YES. [2024-06-27 20:46:07,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7436 conditions, 1005 events. 581/1005 cut-off events. For 83706/83706 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4809 event pairs, 80 based on Foata normal form. 4/1007 useless extension candidates. Maximal degree in co-relation 7337. Up to 953 conditions per place. [2024-06-27 20:46:07,987 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 196 selfloop transitions, 17 changer transitions 0/215 dead transitions. [2024-06-27 20:46:07,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 215 transitions, 2643 flow [2024-06-27 20:46:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:07,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:07,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-27 20:46:07,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:46:07,989 INFO L175 Difference]: Start difference. First operand has 211 places, 199 transitions, 2149 flow. Second operand 10 states and 110 transitions. [2024-06-27 20:46:07,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 215 transitions, 2643 flow [2024-06-27 20:46:08,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 215 transitions, 2574 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:08,156 INFO L231 Difference]: Finished difference. Result has 215 places, 201 transitions, 2151 flow [2024-06-27 20:46:08,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2080, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2151, PETRI_PLACES=215, PETRI_TRANSITIONS=201} [2024-06-27 20:46:08,157 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 185 predicate places. [2024-06-27 20:46:08,157 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 201 transitions, 2151 flow [2024-06-27 20:46:08,157 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) [2024-06-27 20:46:08,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:08,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:08,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:46:08,158 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)] === [2024-06-27 20:46:08,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:08,158 INFO L85 PathProgramCache]: Analyzing trace with hash 468764491, now seen corresponding path program 5 times [2024-06-27 20:46:08,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:08,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835463897] [2024-06-27 20:46:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:08,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:09,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:09,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835463897] [2024-06-27 20:46:09,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835463897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:09,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:09,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:09,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275791926] [2024-06-27 20:46:09,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:09,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:09,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:09,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:09,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:09,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:09,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 201 transitions, 2151 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) [2024-06-27 20:46:09,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:09,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:09,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:09,517 INFO L124 PetriNetUnfolderBase]: 578/1000 cut-off events. [2024-06-27 20:46:09,517 INFO L125 PetriNetUnfolderBase]: For 77983/77983 co-relation queries the response was YES. [2024-06-27 20:46:09,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7304 conditions, 1000 events. 578/1000 cut-off events. For 77983/77983 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4787 event pairs, 77 based on Foata normal form. 2/1000 useless extension candidates. Maximal degree in co-relation 7203. Up to 966 conditions per place. [2024-06-27 20:46:09,529 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 197 selfloop transitions, 13 changer transitions 0/212 dead transitions. [2024-06-27 20:46:09,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 212 transitions, 2595 flow [2024-06-27 20:46:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-27 20:46:09,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-27 20:46:09,530 INFO L175 Difference]: Start difference. First operand has 215 places, 201 transitions, 2151 flow. Second operand 9 states and 96 transitions. [2024-06-27 20:46:09,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 212 transitions, 2595 flow [2024-06-27 20:46:09,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 212 transitions, 2540 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 20:46:09,714 INFO L231 Difference]: Finished difference. Result has 216 places, 201 transitions, 2126 flow [2024-06-27 20:46:09,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2126, PETRI_PLACES=216, PETRI_TRANSITIONS=201} [2024-06-27 20:46:09,715 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2024-06-27 20:46:09,715 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 201 transitions, 2126 flow [2024-06-27 20:46:09,715 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) [2024-06-27 20:46:09,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:09,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:09,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:46:09,715 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)] === [2024-06-27 20:46:09,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:09,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1229412169, now seen corresponding path program 13 times [2024-06-27 20:46:09,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:09,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440602809] [2024-06-27 20:46:09,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:09,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:10,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:10,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440602809] [2024-06-27 20:46:10,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440602809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:10,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:10,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:10,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017595691] [2024-06-27 20:46:10,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:10,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:10,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:10,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:10,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:10,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:10,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 201 transitions, 2126 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) [2024-06-27 20:46:10,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:10,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:10,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:11,213 INFO L124 PetriNetUnfolderBase]: 594/1026 cut-off events. [2024-06-27 20:46:11,213 INFO L125 PetriNetUnfolderBase]: For 85048/85048 co-relation queries the response was YES. [2024-06-27 20:46:11,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7610 conditions, 1026 events. 594/1026 cut-off events. For 85048/85048 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 4957 event pairs, 80 based on Foata normal form. 2/1026 useless extension candidates. Maximal degree in co-relation 7508. Up to 958 conditions per place. [2024-06-27 20:46:11,222 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 194 selfloop transitions, 23 changer transitions 0/219 dead transitions. [2024-06-27 20:46:11,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 219 transitions, 2804 flow [2024-06-27 20:46:11,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:11,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-27 20:46:11,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-27 20:46:11,223 INFO L175 Difference]: Start difference. First operand has 216 places, 201 transitions, 2126 flow. Second operand 10 states and 114 transitions. [2024-06-27 20:46:11,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 219 transitions, 2804 flow [2024-06-27 20:46:11,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 219 transitions, 2745 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 20:46:11,432 INFO L231 Difference]: Finished difference. Result has 218 places, 205 transitions, 2206 flow [2024-06-27 20:46:11,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2206, PETRI_PLACES=218, PETRI_TRANSITIONS=205} [2024-06-27 20:46:11,433 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 188 predicate places. [2024-06-27 20:46:11,433 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 205 transitions, 2206 flow [2024-06-27 20:46:11,433 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) [2024-06-27 20:46:11,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:11,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:11,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:46:11,433 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)] === [2024-06-27 20:46:11,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:11,434 INFO L85 PathProgramCache]: Analyzing trace with hash -597428987, now seen corresponding path program 14 times [2024-06-27 20:46:11,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:11,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811419846] [2024-06-27 20:46:11,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:11,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:12,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:12,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811419846] [2024-06-27 20:46:12,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811419846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:12,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:12,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:12,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460155920] [2024-06-27 20:46:12,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:12,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:12,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:12,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:12,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:12,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:12,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 205 transitions, 2206 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) [2024-06-27 20:46:12,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:12,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:12,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:12,901 INFO L124 PetriNetUnfolderBase]: 626/1078 cut-off events. [2024-06-27 20:46:12,902 INFO L125 PetriNetUnfolderBase]: For 101013/101013 co-relation queries the response was YES. [2024-06-27 20:46:12,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8306 conditions, 1078 events. 626/1078 cut-off events. For 101013/101013 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5228 event pairs, 68 based on Foata normal form. 4/1080 useless extension candidates. Maximal degree in co-relation 8203. Up to 813 conditions per place. [2024-06-27 20:46:12,914 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 173 selfloop transitions, 56 changer transitions 0/231 dead transitions. [2024-06-27 20:46:12,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 231 transitions, 3172 flow [2024-06-27 20:46:12,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:12,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-27 20:46:12,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-27 20:46:12,915 INFO L175 Difference]: Start difference. First operand has 218 places, 205 transitions, 2206 flow. Second operand 10 states and 123 transitions. [2024-06-27 20:46:12,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 231 transitions, 3172 flow [2024-06-27 20:46:13,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 231 transitions, 3087 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:13,109 INFO L231 Difference]: Finished difference. Result has 221 places, 213 transitions, 2418 flow [2024-06-27 20:46:13,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2418, PETRI_PLACES=221, PETRI_TRANSITIONS=213} [2024-06-27 20:46:13,109 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2024-06-27 20:46:13,109 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 213 transitions, 2418 flow [2024-06-27 20:46:13,109 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) [2024-06-27 20:46:13,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:13,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:13,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:46:13,110 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)] === [2024-06-27 20:46:13,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:13,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1229418865, now seen corresponding path program 1 times [2024-06-27 20:46:13,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:13,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992141246] [2024-06-27 20:46:13,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:13,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:14,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:14,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992141246] [2024-06-27 20:46:14,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992141246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:14,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:14,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:14,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778085760] [2024-06-27 20:46:14,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:14,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:14,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:14,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:14,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:14,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 213 transitions, 2418 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) [2024-06-27 20:46:14,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:14,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:14,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:14,520 INFO L124 PetriNetUnfolderBase]: 620/1069 cut-off events. [2024-06-27 20:46:14,520 INFO L125 PetriNetUnfolderBase]: For 95563/95563 co-relation queries the response was YES. [2024-06-27 20:46:14,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8160 conditions, 1069 events. 620/1069 cut-off events. For 95563/95563 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5182 event pairs, 91 based on Foata normal form. 3/1070 useless extension candidates. Maximal degree in co-relation 8056. Up to 1013 conditions per place. [2024-06-27 20:46:14,534 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 202 selfloop transitions, 20 changer transitions 0/224 dead transitions. [2024-06-27 20:46:14,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 224 transitions, 2886 flow [2024-06-27 20:46:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-27 20:46:14,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36917562724014336 [2024-06-27 20:46:14,536 INFO L175 Difference]: Start difference. First operand has 221 places, 213 transitions, 2418 flow. Second operand 9 states and 103 transitions. [2024-06-27 20:46:14,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 224 transitions, 2886 flow [2024-06-27 20:46:14,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 224 transitions, 2730 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:14,790 INFO L231 Difference]: Finished difference. Result has 225 places, 213 transitions, 2310 flow [2024-06-27 20:46:14,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2310, PETRI_PLACES=225, PETRI_TRANSITIONS=213} [2024-06-27 20:46:14,790 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 195 predicate places. [2024-06-27 20:46:14,791 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 213 transitions, 2310 flow [2024-06-27 20:46:14,791 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) [2024-06-27 20:46:14,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:14,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:14,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:46:14,791 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)] === [2024-06-27 20:46:14,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:14,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1229418679, now seen corresponding path program 15 times [2024-06-27 20:46:14,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:14,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507154187] [2024-06-27 20:46:14,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:14,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:15,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:15,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507154187] [2024-06-27 20:46:15,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507154187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:15,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:15,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:15,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501558716] [2024-06-27 20:46:15,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:15,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:15,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:15,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:15,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:15,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:15,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 213 transitions, 2310 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) [2024-06-27 20:46:15,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:15,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:15,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:16,276 INFO L124 PetriNetUnfolderBase]: 632/1089 cut-off events. [2024-06-27 20:46:16,276 INFO L125 PetriNetUnfolderBase]: For 99794/99794 co-relation queries the response was YES. [2024-06-27 20:46:16,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8173 conditions, 1089 events. 632/1089 cut-off events. For 99794/99794 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5307 event pairs, 88 based on Foata normal form. 4/1091 useless extension candidates. Maximal degree in co-relation 8067. Up to 992 conditions per place. [2024-06-27 20:46:16,289 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 201 selfloop transitions, 28 changer transitions 0/231 dead transitions. [2024-06-27 20:46:16,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 231 transitions, 3002 flow [2024-06-27 20:46:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:16,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:16,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-27 20:46:16,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-27 20:46:16,291 INFO L175 Difference]: Start difference. First operand has 225 places, 213 transitions, 2310 flow. Second operand 10 states and 115 transitions. [2024-06-27 20:46:16,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 231 transitions, 3002 flow [2024-06-27 20:46:16,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 231 transitions, 2886 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 20:46:16,490 INFO L231 Difference]: Finished difference. Result has 225 places, 217 transitions, 2330 flow [2024-06-27 20:46:16,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2330, PETRI_PLACES=225, PETRI_TRANSITIONS=217} [2024-06-27 20:46:16,491 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 195 predicate places. [2024-06-27 20:46:16,491 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 217 transitions, 2330 flow [2024-06-27 20:46:16,491 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) [2024-06-27 20:46:16,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:16,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:16,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:46:16,491 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)] === [2024-06-27 20:46:16,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:16,492 INFO L85 PathProgramCache]: Analyzing trace with hash -597256007, now seen corresponding path program 16 times [2024-06-27 20:46:16,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:16,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511093577] [2024-06-27 20:46:16,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:16,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:17,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:17,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511093577] [2024-06-27 20:46:17,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511093577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:17,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:17,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:17,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474983678] [2024-06-27 20:46:17,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:17,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:17,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:17,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:17,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:17,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:17,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 217 transitions, 2330 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) [2024-06-27 20:46:17,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:17,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:17,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:17,897 INFO L124 PetriNetUnfolderBase]: 644/1109 cut-off events. [2024-06-27 20:46:17,897 INFO L125 PetriNetUnfolderBase]: For 102538/102538 co-relation queries the response was YES. [2024-06-27 20:46:17,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8312 conditions, 1109 events. 644/1109 cut-off events. For 102538/102538 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5422 event pairs, 79 based on Foata normal form. 4/1111 useless extension candidates. Maximal degree in co-relation 8206. Up to 831 conditions per place. [2024-06-27 20:46:17,905 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 179 selfloop transitions, 59 changer transitions 0/240 dead transitions. [2024-06-27 20:46:17,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 240 transitions, 3380 flow [2024-06-27 20:46:17,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-27 20:46:17,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-27 20:46:17,906 INFO L175 Difference]: Start difference. First operand has 225 places, 217 transitions, 2330 flow. Second operand 10 states and 126 transitions. [2024-06-27 20:46:17,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 240 transitions, 3380 flow [2024-06-27 20:46:18,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 240 transitions, 3334 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:18,135 INFO L231 Difference]: Finished difference. Result has 229 places, 221 transitions, 2493 flow [2024-06-27 20:46:18,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2493, PETRI_PLACES=229, PETRI_TRANSITIONS=221} [2024-06-27 20:46:18,136 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 199 predicate places. [2024-06-27 20:46:18,136 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 221 transitions, 2493 flow [2024-06-27 20:46:18,136 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) [2024-06-27 20:46:18,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:18,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:18,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:46:18,136 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)] === [2024-06-27 20:46:18,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:18,137 INFO L85 PathProgramCache]: Analyzing trace with hash -597249497, now seen corresponding path program 17 times [2024-06-27 20:46:18,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:18,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091590177] [2024-06-27 20:46:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:18,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:19,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:19,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091590177] [2024-06-27 20:46:19,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091590177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:19,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:19,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:19,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393365980] [2024-06-27 20:46:19,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:19,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:19,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:19,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:19,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:19,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:19,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 221 transitions, 2493 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) [2024-06-27 20:46:19,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:19,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:19,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:20,096 INFO L124 PetriNetUnfolderBase]: 640/1103 cut-off events. [2024-06-27 20:46:20,097 INFO L125 PetriNetUnfolderBase]: For 95805/95805 co-relation queries the response was YES. [2024-06-27 20:46:20,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8304 conditions, 1103 events. 640/1103 cut-off events. For 95805/95805 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5412 event pairs, 76 based on Foata normal form. 2/1103 useless extension candidates. Maximal degree in co-relation 8196. Up to 830 conditions per place. [2024-06-27 20:46:20,110 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 175 selfloop transitions, 62 changer transitions 0/239 dead transitions. [2024-06-27 20:46:20,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 239 transitions, 3327 flow [2024-06-27 20:46:20,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-27 20:46:20,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:46:20,112 INFO L175 Difference]: Start difference. First operand has 229 places, 221 transitions, 2493 flow. Second operand 10 states and 124 transitions. [2024-06-27 20:46:20,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 239 transitions, 3327 flow [2024-06-27 20:46:20,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 239 transitions, 3070 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-27 20:46:20,356 INFO L231 Difference]: Finished difference. Result has 229 places, 222 transitions, 2394 flow [2024-06-27 20:46:20,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2244, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2394, PETRI_PLACES=229, PETRI_TRANSITIONS=222} [2024-06-27 20:46:20,356 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 199 predicate places. [2024-06-27 20:46:20,357 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 222 transitions, 2394 flow [2024-06-27 20:46:20,357 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) [2024-06-27 20:46:20,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:20,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:20,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:46:20,357 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)] === [2024-06-27 20:46:20,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:20,358 INFO L85 PathProgramCache]: Analyzing trace with hash 827149990, now seen corresponding path program 1 times [2024-06-27 20:46:20,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:20,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364134797] [2024-06-27 20:46:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:20,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:21,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:21,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364134797] [2024-06-27 20:46:21,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364134797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:21,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:21,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:46:21,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915871118] [2024-06-27 20:46:21,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:21,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:46:21,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:21,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:46:21,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:46:21,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:21,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 222 transitions, 2394 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) [2024-06-27 20:46:21,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:21,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:21,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:22,375 INFO L124 PetriNetUnfolderBase]: 651/1124 cut-off events. [2024-06-27 20:46:22,376 INFO L125 PetriNetUnfolderBase]: For 103028/103028 co-relation queries the response was YES. [2024-06-27 20:46:22,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8348 conditions, 1124 events. 651/1124 cut-off events. For 103028/103028 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 5543 event pairs, 81 based on Foata normal form. 2/1124 useless extension candidates. Maximal degree in co-relation 8241. Up to 1011 conditions per place. [2024-06-27 20:46:22,385 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 231 selfloop transitions, 22 changer transitions 0/255 dead transitions. [2024-06-27 20:46:22,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 255 transitions, 3180 flow [2024-06-27 20:46:22,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:46:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:46:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-27 20:46:22,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-27 20:46:22,386 INFO L175 Difference]: Start difference. First operand has 229 places, 222 transitions, 2394 flow. Second operand 12 states and 140 transitions. [2024-06-27 20:46:22,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 255 transitions, 3180 flow [2024-06-27 20:46:22,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 255 transitions, 3052 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:22,624 INFO L231 Difference]: Finished difference. Result has 236 places, 228 transitions, 2395 flow [2024-06-27 20:46:22,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2395, PETRI_PLACES=236, PETRI_TRANSITIONS=228} [2024-06-27 20:46:22,625 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 206 predicate places. [2024-06-27 20:46:22,625 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 228 transitions, 2395 flow [2024-06-27 20:46:22,625 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) [2024-06-27 20:46:22,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:22,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:22,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:46:22,625 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)] === [2024-06-27 20:46:22,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:22,625 INFO L85 PathProgramCache]: Analyzing trace with hash 912140830, now seen corresponding path program 2 times [2024-06-27 20:46:22,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:22,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466251780] [2024-06-27 20:46:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:22,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:23,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:23,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466251780] [2024-06-27 20:46:23,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466251780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:23,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:23,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:46:23,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994100743] [2024-06-27 20:46:23,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:23,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:46:23,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:23,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:46:23,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:46:23,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:23,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 228 transitions, 2395 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) [2024-06-27 20:46:23,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:23,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:23,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:24,406 INFO L124 PetriNetUnfolderBase]: 672/1163 cut-off events. [2024-06-27 20:46:24,407 INFO L125 PetriNetUnfolderBase]: For 110629/110629 co-relation queries the response was YES. [2024-06-27 20:46:24,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8614 conditions, 1163 events. 672/1163 cut-off events. For 110629/110629 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5828 event pairs, 98 based on Foata normal form. 2/1163 useless extension candidates. Maximal degree in co-relation 8504. Up to 1076 conditions per place. [2024-06-27 20:46:24,416 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 234 selfloop transitions, 25 changer transitions 0/261 dead transitions. [2024-06-27 20:46:24,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 261 transitions, 3198 flow [2024-06-27 20:46:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:46:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:46:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-27 20:46:24,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-27 20:46:24,417 INFO L175 Difference]: Start difference. First operand has 236 places, 228 transitions, 2395 flow. Second operand 12 states and 141 transitions. [2024-06-27 20:46:24,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 261 transitions, 3198 flow [2024-06-27 20:46:24,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 261 transitions, 3143 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:24,703 INFO L231 Difference]: Finished difference. Result has 244 places, 234 transitions, 2464 flow [2024-06-27 20:46:24,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2348, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2464, PETRI_PLACES=244, PETRI_TRANSITIONS=234} [2024-06-27 20:46:24,704 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 214 predicate places. [2024-06-27 20:46:24,704 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 234 transitions, 2464 flow [2024-06-27 20:46:24,704 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) [2024-06-27 20:46:24,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:24,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:24,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:46:24,704 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)] === [2024-06-27 20:46:24,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:24,705 INFO L85 PathProgramCache]: Analyzing trace with hash -198731686, now seen corresponding path program 3 times [2024-06-27 20:46:24,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:24,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532341873] [2024-06-27 20:46:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:24,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:26,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:26,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532341873] [2024-06-27 20:46:26,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532341873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:26,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:26,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:46:26,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731810588] [2024-06-27 20:46:26,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:26,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:46:26,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:26,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:46:26,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:46:26,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:26,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 234 transitions, 2464 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) [2024-06-27 20:46:26,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:26,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:26,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:27,121 INFO L124 PetriNetUnfolderBase]: 669/1158 cut-off events. [2024-06-27 20:46:27,122 INFO L125 PetriNetUnfolderBase]: For 108532/108532 co-relation queries the response was YES. [2024-06-27 20:46:27,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8476 conditions, 1158 events. 669/1158 cut-off events. For 108532/108532 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5802 event pairs, 97 based on Foata normal form. 2/1158 useless extension candidates. Maximal degree in co-relation 8363. Up to 1088 conditions per place. [2024-06-27 20:46:27,135 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 233 selfloop transitions, 24 changer transitions 0/259 dead transitions. [2024-06-27 20:46:27,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 259 transitions, 3053 flow [2024-06-27 20:46:27,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:46:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:46:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-27 20:46:27,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-27 20:46:27,136 INFO L175 Difference]: Start difference. First operand has 244 places, 234 transitions, 2464 flow. Second operand 12 states and 138 transitions. [2024-06-27 20:46:27,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 259 transitions, 3053 flow [2024-06-27 20:46:27,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 259 transitions, 3013 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:27,409 INFO L231 Difference]: Finished difference. Result has 250 places, 235 transitions, 2490 flow [2024-06-27 20:46:27,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2490, PETRI_PLACES=250, PETRI_TRANSITIONS=235} [2024-06-27 20:46:27,410 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-27 20:46:27,410 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 235 transitions, 2490 flow [2024-06-27 20:46:27,410 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) [2024-06-27 20:46:27,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:27,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:27,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:46:27,410 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)] === [2024-06-27 20:46:27,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:27,411 INFO L85 PathProgramCache]: Analyzing trace with hash 56400179, now seen corresponding path program 1 times [2024-06-27 20:46:27,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:27,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308434708] [2024-06-27 20:46:27,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:27,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:28,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:28,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308434708] [2024-06-27 20:46:28,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308434708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:28,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:28,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:46:28,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951655058] [2024-06-27 20:46:28,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:28,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:46:28,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:28,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:46:28,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:46:29,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:29,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 235 transitions, 2490 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) [2024-06-27 20:46:29,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:29,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:29,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:29,719 INFO L124 PetriNetUnfolderBase]: 665/1152 cut-off events. [2024-06-27 20:46:29,719 INFO L125 PetriNetUnfolderBase]: For 105944/105944 co-relation queries the response was YES. [2024-06-27 20:46:29,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8365 conditions, 1152 events. 665/1152 cut-off events. For 105944/105944 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5784 event pairs, 94 based on Foata normal form. 2/1152 useless extension candidates. Maximal degree in co-relation 8249. Up to 1097 conditions per place. [2024-06-27 20:46:29,730 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 235 selfloop transitions, 19 changer transitions 0/256 dead transitions. [2024-06-27 20:46:29,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 256 transitions, 3054 flow [2024-06-27 20:46:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:46:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:46:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-27 20:46:29,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-27 20:46:29,731 INFO L175 Difference]: Start difference. First operand has 250 places, 235 transitions, 2490 flow. Second operand 11 states and 125 transitions. [2024-06-27 20:46:29,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 256 transitions, 3054 flow [2024-06-27 20:46:30,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 256 transitions, 2998 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 20:46:30,032 INFO L231 Difference]: Finished difference. Result has 252 places, 235 transitions, 2477 flow [2024-06-27 20:46:30,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2434, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2477, PETRI_PLACES=252, PETRI_TRANSITIONS=235} [2024-06-27 20:46:30,033 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 222 predicate places. [2024-06-27 20:46:30,033 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 235 transitions, 2477 flow [2024-06-27 20:46:30,033 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) [2024-06-27 20:46:30,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:30,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:30,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:46:30,034 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)] === [2024-06-27 20:46:30,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:30,034 INFO L85 PathProgramCache]: Analyzing trace with hash 56394444, now seen corresponding path program 4 times [2024-06-27 20:46:30,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:30,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378925740] [2024-06-27 20:46:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:30,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:31,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:31,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378925740] [2024-06-27 20:46:31,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378925740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:31,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:31,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:46:31,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943896778] [2024-06-27 20:46:31,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:31,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:46:31,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:31,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:46:31,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:46:31,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:31,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 235 transitions, 2477 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) [2024-06-27 20:46:31,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:31,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:31,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:32,066 INFO L124 PetriNetUnfolderBase]: 672/1165 cut-off events. [2024-06-27 20:46:32,066 INFO L125 PetriNetUnfolderBase]: For 108766/108766 co-relation queries the response was YES. [2024-06-27 20:46:32,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8451 conditions, 1165 events. 672/1165 cut-off events. For 108766/108766 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 5845 event pairs, 98 based on Foata normal form. 2/1165 useless extension candidates. Maximal degree in co-relation 8334. Up to 1115 conditions per place. [2024-06-27 20:46:32,076 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 238 selfloop transitions, 18 changer transitions 0/258 dead transitions. [2024-06-27 20:46:32,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 258 transitions, 3079 flow [2024-06-27 20:46:32,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:46:32,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:46:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-27 20:46:32,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-27 20:46:32,077 INFO L175 Difference]: Start difference. First operand has 252 places, 235 transitions, 2477 flow. Second operand 11 states and 123 transitions. [2024-06-27 20:46:32,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 258 transitions, 3079 flow [2024-06-27 20:46:32,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 258 transitions, 3032 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:46:32,388 INFO L231 Difference]: Finished difference. Result has 256 places, 238 transitions, 2515 flow [2024-06-27 20:46:32,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2515, PETRI_PLACES=256, PETRI_TRANSITIONS=238} [2024-06-27 20:46:32,389 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 226 predicate places. [2024-06-27 20:46:32,389 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 238 transitions, 2515 flow [2024-06-27 20:46:32,389 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) [2024-06-27 20:46:32,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:32,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:32,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:46:32,390 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)] === [2024-06-27 20:46:32,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:32,390 INFO L85 PathProgramCache]: Analyzing trace with hash 915715750, now seen corresponding path program 5 times [2024-06-27 20:46:32,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:32,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763988541] [2024-06-27 20:46:32,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:32,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:33,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:33,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763988541] [2024-06-27 20:46:33,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763988541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:33,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:33,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:46:33,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611896606] [2024-06-27 20:46:33,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:33,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:46:33,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:33,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:46:33,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:46:33,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:33,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 238 transitions, 2515 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) [2024-06-27 20:46:33,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:33,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:33,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:34,159 INFO L124 PetriNetUnfolderBase]: 676/1173 cut-off events. [2024-06-27 20:46:34,160 INFO L125 PetriNetUnfolderBase]: For 111674/111674 co-relation queries the response was YES. [2024-06-27 20:46:34,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8529 conditions, 1173 events. 676/1173 cut-off events. For 111674/111674 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 5897 event pairs, 94 based on Foata normal form. 2/1173 useless extension candidates. Maximal degree in co-relation 8410. Up to 1059 conditions per place. [2024-06-27 20:46:34,170 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 230 selfloop transitions, 28 changer transitions 0/260 dead transitions. [2024-06-27 20:46:34,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 260 transitions, 3251 flow [2024-06-27 20:46:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:34,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-27 20:46:34,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-27 20:46:34,171 INFO L175 Difference]: Start difference. First operand has 256 places, 238 transitions, 2515 flow. Second operand 10 states and 119 transitions. [2024-06-27 20:46:34,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 260 transitions, 3251 flow [2024-06-27 20:46:34,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 260 transitions, 3214 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:46:34,498 INFO L231 Difference]: Finished difference. Result has 258 places, 239 transitions, 2552 flow [2024-06-27 20:46:34,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2478, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2552, PETRI_PLACES=258, PETRI_TRANSITIONS=239} [2024-06-27 20:46:34,499 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 228 predicate places. [2024-06-27 20:46:34,499 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 239 transitions, 2552 flow [2024-06-27 20:46:34,499 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) [2024-06-27 20:46:34,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:34,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:34,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:46:34,499 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)] === [2024-06-27 20:46:34,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:34,499 INFO L85 PathProgramCache]: Analyzing trace with hash 915719470, now seen corresponding path program 6 times [2024-06-27 20:46:34,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:34,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235534891] [2024-06-27 20:46:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:34,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:35,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:35,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235534891] [2024-06-27 20:46:35,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235534891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:35,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:35,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:46:35,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991541873] [2024-06-27 20:46:35,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:35,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:46:35,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:35,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:46:35,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:46:35,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:35,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 239 transitions, 2552 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) [2024-06-27 20:46:35,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:35,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:35,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:36,409 INFO L124 PetriNetUnfolderBase]: 673/1168 cut-off events. [2024-06-27 20:46:36,409 INFO L125 PetriNetUnfolderBase]: For 108809/108809 co-relation queries the response was YES. [2024-06-27 20:46:36,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8424 conditions, 1168 events. 673/1168 cut-off events. For 108809/108809 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 5890 event pairs, 97 based on Foata normal form. 2/1168 useless extension candidates. Maximal degree in co-relation 8304. Up to 1085 conditions per place. [2024-06-27 20:46:36,425 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 229 selfloop transitions, 27 changer transitions 0/258 dead transitions. [2024-06-27 20:46:36,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 258 transitions, 3116 flow [2024-06-27 20:46:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:36,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-27 20:46:36,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-27 20:46:36,426 INFO L175 Difference]: Start difference. First operand has 258 places, 239 transitions, 2552 flow. Second operand 10 states and 117 transitions. [2024-06-27 20:46:36,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 258 transitions, 3116 flow [2024-06-27 20:46:36,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 258 transitions, 3048 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 20:46:36,726 INFO L231 Difference]: Finished difference. Result has 259 places, 239 transitions, 2546 flow [2024-06-27 20:46:36,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2484, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2546, PETRI_PLACES=259, PETRI_TRANSITIONS=239} [2024-06-27 20:46:36,726 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 229 predicate places. [2024-06-27 20:46:36,726 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 239 transitions, 2546 flow [2024-06-27 20:46:36,726 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) [2024-06-27 20:46:36,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:36,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:36,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:46:36,727 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)] === [2024-06-27 20:46:36,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:36,727 INFO L85 PathProgramCache]: Analyzing trace with hash 200500455, now seen corresponding path program 1 times [2024-06-27 20:46:36,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:36,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089760761] [2024-06-27 20:46:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:36,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:38,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:38,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089760761] [2024-06-27 20:46:38,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089760761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:38,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:38,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:46:38,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711004078] [2024-06-27 20:46:38,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:38,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:46:38,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:38,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:46:38,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:46:38,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:38,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 239 transitions, 2546 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) [2024-06-27 20:46:38,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:38,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:38,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:38,930 INFO L124 PetriNetUnfolderBase]: 677/1176 cut-off events. [2024-06-27 20:46:38,930 INFO L125 PetriNetUnfolderBase]: For 108922/108922 co-relation queries the response was YES. [2024-06-27 20:46:38,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8429 conditions, 1176 events. 677/1176 cut-off events. For 108922/108922 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 5965 event pairs, 75 based on Foata normal form. 2/1176 useless extension candidates. Maximal degree in co-relation 8309. Up to 1018 conditions per place. [2024-06-27 20:46:38,945 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 209 selfloop transitions, 48 changer transitions 0/259 dead transitions. [2024-06-27 20:46:38,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 259 transitions, 3114 flow [2024-06-27 20:46:38,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-27 20:46:38,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-27 20:46:38,946 INFO L175 Difference]: Start difference. First operand has 259 places, 239 transitions, 2546 flow. Second operand 10 states and 122 transitions. [2024-06-27 20:46:38,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 259 transitions, 3114 flow [2024-06-27 20:46:39,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 259 transitions, 3050 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 20:46:39,241 INFO L231 Difference]: Finished difference. Result has 259 places, 240 transitions, 2590 flow [2024-06-27 20:46:39,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2482, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2590, PETRI_PLACES=259, PETRI_TRANSITIONS=240} [2024-06-27 20:46:39,241 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 229 predicate places. [2024-06-27 20:46:39,241 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 240 transitions, 2590 flow [2024-06-27 20:46:39,241 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) [2024-06-27 20:46:39,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:39,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:39,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:46:39,242 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)] === [2024-06-27 20:46:39,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:39,242 INFO L85 PathProgramCache]: Analyzing trace with hash 200285129, now seen corresponding path program 2 times [2024-06-27 20:46:39,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:39,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481525370] [2024-06-27 20:46:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:39,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:41,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:41,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481525370] [2024-06-27 20:46:41,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481525370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:41,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:41,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:46:41,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895448692] [2024-06-27 20:46:41,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:41,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:46:41,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:41,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:46:41,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:46:41,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:41,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 240 transitions, 2590 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) [2024-06-27 20:46:41,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:41,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:41,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:42,042 INFO L124 PetriNetUnfolderBase]: 673/1170 cut-off events. [2024-06-27 20:46:42,042 INFO L125 PetriNetUnfolderBase]: For 100418/100418 co-relation queries the response was YES. [2024-06-27 20:46:42,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8282 conditions, 1170 events. 673/1170 cut-off events. For 100418/100418 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 5927 event pairs, 75 based on Foata normal form. 2/1170 useless extension candidates. Maximal degree in co-relation 8162. Up to 565 conditions per place. [2024-06-27 20:46:42,054 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 146 selfloop transitions, 117 changer transitions 0/265 dead transitions. [2024-06-27 20:46:42,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 265 transitions, 3632 flow [2024-06-27 20:46:42,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:46:42,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:46:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-27 20:46:42,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-06-27 20:46:42,055 INFO L175 Difference]: Start difference. First operand has 259 places, 240 transitions, 2590 flow. Second operand 11 states and 146 transitions. [2024-06-27 20:46:42,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 265 transitions, 3632 flow [2024-06-27 20:46:42,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 265 transitions, 3522 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 20:46:42,365 INFO L231 Difference]: Finished difference. Result has 262 places, 240 transitions, 2719 flow [2024-06-27 20:46:42,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2480, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2719, PETRI_PLACES=262, PETRI_TRANSITIONS=240} [2024-06-27 20:46:42,365 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 232 predicate places. [2024-06-27 20:46:42,366 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 240 transitions, 2719 flow [2024-06-27 20:46:42,366 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) [2024-06-27 20:46:42,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:42,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:42,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:46:42,366 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)] === [2024-06-27 20:46:42,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:42,367 INFO L85 PathProgramCache]: Analyzing trace with hash 667460891, now seen corresponding path program 3 times [2024-06-27 20:46:42,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:42,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113570305] [2024-06-27 20:46:42,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:42,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:43,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:43,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113570305] [2024-06-27 20:46:43,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113570305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:43,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:43,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:46:43,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043390030] [2024-06-27 20:46:43,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:43,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:46:43,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:43,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:46:43,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:46:43,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:43,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 240 transitions, 2719 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) [2024-06-27 20:46:43,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:43,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:43,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:44,069 INFO L124 PetriNetUnfolderBase]: 669/1164 cut-off events. [2024-06-27 20:46:44,070 INFO L125 PetriNetUnfolderBase]: For 98599/98599 co-relation queries the response was YES. [2024-06-27 20:46:44,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8302 conditions, 1164 events. 669/1164 cut-off events. For 98599/98599 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 5942 event pairs, 59 based on Foata normal form. 2/1164 useless extension candidates. Maximal degree in co-relation 8181. Up to 821 conditions per place. [2024-06-27 20:46:44,081 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 178 selfloop transitions, 86 changer transitions 0/266 dead transitions. [2024-06-27 20:46:44,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 266 transitions, 3342 flow [2024-06-27 20:46:44,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:46:44,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:46:44,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-27 20:46:44,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41055718475073316 [2024-06-27 20:46:44,082 INFO L175 Difference]: Start difference. First operand has 262 places, 240 transitions, 2719 flow. Second operand 11 states and 140 transitions. [2024-06-27 20:46:44,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 266 transitions, 3342 flow [2024-06-27 20:46:44,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 266 transitions, 3030 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-27 20:46:44,335 INFO L231 Difference]: Finished difference. Result has 262 places, 241 transitions, 2600 flow [2024-06-27 20:46:44,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2600, PETRI_PLACES=262, PETRI_TRANSITIONS=241} [2024-06-27 20:46:44,336 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 232 predicate places. [2024-06-27 20:46:44,336 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 241 transitions, 2600 flow [2024-06-27 20:46:44,336 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) [2024-06-27 20:46:44,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:44,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:44,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:46:44,337 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)] === [2024-06-27 20:46:44,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:44,337 INFO L85 PathProgramCache]: Analyzing trace with hash 200492519, now seen corresponding path program 4 times [2024-06-27 20:46:44,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:44,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164908847] [2024-06-27 20:46:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:44,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:45,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:45,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164908847] [2024-06-27 20:46:45,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164908847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:45,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:45,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:46:45,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312318984] [2024-06-27 20:46:45,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:45,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:46:45,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:45,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:46:45,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:46:45,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:45,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 241 transitions, 2600 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) [2024-06-27 20:46:45,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:45,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:45,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:46,368 INFO L124 PetriNetUnfolderBase]: 675/1174 cut-off events. [2024-06-27 20:46:46,368 INFO L125 PetriNetUnfolderBase]: For 100392/100392 co-relation queries the response was YES. [2024-06-27 20:46:46,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8234 conditions, 1174 events. 675/1174 cut-off events. For 100392/100392 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6002 event pairs, 59 based on Foata normal form. 2/1174 useless extension candidates. Maximal degree in co-relation 8112. Up to 831 conditions per place. [2024-06-27 20:46:46,379 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 176 selfloop transitions, 89 changer transitions 0/267 dead transitions. [2024-06-27 20:46:46,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 267 transitions, 3234 flow [2024-06-27 20:46:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:46:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:46:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-27 20:46:46,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-27 20:46:46,380 INFO L175 Difference]: Start difference. First operand has 262 places, 241 transitions, 2600 flow. Second operand 11 states and 137 transitions. [2024-06-27 20:46:46,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 267 transitions, 3234 flow [2024-06-27 20:46:46,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 267 transitions, 3047 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 20:46:46,640 INFO L231 Difference]: Finished difference. Result has 264 places, 243 transitions, 2622 flow [2024-06-27 20:46:46,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2622, PETRI_PLACES=264, PETRI_TRANSITIONS=243} [2024-06-27 20:46:46,641 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 234 predicate places. [2024-06-27 20:46:46,641 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 243 transitions, 2622 flow [2024-06-27 20:46:46,641 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) [2024-06-27 20:46:46,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:46,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:46,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:46:46,641 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)] === [2024-06-27 20:46:46,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:46,641 INFO L85 PathProgramCache]: Analyzing trace with hash 200290709, now seen corresponding path program 5 times [2024-06-27 20:46:46,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:46,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830302274] [2024-06-27 20:46:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:46,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:48,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:48,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830302274] [2024-06-27 20:46:48,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830302274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:48,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:48,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:46:48,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528880501] [2024-06-27 20:46:48,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:48,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:46:48,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:48,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:46:48,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:46:48,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:48,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 243 transitions, 2622 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) [2024-06-27 20:46:48,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:48,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:48,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:48,865 INFO L124 PetriNetUnfolderBase]: 671/1168 cut-off events. [2024-06-27 20:46:48,865 INFO L125 PetriNetUnfolderBase]: For 95829/95829 co-relation queries the response was YES. [2024-06-27 20:46:48,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8082 conditions, 1168 events. 671/1168 cut-off events. For 95829/95829 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 5922 event pairs, 74 based on Foata normal form. 2/1168 useless extension candidates. Maximal degree in co-relation 7960. Up to 565 conditions per place. [2024-06-27 20:46:48,877 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 146 selfloop transitions, 118 changer transitions 0/266 dead transitions. [2024-06-27 20:46:48,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 266 transitions, 3364 flow [2024-06-27 20:46:48,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:46:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:46:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-27 20:46:48,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252199413489736 [2024-06-27 20:46:48,878 INFO L175 Difference]: Start difference. First operand has 264 places, 243 transitions, 2622 flow. Second operand 11 states and 145 transitions. [2024-06-27 20:46:48,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 266 transitions, 3364 flow [2024-06-27 20:46:49,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 266 transitions, 3171 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:46:49,143 INFO L231 Difference]: Finished difference. Result has 267 places, 243 transitions, 2670 flow [2024-06-27 20:46:49,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2670, PETRI_PLACES=267, PETRI_TRANSITIONS=243} [2024-06-27 20:46:49,143 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 237 predicate places. [2024-06-27 20:46:49,144 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 243 transitions, 2670 flow [2024-06-27 20:46:49,144 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) [2024-06-27 20:46:49,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:49,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:49,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:46:49,144 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)] === [2024-06-27 20:46:49,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:49,144 INFO L85 PathProgramCache]: Analyzing trace with hash 200284974, now seen corresponding path program 7 times [2024-06-27 20:46:49,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:49,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326494218] [2024-06-27 20:46:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:49,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:50,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:50,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326494218] [2024-06-27 20:46:50,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326494218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:50,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:50,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:50,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754538811] [2024-06-27 20:46:50,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:50,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:50,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:50,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:50,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:50,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:50,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 243 transitions, 2670 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) [2024-06-27 20:46:50,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:50,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:50,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:50,614 INFO L124 PetriNetUnfolderBase]: 675/1176 cut-off events. [2024-06-27 20:46:50,614 INFO L125 PetriNetUnfolderBase]: For 98618/98618 co-relation queries the response was YES. [2024-06-27 20:46:50,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8199 conditions, 1176 events. 675/1176 cut-off events. For 98618/98618 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 5979 event pairs, 80 based on Foata normal form. 2/1176 useless extension candidates. Maximal degree in co-relation 8076. Up to 889 conditions per place. [2024-06-27 20:46:50,626 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 178 selfloop transitions, 82 changer transitions 0/262 dead transitions. [2024-06-27 20:46:50,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 262 transitions, 3248 flow [2024-06-27 20:46:50,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-27 20:46:50,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-27 20:46:50,627 INFO L175 Difference]: Start difference. First operand has 267 places, 243 transitions, 2670 flow. Second operand 10 states and 128 transitions. [2024-06-27 20:46:50,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 262 transitions, 3248 flow [2024-06-27 20:46:50,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 262 transitions, 3009 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 20:46:50,911 INFO L231 Difference]: Finished difference. Result has 268 places, 244 transitions, 2613 flow [2024-06-27 20:46:50,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2613, PETRI_PLACES=268, PETRI_TRANSITIONS=244} [2024-06-27 20:46:50,912 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-06-27 20:46:50,912 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 244 transitions, 2613 flow [2024-06-27 20:46:50,912 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) [2024-06-27 20:46:50,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:50,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:50,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:46:50,912 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)] === [2024-06-27 20:46:50,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:50,913 INFO L85 PathProgramCache]: Analyzing trace with hash 194778444, now seen corresponding path program 8 times [2024-06-27 20:46:50,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:50,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616044164] [2024-06-27 20:46:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:50,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:51,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:51,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616044164] [2024-06-27 20:46:51,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616044164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:51,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:51,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:51,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624578709] [2024-06-27 20:46:51,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:51,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:51,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:51,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:51,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:52,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:52,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 244 transitions, 2613 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) [2024-06-27 20:46:52,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:52,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:52,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:52,415 INFO L124 PetriNetUnfolderBase]: 679/1184 cut-off events. [2024-06-27 20:46:52,415 INFO L125 PetriNetUnfolderBase]: For 100521/100521 co-relation queries the response was YES. [2024-06-27 20:46:52,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8150 conditions, 1184 events. 679/1184 cut-off events. For 100521/100521 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 6045 event pairs, 82 based on Foata normal form. 2/1184 useless extension candidates. Maximal degree in co-relation 8026. Up to 897 conditions per place. [2024-06-27 20:46:52,427 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 182 selfloop transitions, 79 changer transitions 0/263 dead transitions. [2024-06-27 20:46:52,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 263 transitions, 3195 flow [2024-06-27 20:46:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-27 20:46:52,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-27 20:46:52,428 INFO L175 Difference]: Start difference. First operand has 268 places, 244 transitions, 2613 flow. Second operand 10 states and 129 transitions. [2024-06-27 20:46:52,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 263 transitions, 3195 flow [2024-06-27 20:46:52,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 263 transitions, 3023 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:46:52,728 INFO L231 Difference]: Finished difference. Result has 270 places, 245 transitions, 2619 flow [2024-06-27 20:46:52,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2441, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2619, PETRI_PLACES=270, PETRI_TRANSITIONS=245} [2024-06-27 20:46:52,728 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2024-06-27 20:46:52,729 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 245 transitions, 2619 flow [2024-06-27 20:46:52,729 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) [2024-06-27 20:46:52,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:52,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:52,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:46:52,729 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)] === [2024-06-27 20:46:52,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:52,730 INFO L85 PathProgramCache]: Analyzing trace with hash 667307286, now seen corresponding path program 9 times [2024-06-27 20:46:52,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:52,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929802935] [2024-06-27 20:46:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:52,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:53,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:53,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929802935] [2024-06-27 20:46:53,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929802935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:53,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:53,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:53,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683958559] [2024-06-27 20:46:53,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:53,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:53,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:53,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:53,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:53,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:53,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 245 transitions, 2619 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) [2024-06-27 20:46:53,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:53,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:53,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:54,352 INFO L124 PetriNetUnfolderBase]: 683/1192 cut-off events. [2024-06-27 20:46:54,352 INFO L125 PetriNetUnfolderBase]: For 103201/103201 co-relation queries the response was YES. [2024-06-27 20:46:54,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8209 conditions, 1192 events. 683/1192 cut-off events. For 103201/103201 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 6106 event pairs, 78 based on Foata normal form. 2/1192 useless extension candidates. Maximal degree in co-relation 8084. Up to 885 conditions per place. [2024-06-27 20:46:54,364 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 183 selfloop transitions, 80 changer transitions 0/265 dead transitions. [2024-06-27 20:46:54,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 265 transitions, 3209 flow [2024-06-27 20:46:54,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:54,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-27 20:46:54,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-27 20:46:54,366 INFO L175 Difference]: Start difference. First operand has 270 places, 245 transitions, 2619 flow. Second operand 10 states and 129 transitions. [2024-06-27 20:46:54,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 265 transitions, 3209 flow [2024-06-27 20:46:54,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 265 transitions, 3041 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 20:46:54,662 INFO L231 Difference]: Finished difference. Result has 272 places, 246 transitions, 2633 flow [2024-06-27 20:46:54,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2633, PETRI_PLACES=272, PETRI_TRANSITIONS=246} [2024-06-27 20:46:54,663 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 242 predicate places. [2024-06-27 20:46:54,663 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 246 transitions, 2633 flow [2024-06-27 20:46:54,663 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) [2024-06-27 20:46:54,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:54,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:54,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:46:54,663 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)] === [2024-06-27 20:46:54,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:54,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1234285723, now seen corresponding path program 2 times [2024-06-27 20:46:54,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:54,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177187566] [2024-06-27 20:46:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:54,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:56,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:56,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177187566] [2024-06-27 20:46:56,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177187566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:56,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:56,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:46:56,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234207027] [2024-06-27 20:46:56,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:56,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:46:56,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:56,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:46:56,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:46:56,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:56,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 246 transitions, 2633 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) [2024-06-27 20:46:56,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:56,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:56,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:56,590 INFO L124 PetriNetUnfolderBase]: 687/1200 cut-off events. [2024-06-27 20:46:56,590 INFO L125 PetriNetUnfolderBase]: For 105728/105728 co-relation queries the response was YES. [2024-06-27 20:46:56,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8262 conditions, 1200 events. 687/1200 cut-off events. For 105728/105728 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 6183 event pairs, 90 based on Foata normal form. 2/1200 useless extension candidates. Maximal degree in co-relation 8136. Up to 1121 conditions per place. [2024-06-27 20:46:56,601 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 235 selfloop transitions, 27 changer transitions 0/264 dead transitions. [2024-06-27 20:46:56,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 264 transitions, 3205 flow [2024-06-27 20:46:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-27 20:46:56,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-27 20:46:56,602 INFO L175 Difference]: Start difference. First operand has 272 places, 246 transitions, 2633 flow. Second operand 10 states and 119 transitions. [2024-06-27 20:46:56,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 264 transitions, 3205 flow [2024-06-27 20:46:56,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 264 transitions, 3033 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 20:46:56,907 INFO L231 Difference]: Finished difference. Result has 274 places, 247 transitions, 2529 flow [2024-06-27 20:46:56,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2529, PETRI_PLACES=274, PETRI_TRANSITIONS=247} [2024-06-27 20:46:56,907 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 244 predicate places. [2024-06-27 20:46:56,907 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 247 transitions, 2529 flow [2024-06-27 20:46:56,907 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) [2024-06-27 20:46:56,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:56,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:56,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:46:56,907 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)] === [2024-06-27 20:46:56,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:56,908 INFO L85 PathProgramCache]: Analyzing trace with hash 12586967, now seen corresponding path program 3 times [2024-06-27 20:46:56,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:56,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196712150] [2024-06-27 20:46:56,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:56,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:58,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:58,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196712150] [2024-06-27 20:46:58,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196712150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:58,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:58,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:46:58,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821914104] [2024-06-27 20:46:58,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:58,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:46:58,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:58,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:46:58,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:46:58,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:46:58,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 247 transitions, 2529 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) [2024-06-27 20:46:58,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:58,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:46:58,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:58,890 INFO L124 PetriNetUnfolderBase]: 691/1208 cut-off events. [2024-06-27 20:46:58,890 INFO L125 PetriNetUnfolderBase]: For 107842/107842 co-relation queries the response was YES. [2024-06-27 20:46:58,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8182 conditions, 1208 events. 691/1208 cut-off events. For 107842/107842 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6234 event pairs, 88 based on Foata normal form. 2/1208 useless extension candidates. Maximal degree in co-relation 8055. Up to 1117 conditions per place. [2024-06-27 20:46:58,901 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 232 selfloop transitions, 31 changer transitions 0/265 dead transitions. [2024-06-27 20:46:58,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 265 transitions, 3105 flow [2024-06-27 20:46:58,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:46:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:46:58,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-27 20:46:58,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-27 20:46:58,902 INFO L175 Difference]: Start difference. First operand has 274 places, 247 transitions, 2529 flow. Second operand 10 states and 121 transitions. [2024-06-27 20:46:58,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 265 transitions, 3105 flow [2024-06-27 20:46:59,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 265 transitions, 3047 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:46:59,224 INFO L231 Difference]: Finished difference. Result has 276 places, 248 transitions, 2549 flow [2024-06-27 20:46:59,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2549, PETRI_PLACES=276, PETRI_TRANSITIONS=248} [2024-06-27 20:46:59,224 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 246 predicate places. [2024-06-27 20:46:59,224 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 248 transitions, 2549 flow [2024-06-27 20:46:59,225 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) [2024-06-27 20:46:59,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:59,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:59,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:46:59,225 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)] === [2024-06-27 20:46:59,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1732914158, now seen corresponding path program 10 times [2024-06-27 20:46:59,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:59,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761740403] [2024-06-27 20:46:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:59,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:00,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:00,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761740403] [2024-06-27 20:47:00,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761740403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:00,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:00,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:00,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856340523] [2024-06-27 20:47:00,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:00,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:00,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:00,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:00,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:00,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:00,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 248 transitions, 2549 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) [2024-06-27 20:47:00,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:00,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:00,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:00,969 INFO L124 PetriNetUnfolderBase]: 715/1260 cut-off events. [2024-06-27 20:47:00,970 INFO L125 PetriNetUnfolderBase]: For 153485/153485 co-relation queries the response was YES. [2024-06-27 20:47:00,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8429 conditions, 1260 events. 715/1260 cut-off events. For 153485/153485 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 6576 event pairs, 94 based on Foata normal form. 14/1272 useless extension candidates. Maximal degree in co-relation 8301. Up to 1113 conditions per place. [2024-06-27 20:47:00,981 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 234 selfloop transitions, 27 changer transitions 8/271 dead transitions. [2024-06-27 20:47:00,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 271 transitions, 3191 flow [2024-06-27 20:47:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-27 20:47:00,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-27 20:47:00,982 INFO L175 Difference]: Start difference. First operand has 276 places, 248 transitions, 2549 flow. Second operand 10 states and 126 transitions. [2024-06-27 20:47:00,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 271 transitions, 3191 flow [2024-06-27 20:47:01,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 271 transitions, 3123 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:01,290 INFO L231 Difference]: Finished difference. Result has 278 places, 247 transitions, 2529 flow [2024-06-27 20:47:01,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2529, PETRI_PLACES=278, PETRI_TRANSITIONS=247} [2024-06-27 20:47:01,291 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 248 predicate places. [2024-06-27 20:47:01,291 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 247 transitions, 2529 flow [2024-06-27 20:47:01,291 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) [2024-06-27 20:47:01,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:01,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:01,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:47:01,291 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)] === [2024-06-27 20:47:01,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:01,292 INFO L85 PathProgramCache]: Analyzing trace with hash 7014841, now seen corresponding path program 6 times [2024-06-27 20:47:01,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:01,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666813988] [2024-06-27 20:47:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:01,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:02,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:02,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666813988] [2024-06-27 20:47:02,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666813988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:02,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:02,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:02,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643729783] [2024-06-27 20:47:02,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:02,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:02,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:02,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:02,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:02,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:02,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 247 transitions, 2529 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) [2024-06-27 20:47:02,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:02,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:02,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:03,366 INFO L124 PetriNetUnfolderBase]: 709/1250 cut-off events. [2024-06-27 20:47:03,366 INFO L125 PetriNetUnfolderBase]: For 113480/113480 co-relation queries the response was YES. [2024-06-27 20:47:03,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8410 conditions, 1250 events. 709/1250 cut-off events. For 113480/113480 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6546 event pairs, 90 based on Foata normal form. 2/1250 useless extension candidates. Maximal degree in co-relation 8281. Up to 1103 conditions per place. [2024-06-27 20:47:03,377 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 221 selfloop transitions, 46 changer transitions 0/269 dead transitions. [2024-06-27 20:47:03,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 269 transitions, 3161 flow [2024-06-27 20:47:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:03,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:03,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-27 20:47:03,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-27 20:47:03,378 INFO L175 Difference]: Start difference. First operand has 278 places, 247 transitions, 2529 flow. Second operand 11 states and 134 transitions. [2024-06-27 20:47:03,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 269 transitions, 3161 flow [2024-06-27 20:47:03,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 269 transitions, 3093 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:03,695 INFO L231 Difference]: Finished difference. Result has 281 places, 249 transitions, 2606 flow [2024-06-27 20:47:03,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2463, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2606, PETRI_PLACES=281, PETRI_TRANSITIONS=249} [2024-06-27 20:47:03,695 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2024-06-27 20:47:03,696 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 249 transitions, 2606 flow [2024-06-27 20:47:03,696 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) [2024-06-27 20:47:03,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:03,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:03,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:47:03,696 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)] === [2024-06-27 20:47:03,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:03,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1531304965, now seen corresponding path program 7 times [2024-06-27 20:47:03,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:03,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705783984] [2024-06-27 20:47:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:03,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:04,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:04,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705783984] [2024-06-27 20:47:04,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705783984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:04,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:04,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:04,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479873570] [2024-06-27 20:47:04,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:04,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:04,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:04,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:04,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:05,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:05,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 249 transitions, 2606 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) [2024-06-27 20:47:05,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:05,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:05,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:05,656 INFO L124 PetriNetUnfolderBase]: 715/1260 cut-off events. [2024-06-27 20:47:05,656 INFO L125 PetriNetUnfolderBase]: For 116400/116400 co-relation queries the response was YES. [2024-06-27 20:47:05,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8562 conditions, 1260 events. 715/1260 cut-off events. For 116400/116400 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 6627 event pairs, 92 based on Foata normal form. 2/1260 useless extension candidates. Maximal degree in co-relation 8432. Up to 1113 conditions per place. [2024-06-27 20:47:05,668 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 224 selfloop transitions, 45 changer transitions 0/271 dead transitions. [2024-06-27 20:47:05,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 271 transitions, 3244 flow [2024-06-27 20:47:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:05,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:05,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-27 20:47:05,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-27 20:47:05,669 INFO L175 Difference]: Start difference. First operand has 281 places, 249 transitions, 2606 flow. Second operand 11 states and 135 transitions. [2024-06-27 20:47:05,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 271 transitions, 3244 flow [2024-06-27 20:47:06,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 271 transitions, 3121 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 20:47:06,045 INFO L231 Difference]: Finished difference. Result has 283 places, 251 transitions, 2628 flow [2024-06-27 20:47:06,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2483, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2628, PETRI_PLACES=283, PETRI_TRANSITIONS=251} [2024-06-27 20:47:06,045 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 253 predicate places. [2024-06-27 20:47:06,046 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 251 transitions, 2628 flow [2024-06-27 20:47:06,046 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) [2024-06-27 20:47:06,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:06,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:06,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:47:06,046 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)] === [2024-06-27 20:47:06,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1234277787, now seen corresponding path program 8 times [2024-06-27 20:47:06,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:06,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996262561] [2024-06-27 20:47:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:06,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:08,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:08,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996262561] [2024-06-27 20:47:08,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996262561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:08,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:08,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:08,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167744675] [2024-06-27 20:47:08,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:08,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:08,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:08,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:08,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:08,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:08,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 251 transitions, 2628 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) [2024-06-27 20:47:08,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:08,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:08,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:08,983 INFO L124 PetriNetUnfolderBase]: 721/1270 cut-off events. [2024-06-27 20:47:08,983 INFO L125 PetriNetUnfolderBase]: For 118748/118748 co-relation queries the response was YES. [2024-06-27 20:47:08,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8612 conditions, 1270 events. 721/1270 cut-off events. For 118748/118748 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 6680 event pairs, 93 based on Foata normal form. 2/1270 useless extension candidates. Maximal degree in co-relation 8481. Up to 1136 conditions per place. [2024-06-27 20:47:08,997 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 234 selfloop transitions, 37 changer transitions 0/273 dead transitions. [2024-06-27 20:47:08,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 273 transitions, 3424 flow [2024-06-27 20:47:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-27 20:47:08,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-27 20:47:08,998 INFO L175 Difference]: Start difference. First operand has 283 places, 251 transitions, 2628 flow. Second operand 11 states and 135 transitions. [2024-06-27 20:47:08,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 273 transitions, 3424 flow [2024-06-27 20:47:09,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 273 transitions, 3299 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-27 20:47:09,346 INFO L231 Difference]: Finished difference. Result has 285 places, 253 transitions, 2614 flow [2024-06-27 20:47:09,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2503, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2614, PETRI_PLACES=285, PETRI_TRANSITIONS=253} [2024-06-27 20:47:09,347 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 255 predicate places. [2024-06-27 20:47:09,347 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 253 transitions, 2614 flow [2024-06-27 20:47:09,347 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) [2024-06-27 20:47:09,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:09,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:09,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:47:09,347 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)] === [2024-06-27 20:47:09,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:09,347 INFO L85 PathProgramCache]: Analyzing trace with hash 7009261, now seen corresponding path program 9 times [2024-06-27 20:47:09,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:09,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109937883] [2024-06-27 20:47:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:09,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:10,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:10,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109937883] [2024-06-27 20:47:10,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109937883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:10,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:10,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:10,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789143247] [2024-06-27 20:47:10,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:10,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:10,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:10,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:10,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:10,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:10,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 253 transitions, 2614 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) [2024-06-27 20:47:10,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:10,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:10,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:11,338 INFO L124 PetriNetUnfolderBase]: 730/1285 cut-off events. [2024-06-27 20:47:11,338 INFO L125 PetriNetUnfolderBase]: For 121825/121825 co-relation queries the response was YES. [2024-06-27 20:47:11,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8696 conditions, 1285 events. 730/1285 cut-off events. For 121825/121825 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 6808 event pairs, 90 based on Foata normal form. 2/1285 useless extension candidates. Maximal degree in co-relation 8564. Up to 1129 conditions per place. [2024-06-27 20:47:11,350 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 227 selfloop transitions, 49 changer transitions 0/278 dead transitions. [2024-06-27 20:47:11,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 278 transitions, 3290 flow [2024-06-27 20:47:11,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-27 20:47:11,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-27 20:47:11,351 INFO L175 Difference]: Start difference. First operand has 285 places, 253 transitions, 2614 flow. Second operand 11 states and 137 transitions. [2024-06-27 20:47:11,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 278 transitions, 3290 flow [2024-06-27 20:47:11,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 278 transitions, 3209 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:11,708 INFO L231 Difference]: Finished difference. Result has 289 places, 257 transitions, 2717 flow [2024-06-27 20:47:11,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2717, PETRI_PLACES=289, PETRI_TRANSITIONS=257} [2024-06-27 20:47:11,708 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 259 predicate places. [2024-06-27 20:47:11,708 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 257 transitions, 2717 flow [2024-06-27 20:47:11,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:11,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:11,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:11,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:47:11,709 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)] === [2024-06-27 20:47:11,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:11,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1725042565, now seen corresponding path program 10 times [2024-06-27 20:47:11,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:11,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304131211] [2024-06-27 20:47:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:11,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:13,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:13,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304131211] [2024-06-27 20:47:13,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304131211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:13,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:13,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:13,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622238097] [2024-06-27 20:47:13,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:13,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:13,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:13,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:13,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:13,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:13,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 257 transitions, 2717 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) [2024-06-27 20:47:13,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:13,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:13,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:13,811 INFO L124 PetriNetUnfolderBase]: 726/1279 cut-off events. [2024-06-27 20:47:13,811 INFO L125 PetriNetUnfolderBase]: For 116127/116127 co-relation queries the response was YES. [2024-06-27 20:47:13,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8561 conditions, 1279 events. 726/1279 cut-off events. For 116127/116127 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 6760 event pairs, 97 based on Foata normal form. 2/1279 useless extension candidates. Maximal degree in co-relation 8427. Up to 1173 conditions per place. [2024-06-27 20:47:13,825 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 242 selfloop transitions, 33 changer transitions 0/277 dead transitions. [2024-06-27 20:47:13,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 277 transitions, 3322 flow [2024-06-27 20:47:13,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:13,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-27 20:47:13,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-27 20:47:13,826 INFO L175 Difference]: Start difference. First operand has 289 places, 257 transitions, 2717 flow. Second operand 11 states and 131 transitions. [2024-06-27 20:47:13,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 277 transitions, 3322 flow [2024-06-27 20:47:14,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 277 transitions, 3177 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:14,198 INFO L231 Difference]: Finished difference. Result has 293 places, 258 transitions, 2662 flow [2024-06-27 20:47:14,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2662, PETRI_PLACES=293, PETRI_TRANSITIONS=258} [2024-06-27 20:47:14,199 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 263 predicate places. [2024-06-27 20:47:14,199 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 258 transitions, 2662 flow [2024-06-27 20:47:14,199 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) [2024-06-27 20:47:14,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:14,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:14,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:47:14,199 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)] === [2024-06-27 20:47:14,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:14,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1732661621, now seen corresponding path program 4 times [2024-06-27 20:47:14,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:14,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047645536] [2024-06-27 20:47:14,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:14,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:15,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:15,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047645536] [2024-06-27 20:47:15,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047645536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:15,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:15,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:15,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690042384] [2024-06-27 20:47:15,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:15,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:15,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:15,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:15,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:15,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:15,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 258 transitions, 2662 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) [2024-06-27 20:47:15,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:15,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:15,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:16,038 INFO L124 PetriNetUnfolderBase]: 730/1287 cut-off events. [2024-06-27 20:47:16,039 INFO L125 PetriNetUnfolderBase]: For 118169/118169 co-relation queries the response was YES. [2024-06-27 20:47:16,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8533 conditions, 1287 events. 730/1287 cut-off events. For 118169/118169 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 6797 event pairs, 107 based on Foata normal form. 2/1287 useless extension candidates. Maximal degree in co-relation 8397. Up to 1217 conditions per place. [2024-06-27 20:47:16,050 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 249 selfloop transitions, 24 changer transitions 1/276 dead transitions. [2024-06-27 20:47:16,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 276 transitions, 3273 flow [2024-06-27 20:47:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:16,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-27 20:47:16,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-27 20:47:16,051 INFO L175 Difference]: Start difference. First operand has 293 places, 258 transitions, 2662 flow. Second operand 10 states and 116 transitions. [2024-06-27 20:47:16,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 276 transitions, 3273 flow [2024-06-27 20:47:16,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 276 transitions, 3159 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 20:47:16,392 INFO L231 Difference]: Finished difference. Result has 293 places, 259 transitions, 2621 flow [2024-06-27 20:47:16,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2551, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2621, PETRI_PLACES=293, PETRI_TRANSITIONS=259} [2024-06-27 20:47:16,392 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 263 predicate places. [2024-06-27 20:47:16,392 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 259 transitions, 2621 flow [2024-06-27 20:47:16,392 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) [2024-06-27 20:47:16,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:16,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:16,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:47:16,392 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)] === [2024-06-27 20:47:16,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:16,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1732670921, now seen corresponding path program 5 times [2024-06-27 20:47:16,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:16,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755912449] [2024-06-27 20:47:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:16,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:17,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:17,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755912449] [2024-06-27 20:47:17,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755912449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:17,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:17,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:17,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429264270] [2024-06-27 20:47:17,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:17,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:17,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:17,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:17,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:17,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:17,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 259 transitions, 2621 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) [2024-06-27 20:47:17,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:17,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:17,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:18,162 INFO L124 PetriNetUnfolderBase]: 710/1247 cut-off events. [2024-06-27 20:47:18,162 INFO L125 PetriNetUnfolderBase]: For 120627/120627 co-relation queries the response was YES. [2024-06-27 20:47:18,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8353 conditions, 1247 events. 710/1247 cut-off events. For 120627/120627 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 6546 event pairs, 93 based on Foata normal form. 2/1247 useless extension candidates. Maximal degree in co-relation 8215. Up to 1177 conditions per place. [2024-06-27 20:47:18,175 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 250 selfloop transitions, 24 changer transitions 0/276 dead transitions. [2024-06-27 20:47:18,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 276 transitions, 3221 flow [2024-06-27 20:47:18,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:18,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-27 20:47:18,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-27 20:47:18,176 INFO L175 Difference]: Start difference. First operand has 293 places, 259 transitions, 2621 flow. Second operand 10 states and 115 transitions. [2024-06-27 20:47:18,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 276 transitions, 3221 flow [2024-06-27 20:47:18,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 276 transitions, 3165 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:18,570 INFO L231 Difference]: Finished difference. Result has 296 places, 260 transitions, 2633 flow [2024-06-27 20:47:18,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2633, PETRI_PLACES=296, PETRI_TRANSITIONS=260} [2024-06-27 20:47:18,570 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-06-27 20:47:18,570 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 260 transitions, 2633 flow [2024-06-27 20:47:18,570 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) [2024-06-27 20:47:18,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:18,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:18,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:47:18,571 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)] === [2024-06-27 20:47:18,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:18,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1034768452, now seen corresponding path program 11 times [2024-06-27 20:47:18,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:18,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614785869] [2024-06-27 20:47:18,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:18,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:19,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:19,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614785869] [2024-06-27 20:47:19,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614785869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:19,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:19,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:19,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115574315] [2024-06-27 20:47:19,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:19,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:19,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:19,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:19,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:19,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 260 transitions, 2633 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) [2024-06-27 20:47:19,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:19,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:19,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:20,470 INFO L124 PetriNetUnfolderBase]: 714/1255 cut-off events. [2024-06-27 20:47:20,470 INFO L125 PetriNetUnfolderBase]: For 123288/123288 co-relation queries the response was YES. [2024-06-27 20:47:20,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8426 conditions, 1255 events. 714/1255 cut-off events. For 123288/123288 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 6589 event pairs, 97 based on Foata normal form. 2/1255 useless extension candidates. Maximal degree in co-relation 8287. Up to 1161 conditions per place. [2024-06-27 20:47:20,490 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 239 selfloop transitions, 37 changer transitions 0/278 dead transitions. [2024-06-27 20:47:20,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 278 transitions, 3245 flow [2024-06-27 20:47:20,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-27 20:47:20,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-27 20:47:20,492 INFO L175 Difference]: Start difference. First operand has 296 places, 260 transitions, 2633 flow. Second operand 11 states and 130 transitions. [2024-06-27 20:47:20,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 278 transitions, 3245 flow [2024-06-27 20:47:20,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 278 transitions, 3187 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:20,948 INFO L231 Difference]: Finished difference. Result has 299 places, 261 transitions, 2675 flow [2024-06-27 20:47:20,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2575, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2675, PETRI_PLACES=299, PETRI_TRANSITIONS=261} [2024-06-27 20:47:20,948 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 269 predicate places. [2024-06-27 20:47:20,948 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 261 transitions, 2675 flow [2024-06-27 20:47:20,948 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) [2024-06-27 20:47:20,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:20,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:20,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:47:20,949 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)] === [2024-06-27 20:47:20,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:20,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1034620582, now seen corresponding path program 12 times [2024-06-27 20:47:20,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:20,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642442450] [2024-06-27 20:47:20,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:20,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:21,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:21,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642442450] [2024-06-27 20:47:21,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642442450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:21,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:21,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:21,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329914328] [2024-06-27 20:47:21,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:21,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:21,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:21,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:21,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:22,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:22,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 261 transitions, 2675 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) [2024-06-27 20:47:22,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:22,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:22,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:22,443 INFO L124 PetriNetUnfolderBase]: 725/1276 cut-off events. [2024-06-27 20:47:22,443 INFO L125 PetriNetUnfolderBase]: For 135047/135047 co-relation queries the response was YES. [2024-06-27 20:47:22,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8797 conditions, 1276 events. 725/1276 cut-off events. For 135047/135047 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 6756 event pairs, 98 based on Foata normal form. 2/1276 useless extension candidates. Maximal degree in co-relation 8657. Up to 1139 conditions per place. [2024-06-27 20:47:22,457 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 236 selfloop transitions, 43 changer transitions 0/281 dead transitions. [2024-06-27 20:47:22,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 281 transitions, 3507 flow [2024-06-27 20:47:22,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-27 20:47:22,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:47:22,458 INFO L175 Difference]: Start difference. First operand has 299 places, 261 transitions, 2675 flow. Second operand 10 states and 124 transitions. [2024-06-27 20:47:22,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 281 transitions, 3507 flow [2024-06-27 20:47:23,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 281 transitions, 3423 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:23,102 INFO L231 Difference]: Finished difference. Result has 301 places, 263 transitions, 2727 flow [2024-06-27 20:47:23,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2591, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2727, PETRI_PLACES=301, PETRI_TRANSITIONS=263} [2024-06-27 20:47:23,103 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 271 predicate places. [2024-06-27 20:47:23,103 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 263 transitions, 2727 flow [2024-06-27 20:47:23,103 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) [2024-06-27 20:47:23,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:23,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:23,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:47:23,103 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)] === [2024-06-27 20:47:23,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:23,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1040136567, now seen corresponding path program 11 times [2024-06-27 20:47:23,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:23,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105210727] [2024-06-27 20:47:23,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:23,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:24,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:24,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105210727] [2024-06-27 20:47:24,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105210727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:24,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:24,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:24,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188506] [2024-06-27 20:47:24,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:24,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:24,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:24,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:24,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:24,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:24,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 263 transitions, 2727 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) [2024-06-27 20:47:24,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:24,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:24,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:25,386 INFO L124 PetriNetUnfolderBase]: 731/1286 cut-off events. [2024-06-27 20:47:25,386 INFO L125 PetriNetUnfolderBase]: For 138395/138395 co-relation queries the response was YES. [2024-06-27 20:47:25,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8918 conditions, 1286 events. 731/1286 cut-off events. For 138395/138395 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 6838 event pairs, 88 based on Foata normal form. 2/1286 useless extension candidates. Maximal degree in co-relation 8777. Up to 1147 conditions per place. [2024-06-27 20:47:25,399 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 239 selfloop transitions, 44 changer transitions 0/285 dead transitions. [2024-06-27 20:47:25,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 285 transitions, 3393 flow [2024-06-27 20:47:25,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:25,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:25,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-27 20:47:25,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-27 20:47:25,400 INFO L175 Difference]: Start difference. First operand has 301 places, 263 transitions, 2727 flow. Second operand 11 states and 137 transitions. [2024-06-27 20:47:25,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 285 transitions, 3393 flow [2024-06-27 20:47:25,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 285 transitions, 3317 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:25,851 INFO L231 Difference]: Finished difference. Result has 306 places, 265 transitions, 2802 flow [2024-06-27 20:47:25,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2651, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2802, PETRI_PLACES=306, PETRI_TRANSITIONS=265} [2024-06-27 20:47:25,851 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 276 predicate places. [2024-06-27 20:47:25,851 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 265 transitions, 2802 flow [2024-06-27 20:47:25,851 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) [2024-06-27 20:47:25,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:25,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:25,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:47:25,852 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)] === [2024-06-27 20:47:25,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:25,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1034624457, now seen corresponding path program 12 times [2024-06-27 20:47:25,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:25,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600704448] [2024-06-27 20:47:25,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:25,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:27,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:27,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600704448] [2024-06-27 20:47:27,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600704448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:27,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:27,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:27,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849499412] [2024-06-27 20:47:27,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:27,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:27,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:27,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:27,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:27,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:27,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 265 transitions, 2802 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) [2024-06-27 20:47:27,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:27,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:27,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:27,778 INFO L124 PetriNetUnfolderBase]: 737/1296 cut-off events. [2024-06-27 20:47:27,778 INFO L125 PetriNetUnfolderBase]: For 141615/141615 co-relation queries the response was YES. [2024-06-27 20:47:27,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9086 conditions, 1296 events. 737/1296 cut-off events. For 141615/141615 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 6881 event pairs, 72 based on Foata normal form. 2/1296 useless extension candidates. Maximal degree in co-relation 8943. Up to 1069 conditions per place. [2024-06-27 20:47:27,792 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 216 selfloop transitions, 70 changer transitions 0/288 dead transitions. [2024-06-27 20:47:27,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 288 transitions, 3672 flow [2024-06-27 20:47:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-27 20:47:27,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-27 20:47:27,793 INFO L175 Difference]: Start difference. First operand has 306 places, 265 transitions, 2802 flow. Second operand 11 states and 139 transitions. [2024-06-27 20:47:27,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 288 transitions, 3672 flow [2024-06-27 20:47:28,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 288 transitions, 3541 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 20:47:28,278 INFO L231 Difference]: Finished difference. Result has 308 places, 267 transitions, 2874 flow [2024-06-27 20:47:28,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2874, PETRI_PLACES=308, PETRI_TRANSITIONS=267} [2024-06-27 20:47:28,279 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 278 predicate places. [2024-06-27 20:47:28,279 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 267 transitions, 2874 flow [2024-06-27 20:47:28,279 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) [2024-06-27 20:47:28,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:28,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:28,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:47:28,280 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)] === [2024-06-27 20:47:28,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:28,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1533468218, now seen corresponding path program 13 times [2024-06-27 20:47:28,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:28,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796014848] [2024-06-27 20:47:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:28,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:29,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:29,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796014848] [2024-06-27 20:47:29,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796014848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:29,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:29,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:29,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905616858] [2024-06-27 20:47:29,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:29,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:29,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:29,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:29,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:29,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:29,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 267 transitions, 2874 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) [2024-06-27 20:47:29,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:29,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:29,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:30,064 INFO L124 PetriNetUnfolderBase]: 741/1304 cut-off events. [2024-06-27 20:47:30,065 INFO L125 PetriNetUnfolderBase]: For 144471/144471 co-relation queries the response was YES. [2024-06-27 20:47:30,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9184 conditions, 1304 events. 741/1304 cut-off events. For 144471/144471 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 6944 event pairs, 100 based on Foata normal form. 2/1304 useless extension candidates. Maximal degree in co-relation 9040. Up to 1192 conditions per place. [2024-06-27 20:47:30,079 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 238 selfloop transitions, 46 changer transitions 0/286 dead transitions. [2024-06-27 20:47:30,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 286 transitions, 3502 flow [2024-06-27 20:47:30,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:47:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:47:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-27 20:47:30,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-27 20:47:30,080 INFO L175 Difference]: Start difference. First operand has 308 places, 267 transitions, 2874 flow. Second operand 12 states and 140 transitions. [2024-06-27 20:47:30,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 286 transitions, 3502 flow [2024-06-27 20:47:30,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 286 transitions, 3171 flow, removed 36 selfloop flow, removed 13 redundant places. [2024-06-27 20:47:30,560 INFO L231 Difference]: Finished difference. Result has 307 places, 268 transitions, 2661 flow [2024-06-27 20:47:30,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2661, PETRI_PLACES=307, PETRI_TRANSITIONS=268} [2024-06-27 20:47:30,561 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 277 predicate places. [2024-06-27 20:47:30,561 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 268 transitions, 2661 flow [2024-06-27 20:47:30,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:30,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:30,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:30,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:47:30,562 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)] === [2024-06-27 20:47:30,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:30,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1538974748, now seen corresponding path program 14 times [2024-06-27 20:47:30,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:30,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464389225] [2024-06-27 20:47:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:30,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:31,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:31,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464389225] [2024-06-27 20:47:31,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464389225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:31,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:31,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:31,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736240653] [2024-06-27 20:47:31,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:31,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:31,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:31,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:31,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:32,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:32,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 268 transitions, 2661 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) [2024-06-27 20:47:32,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:32,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:32,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:32,475 INFO L124 PetriNetUnfolderBase]: 738/1299 cut-off events. [2024-06-27 20:47:32,475 INFO L125 PetriNetUnfolderBase]: For 136349/136349 co-relation queries the response was YES. [2024-06-27 20:47:32,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8640 conditions, 1299 events. 738/1299 cut-off events. For 136349/136349 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 6924 event pairs, 99 based on Foata normal form. 2/1299 useless extension candidates. Maximal degree in co-relation 8499. Up to 1205 conditions per place. [2024-06-27 20:47:32,488 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 247 selfloop transitions, 36 changer transitions 0/285 dead transitions. [2024-06-27 20:47:32,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 285 transitions, 3267 flow [2024-06-27 20:47:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:32,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-27 20:47:32,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-27 20:47:32,492 INFO L175 Difference]: Start difference. First operand has 307 places, 268 transitions, 2661 flow. Second operand 11 states and 131 transitions. [2024-06-27 20:47:32,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 285 transitions, 3267 flow [2024-06-27 20:47:32,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 285 transitions, 3149 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-27 20:47:32,929 INFO L231 Difference]: Finished difference. Result has 307 places, 268 transitions, 2619 flow [2024-06-27 20:47:32,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2619, PETRI_PLACES=307, PETRI_TRANSITIONS=268} [2024-06-27 20:47:32,929 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 277 predicate places. [2024-06-27 20:47:32,930 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 268 transitions, 2619 flow [2024-06-27 20:47:32,930 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) [2024-06-27 20:47:32,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:32,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:32,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:47:32,930 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)] === [2024-06-27 20:47:32,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:32,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1531097575, now seen corresponding path program 13 times [2024-06-27 20:47:32,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:32,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339506984] [2024-06-27 20:47:32,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:32,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:34,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:34,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339506984] [2024-06-27 20:47:34,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339506984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:34,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:34,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:34,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705716851] [2024-06-27 20:47:34,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:34,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:34,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:34,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:34,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:34,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:34,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 268 transitions, 2619 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) [2024-06-27 20:47:34,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:34,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:34,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:34,606 INFO L124 PetriNetUnfolderBase]: 734/1293 cut-off events. [2024-06-27 20:47:34,606 INFO L125 PetriNetUnfolderBase]: For 129026/129026 co-relation queries the response was YES. [2024-06-27 20:47:34,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8349 conditions, 1293 events. 734/1293 cut-off events. For 129026/129026 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 6889 event pairs, 92 based on Foata normal form. 2/1293 useless extension candidates. Maximal degree in co-relation 8209. Up to 1083 conditions per place. [2024-06-27 20:47:34,616 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 225 selfloop transitions, 59 changer transitions 0/286 dead transitions. [2024-06-27 20:47:34,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 286 transitions, 3229 flow [2024-06-27 20:47:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-27 20:47:34,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-27 20:47:34,617 INFO L175 Difference]: Start difference. First operand has 307 places, 268 transitions, 2619 flow. Second operand 10 states and 131 transitions. [2024-06-27 20:47:34,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 286 transitions, 3229 flow [2024-06-27 20:47:35,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 286 transitions, 3130 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 20:47:35,055 INFO L231 Difference]: Finished difference. Result has 307 places, 268 transitions, 2646 flow [2024-06-27 20:47:35,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2520, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2646, PETRI_PLACES=307, PETRI_TRANSITIONS=268} [2024-06-27 20:47:35,056 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 277 predicate places. [2024-06-27 20:47:35,056 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 268 transitions, 2646 flow [2024-06-27 20:47:35,056 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) [2024-06-27 20:47:35,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:35,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:35,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:47:35,056 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)] === [2024-06-27 20:47:35,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:35,056 INFO L85 PathProgramCache]: Analyzing trace with hash 802769929, now seen corresponding path program 6 times [2024-06-27 20:47:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:35,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856283432] [2024-06-27 20:47:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:35,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:36,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:36,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856283432] [2024-06-27 20:47:36,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856283432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:36,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:36,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:36,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663909542] [2024-06-27 20:47:36,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:36,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:36,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:36,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:36,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:36,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:36,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 268 transitions, 2646 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) [2024-06-27 20:47:36,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:36,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:36,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:36,836 INFO L124 PetriNetUnfolderBase]: 738/1301 cut-off events. [2024-06-27 20:47:36,836 INFO L125 PetriNetUnfolderBase]: For 131617/131617 co-relation queries the response was YES. [2024-06-27 20:47:36,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8458 conditions, 1301 events. 738/1301 cut-off events. For 131617/131617 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 6972 event pairs, 96 based on Foata normal form. 2/1301 useless extension candidates. Maximal degree in co-relation 8317. Up to 1252 conditions per place. [2024-06-27 20:47:36,849 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 261 selfloop transitions, 20 changer transitions 0/283 dead transitions. [2024-06-27 20:47:36,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 283 transitions, 3261 flow [2024-06-27 20:47:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:36,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-27 20:47:36,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-27 20:47:36,850 INFO L175 Difference]: Start difference. First operand has 307 places, 268 transitions, 2646 flow. Second operand 10 states and 111 transitions. [2024-06-27 20:47:36,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 283 transitions, 3261 flow [2024-06-27 20:47:37,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 283 transitions, 3097 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-27 20:47:37,295 INFO L231 Difference]: Finished difference. Result has 308 places, 270 transitions, 2558 flow [2024-06-27 20:47:37,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2482, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2558, PETRI_PLACES=308, PETRI_TRANSITIONS=270} [2024-06-27 20:47:37,296 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 278 predicate places. [2024-06-27 20:47:37,296 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 270 transitions, 2558 flow [2024-06-27 20:47:37,296 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) [2024-06-27 20:47:37,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:37,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:37,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:47:37,296 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)] === [2024-06-27 20:47:37,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:37,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1140917093, now seen corresponding path program 7 times [2024-06-27 20:47:37,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:37,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477578069] [2024-06-27 20:47:37,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:37,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:38,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:38,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477578069] [2024-06-27 20:47:38,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477578069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:38,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:38,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:38,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515644478] [2024-06-27 20:47:38,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:38,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:38,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:38,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:38,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:38,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:38,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 270 transitions, 2558 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) [2024-06-27 20:47:38,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:38,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:38,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:39,308 INFO L124 PetriNetUnfolderBase]: 745/1314 cut-off events. [2024-06-27 20:47:39,308 INFO L125 PetriNetUnfolderBase]: For 131519/131519 co-relation queries the response was YES. [2024-06-27 20:47:39,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8346 conditions, 1314 events. 745/1314 cut-off events. For 131519/131519 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 7049 event pairs, 90 based on Foata normal form. 2/1314 useless extension candidates. Maximal degree in co-relation 8205. Up to 1247 conditions per place. [2024-06-27 20:47:39,321 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 261 selfloop transitions, 26 changer transitions 0/289 dead transitions. [2024-06-27 20:47:39,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 289 transitions, 3198 flow [2024-06-27 20:47:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-27 20:47:39,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-27 20:47:39,322 INFO L175 Difference]: Start difference. First operand has 308 places, 270 transitions, 2558 flow. Second operand 10 states and 115 transitions. [2024-06-27 20:47:39,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 289 transitions, 3198 flow [2024-06-27 20:47:39,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 289 transitions, 3149 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:39,742 INFO L231 Difference]: Finished difference. Result has 313 places, 275 transitions, 2626 flow [2024-06-27 20:47:39,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2626, PETRI_PLACES=313, PETRI_TRANSITIONS=275} [2024-06-27 20:47:39,742 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2024-06-27 20:47:39,742 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 275 transitions, 2626 flow [2024-06-27 20:47:39,743 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) [2024-06-27 20:47:39,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:39,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:39,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:47:39,743 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)] === [2024-06-27 20:47:39,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:39,743 INFO L85 PathProgramCache]: Analyzing trace with hash 798248363, now seen corresponding path program 8 times [2024-06-27 20:47:39,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:39,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181315074] [2024-06-27 20:47:39,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:39,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:40,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:40,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181315074] [2024-06-27 20:47:40,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181315074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:40,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:40,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:40,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635639086] [2024-06-27 20:47:40,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:40,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:40,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:40,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:40,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:40,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:40,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 275 transitions, 2626 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) [2024-06-27 20:47:40,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:40,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:40,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:41,350 INFO L124 PetriNetUnfolderBase]: 749/1322 cut-off events. [2024-06-27 20:47:41,350 INFO L125 PetriNetUnfolderBase]: For 134380/134380 co-relation queries the response was YES. [2024-06-27 20:47:41,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8591 conditions, 1322 events. 749/1322 cut-off events. For 134380/134380 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 7099 event pairs, 94 based on Foata normal form. 2/1322 useless extension candidates. Maximal degree in co-relation 8447. Up to 1277 conditions per place. [2024-06-27 20:47:41,365 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 267 selfloop transitions, 19 changer transitions 0/288 dead transitions. [2024-06-27 20:47:41,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 288 transitions, 3248 flow [2024-06-27 20:47:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:41,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:41,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-27 20:47:41,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-27 20:47:41,366 INFO L175 Difference]: Start difference. First operand has 313 places, 275 transitions, 2626 flow. Second operand 10 states and 108 transitions. [2024-06-27 20:47:41,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 288 transitions, 3248 flow [2024-06-27 20:47:41,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 288 transitions, 3197 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:41,783 INFO L231 Difference]: Finished difference. Result has 317 places, 276 transitions, 2639 flow [2024-06-27 20:47:41,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2575, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2639, PETRI_PLACES=317, PETRI_TRANSITIONS=276} [2024-06-27 20:47:41,783 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 287 predicate places. [2024-06-27 20:47:41,783 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 276 transitions, 2639 flow [2024-06-27 20:47:41,783 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) [2024-06-27 20:47:41,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:41,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:41,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:47:41,784 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)] === [2024-06-27 20:47:41,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:41,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1334856503, now seen corresponding path program 9 times [2024-06-27 20:47:41,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:41,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531371963] [2024-06-27 20:47:41,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:41,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:43,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:43,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531371963] [2024-06-27 20:47:43,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531371963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:43,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:43,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:43,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104077950] [2024-06-27 20:47:43,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:43,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:43,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:43,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:43,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:43,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:43,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 276 transitions, 2639 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) [2024-06-27 20:47:43,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:43,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:43,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:43,916 INFO L124 PetriNetUnfolderBase]: 756/1335 cut-off events. [2024-06-27 20:47:43,916 INFO L125 PetriNetUnfolderBase]: For 137021/137021 co-relation queries the response was YES. [2024-06-27 20:47:43,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8660 conditions, 1335 events. 756/1335 cut-off events. For 137021/137021 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 7241 event pairs, 84 based on Foata normal form. 2/1335 useless extension candidates. Maximal degree in co-relation 8515. Up to 1231 conditions per place. [2024-06-27 20:47:43,930 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 254 selfloop transitions, 36 changer transitions 0/292 dead transitions. [2024-06-27 20:47:43,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 292 transitions, 3290 flow [2024-06-27 20:47:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-27 20:47:43,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-27 20:47:43,931 INFO L175 Difference]: Start difference. First operand has 317 places, 276 transitions, 2639 flow. Second operand 10 states and 114 transitions. [2024-06-27 20:47:43,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 292 transitions, 3290 flow [2024-06-27 20:47:44,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 292 transitions, 3233 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:44,330 INFO L231 Difference]: Finished difference. Result has 320 places, 279 transitions, 2720 flow [2024-06-27 20:47:44,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2720, PETRI_PLACES=320, PETRI_TRANSITIONS=279} [2024-06-27 20:47:44,331 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 290 predicate places. [2024-06-27 20:47:44,331 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 279 transitions, 2720 flow [2024-06-27 20:47:44,331 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) [2024-06-27 20:47:44,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:44,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:44,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:47:44,331 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)] === [2024-06-27 20:47:44,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:44,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1335071984, now seen corresponding path program 15 times [2024-06-27 20:47:44,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:44,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977471890] [2024-06-27 20:47:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:44,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:45,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:45,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977471890] [2024-06-27 20:47:45,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977471890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:45,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:45,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:45,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416992928] [2024-06-27 20:47:45,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:45,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:45,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:45,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:45,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:45,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:45,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 279 transitions, 2720 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) [2024-06-27 20:47:45,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:45,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:45,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:46,079 INFO L124 PetriNetUnfolderBase]: 760/1343 cut-off events. [2024-06-27 20:47:46,079 INFO L125 PetriNetUnfolderBase]: For 139997/139997 co-relation queries the response was YES. [2024-06-27 20:47:46,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8812 conditions, 1343 events. 760/1343 cut-off events. For 139997/139997 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 7266 event pairs, 90 based on Foata normal form. 2/1343 useless extension candidates. Maximal degree in co-relation 8665. Up to 1240 conditions per place. [2024-06-27 20:47:46,093 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 257 selfloop transitions, 37 changer transitions 0/296 dead transitions. [2024-06-27 20:47:46,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 296 transitions, 3407 flow [2024-06-27 20:47:46,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:46,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-27 20:47:46,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-27 20:47:46,095 INFO L175 Difference]: Start difference. First operand has 320 places, 279 transitions, 2720 flow. Second operand 11 states and 123 transitions. [2024-06-27 20:47:46,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 296 transitions, 3407 flow [2024-06-27 20:47:46,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 296 transitions, 3336 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:46,560 INFO L231 Difference]: Finished difference. Result has 325 places, 283 transitions, 2804 flow [2024-06-27 20:47:46,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2649, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2804, PETRI_PLACES=325, PETRI_TRANSITIONS=283} [2024-06-27 20:47:46,561 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 295 predicate places. [2024-06-27 20:47:46,561 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 283 transitions, 2804 flow [2024-06-27 20:47:46,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:46,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:46,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:46,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:47:46,561 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)] === [2024-06-27 20:47:46,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:46,561 INFO L85 PathProgramCache]: Analyzing trace with hash 798517133, now seen corresponding path program 10 times [2024-06-27 20:47:46,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:46,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993070294] [2024-06-27 20:47:46,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:46,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:47,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:47,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993070294] [2024-06-27 20:47:47,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993070294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:47,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:47,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:47,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353897630] [2024-06-27 20:47:47,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:47,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:47,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:47,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:47,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:47,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:47,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 283 transitions, 2804 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) [2024-06-27 20:47:47,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:47,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:47,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:48,425 INFO L124 PetriNetUnfolderBase]: 764/1351 cut-off events. [2024-06-27 20:47:48,425 INFO L125 PetriNetUnfolderBase]: For 142517/142517 co-relation queries the response was YES. [2024-06-27 20:47:48,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8892 conditions, 1351 events. 764/1351 cut-off events. For 142517/142517 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 7347 event pairs, 98 based on Foata normal form. 2/1351 useless extension candidates. Maximal degree in co-relation 8743. Up to 1306 conditions per place. [2024-06-27 20:47:48,437 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 276 selfloop transitions, 18 changer transitions 0/296 dead transitions. [2024-06-27 20:47:48,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 296 transitions, 3444 flow [2024-06-27 20:47:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-27 20:47:48,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-27 20:47:48,438 INFO L175 Difference]: Start difference. First operand has 325 places, 283 transitions, 2804 flow. Second operand 10 states and 107 transitions. [2024-06-27 20:47:48,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 296 transitions, 3444 flow [2024-06-27 20:47:48,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 296 transitions, 3257 flow, removed 29 selfloop flow, removed 12 redundant places. [2024-06-27 20:47:48,912 INFO L231 Difference]: Finished difference. Result has 323 places, 284 transitions, 2683 flow [2024-06-27 20:47:48,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2617, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2683, PETRI_PLACES=323, PETRI_TRANSITIONS=284} [2024-06-27 20:47:48,913 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 293 predicate places. [2024-06-27 20:47:48,913 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 284 transitions, 2683 flow [2024-06-27 20:47:48,913 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) [2024-06-27 20:47:48,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:48,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:48,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:47:48,913 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)] === [2024-06-27 20:47:48,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:48,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1877804195, now seen corresponding path program 14 times [2024-06-27 20:47:48,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:48,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966216904] [2024-06-27 20:47:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:48,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:50,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:50,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966216904] [2024-06-27 20:47:50,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966216904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:50,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:50,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:50,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993552495] [2024-06-27 20:47:50,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:50,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:50,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:50,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:50,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:50,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:50,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 284 transitions, 2683 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) [2024-06-27 20:47:50,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:50,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:50,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:50,993 INFO L124 PetriNetUnfolderBase]: 770/1361 cut-off events. [2024-06-27 20:47:50,993 INFO L125 PetriNetUnfolderBase]: For 145470/145470 co-relation queries the response was YES. [2024-06-27 20:47:51,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8698 conditions, 1361 events. 770/1361 cut-off events. For 145470/145470 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 7433 event pairs, 78 based on Foata normal form. 2/1361 useless extension candidates. Maximal degree in co-relation 8553. Up to 1193 conditions per place. [2024-06-27 20:47:51,005 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 252 selfloop transitions, 48 changer transitions 0/302 dead transitions. [2024-06-27 20:47:51,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 302 transitions, 3357 flow [2024-06-27 20:47:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:51,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-27 20:47:51,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-27 20:47:51,006 INFO L175 Difference]: Start difference. First operand has 323 places, 284 transitions, 2683 flow. Second operand 11 states and 129 transitions. [2024-06-27 20:47:51,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 302 transitions, 3357 flow [2024-06-27 20:47:51,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 302 transitions, 3301 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:51,448 INFO L231 Difference]: Finished difference. Result has 326 places, 286 transitions, 2760 flow [2024-06-27 20:47:51,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2627, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2760, PETRI_PLACES=326, PETRI_TRANSITIONS=286} [2024-06-27 20:47:51,448 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 296 predicate places. [2024-06-27 20:47:51,449 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 286 transitions, 2760 flow [2024-06-27 20:47:51,449 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) [2024-06-27 20:47:51,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:51,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:51,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:47:51,449 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)] === [2024-06-27 20:47:51,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:51,449 INFO L85 PathProgramCache]: Analyzing trace with hash 619038709, now seen corresponding path program 11 times [2024-06-27 20:47:51,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:51,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038498810] [2024-06-27 20:47:51,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:51,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:52,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:52,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038498810] [2024-06-27 20:47:52,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038498810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:52,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:52,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814361481] [2024-06-27 20:47:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:52,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:52,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:52,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:52,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:52,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:52,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 286 transitions, 2760 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) [2024-06-27 20:47:52,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:52,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:52,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:53,123 INFO L124 PetriNetUnfolderBase]: 774/1369 cut-off events. [2024-06-27 20:47:53,123 INFO L125 PetriNetUnfolderBase]: For 147791/147791 co-relation queries the response was YES. [2024-06-27 20:47:53,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8846 conditions, 1369 events. 774/1369 cut-off events. For 147791/147791 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 7445 event pairs, 102 based on Foata normal form. 2/1369 useless extension candidates. Maximal degree in co-relation 8700. Up to 1327 conditions per place. [2024-06-27 20:47:53,137 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 281 selfloop transitions, 16 changer transitions 0/299 dead transitions. [2024-06-27 20:47:53,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 299 transitions, 3406 flow [2024-06-27 20:47:53,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:53,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-27 20:47:53,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284457478005865 [2024-06-27 20:47:53,138 INFO L175 Difference]: Start difference. First operand has 326 places, 286 transitions, 2760 flow. Second operand 11 states and 112 transitions. [2024-06-27 20:47:53,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 299 transitions, 3406 flow [2024-06-27 20:47:53,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 299 transitions, 3251 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:53,680 INFO L231 Difference]: Finished difference. Result has 329 places, 287 transitions, 2669 flow [2024-06-27 20:47:53,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2605, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2669, PETRI_PLACES=329, PETRI_TRANSITIONS=287} [2024-06-27 20:47:53,680 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 299 predicate places. [2024-06-27 20:47:53,680 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 287 transitions, 2669 flow [2024-06-27 20:47:53,680 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) [2024-06-27 20:47:53,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:53,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:53,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:47:53,681 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)] === [2024-06-27 20:47:53,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:53,681 INFO L85 PathProgramCache]: Analyzing trace with hash 277568151, now seen corresponding path program 15 times [2024-06-27 20:47:53,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:53,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849288448] [2024-06-27 20:47:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:53,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:55,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:55,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849288448] [2024-06-27 20:47:55,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849288448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:55,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:55,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:55,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418096067] [2024-06-27 20:47:55,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:55,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:55,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:55,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:55,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:55,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:55,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 287 transitions, 2669 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) [2024-06-27 20:47:55,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:55,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:55,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:56,366 INFO L124 PetriNetUnfolderBase]: 770/1363 cut-off events. [2024-06-27 20:47:56,366 INFO L125 PetriNetUnfolderBase]: For 139093/139093 co-relation queries the response was YES. [2024-06-27 20:47:56,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8503 conditions, 1363 events. 770/1363 cut-off events. For 139093/139093 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 7425 event pairs, 84 based on Foata normal form. 2/1363 useless extension candidates. Maximal degree in co-relation 8356. Up to 1089 conditions per place. [2024-06-27 20:47:56,381 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 237 selfloop transitions, 66 changer transitions 0/305 dead transitions. [2024-06-27 20:47:56,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 305 transitions, 3753 flow [2024-06-27 20:47:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:56,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-27 20:47:56,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-27 20:47:56,382 INFO L175 Difference]: Start difference. First operand has 329 places, 287 transitions, 2669 flow. Second operand 11 states and 134 transitions. [2024-06-27 20:47:56,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 305 transitions, 3753 flow [2024-06-27 20:47:56,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 305 transitions, 3687 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 20:47:56,815 INFO L231 Difference]: Finished difference. Result has 331 places, 287 transitions, 2740 flow [2024-06-27 20:47:56,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2603, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2740, PETRI_PLACES=331, PETRI_TRANSITIONS=287} [2024-06-27 20:47:56,815 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 301 predicate places. [2024-06-27 20:47:56,815 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 287 transitions, 2740 flow [2024-06-27 20:47:56,815 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) [2024-06-27 20:47:56,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:56,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:56,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:47:56,816 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)] === [2024-06-27 20:47:56,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:56,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1818586763, now seen corresponding path program 12 times [2024-06-27 20:47:56,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:56,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678899689] [2024-06-27 20:47:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:56,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:58,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:58,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678899689] [2024-06-27 20:47:58,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678899689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:58,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:58,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:47:58,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452635208] [2024-06-27 20:47:58,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:58,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:47:58,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:58,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:47:58,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:47:58,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:47:58,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 287 transitions, 2740 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) [2024-06-27 20:47:58,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:58,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:47:58,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:58,733 INFO L124 PetriNetUnfolderBase]: 774/1371 cut-off events. [2024-06-27 20:47:58,733 INFO L125 PetriNetUnfolderBase]: For 141969/141969 co-relation queries the response was YES. [2024-06-27 20:47:58,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8680 conditions, 1371 events. 774/1371 cut-off events. For 141969/141969 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 7510 event pairs, 99 based on Foata normal form. 2/1371 useless extension candidates. Maximal degree in co-relation 8532. Up to 1334 conditions per place. [2024-06-27 20:47:58,746 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 283 selfloop transitions, 16 changer transitions 0/301 dead transitions. [2024-06-27 20:47:58,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 301 transitions, 3409 flow [2024-06-27 20:47:58,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:58,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:58,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-27 20:47:58,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-27 20:47:58,747 INFO L175 Difference]: Start difference. First operand has 331 places, 287 transitions, 2740 flow. Second operand 10 states and 107 transitions. [2024-06-27 20:47:58,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 301 transitions, 3409 flow [2024-06-27 20:47:59,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 301 transitions, 3240 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 20:47:59,295 INFO L231 Difference]: Finished difference. Result has 331 places, 289 transitions, 2655 flow [2024-06-27 20:47:59,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2571, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2655, PETRI_PLACES=331, PETRI_TRANSITIONS=289} [2024-06-27 20:47:59,295 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 301 predicate places. [2024-06-27 20:47:59,296 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 289 transitions, 2655 flow [2024-06-27 20:47:59,296 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) [2024-06-27 20:47:59,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:59,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:59,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:47:59,296 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)] === [2024-06-27 20:47:59,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:59,296 INFO L85 PathProgramCache]: Analyzing trace with hash 550355755, now seen corresponding path program 13 times [2024-06-27 20:47:59,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:59,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244205856] [2024-06-27 20:47:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:59,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:00,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:00,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244205856] [2024-06-27 20:48:00,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244205856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:00,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:00,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:00,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200780675] [2024-06-27 20:48:00,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:00,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:00,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:00,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:00,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:00,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:00,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 289 transitions, 2655 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) [2024-06-27 20:48:00,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:00,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:00,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:01,101 INFO L124 PetriNetUnfolderBase]: 778/1379 cut-off events. [2024-06-27 20:48:01,101 INFO L125 PetriNetUnfolderBase]: For 144452/144452 co-relation queries the response was YES. [2024-06-27 20:48:01,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8615 conditions, 1379 events. 778/1379 cut-off events. For 144452/144452 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 7561 event pairs, 103 based on Foata normal form. 2/1379 useless extension candidates. Maximal degree in co-relation 8465. Up to 1342 conditions per place. [2024-06-27 20:48:01,116 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 285 selfloop transitions, 15 changer transitions 0/302 dead transitions. [2024-06-27 20:48:01,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 302 transitions, 3313 flow [2024-06-27 20:48:01,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:01,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-27 20:48:01,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-27 20:48:01,117 INFO L175 Difference]: Start difference. First operand has 331 places, 289 transitions, 2655 flow. Second operand 10 states and 106 transitions. [2024-06-27 20:48:01,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 302 transitions, 3313 flow [2024-06-27 20:48:01,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 302 transitions, 3260 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 20:48:01,587 INFO L231 Difference]: Finished difference. Result has 334 places, 290 transitions, 2668 flow [2024-06-27 20:48:01,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2602, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2668, PETRI_PLACES=334, PETRI_TRANSITIONS=290} [2024-06-27 20:48:01,587 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 304 predicate places. [2024-06-27 20:48:01,588 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 290 transitions, 2668 flow [2024-06-27 20:48:01,588 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) [2024-06-27 20:48:01,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:01,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:01,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:48:01,588 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)] === [2024-06-27 20:48:01,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:01,588 INFO L85 PathProgramCache]: Analyzing trace with hash 585451844, now seen corresponding path program 16 times [2024-06-27 20:48:01,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:01,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753869169] [2024-06-27 20:48:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:01,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:02,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:02,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753869169] [2024-06-27 20:48:02,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753869169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:02,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:02,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:02,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946607883] [2024-06-27 20:48:02,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:02,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:02,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:02,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:02,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:02,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:02,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 290 transitions, 2668 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) [2024-06-27 20:48:02,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:02,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:02,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:03,381 INFO L124 PetriNetUnfolderBase]: 818/1459 cut-off events. [2024-06-27 20:48:03,382 INFO L125 PetriNetUnfolderBase]: For 219262/219262 co-relation queries the response was YES. [2024-06-27 20:48:03,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10242 conditions, 1459 events. 818/1459 cut-off events. For 219262/219262 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 8033 event pairs, 105 based on Foata normal form. 2/1459 useless extension candidates. Maximal degree in co-relation 10091. Up to 1211 conditions per place. [2024-06-27 20:48:03,398 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 262 selfloop transitions, 47 changer transitions 0/311 dead transitions. [2024-06-27 20:48:03,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 311 transitions, 3618 flow [2024-06-27 20:48:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:03,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:03,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-27 20:48:03,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-27 20:48:03,398 INFO L175 Difference]: Start difference. First operand has 334 places, 290 transitions, 2668 flow. Second operand 10 states and 123 transitions. [2024-06-27 20:48:03,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 311 transitions, 3618 flow [2024-06-27 20:48:04,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 311 transitions, 3562 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:48:04,206 INFO L231 Difference]: Finished difference. Result has 336 places, 291 transitions, 2736 flow [2024-06-27 20:48:04,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2736, PETRI_PLACES=336, PETRI_TRANSITIONS=291} [2024-06-27 20:48:04,207 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 306 predicate places. [2024-06-27 20:48:04,207 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 291 transitions, 2736 flow [2024-06-27 20:48:04,207 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) [2024-06-27 20:48:04,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:04,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:04,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:48:04,207 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)] === [2024-06-27 20:48:04,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:04,208 INFO L85 PathProgramCache]: Analyzing trace with hash 542937145, now seen corresponding path program 14 times [2024-06-27 20:48:04,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:04,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779062691] [2024-06-27 20:48:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:04,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:05,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:05,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779062691] [2024-06-27 20:48:05,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779062691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:05,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:05,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:05,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332943561] [2024-06-27 20:48:05,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:05,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:05,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:05,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:05,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:05,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:05,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 291 transitions, 2736 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) [2024-06-27 20:48:05,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:05,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:05,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:05,976 INFO L124 PetriNetUnfolderBase]: 822/1467 cut-off events. [2024-06-27 20:48:05,976 INFO L125 PetriNetUnfolderBase]: For 223704/223704 co-relation queries the response was YES. [2024-06-27 20:48:05,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10389 conditions, 1467 events. 822/1467 cut-off events. For 223704/223704 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 8111 event pairs, 121 based on Foata normal form. 2/1467 useless extension candidates. Maximal degree in co-relation 10237. Up to 1421 conditions per place. [2024-06-27 20:48:05,994 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 284 selfloop transitions, 19 changer transitions 0/305 dead transitions. [2024-06-27 20:48:05,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 305 transitions, 3408 flow [2024-06-27 20:48:05,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:05,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-27 20:48:05,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:48:05,995 INFO L175 Difference]: Start difference. First operand has 336 places, 291 transitions, 2736 flow. Second operand 10 states and 110 transitions. [2024-06-27 20:48:05,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 305 transitions, 3408 flow [2024-06-27 20:48:06,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 305 transitions, 3260 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 20:48:06,736 INFO L231 Difference]: Finished difference. Result has 337 places, 292 transitions, 2664 flow [2024-06-27 20:48:06,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2664, PETRI_PLACES=337, PETRI_TRANSITIONS=292} [2024-06-27 20:48:06,736 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 307 predicate places. [2024-06-27 20:48:06,736 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 292 transitions, 2664 flow [2024-06-27 20:48:06,736 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) [2024-06-27 20:48:06,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:06,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:06,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:48:06,737 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)] === [2024-06-27 20:48:06,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:06,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1340578514, now seen corresponding path program 17 times [2024-06-27 20:48:06,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:06,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933214517] [2024-06-27 20:48:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:06,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:07,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:07,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933214517] [2024-06-27 20:48:07,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933214517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:07,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:07,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:07,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511120813] [2024-06-27 20:48:07,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:07,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:07,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:07,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:07,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:08,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:08,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 292 transitions, 2664 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) [2024-06-27 20:48:08,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:08,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:08,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:08,567 INFO L124 PetriNetUnfolderBase]: 826/1475 cut-off events. [2024-06-27 20:48:08,567 INFO L125 PetriNetUnfolderBase]: For 227388/227388 co-relation queries the response was YES. [2024-06-27 20:48:08,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10279 conditions, 1475 events. 826/1475 cut-off events. For 227388/227388 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 8167 event pairs, 113 based on Foata normal form. 2/1475 useless extension candidates. Maximal degree in co-relation 10128. Up to 1342 conditions per place. [2024-06-27 20:48:08,584 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 258 selfloop transitions, 46 changer transitions 0/306 dead transitions. [2024-06-27 20:48:08,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 306 transitions, 3329 flow [2024-06-27 20:48:08,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:08,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-27 20:48:08,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-27 20:48:08,585 INFO L175 Difference]: Start difference. First operand has 337 places, 292 transitions, 2664 flow. Second operand 10 states and 117 transitions. [2024-06-27 20:48:08,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 306 transitions, 3329 flow [2024-06-27 20:48:09,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 306 transitions, 3263 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 20:48:09,215 INFO L231 Difference]: Finished difference. Result has 339 places, 293 transitions, 2719 flow [2024-06-27 20:48:09,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2598, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2719, PETRI_PLACES=339, PETRI_TRANSITIONS=293} [2024-06-27 20:48:09,216 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 309 predicate places. [2024-06-27 20:48:09,216 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 293 transitions, 2719 flow [2024-06-27 20:48:09,216 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) [2024-06-27 20:48:09,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:09,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:09,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:48:09,216 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)] === [2024-06-27 20:48:09,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash 542929209, now seen corresponding path program 16 times [2024-06-27 20:48:09,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:09,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797810507] [2024-06-27 20:48:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:09,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:10,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:10,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797810507] [2024-06-27 20:48:10,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797810507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:10,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:10,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:10,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950113035] [2024-06-27 20:48:10,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:10,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:10,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:10,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:10,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:10,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:10,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 293 transitions, 2719 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) [2024-06-27 20:48:10,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:10,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:10,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:11,484 INFO L124 PetriNetUnfolderBase]: 832/1485 cut-off events. [2024-06-27 20:48:11,485 INFO L125 PetriNetUnfolderBase]: For 231122/231122 co-relation queries the response was YES. [2024-06-27 20:48:11,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10384 conditions, 1485 events. 832/1485 cut-off events. For 231122/231122 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8240 event pairs, 117 based on Foata normal form. 2/1485 useless extension candidates. Maximal degree in co-relation 10232. Up to 1412 conditions per place. [2024-06-27 20:48:11,501 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 283 selfloop transitions, 25 changer transitions 0/310 dead transitions. [2024-06-27 20:48:11,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 310 transitions, 3403 flow [2024-06-27 20:48:11,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:11,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-27 20:48:11,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-27 20:48:11,502 INFO L175 Difference]: Start difference. First operand has 339 places, 293 transitions, 2719 flow. Second operand 11 states and 123 transitions. [2024-06-27 20:48:11,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 310 transitions, 3403 flow [2024-06-27 20:48:12,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 310 transitions, 3293 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 20:48:12,273 INFO L231 Difference]: Finished difference. Result has 342 places, 295 transitions, 2694 flow [2024-06-27 20:48:12,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2609, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2694, PETRI_PLACES=342, PETRI_TRANSITIONS=295} [2024-06-27 20:48:12,274 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 312 predicate places. [2024-06-27 20:48:12,274 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 295 transitions, 2694 flow [2024-06-27 20:48:12,274 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) [2024-06-27 20:48:12,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:12,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:12,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:48:12,274 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)] === [2024-06-27 20:48:12,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:12,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1826211554, now seen corresponding path program 18 times [2024-06-27 20:48:12,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:12,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472289749] [2024-06-27 20:48:12,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:12,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:13,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:13,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472289749] [2024-06-27 20:48:13,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472289749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:13,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:13,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:13,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286429840] [2024-06-27 20:48:13,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:13,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:13,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:13,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:13,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:13,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:13,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 295 transitions, 2694 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) [2024-06-27 20:48:13,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:13,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:13,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:14,408 INFO L124 PetriNetUnfolderBase]: 852/1529 cut-off events. [2024-06-27 20:48:14,409 INFO L125 PetriNetUnfolderBase]: For 299687/299687 co-relation queries the response was YES. [2024-06-27 20:48:14,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10538 conditions, 1529 events. 852/1529 cut-off events. For 299687/299687 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 8539 event pairs, 127 based on Foata normal form. 12/1539 useless extension candidates. Maximal degree in co-relation 10385. Up to 1425 conditions per place. [2024-06-27 20:48:14,425 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 285 selfloop transitions, 22 changer transitions 6/315 dead transitions. [2024-06-27 20:48:14,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 315 transitions, 3421 flow [2024-06-27 20:48:14,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:14,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:14,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-27 20:48:14,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-27 20:48:14,426 INFO L175 Difference]: Start difference. First operand has 342 places, 295 transitions, 2694 flow. Second operand 11 states and 126 transitions. [2024-06-27 20:48:14,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 315 transitions, 3421 flow [2024-06-27 20:48:15,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 315 transitions, 3356 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 20:48:15,214 INFO L231 Difference]: Finished difference. Result has 344 places, 295 transitions, 2693 flow [2024-06-27 20:48:15,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2629, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2693, PETRI_PLACES=344, PETRI_TRANSITIONS=295} [2024-06-27 20:48:15,215 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 314 predicate places. [2024-06-27 20:48:15,215 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 295 transitions, 2693 flow [2024-06-27 20:48:15,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:15,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:15,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:15,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:48:15,215 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)] === [2024-06-27 20:48:15,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:15,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1340428629, now seen corresponding path program 17 times [2024-06-27 20:48:15,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:15,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638312074] [2024-06-27 20:48:15,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:15,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:16,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:16,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638312074] [2024-06-27 20:48:16,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638312074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:16,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:16,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:16,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767370126] [2024-06-27 20:48:16,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:16,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:16,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:16,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:16,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:16,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:16,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 295 transitions, 2693 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) [2024-06-27 20:48:16,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:16,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:16,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:17,037 INFO L124 PetriNetUnfolderBase]: 842/1513 cut-off events. [2024-06-27 20:48:17,037 INFO L125 PetriNetUnfolderBase]: For 226365/226365 co-relation queries the response was YES. [2024-06-27 20:48:17,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10240 conditions, 1513 events. 842/1513 cut-off events. For 226365/226365 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 8447 event pairs, 108 based on Foata normal form. 2/1513 useless extension candidates. Maximal degree in co-relation 10086. Up to 1238 conditions per place. [2024-06-27 20:48:17,054 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 240 selfloop transitions, 69 changer transitions 0/311 dead transitions. [2024-06-27 20:48:17,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 311 transitions, 3585 flow [2024-06-27 20:48:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:17,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-27 20:48:17,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-27 20:48:17,055 INFO L175 Difference]: Start difference. First operand has 344 places, 295 transitions, 2693 flow. Second operand 11 states and 130 transitions. [2024-06-27 20:48:17,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 311 transitions, 3585 flow [2024-06-27 20:48:17,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 311 transitions, 3506 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 20:48:17,793 INFO L231 Difference]: Finished difference. Result has 346 places, 295 transitions, 2757 flow [2024-06-27 20:48:17,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2614, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2757, PETRI_PLACES=346, PETRI_TRANSITIONS=295} [2024-06-27 20:48:17,793 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 316 predicate places. [2024-06-27 20:48:17,793 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 295 transitions, 2757 flow [2024-06-27 20:48:17,794 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) [2024-06-27 20:48:17,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:17,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:17,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:48:17,794 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)] === [2024-06-27 20:48:17,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:17,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1141132574, now seen corresponding path program 19 times [2024-06-27 20:48:17,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:17,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229558241] [2024-06-27 20:48:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:17,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:18,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:18,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229558241] [2024-06-27 20:48:18,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229558241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:18,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:18,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:18,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018015258] [2024-06-27 20:48:18,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:18,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:18,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:18,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:18,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:19,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:19,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 295 transitions, 2757 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) [2024-06-27 20:48:19,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:19,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:19,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:19,515 INFO L124 PetriNetUnfolderBase]: 845/1526 cut-off events. [2024-06-27 20:48:19,515 INFO L125 PetriNetUnfolderBase]: For 269418/269418 co-relation queries the response was YES. [2024-06-27 20:48:19,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9689 conditions, 1526 events. 845/1526 cut-off events. For 269418/269418 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 8573 event pairs, 127 based on Foata normal form. 14/1538 useless extension candidates. Maximal degree in co-relation 9534. Up to 1400 conditions per place. [2024-06-27 20:48:19,532 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 280 selfloop transitions, 24 changer transitions 10/316 dead transitions. [2024-06-27 20:48:19,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 316 transitions, 3477 flow [2024-06-27 20:48:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:19,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-27 20:48:19,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-27 20:48:19,533 INFO L175 Difference]: Start difference. First operand has 346 places, 295 transitions, 2757 flow. Second operand 11 states and 131 transitions. [2024-06-27 20:48:19,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 316 transitions, 3477 flow [2024-06-27 20:48:20,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 316 transitions, 3328 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 20:48:20,318 INFO L231 Difference]: Finished difference. Result has 347 places, 292 transitions, 2623 flow [2024-06-27 20:48:20,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2623, PETRI_PLACES=347, PETRI_TRANSITIONS=292} [2024-06-27 20:48:20,318 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 317 predicate places. [2024-06-27 20:48:20,318 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 292 transitions, 2623 flow [2024-06-27 20:48:20,318 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) [2024-06-27 20:48:20,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:20,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:20,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:48:20,319 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)] === [2024-06-27 20:48:20,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:20,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1141126839, now seen corresponding path program 18 times [2024-06-27 20:48:20,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:20,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937267021] [2024-06-27 20:48:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:20,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:21,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:21,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937267021] [2024-06-27 20:48:21,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937267021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:21,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:21,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:21,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439477249] [2024-06-27 20:48:21,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:21,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:21,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:21,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:21,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:21,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 292 transitions, 2623 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) [2024-06-27 20:48:21,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:21,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:21,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:22,411 INFO L124 PetriNetUnfolderBase]: 815/1468 cut-off events. [2024-06-27 20:48:22,412 INFO L125 PetriNetUnfolderBase]: For 192070/192070 co-relation queries the response was YES. [2024-06-27 20:48:22,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9324 conditions, 1468 events. 815/1468 cut-off events. For 192070/192070 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8203 event pairs, 118 based on Foata normal form. 2/1468 useless extension candidates. Maximal degree in co-relation 9168. Up to 1371 conditions per place. [2024-06-27 20:48:22,427 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 277 selfloop transitions, 32 changer transitions 0/311 dead transitions. [2024-06-27 20:48:22,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 311 transitions, 3549 flow [2024-06-27 20:48:22,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:22,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:22,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-27 20:48:22,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-27 20:48:22,428 INFO L175 Difference]: Start difference. First operand has 347 places, 292 transitions, 2623 flow. Second operand 11 states and 129 transitions. [2024-06-27 20:48:22,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 311 transitions, 3549 flow [2024-06-27 20:48:23,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 311 transitions, 3456 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-27 20:48:23,005 INFO L231 Difference]: Finished difference. Result has 347 places, 294 transitions, 2625 flow [2024-06-27 20:48:23,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2625, PETRI_PLACES=347, PETRI_TRANSITIONS=294} [2024-06-27 20:48:23,005 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 317 predicate places. [2024-06-27 20:48:23,006 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 294 transitions, 2625 flow [2024-06-27 20:48:23,006 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) [2024-06-27 20:48:23,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:23,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:23,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:48:23,006 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)] === [2024-06-27 20:48:23,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:23,006 INFO L85 PathProgramCache]: Analyzing trace with hash 542727399, now seen corresponding path program 19 times [2024-06-27 20:48:23,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:23,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989089202] [2024-06-27 20:48:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:23,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:24,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:24,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989089202] [2024-06-27 20:48:24,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989089202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:24,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:24,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:24,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615509222] [2024-06-27 20:48:24,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:24,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:24,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:24,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:24,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:24,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 294 transitions, 2625 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) [2024-06-27 20:48:24,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:24,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:24,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:25,088 INFO L124 PetriNetUnfolderBase]: 789/1416 cut-off events. [2024-06-27 20:48:25,088 INFO L125 PetriNetUnfolderBase]: For 126776/126776 co-relation queries the response was YES. [2024-06-27 20:48:25,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7937 conditions, 1416 events. 789/1416 cut-off events. For 126776/126776 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 7933 event pairs, 100 based on Foata normal form. 2/1416 useless extension candidates. Maximal degree in co-relation 7781. Up to 1343 conditions per place. [2024-06-27 20:48:25,103 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 281 selfloop transitions, 26 changer transitions 0/309 dead transitions. [2024-06-27 20:48:25,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 309 transitions, 3281 flow [2024-06-27 20:48:25,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-27 20:48:25,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-27 20:48:25,104 INFO L175 Difference]: Start difference. First operand has 347 places, 294 transitions, 2625 flow. Second operand 11 states and 122 transitions. [2024-06-27 20:48:25,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 309 transitions, 3281 flow [2024-06-27 20:48:25,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 309 transitions, 3183 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 20:48:25,499 INFO L231 Difference]: Finished difference. Result has 349 places, 294 transitions, 2584 flow [2024-06-27 20:48:25,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2584, PETRI_PLACES=349, PETRI_TRANSITIONS=294} [2024-06-27 20:48:25,499 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 319 predicate places. [2024-06-27 20:48:25,499 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 294 transitions, 2584 flow [2024-06-27 20:48:25,499 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) [2024-06-27 20:48:25,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:25,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:25,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:48:25,500 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)] === [2024-06-27 20:48:25,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:25,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1140925029, now seen corresponding path program 20 times [2024-06-27 20:48:25,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:25,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374664171] [2024-06-27 20:48:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:25,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:26,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:26,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374664171] [2024-06-27 20:48:26,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374664171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:26,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:26,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:26,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274695951] [2024-06-27 20:48:26,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:26,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:26,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:26,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:26,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:26,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:26,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 294 transitions, 2584 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) [2024-06-27 20:48:26,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:26,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:26,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:27,619 INFO L124 PetriNetUnfolderBase]: 785/1410 cut-off events. [2024-06-27 20:48:27,619 INFO L125 PetriNetUnfolderBase]: For 112779/112779 co-relation queries the response was YES. [2024-06-27 20:48:27,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7616 conditions, 1410 events. 785/1410 cut-off events. For 112779/112779 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 7890 event pairs, 101 based on Foata normal form. 2/1410 useless extension candidates. Maximal degree in co-relation 7459. Up to 1316 conditions per place. [2024-06-27 20:48:27,632 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 275 selfloop transitions, 33 changer transitions 0/310 dead transitions. [2024-06-27 20:48:27,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 310 transitions, 3246 flow [2024-06-27 20:48:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-27 20:48:27,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-27 20:48:27,633 INFO L175 Difference]: Start difference. First operand has 349 places, 294 transitions, 2584 flow. Second operand 11 states and 129 transitions. [2024-06-27 20:48:27,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 310 transitions, 3246 flow [2024-06-27 20:48:28,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 310 transitions, 3159 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-27 20:48:28,054 INFO L231 Difference]: Finished difference. Result has 350 places, 294 transitions, 2568 flow [2024-06-27 20:48:28,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2497, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2568, PETRI_PLACES=350, PETRI_TRANSITIONS=294} [2024-06-27 20:48:28,055 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 320 predicate places. [2024-06-27 20:48:28,055 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 294 transitions, 2568 flow [2024-06-27 20:48:28,055 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) [2024-06-27 20:48:28,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:28,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:28,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:48:28,055 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)] === [2024-06-27 20:48:28,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:28,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1133498483, now seen corresponding path program 15 times [2024-06-27 20:48:28,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:28,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112458413] [2024-06-27 20:48:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:28,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:29,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:29,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112458413] [2024-06-27 20:48:29,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112458413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:29,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:29,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:29,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349832268] [2024-06-27 20:48:29,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:29,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:29,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:29,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:29,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:29,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:29,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 294 transitions, 2568 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) [2024-06-27 20:48:29,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:29,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:29,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:29,769 INFO L124 PetriNetUnfolderBase]: 782/1405 cut-off events. [2024-06-27 20:48:29,769 INFO L125 PetriNetUnfolderBase]: For 100579/100579 co-relation queries the response was YES. [2024-06-27 20:48:29,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7327 conditions, 1405 events. 782/1405 cut-off events. For 100579/100579 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 7824 event pairs, 104 based on Foata normal form. 2/1405 useless extension candidates. Maximal degree in co-relation 7169. Up to 1356 conditions per place. [2024-06-27 20:48:29,784 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 286 selfloop transitions, 19 changer transitions 0/307 dead transitions. [2024-06-27 20:48:29,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 307 transitions, 3210 flow [2024-06-27 20:48:29,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:29,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:29,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-27 20:48:29,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:48:29,785 INFO L175 Difference]: Start difference. First operand has 350 places, 294 transitions, 2568 flow. Second operand 10 states and 110 transitions. [2024-06-27 20:48:29,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 307 transitions, 3210 flow [2024-06-27 20:48:30,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 307 transitions, 3029 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-27 20:48:30,147 INFO L231 Difference]: Finished difference. Result has 348 places, 294 transitions, 2429 flow [2024-06-27 20:48:30,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2429, PETRI_PLACES=348, PETRI_TRANSITIONS=294} [2024-06-27 20:48:30,147 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 318 predicate places. [2024-06-27 20:48:30,147 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 294 transitions, 2429 flow [2024-06-27 20:48:30,148 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) [2024-06-27 20:48:30,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:30,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:30,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:48:30,148 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)] === [2024-06-27 20:48:30,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:30,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1923921770, now seen corresponding path program 1 times [2024-06-27 20:48:30,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:30,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603257903] [2024-06-27 20:48:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:30,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:31,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:31,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603257903] [2024-06-27 20:48:31,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603257903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:31,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:31,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:48:31,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724766212] [2024-06-27 20:48:31,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:31,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:48:31,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:31,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:48:31,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:48:31,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:31,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 294 transitions, 2429 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:31,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:31,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:31,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:32,243 INFO L124 PetriNetUnfolderBase]: 823/1492 cut-off events. [2024-06-27 20:48:32,244 INFO L125 PetriNetUnfolderBase]: For 215558/215558 co-relation queries the response was YES. [2024-06-27 20:48:32,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8578 conditions, 1492 events. 823/1492 cut-off events. For 215558/215558 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 8406 event pairs, 127 based on Foata normal form. 8/1498 useless extension candidates. Maximal degree in co-relation 8421. Up to 1200 conditions per place. [2024-06-27 20:48:32,257 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 290 selfloop transitions, 25 changer transitions 16/333 dead transitions. [2024-06-27 20:48:32,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 333 transitions, 3473 flow [2024-06-27 20:48:32,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 20:48:32,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 20:48:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 167 transitions. [2024-06-27 20:48:32,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3847926267281106 [2024-06-27 20:48:32,258 INFO L175 Difference]: Start difference. First operand has 348 places, 294 transitions, 2429 flow. Second operand 14 states and 167 transitions. [2024-06-27 20:48:32,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 333 transitions, 3473 flow [2024-06-27 20:48:32,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 333 transitions, 3355 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 20:48:32,961 INFO L231 Difference]: Finished difference. Result has 353 places, 290 transitions, 2340 flow [2024-06-27 20:48:32,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2340, PETRI_PLACES=353, PETRI_TRANSITIONS=290} [2024-06-27 20:48:32,961 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 323 predicate places. [2024-06-27 20:48:32,961 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 290 transitions, 2340 flow [2024-06-27 20:48:32,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:32,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:32,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:32,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:48:32,962 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)] === [2024-06-27 20:48:32,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:32,962 INFO L85 PathProgramCache]: Analyzing trace with hash -70060666, now seen corresponding path program 2 times [2024-06-27 20:48:32,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:32,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496207412] [2024-06-27 20:48:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:32,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:34,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:34,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496207412] [2024-06-27 20:48:34,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496207412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:34,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:34,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:48:34,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782917045] [2024-06-27 20:48:34,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:34,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:48:34,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:34,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:48:34,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:48:34,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:34,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 290 transitions, 2340 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:34,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:34,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:34,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:35,130 INFO L124 PetriNetUnfolderBase]: 838/1523 cut-off events. [2024-06-27 20:48:35,130 INFO L125 PetriNetUnfolderBase]: For 291216/291216 co-relation queries the response was YES. [2024-06-27 20:48:35,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9843 conditions, 1523 events. 838/1523 cut-off events. For 291216/291216 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 8618 event pairs, 144 based on Foata normal form. 8/1529 useless extension candidates. Maximal degree in co-relation 9685. Up to 1309 conditions per place. [2024-06-27 20:48:35,147 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 289 selfloop transitions, 26 changer transitions 10/327 dead transitions. [2024-06-27 20:48:35,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 327 transitions, 3382 flow [2024-06-27 20:48:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:48:35,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:48:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 158 transitions. [2024-06-27 20:48:35,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920595533498759 [2024-06-27 20:48:35,148 INFO L175 Difference]: Start difference. First operand has 353 places, 290 transitions, 2340 flow. Second operand 13 states and 158 transitions. [2024-06-27 20:48:35,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 327 transitions, 3382 flow [2024-06-27 20:48:36,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 327 transitions, 3284 flow, removed 13 selfloop flow, removed 14 redundant places. [2024-06-27 20:48:36,111 INFO L231 Difference]: Finished difference. Result has 346 places, 289 transitions, 2299 flow [2024-06-27 20:48:36,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2299, PETRI_PLACES=346, PETRI_TRANSITIONS=289} [2024-06-27 20:48:36,112 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 316 predicate places. [2024-06-27 20:48:36,112 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 289 transitions, 2299 flow [2024-06-27 20:48:36,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:36,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:36,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:36,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:48:36,113 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)] === [2024-06-27 20:48:36,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:36,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1865714000, now seen corresponding path program 3 times [2024-06-27 20:48:36,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:36,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746725623] [2024-06-27 20:48:36,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:36,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:37,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:37,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746725623] [2024-06-27 20:48:37,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746725623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:37,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:37,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:48:37,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487093825] [2024-06-27 20:48:37,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:37,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:48:37,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:37,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:48:37,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:48:37,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:37,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 289 transitions, 2299 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:37,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:37,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:37,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:38,424 INFO L124 PetriNetUnfolderBase]: 884/1625 cut-off events. [2024-06-27 20:48:38,424 INFO L125 PetriNetUnfolderBase]: For 442077/442077 co-relation queries the response was YES. [2024-06-27 20:48:38,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11833 conditions, 1625 events. 884/1625 cut-off events. For 442077/442077 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 9399 event pairs, 162 based on Foata normal form. 16/1639 useless extension candidates. Maximal degree in co-relation 11680. Up to 1262 conditions per place. [2024-06-27 20:48:38,441 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 285 selfloop transitions, 26 changer transitions 11/324 dead transitions. [2024-06-27 20:48:38,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 324 transitions, 3315 flow [2024-06-27 20:48:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 20:48:38,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 20:48:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 160 transitions. [2024-06-27 20:48:38,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-27 20:48:38,443 INFO L175 Difference]: Start difference. First operand has 346 places, 289 transitions, 2299 flow. Second operand 14 states and 160 transitions. [2024-06-27 20:48:38,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 324 transitions, 3315 flow [2024-06-27 20:48:39,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 324 transitions, 3270 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 20:48:39,641 INFO L231 Difference]: Finished difference. Result has 347 places, 283 transitions, 2247 flow [2024-06-27 20:48:39,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2247, PETRI_PLACES=347, PETRI_TRANSITIONS=283} [2024-06-27 20:48:39,641 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 317 predicate places. [2024-06-27 20:48:39,641 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 283 transitions, 2247 flow [2024-06-27 20:48:39,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:39,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:39,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:39,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:48:39,642 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)] === [2024-06-27 20:48:39,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:39,642 INFO L85 PathProgramCache]: Analyzing trace with hash -69940696, now seen corresponding path program 4 times [2024-06-27 20:48:39,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:39,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887663140] [2024-06-27 20:48:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:39,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:41,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:41,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887663140] [2024-06-27 20:48:41,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887663140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:41,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:41,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:48:41,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786688742] [2024-06-27 20:48:41,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:41,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:48:41,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:41,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:48:41,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:48:41,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:41,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 283 transitions, 2247 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:41,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:41,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:41,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:41,879 INFO L124 PetriNetUnfolderBase]: 829/1516 cut-off events. [2024-06-27 20:48:41,879 INFO L125 PetriNetUnfolderBase]: For 332007/332007 co-relation queries the response was YES. [2024-06-27 20:48:41,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10297 conditions, 1516 events. 829/1516 cut-off events. For 332007/332007 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 8604 event pairs, 157 based on Foata normal form. 10/1524 useless extension candidates. Maximal degree in co-relation 10156. Up to 1381 conditions per place. [2024-06-27 20:48:41,895 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 272 selfloop transitions, 19 changer transitions 19/312 dead transitions. [2024-06-27 20:48:41,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 312 transitions, 2969 flow [2024-06-27 20:48:41,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:48:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:48:41,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 149 transitions. [2024-06-27 20:48:41,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.369727047146402 [2024-06-27 20:48:41,896 INFO L175 Difference]: Start difference. First operand has 347 places, 283 transitions, 2247 flow. Second operand 13 states and 149 transitions. [2024-06-27 20:48:41,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 312 transitions, 2969 flow [2024-06-27 20:48:42,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 312 transitions, 2907 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-27 20:48:42,964 INFO L231 Difference]: Finished difference. Result has 342 places, 277 transitions, 2168 flow [2024-06-27 20:48:42,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2185, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2168, PETRI_PLACES=342, PETRI_TRANSITIONS=277} [2024-06-27 20:48:42,965 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 312 predicate places. [2024-06-27 20:48:42,965 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 277 transitions, 2168 flow [2024-06-27 20:48:42,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:42,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:42,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:42,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:48:42,965 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)] === [2024-06-27 20:48:42,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:42,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1677461882, now seen corresponding path program 5 times [2024-06-27 20:48:42,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:42,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812103086] [2024-06-27 20:48:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:42,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:44,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:44,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812103086] [2024-06-27 20:48:44,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812103086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:44,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:44,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:48:44,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585201381] [2024-06-27 20:48:44,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:44,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:48:44,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:44,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:48:44,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:48:44,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:44,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 277 transitions, 2168 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:44,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:44,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:44,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:45,179 INFO L124 PetriNetUnfolderBase]: 821/1499 cut-off events. [2024-06-27 20:48:45,180 INFO L125 PetriNetUnfolderBase]: For 326390/326390 co-relation queries the response was YES. [2024-06-27 20:48:45,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10158 conditions, 1499 events. 821/1499 cut-off events. For 326390/326390 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 8464 event pairs, 157 based on Foata normal form. 10/1507 useless extension candidates. Maximal degree in co-relation 10019. Up to 1381 conditions per place. [2024-06-27 20:48:45,195 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 270 selfloop transitions, 19 changer transitions 13/304 dead transitions. [2024-06-27 20:48:45,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 304 transitions, 2886 flow [2024-06-27 20:48:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:48:45,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:48:45,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-27 20:48:45,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-27 20:48:45,196 INFO L175 Difference]: Start difference. First operand has 342 places, 277 transitions, 2168 flow. Second operand 12 states and 136 transitions. [2024-06-27 20:48:45,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 304 transitions, 2886 flow [2024-06-27 20:48:46,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 304 transitions, 2830 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:48:46,047 INFO L231 Difference]: Finished difference. Result has 334 places, 275 transitions, 2142 flow [2024-06-27 20:48:46,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2142, PETRI_PLACES=334, PETRI_TRANSITIONS=275} [2024-06-27 20:48:46,047 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 304 predicate places. [2024-06-27 20:48:46,047 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 275 transitions, 2142 flow [2024-06-27 20:48:46,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:46,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:46,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:46,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:48:46,048 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)] === [2024-06-27 20:48:46,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:46,048 INFO L85 PathProgramCache]: Analyzing trace with hash -543517830, now seen corresponding path program 6 times [2024-06-27 20:48:46,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:46,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425200610] [2024-06-27 20:48:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:46,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:47,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:47,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425200610] [2024-06-27 20:48:47,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425200610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:47,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:47,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:47,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960132436] [2024-06-27 20:48:47,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:47,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:47,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:47,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:47,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:47,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:47,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 275 transitions, 2142 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) [2024-06-27 20:48:47,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:47,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:47,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:47,693 INFO L124 PetriNetUnfolderBase]: 786/1430 cut-off events. [2024-06-27 20:48:47,693 INFO L125 PetriNetUnfolderBase]: For 258324/258324 co-relation queries the response was YES. [2024-06-27 20:48:47,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8961 conditions, 1430 events. 786/1430 cut-off events. For 258324/258324 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 7974 event pairs, 131 based on Foata normal form. 8/1436 useless extension candidates. Maximal degree in co-relation 8823. Up to 1198 conditions per place. [2024-06-27 20:48:47,709 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 276 selfloop transitions, 15 changer transitions 11/304 dead transitions. [2024-06-27 20:48:47,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 304 transitions, 3098 flow [2024-06-27 20:48:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:47,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-27 20:48:47,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-27 20:48:47,710 INFO L175 Difference]: Start difference. First operand has 334 places, 275 transitions, 2142 flow. Second operand 11 states and 130 transitions. [2024-06-27 20:48:47,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 304 transitions, 3098 flow [2024-06-27 20:48:48,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 304 transitions, 3047 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-27 20:48:48,171 INFO L231 Difference]: Finished difference. Result has 330 places, 271 transitions, 2101 flow [2024-06-27 20:48:48,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2101, PETRI_PLACES=330, PETRI_TRANSITIONS=271} [2024-06-27 20:48:48,172 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 300 predicate places. [2024-06-27 20:48:48,172 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 271 transitions, 2101 flow [2024-06-27 20:48:48,172 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) [2024-06-27 20:48:48,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:48,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:48,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:48:48,172 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)] === [2024-06-27 20:48:48,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:48,172 INFO L85 PathProgramCache]: Analyzing trace with hash -538929210, now seen corresponding path program 7 times [2024-06-27 20:48:48,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:48,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477758530] [2024-06-27 20:48:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:48,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:49,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:49,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477758530] [2024-06-27 20:48:49,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477758530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:49,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:49,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:48:49,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735618923] [2024-06-27 20:48:49,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:49,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:48:49,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:49,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:48:49,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:48:50,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:50,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 271 transitions, 2101 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:50,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:50,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:50,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:50,772 INFO L124 PetriNetUnfolderBase]: 779/1417 cut-off events. [2024-06-27 20:48:50,772 INFO L125 PetriNetUnfolderBase]: For 272154/272154 co-relation queries the response was YES. [2024-06-27 20:48:50,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8910 conditions, 1417 events. 779/1417 cut-off events. For 272154/272154 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 7892 event pairs, 137 based on Foata normal form. 10/1425 useless extension candidates. Maximal degree in co-relation 8773. Up to 1311 conditions per place. [2024-06-27 20:48:50,787 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 267 selfloop transitions, 15 changer transitions 12/296 dead transitions. [2024-06-27 20:48:50,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 296 transitions, 2779 flow [2024-06-27 20:48:50,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:48:50,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:48:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-27 20:48:50,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-27 20:48:50,788 INFO L175 Difference]: Start difference. First operand has 330 places, 271 transitions, 2101 flow. Second operand 12 states and 134 transitions. [2024-06-27 20:48:50,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 296 transitions, 2779 flow [2024-06-27 20:48:51,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 296 transitions, 2748 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 20:48:51,458 INFO L231 Difference]: Finished difference. Result has 327 places, 267 transitions, 2068 flow [2024-06-27 20:48:51,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2070, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2068, PETRI_PLACES=327, PETRI_TRANSITIONS=267} [2024-06-27 20:48:51,458 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 297 predicate places. [2024-06-27 20:48:51,458 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 267 transitions, 2068 flow [2024-06-27 20:48:51,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:51,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:51,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:51,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:48:51,459 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)] === [2024-06-27 20:48:51,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:51,459 INFO L85 PathProgramCache]: Analyzing trace with hash 826385334, now seen corresponding path program 1 times [2024-06-27 20:48:51,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:51,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463060309] [2024-06-27 20:48:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:51,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:52,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:52,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463060309] [2024-06-27 20:48:52,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463060309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:52,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:52,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:48:52,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753227242] [2024-06-27 20:48:52,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:52,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:48:52,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:52,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:48:52,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:48:53,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:53,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 267 transitions, 2068 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:53,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:53,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:53,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:53,527 INFO L124 PetriNetUnfolderBase]: 751/1361 cut-off events. [2024-06-27 20:48:53,527 INFO L125 PetriNetUnfolderBase]: For 197586/197586 co-relation queries the response was YES. [2024-06-27 20:48:53,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8414 conditions, 1361 events. 751/1361 cut-off events. For 197586/197586 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 7504 event pairs, 130 based on Foata normal form. 2/1361 useless extension candidates. Maximal degree in co-relation 8279. Up to 1308 conditions per place. [2024-06-27 20:48:53,540 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 269 selfloop transitions, 15 changer transitions 0/286 dead transitions. [2024-06-27 20:48:53,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 286 transitions, 2696 flow [2024-06-27 20:48:53,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:53,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-27 20:48:53,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-27 20:48:53,542 INFO L175 Difference]: Start difference. First operand has 327 places, 267 transitions, 2068 flow. Second operand 11 states and 117 transitions. [2024-06-27 20:48:53,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 286 transitions, 2696 flow [2024-06-27 20:48:54,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 286 transitions, 2658 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-27 20:48:54,191 INFO L231 Difference]: Finished difference. Result has 323 places, 268 transitions, 2078 flow [2024-06-27 20:48:54,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2078, PETRI_PLACES=323, PETRI_TRANSITIONS=268} [2024-06-27 20:48:54,191 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 293 predicate places. [2024-06-27 20:48:54,191 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 268 transitions, 2078 flow [2024-06-27 20:48:54,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:54,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:54,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:54,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:48:54,192 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)] === [2024-06-27 20:48:54,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:54,192 INFO L85 PathProgramCache]: Analyzing trace with hash 826378390, now seen corresponding path program 8 times [2024-06-27 20:48:54,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:54,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041583967] [2024-06-27 20:48:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:54,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:55,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:55,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041583967] [2024-06-27 20:48:55,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041583967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:55,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:55,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:48:55,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297162054] [2024-06-27 20:48:55,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:55,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:48:55,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:55,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:48:55,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:48:55,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:55,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 268 transitions, 2078 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:55,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:55,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:55,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:56,362 INFO L124 PetriNetUnfolderBase]: 738/1338 cut-off events. [2024-06-27 20:48:56,362 INFO L125 PetriNetUnfolderBase]: For 184263/184263 co-relation queries the response was YES. [2024-06-27 20:48:56,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7202 conditions, 1338 events. 738/1338 cut-off events. For 184263/184263 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 7394 event pairs, 117 based on Foata normal form. 10/1346 useless extension candidates. Maximal degree in co-relation 7067. Up to 1235 conditions per place. [2024-06-27 20:48:56,372 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 267 selfloop transitions, 14 changer transitions 7/290 dead transitions. [2024-06-27 20:48:56,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 290 transitions, 2734 flow [2024-06-27 20:48:56,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:56,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-27 20:48:56,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-27 20:48:56,373 INFO L175 Difference]: Start difference. First operand has 323 places, 268 transitions, 2078 flow. Second operand 11 states and 122 transitions. [2024-06-27 20:48:56,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 290 transitions, 2734 flow [2024-06-27 20:48:56,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 290 transitions, 2696 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 20:48:56,877 INFO L231 Difference]: Finished difference. Result has 325 places, 265 transitions, 2048 flow [2024-06-27 20:48:56,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2048, PETRI_PLACES=325, PETRI_TRANSITIONS=265} [2024-06-27 20:48:56,877 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 295 predicate places. [2024-06-27 20:48:56,877 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 265 transitions, 2048 flow [2024-06-27 20:48:56,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:56,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:56,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:56,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:48:56,878 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)] === [2024-06-27 20:48:56,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:56,878 INFO L85 PathProgramCache]: Analyzing trace with hash 124770538, now seen corresponding path program 2 times [2024-06-27 20:48:56,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:56,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655152914] [2024-06-27 20:48:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:56,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:58,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:58,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655152914] [2024-06-27 20:48:58,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655152914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:58,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:58,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:48:58,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136586148] [2024-06-27 20:48:58,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:58,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:48:58,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:58,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:48:58,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:48:58,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:48:58,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 265 transitions, 2048 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:58,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:58,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:48:58,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:58,945 INFO L124 PetriNetUnfolderBase]: 716/1296 cut-off events. [2024-06-27 20:48:58,945 INFO L125 PetriNetUnfolderBase]: For 134192/134192 co-relation queries the response was YES. [2024-06-27 20:48:58,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7047 conditions, 1296 events. 716/1296 cut-off events. For 134192/134192 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 7152 event pairs, 71 based on Foata normal form. 2/1296 useless extension candidates. Maximal degree in co-relation 6911. Up to 971 conditions per place. [2024-06-27 20:48:58,958 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 199 selfloop transitions, 83 changer transitions 0/284 dead transitions. [2024-06-27 20:48:58,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 284 transitions, 2676 flow [2024-06-27 20:48:58,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-27 20:48:58,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-27 20:48:58,959 INFO L175 Difference]: Start difference. First operand has 325 places, 265 transitions, 2048 flow. Second operand 11 states and 132 transitions. [2024-06-27 20:48:58,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 284 transitions, 2676 flow [2024-06-27 20:48:59,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 284 transitions, 2642 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-27 20:48:59,319 INFO L231 Difference]: Finished difference. Result has 322 places, 266 transitions, 2200 flow [2024-06-27 20:48:59,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2200, PETRI_PLACES=322, PETRI_TRANSITIONS=266} [2024-06-27 20:48:59,320 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2024-06-27 20:48:59,320 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 266 transitions, 2200 flow [2024-06-27 20:48:59,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:59,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:59,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:59,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:48:59,320 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)] === [2024-06-27 20:48:59,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:59,320 INFO L85 PathProgramCache]: Analyzing trace with hash 124532954, now seen corresponding path program 9 times [2024-06-27 20:48:59,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:59,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468772965] [2024-06-27 20:48:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:59,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:01,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:01,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468772965] [2024-06-27 20:49:01,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468772965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:01,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:01,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:01,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655400644] [2024-06-27 20:49:01,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:01,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:01,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:01,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:01,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:01,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:01,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 266 transitions, 2200 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:01,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:01,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:01,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:01,915 INFO L124 PetriNetUnfolderBase]: 732/1332 cut-off events. [2024-06-27 20:49:01,916 INFO L125 PetriNetUnfolderBase]: For 184435/184435 co-relation queries the response was YES. [2024-06-27 20:49:01,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7335 conditions, 1332 events. 732/1332 cut-off events. For 184435/184435 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 7382 event pairs, 97 based on Foata normal form. 10/1340 useless extension candidates. Maximal degree in co-relation 7200. Up to 734 conditions per place. [2024-06-27 20:49:01,929 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 158 selfloop transitions, 122 changer transitions 9/291 dead transitions. [2024-06-27 20:49:01,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 291 transitions, 2870 flow [2024-06-27 20:49:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:49:01,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:49:01,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-06-27 20:49:01,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-27 20:49:01,930 INFO L175 Difference]: Start difference. First operand has 322 places, 266 transitions, 2200 flow. Second operand 12 states and 152 transitions. [2024-06-27 20:49:01,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 291 transitions, 2870 flow [2024-06-27 20:49:02,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 291 transitions, 2694 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 20:49:02,375 INFO L231 Difference]: Finished difference. Result has 325 places, 263 transitions, 2250 flow [2024-06-27 20:49:02,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2250, PETRI_PLACES=325, PETRI_TRANSITIONS=263} [2024-06-27 20:49:02,375 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 295 predicate places. [2024-06-27 20:49:02,376 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 263 transitions, 2250 flow [2024-06-27 20:49:02,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:02,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:02,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:02,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:49:02,376 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)] === [2024-06-27 20:49:02,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:02,377 INFO L85 PathProgramCache]: Analyzing trace with hash 124778908, now seen corresponding path program 3 times [2024-06-27 20:49:02,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:02,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448141970] [2024-06-27 20:49:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:02,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:03,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:03,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448141970] [2024-06-27 20:49:03,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448141970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:03,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:03,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:03,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722608614] [2024-06-27 20:49:03,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:03,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:03,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:03,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:03,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:03,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:03,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 263 transitions, 2250 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:03,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:03,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:03,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:04,273 INFO L124 PetriNetUnfolderBase]: 746/1362 cut-off events. [2024-06-27 20:49:04,274 INFO L125 PetriNetUnfolderBase]: For 215237/215237 co-relation queries the response was YES. [2024-06-27 20:49:04,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8952 conditions, 1362 events. 746/1362 cut-off events. For 215237/215237 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 7587 event pairs, 105 based on Foata normal form. 2/1362 useless extension candidates. Maximal degree in co-relation 8816. Up to 712 conditions per place. [2024-06-27 20:49:04,288 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 162 selfloop transitions, 125 changer transitions 0/289 dead transitions. [2024-06-27 20:49:04,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 289 transitions, 3174 flow [2024-06-27 20:49:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:49:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:49:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-27 20:49:04,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:49:04,289 INFO L175 Difference]: Start difference. First operand has 325 places, 263 transitions, 2250 flow. Second operand 11 states and 143 transitions. [2024-06-27 20:49:04,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 289 transitions, 3174 flow [2024-06-27 20:49:04,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 289 transitions, 2920 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 20:49:04,915 INFO L231 Difference]: Finished difference. Result has 322 places, 265 transitions, 2288 flow [2024-06-27 20:49:04,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2000, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2288, PETRI_PLACES=322, PETRI_TRANSITIONS=265} [2024-06-27 20:49:04,916 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2024-06-27 20:49:04,916 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 265 transitions, 2288 flow [2024-06-27 20:49:04,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:04,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:04,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:04,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:49:04,916 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)] === [2024-06-27 20:49:04,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:04,916 INFO L85 PathProgramCache]: Analyzing trace with hash 118283788, now seen corresponding path program 4 times [2024-06-27 20:49:04,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:04,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905954023] [2024-06-27 20:49:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:04,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:06,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:06,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905954023] [2024-06-27 20:49:06,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905954023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:06,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:06,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:06,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88934649] [2024-06-27 20:49:06,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:06,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:06,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:06,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:06,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:06,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:06,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 265 transitions, 2288 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:06,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:06,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:06,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:07,509 INFO L124 PetriNetUnfolderBase]: 766/1406 cut-off events. [2024-06-27 20:49:07,509 INFO L125 PetriNetUnfolderBase]: For 277401/277401 co-relation queries the response was YES. [2024-06-27 20:49:07,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9113 conditions, 1406 events. 766/1406 cut-off events. For 277401/277401 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 7904 event pairs, 119 based on Foata normal form. 12/1416 useless extension candidates. Maximal degree in co-relation 8978. Up to 816 conditions per place. [2024-06-27 20:49:07,531 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 165 selfloop transitions, 115 changer transitions 7/289 dead transitions. [2024-06-27 20:49:07,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 289 transitions, 2966 flow [2024-06-27 20:49:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:49:07,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:49:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-27 20:49:07,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:49:07,532 INFO L175 Difference]: Start difference. First operand has 322 places, 265 transitions, 2288 flow. Second operand 11 states and 143 transitions. [2024-06-27 20:49:07,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 289 transitions, 2966 flow [2024-06-27 20:49:08,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 289 transitions, 2775 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 20:49:08,196 INFO L231 Difference]: Finished difference. Result has 325 places, 263 transitions, 2332 flow [2024-06-27 20:49:08,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2332, PETRI_PLACES=325, PETRI_TRANSITIONS=263} [2024-06-27 20:49:08,196 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 295 predicate places. [2024-06-27 20:49:08,197 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 263 transitions, 2332 flow [2024-06-27 20:49:08,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:08,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:08,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:08,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:49:08,197 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)] === [2024-06-27 20:49:08,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:08,198 INFO L85 PathProgramCache]: Analyzing trace with hash 118276844, now seen corresponding path program 10 times [2024-06-27 20:49:08,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:08,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552235269] [2024-06-27 20:49:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:08,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:09,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:09,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552235269] [2024-06-27 20:49:09,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552235269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:09,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:09,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:09,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928654393] [2024-06-27 20:49:09,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:09,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:09,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:09,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:09,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:10,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:10,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 263 transitions, 2332 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:10,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:10,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:10,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:10,584 INFO L124 PetriNetUnfolderBase]: 758/1394 cut-off events. [2024-06-27 20:49:10,585 INFO L125 PetriNetUnfolderBase]: For 268396/268396 co-relation queries the response was YES. [2024-06-27 20:49:10,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9230 conditions, 1394 events. 758/1394 cut-off events. For 268396/268396 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 7903 event pairs, 97 based on Foata normal form. 10/1402 useless extension candidates. Maximal degree in co-relation 9094. Up to 1019 conditions per place. [2024-06-27 20:49:10,599 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 198 selfloop transitions, 79 changer transitions 9/288 dead transitions. [2024-06-27 20:49:10,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 288 transitions, 2996 flow [2024-06-27 20:49:10,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:49:10,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:49:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-27 20:49:10,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-27 20:49:10,600 INFO L175 Difference]: Start difference. First operand has 325 places, 263 transitions, 2332 flow. Second operand 12 states and 148 transitions. [2024-06-27 20:49:10,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 288 transitions, 2996 flow [2024-06-27 20:49:11,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 288 transitions, 2756 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 20:49:11,207 INFO L231 Difference]: Finished difference. Result has 326 places, 260 transitions, 2231 flow [2024-06-27 20:49:11,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2092, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2231, PETRI_PLACES=326, PETRI_TRANSITIONS=260} [2024-06-27 20:49:11,207 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 296 predicate places. [2024-06-27 20:49:11,207 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 260 transitions, 2231 flow [2024-06-27 20:49:11,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:11,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:11,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:11,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:49:11,208 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)] === [2024-06-27 20:49:11,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash 118099214, now seen corresponding path program 11 times [2024-06-27 20:49:11,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:11,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248608907] [2024-06-27 20:49:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:11,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:13,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:13,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248608907] [2024-06-27 20:49:13,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248608907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:13,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:13,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:13,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961827430] [2024-06-27 20:49:13,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:13,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:13,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:13,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:13,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:13,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:13,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 260 transitions, 2231 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:13,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:13,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:13,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:13,743 INFO L124 PetriNetUnfolderBase]: 893/1653 cut-off events. [2024-06-27 20:49:13,743 INFO L125 PetriNetUnfolderBase]: For 294730/294730 co-relation queries the response was YES. [2024-06-27 20:49:13,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11011 conditions, 1653 events. 893/1653 cut-off events. For 294730/294730 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 9679 event pairs, 171 based on Foata normal form. 8/1659 useless extension candidates. Maximal degree in co-relation 10875. Up to 1249 conditions per place. [2024-06-27 20:49:13,761 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 260 selfloop transitions, 77 changer transitions 9/348 dead transitions. [2024-06-27 20:49:13,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 348 transitions, 3834 flow [2024-06-27 20:49:13,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:49:13,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:49:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 154 transitions. [2024-06-27 20:49:13,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38213399503722084 [2024-06-27 20:49:13,762 INFO L175 Difference]: Start difference. First operand has 326 places, 260 transitions, 2231 flow. Second operand 13 states and 154 transitions. [2024-06-27 20:49:13,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 348 transitions, 3834 flow [2024-06-27 20:49:14,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 348 transitions, 3584 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 20:49:14,581 INFO L231 Difference]: Finished difference. Result has 332 places, 297 transitions, 2725 flow [2024-06-27 20:49:14,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2725, PETRI_PLACES=332, PETRI_TRANSITIONS=297} [2024-06-27 20:49:14,581 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 302 predicate places. [2024-06-27 20:49:14,581 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 297 transitions, 2725 flow [2024-06-27 20:49:14,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:14,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:14,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:14,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:49:14,582 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)] === [2024-06-27 20:49:14,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:14,582 INFO L85 PathProgramCache]: Analyzing trace with hash -47949992, now seen corresponding path program 5 times [2024-06-27 20:49:14,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:14,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239274987] [2024-06-27 20:49:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:14,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:16,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:16,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239274987] [2024-06-27 20:49:16,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239274987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:16,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:16,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:16,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080767482] [2024-06-27 20:49:16,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:16,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:16,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:16,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:16,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:16,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:16,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 297 transitions, 2725 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:16,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:16,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:16,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:17,244 INFO L124 PetriNetUnfolderBase]: 858/1582 cut-off events. [2024-06-27 20:49:17,245 INFO L125 PetriNetUnfolderBase]: For 237660/237662 co-relation queries the response was YES. [2024-06-27 20:49:17,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9541 conditions, 1582 events. 858/1582 cut-off events. For 237660/237662 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 9166 event pairs, 120 based on Foata normal form. 14/1594 useless extension candidates. Maximal degree in co-relation 9399. Up to 815 conditions per place. [2024-06-27 20:49:17,261 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 178 selfloop transitions, 134 changer transitions 7/321 dead transitions. [2024-06-27 20:49:17,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 321 transitions, 3453 flow [2024-06-27 20:49:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:49:17,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:49:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-06-27 20:49:17,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222873900293255 [2024-06-27 20:49:17,262 INFO L175 Difference]: Start difference. First operand has 332 places, 297 transitions, 2725 flow. Second operand 11 states and 144 transitions. [2024-06-27 20:49:17,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 321 transitions, 3453 flow [2024-06-27 20:49:17,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 321 transitions, 3375 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:49:17,843 INFO L231 Difference]: Finished difference. Result has 334 places, 294 transitions, 2898 flow [2024-06-27 20:49:17,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2898, PETRI_PLACES=334, PETRI_TRANSITIONS=294} [2024-06-27 20:49:17,843 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 304 predicate places. [2024-06-27 20:49:17,843 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 294 transitions, 2898 flow [2024-06-27 20:49:17,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:17,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:17,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:17,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:49:17,844 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)] === [2024-06-27 20:49:17,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:17,844 INFO L85 PathProgramCache]: Analyzing trace with hash -783548044, now seen corresponding path program 12 times [2024-06-27 20:49:17,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:17,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747209015] [2024-06-27 20:49:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:17,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:19,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:19,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747209015] [2024-06-27 20:49:19,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747209015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:19,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:19,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:19,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452636582] [2024-06-27 20:49:19,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:19,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:19,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:19,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:19,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:19,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:19,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 294 transitions, 2898 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:19,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:19,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:19,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:20,148 INFO L124 PetriNetUnfolderBase]: 850/1570 cut-off events. [2024-06-27 20:49:20,149 INFO L125 PetriNetUnfolderBase]: For 225013/225015 co-relation queries the response was YES. [2024-06-27 20:49:20,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9673 conditions, 1570 events. 850/1570 cut-off events. For 225013/225015 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 9127 event pairs, 98 based on Foata normal form. 12/1580 useless extension candidates. Maximal degree in co-relation 9533. Up to 1044 conditions per place. [2024-06-27 20:49:20,166 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 195 selfloop transitions, 110 changer transitions 12/319 dead transitions. [2024-06-27 20:49:20,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 319 transitions, 3624 flow [2024-06-27 20:49:20,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:49:20,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:49:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-27 20:49:20,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-27 20:49:20,167 INFO L175 Difference]: Start difference. First operand has 334 places, 294 transitions, 2898 flow. Second operand 12 states and 147 transitions. [2024-06-27 20:49:20,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 319 transitions, 3624 flow [2024-06-27 20:49:20,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 319 transitions, 3246 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-27 20:49:20,856 INFO L231 Difference]: Finished difference. Result has 333 places, 290 transitions, 2714 flow [2024-06-27 20:49:20,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2520, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2714, PETRI_PLACES=333, PETRI_TRANSITIONS=290} [2024-06-27 20:49:20,857 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 303 predicate places. [2024-06-27 20:49:20,857 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 290 transitions, 2714 flow [2024-06-27 20:49:20,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:20,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:20,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:20,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:49:20,857 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)] === [2024-06-27 20:49:20,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:20,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1743050118, now seen corresponding path program 13 times [2024-06-27 20:49:20,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:20,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494519802] [2024-06-27 20:49:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:20,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:22,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:22,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494519802] [2024-06-27 20:49:22,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494519802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:22,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:22,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:22,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168102822] [2024-06-27 20:49:22,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:22,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:22,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:22,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:22,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:22,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:22,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 290 transitions, 2714 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:22,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:22,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:22,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:23,115 INFO L124 PetriNetUnfolderBase]: 854/1590 cut-off events. [2024-06-27 20:49:23,115 INFO L125 PetriNetUnfolderBase]: For 268483/268485 co-relation queries the response was YES. [2024-06-27 20:49:23,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10336 conditions, 1590 events. 854/1590 cut-off events. For 268483/268485 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 9304 event pairs, 110 based on Foata normal form. 10/1598 useless extension candidates. Maximal degree in co-relation 10197. Up to 991 conditions per place. [2024-06-27 20:49:23,133 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 197 selfloop transitions, 109 changer transitions 10/318 dead transitions. [2024-06-27 20:49:23,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 318 transitions, 3676 flow [2024-06-27 20:49:23,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:49:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:49:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-27 20:49:23,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40053763440860213 [2024-06-27 20:49:23,134 INFO L175 Difference]: Start difference. First operand has 333 places, 290 transitions, 2714 flow. Second operand 12 states and 149 transitions. [2024-06-27 20:49:23,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 318 transitions, 3676 flow [2024-06-27 20:49:23,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 318 transitions, 3448 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-27 20:49:23,854 INFO L231 Difference]: Finished difference. Result has 331 places, 287 transitions, 2693 flow [2024-06-27 20:49:23,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2490, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2693, PETRI_PLACES=331, PETRI_TRANSITIONS=287} [2024-06-27 20:49:23,854 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 301 predicate places. [2024-06-27 20:49:23,855 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 287 transitions, 2693 flow [2024-06-27 20:49:23,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:23,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:23,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:23,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:49:23,855 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)] === [2024-06-27 20:49:23,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1747634088, now seen corresponding path program 14 times [2024-06-27 20:49:23,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:23,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133451908] [2024-06-27 20:49:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:23,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:25,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:25,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133451908] [2024-06-27 20:49:25,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133451908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:25,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:25,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:25,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364177408] [2024-06-27 20:49:25,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:25,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:25,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:25,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:25,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:25,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:25,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 287 transitions, 2693 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:25,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:25,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:25,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:25,958 INFO L124 PetriNetUnfolderBase]: 849/1583 cut-off events. [2024-06-27 20:49:25,958 INFO L125 PetriNetUnfolderBase]: For 263947/263949 co-relation queries the response was YES. [2024-06-27 20:49:25,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10279 conditions, 1583 events. 849/1583 cut-off events. For 263947/263949 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 9250 event pairs, 132 based on Foata normal form. 10/1591 useless extension candidates. Maximal degree in co-relation 10141. Up to 845 conditions per place. [2024-06-27 20:49:25,973 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 172 selfloop transitions, 127 changer transitions 12/313 dead transitions. [2024-06-27 20:49:25,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 313 transitions, 3407 flow [2024-06-27 20:49:25,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:49:25,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:49:25,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-27 20:49:25,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-27 20:49:25,974 INFO L175 Difference]: Start difference. First operand has 331 places, 287 transitions, 2693 flow. Second operand 12 states and 148 transitions. [2024-06-27 20:49:25,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 313 transitions, 3407 flow [2024-06-27 20:49:26,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 313 transitions, 3192 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 20:49:26,811 INFO L231 Difference]: Finished difference. Result has 330 places, 285 transitions, 2722 flow [2024-06-27 20:49:26,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2478, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2722, PETRI_PLACES=330, PETRI_TRANSITIONS=285} [2024-06-27 20:49:26,811 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 300 predicate places. [2024-06-27 20:49:26,811 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 285 transitions, 2722 flow [2024-06-27 20:49:26,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:26,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:26,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:26,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:49:26,812 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)] === [2024-06-27 20:49:26,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:26,812 INFO L85 PathProgramCache]: Analyzing trace with hash -52603216, now seen corresponding path program 15 times [2024-06-27 20:49:26,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:26,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495086039] [2024-06-27 20:49:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:26,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:27,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:27,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495086039] [2024-06-27 20:49:27,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495086039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:27,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:27,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:49:27,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817055697] [2024-06-27 20:49:27,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:27,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:49:27,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:27,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:49:27,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:49:28,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:28,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 285 transitions, 2722 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) [2024-06-27 20:49:28,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:28,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:28,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:28,615 INFO L124 PetriNetUnfolderBase]: 855/1601 cut-off events. [2024-06-27 20:49:28,615 INFO L125 PetriNetUnfolderBase]: For 292162/292164 co-relation queries the response was YES. [2024-06-27 20:49:28,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10996 conditions, 1601 events. 855/1601 cut-off events. For 292162/292164 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 9342 event pairs, 147 based on Foata normal form. 10/1609 useless extension candidates. Maximal degree in co-relation 10859. Up to 823 conditions per place. [2024-06-27 20:49:28,633 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 174 selfloop transitions, 125 changer transitions 10/311 dead transitions. [2024-06-27 20:49:28,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 311 transitions, 3658 flow [2024-06-27 20:49:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:49:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:49:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-27 20:49:28,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:49:28,634 INFO L175 Difference]: Start difference. First operand has 330 places, 285 transitions, 2722 flow. Second operand 11 states and 143 transitions. [2024-06-27 20:49:28,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 311 transitions, 3658 flow [2024-06-27 20:49:29,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 311 transitions, 3398 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 20:49:29,708 INFO L231 Difference]: Finished difference. Result has 328 places, 280 transitions, 2679 flow [2024-06-27 20:49:29,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2464, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2679, PETRI_PLACES=328, PETRI_TRANSITIONS=280} [2024-06-27 20:49:29,709 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 298 predicate places. [2024-06-27 20:49:29,709 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 280 transitions, 2679 flow [2024-06-27 20:49:29,709 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) [2024-06-27 20:49:29,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:29,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:29,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:49:29,709 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)] === [2024-06-27 20:49:29,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:29,709 INFO L85 PathProgramCache]: Analyzing trace with hash 212814606, now seen corresponding path program 16 times [2024-06-27 20:49:29,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:29,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661203171] [2024-06-27 20:49:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:29,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:31,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:31,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661203171] [2024-06-27 20:49:31,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661203171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:31,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:31,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:31,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308848319] [2024-06-27 20:49:31,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:31,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:31,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:31,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:31,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:31,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:31,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 280 transitions, 2679 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:31,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:31,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:31,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:32,020 INFO L124 PetriNetUnfolderBase]: 874/1642 cut-off events. [2024-06-27 20:49:32,020 INFO L125 PetriNetUnfolderBase]: For 355664/355666 co-relation queries the response was YES. [2024-06-27 20:49:32,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12239 conditions, 1642 events. 874/1642 cut-off events. For 355664/355666 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 9641 event pairs, 148 based on Foata normal form. 10/1650 useless extension candidates. Maximal degree in co-relation 12103. Up to 1211 conditions per place. [2024-06-27 20:49:32,040 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 214 selfloop transitions, 87 changer transitions 7/310 dead transitions. [2024-06-27 20:49:32,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 310 transitions, 3637 flow [2024-06-27 20:49:32,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:49:32,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:49:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 153 transitions. [2024-06-27 20:49:32,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2024-06-27 20:49:32,041 INFO L175 Difference]: Start difference. First operand has 328 places, 280 transitions, 2679 flow. Second operand 12 states and 153 transitions. [2024-06-27 20:49:32,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 310 transitions, 3637 flow [2024-06-27 20:49:32,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 310 transitions, 3344 flow, removed 4 selfloop flow, removed 15 redundant places. [2024-06-27 20:49:32,975 INFO L231 Difference]: Finished difference. Result has 323 places, 278 transitions, 2552 flow [2024-06-27 20:49:32,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2552, PETRI_PLACES=323, PETRI_TRANSITIONS=278} [2024-06-27 20:49:32,975 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 293 predicate places. [2024-06-27 20:49:32,975 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 278 transitions, 2552 flow [2024-06-27 20:49:32,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:32,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:32,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:32,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:49:32,976 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)] === [2024-06-27 20:49:32,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:32,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2107563656, now seen corresponding path program 6 times [2024-06-27 20:49:32,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:32,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83479502] [2024-06-27 20:49:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:32,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:34,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:34,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83479502] [2024-06-27 20:49:34,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83479502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:34,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:34,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:34,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045368957] [2024-06-27 20:49:34,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:34,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:34,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:34,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:34,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:34,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:34,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 278 transitions, 2552 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:34,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:34,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:34,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:35,084 INFO L124 PetriNetUnfolderBase]: 860/1612 cut-off events. [2024-06-27 20:49:35,084 INFO L125 PetriNetUnfolderBase]: For 311956/311958 co-relation queries the response was YES. [2024-06-27 20:49:35,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12003 conditions, 1612 events. 860/1612 cut-off events. For 311956/311958 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 9408 event pairs, 160 based on Foata normal form. 4/1614 useless extension candidates. Maximal degree in co-relation 11869. Up to 1465 conditions per place. [2024-06-27 20:49:35,103 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 252 selfloop transitions, 44 changer transitions 0/298 dead transitions. [2024-06-27 20:49:35,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 298 transitions, 3212 flow [2024-06-27 20:49:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:49:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:49:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-27 20:49:35,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-27 20:49:35,104 INFO L175 Difference]: Start difference. First operand has 323 places, 278 transitions, 2552 flow. Second operand 11 states and 131 transitions. [2024-06-27 20:49:35,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 298 transitions, 3212 flow [2024-06-27 20:49:36,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 298 transitions, 3034 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-27 20:49:36,024 INFO L231 Difference]: Finished difference. Result has 321 places, 279 transitions, 2483 flow [2024-06-27 20:49:36,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2483, PETRI_PLACES=321, PETRI_TRANSITIONS=279} [2024-06-27 20:49:36,025 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 291 predicate places. [2024-06-27 20:49:36,025 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 279 transitions, 2483 flow [2024-06-27 20:49:36,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:36,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:36,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:36,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:49:36,026 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)] === [2024-06-27 20:49:36,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:36,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2107105190, now seen corresponding path program 17 times [2024-06-27 20:49:36,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:36,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441001745] [2024-06-27 20:49:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:36,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:37,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:37,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441001745] [2024-06-27 20:49:37,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441001745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:37,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:37,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:37,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69878408] [2024-06-27 20:49:37,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:37,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:37,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:37,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:37,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:37,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:37,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 279 transitions, 2483 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:37,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:37,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:37,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:38,721 INFO L124 PetriNetUnfolderBase]: 876/1648 cut-off events. [2024-06-27 20:49:38,721 INFO L125 PetriNetUnfolderBase]: For 361536/361538 co-relation queries the response was YES. [2024-06-27 20:49:38,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12016 conditions, 1648 events. 876/1648 cut-off events. For 361536/361538 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 9701 event pairs, 162 based on Foata normal form. 12/1658 useless extension candidates. Maximal degree in co-relation 11883. Up to 1424 conditions per place. [2024-06-27 20:49:38,737 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 246 selfloop transitions, 46 changer transitions 10/304 dead transitions. [2024-06-27 20:49:38,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 304 transitions, 3179 flow [2024-06-27 20:49:38,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:49:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:49:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-27 20:49:38,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-27 20:49:38,738 INFO L175 Difference]: Start difference. First operand has 321 places, 279 transitions, 2483 flow. Second operand 12 states and 147 transitions. [2024-06-27 20:49:38,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 304 transitions, 3179 flow [2024-06-27 20:49:39,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 304 transitions, 3072 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 20:49:39,817 INFO L231 Difference]: Finished difference. Result has 324 places, 275 transitions, 2433 flow [2024-06-27 20:49:39,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2376, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2433, PETRI_PLACES=324, PETRI_TRANSITIONS=275} [2024-06-27 20:49:39,817 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 294 predicate places. [2024-06-27 20:49:39,817 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 275 transitions, 2433 flow [2024-06-27 20:49:39,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:39,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:39,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:39,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:49:39,818 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)] === [2024-06-27 20:49:39,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:39,818 INFO L85 PathProgramCache]: Analyzing trace with hash 292760152, now seen corresponding path program 18 times [2024-06-27 20:49:39,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:39,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592905642] [2024-06-27 20:49:39,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:39,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:41,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:41,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592905642] [2024-06-27 20:49:41,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592905642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:41,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:41,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:41,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137408253] [2024-06-27 20:49:41,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:41,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:41,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:41,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:41,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:41,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:41,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 275 transitions, 2433 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:41,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:41,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:41,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:41,912 INFO L124 PetriNetUnfolderBase]: 887/1681 cut-off events. [2024-06-27 20:49:41,912 INFO L125 PetriNetUnfolderBase]: For 418340/418342 co-relation queries the response was YES. [2024-06-27 20:49:41,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13225 conditions, 1681 events. 887/1681 cut-off events. For 418340/418342 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 9998 event pairs, 155 based on Foata normal form. 10/1689 useless extension candidates. Maximal degree in co-relation 13091. Up to 1123 conditions per place. [2024-06-27 20:49:41,929 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 212 selfloop transitions, 81 changer transitions 10/305 dead transitions. [2024-06-27 20:49:41,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 305 transitions, 3379 flow [2024-06-27 20:49:41,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:49:41,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:49:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-06-27 20:49:41,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-27 20:49:41,929 INFO L175 Difference]: Start difference. First operand has 324 places, 275 transitions, 2433 flow. Second operand 12 states and 152 transitions. [2024-06-27 20:49:41,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 305 transitions, 3379 flow [2024-06-27 20:49:43,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 305 transitions, 3262 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-27 20:49:43,005 INFO L231 Difference]: Finished difference. Result has 321 places, 272 transitions, 2465 flow [2024-06-27 20:49:43,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2465, PETRI_PLACES=321, PETRI_TRANSITIONS=272} [2024-06-27 20:49:43,006 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 291 predicate places. [2024-06-27 20:49:43,006 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 272 transitions, 2465 flow [2024-06-27 20:49:43,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:43,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:43,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:43,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:49:43,006 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)] === [2024-06-27 20:49:43,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2107351144, now seen corresponding path program 7 times [2024-06-27 20:49:43,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:43,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947519871] [2024-06-27 20:49:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:43,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:44,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:44,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947519871] [2024-06-27 20:49:44,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947519871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:44,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:44,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:44,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175871036] [2024-06-27 20:49:44,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:44,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:44,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:44,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:44,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:44,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:44,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 272 transitions, 2465 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:44,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:44,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:44,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:45,478 INFO L124 PetriNetUnfolderBase]: 876/1656 cut-off events. [2024-06-27 20:49:45,479 INFO L125 PetriNetUnfolderBase]: For 386674/386676 co-relation queries the response was YES. [2024-06-27 20:49:45,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13436 conditions, 1656 events. 876/1656 cut-off events. For 386674/386676 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 9821 event pairs, 182 based on Foata normal form. 4/1658 useless extension candidates. Maximal degree in co-relation 13303. Up to 1482 conditions per place. [2024-06-27 20:49:45,495 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 248 selfloop transitions, 44 changer transitions 0/294 dead transitions. [2024-06-27 20:49:45,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 294 transitions, 3359 flow [2024-06-27 20:49:45,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:49:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:49:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-27 20:49:45,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-27 20:49:45,496 INFO L175 Difference]: Start difference. First operand has 321 places, 272 transitions, 2465 flow. Second operand 11 states and 132 transitions. [2024-06-27 20:49:45,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 294 transitions, 3359 flow [2024-06-27 20:49:46,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 294 transitions, 3204 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-27 20:49:46,493 INFO L231 Difference]: Finished difference. Result has 317 places, 274 transitions, 2442 flow [2024-06-27 20:49:46,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2442, PETRI_PLACES=317, PETRI_TRANSITIONS=274} [2024-06-27 20:49:46,493 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 287 predicate places. [2024-06-27 20:49:46,493 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 274 transitions, 2442 flow [2024-06-27 20:49:46,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:46,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:46,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:46,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:49:46,493 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)] === [2024-06-27 20:49:46,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:46,494 INFO L85 PathProgramCache]: Analyzing trace with hash 2100856024, now seen corresponding path program 8 times [2024-06-27 20:49:46,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:46,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135566115] [2024-06-27 20:49:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:46,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:47,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:47,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135566115] [2024-06-27 20:49:47,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135566115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:47,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:47,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:47,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066260469] [2024-06-27 20:49:47,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:47,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:47,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:47,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:47,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:47,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:47,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 274 transitions, 2442 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:47,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:47,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:47,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:48,464 INFO L124 PetriNetUnfolderBase]: 889/1687 cut-off events. [2024-06-27 20:49:48,465 INFO L125 PetriNetUnfolderBase]: For 420998/421000 co-relation queries the response was YES. [2024-06-27 20:49:48,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13152 conditions, 1687 events. 889/1687 cut-off events. For 420998/421000 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 10066 event pairs, 181 based on Foata normal form. 14/1699 useless extension candidates. Maximal degree in co-relation 13021. Up to 1475 conditions per place. [2024-06-27 20:49:48,533 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 245 selfloop transitions, 43 changer transitions 7/297 dead transitions. [2024-06-27 20:49:48,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 297 transitions, 3118 flow [2024-06-27 20:49:48,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:49:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:49:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-27 20:49:48,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-27 20:49:48,534 INFO L175 Difference]: Start difference. First operand has 317 places, 274 transitions, 2442 flow. Second operand 11 states and 136 transitions. [2024-06-27 20:49:48,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 297 transitions, 3118 flow [2024-06-27 20:49:49,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 297 transitions, 3039 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 20:49:49,617 INFO L231 Difference]: Finished difference. Result has 321 places, 271 transitions, 2431 flow [2024-06-27 20:49:49,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2431, PETRI_PLACES=321, PETRI_TRANSITIONS=271} [2024-06-27 20:49:49,617 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 291 predicate places. [2024-06-27 20:49:49,617 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 271 transitions, 2431 flow [2024-06-27 20:49:49,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:49,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:49,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:49,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:49:49,618 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)] === [2024-06-27 20:49:49,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:49,618 INFO L85 PathProgramCache]: Analyzing trace with hash 212819256, now seen corresponding path program 19 times [2024-06-27 20:49:49,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:49,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941214375] [2024-06-27 20:49:49,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:49,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:50,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:50,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941214375] [2024-06-27 20:49:50,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941214375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:50,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:50,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:50,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992970095] [2024-06-27 20:49:50,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:50,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:50,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:50,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:51,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:51,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 271 transitions, 2431 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:51,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:51,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:51,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:51,663 INFO L124 PetriNetUnfolderBase]: 852/1616 cut-off events. [2024-06-27 20:49:51,663 INFO L125 PetriNetUnfolderBase]: For 355184/355186 co-relation queries the response was YES. [2024-06-27 20:49:51,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11890 conditions, 1616 events. 852/1616 cut-off events. For 355184/355186 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 9536 event pairs, 150 based on Foata normal form. 12/1626 useless extension candidates. Maximal degree in co-relation 11757. Up to 1249 conditions per place. [2024-06-27 20:49:51,680 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 198 selfloop transitions, 81 changer transitions 15/296 dead transitions. [2024-06-27 20:49:51,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 296 transitions, 3111 flow [2024-06-27 20:49:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:49:51,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:49:51,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-27 20:49:51,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40053763440860213 [2024-06-27 20:49:51,681 INFO L175 Difference]: Start difference. First operand has 321 places, 271 transitions, 2431 flow. Second operand 12 states and 149 transitions. [2024-06-27 20:49:51,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 296 transitions, 3111 flow [2024-06-27 20:49:52,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 296 transitions, 3012 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-27 20:49:52,729 INFO L231 Difference]: Finished difference. Result has 322 places, 265 transitions, 2447 flow [2024-06-27 20:49:52,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2447, PETRI_PLACES=322, PETRI_TRANSITIONS=265} [2024-06-27 20:49:52,730 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2024-06-27 20:49:52,730 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 265 transitions, 2447 flow [2024-06-27 20:49:52,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:52,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:52,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:52,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 20:49:52,731 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)] === [2024-06-27 20:49:52,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:52,731 INFO L85 PathProgramCache]: Analyzing trace with hash 217287906, now seen corresponding path program 20 times [2024-06-27 20:49:52,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:52,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056985402] [2024-06-27 20:49:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:52,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:54,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:54,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056985402] [2024-06-27 20:49:54,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056985402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:54,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:54,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:54,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511904480] [2024-06-27 20:49:54,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:54,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:54,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:54,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:54,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:54,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:54,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 265 transitions, 2447 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:54,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:54,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:54,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:55,182 INFO L124 PetriNetUnfolderBase]: 840/1596 cut-off events. [2024-06-27 20:49:55,182 INFO L125 PetriNetUnfolderBase]: For 361692/361694 co-relation queries the response was YES. [2024-06-27 20:49:55,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11927 conditions, 1596 events. 840/1596 cut-off events. For 361692/361694 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 9417 event pairs, 152 based on Foata normal form. 12/1606 useless extension candidates. Maximal degree in co-relation 11793. Up to 1310 conditions per place. [2024-06-27 20:49:55,199 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 214 selfloop transitions, 64 changer transitions 11/291 dead transitions. [2024-06-27 20:49:55,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 291 transitions, 3121 flow [2024-06-27 20:49:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:49:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:49:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-27 20:49:55,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40053763440860213 [2024-06-27 20:49:55,200 INFO L175 Difference]: Start difference. First operand has 322 places, 265 transitions, 2447 flow. Second operand 12 states and 149 transitions. [2024-06-27 20:49:55,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 291 transitions, 3121 flow [2024-06-27 20:49:56,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 291 transitions, 2955 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 20:49:56,195 INFO L231 Difference]: Finished difference. Result has 317 places, 262 transitions, 2389 flow [2024-06-27 20:49:56,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2389, PETRI_PLACES=317, PETRI_TRANSITIONS=262} [2024-06-27 20:49:56,195 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 287 predicate places. [2024-06-27 20:49:56,195 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 262 transitions, 2389 flow [2024-06-27 20:49:56,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:56,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:56,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:56,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 20:49:56,195 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)] === [2024-06-27 20:49:56,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:56,196 INFO L85 PathProgramCache]: Analyzing trace with hash 390188360, now seen corresponding path program 9 times [2024-06-27 20:49:56,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:56,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762458165] [2024-06-27 20:49:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:56,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:57,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:57,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762458165] [2024-06-27 20:49:57,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762458165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:57,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:57,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:49:57,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371095104] [2024-06-27 20:49:57,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:57,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:49:57,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:57,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:49:57,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:49:57,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:49:57,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 262 transitions, 2389 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:57,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:57,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:49:57,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:58,316 INFO L124 PetriNetUnfolderBase]: 820/1556 cut-off events. [2024-06-27 20:49:58,316 INFO L125 PetriNetUnfolderBase]: For 306366/306368 co-relation queries the response was YES. [2024-06-27 20:49:58,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11708 conditions, 1556 events. 820/1556 cut-off events. For 306366/306368 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 9106 event pairs, 156 based on Foata normal form. 4/1558 useless extension candidates. Maximal degree in co-relation 11575. Up to 1258 conditions per place. [2024-06-27 20:49:58,333 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 213 selfloop transitions, 68 changer transitions 0/283 dead transitions. [2024-06-27 20:49:58,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 283 transitions, 3027 flow [2024-06-27 20:49:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:49:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:49:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-27 20:49:58,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-27 20:49:58,334 INFO L175 Difference]: Start difference. First operand has 317 places, 262 transitions, 2389 flow. Second operand 11 states and 139 transitions. [2024-06-27 20:49:58,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 283 transitions, 3027 flow [2024-06-27 20:49:59,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 283 transitions, 2895 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:49:59,286 INFO L231 Difference]: Finished difference. Result has 314 places, 263 transitions, 2418 flow [2024-06-27 20:49:59,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2257, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2418, PETRI_PLACES=314, PETRI_TRANSITIONS=263} [2024-06-27 20:49:59,286 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 284 predicate places. [2024-06-27 20:49:59,286 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 263 transitions, 2418 flow [2024-06-27 20:49:59,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:59,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:59,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:59,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 20:49:59,287 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)] === [2024-06-27 20:49:59,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:59,287 INFO L85 PathProgramCache]: Analyzing trace with hash 2100671450, now seen corresponding path program 21 times [2024-06-27 20:49:59,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:59,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010526670] [2024-06-27 20:49:59,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:59,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:00,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:00,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010526670] [2024-06-27 20:50:00,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010526670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:00,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:00,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:00,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336018517] [2024-06-27 20:50:00,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:00,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:00,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:00,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:00,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:00,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:00,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 263 transitions, 2418 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:00,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:00,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:00,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:01,305 INFO L124 PetriNetUnfolderBase]: 861/1643 cut-off events. [2024-06-27 20:50:01,305 INFO L125 PetriNetUnfolderBase]: For 396806/396808 co-relation queries the response was YES. [2024-06-27 20:50:01,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13057 conditions, 1643 events. 861/1643 cut-off events. For 396806/396808 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 9759 event pairs, 171 based on Foata normal form. 10/1651 useless extension candidates. Maximal degree in co-relation 12925. Up to 1369 conditions per place. [2024-06-27 20:50:01,322 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 235 selfloop transitions, 46 changer transitions 9/292 dead transitions. [2024-06-27 20:50:01,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 292 transitions, 3330 flow [2024-06-27 20:50:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:50:01,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:50:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-27 20:50:01,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-27 20:50:01,324 INFO L175 Difference]: Start difference. First operand has 314 places, 263 transitions, 2418 flow. Second operand 12 states and 148 transitions. [2024-06-27 20:50:01,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 292 transitions, 3330 flow [2024-06-27 20:50:02,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 292 transitions, 3181 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 20:50:02,689 INFO L231 Difference]: Finished difference. Result has 317 places, 259 transitions, 2326 flow [2024-06-27 20:50:02,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2326, PETRI_PLACES=317, PETRI_TRANSITIONS=259} [2024-06-27 20:50:02,690 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 287 predicate places. [2024-06-27 20:50:02,690 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 259 transitions, 2326 flow [2024-06-27 20:50:02,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:02,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:02,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:02,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 20:50:02,690 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)] === [2024-06-27 20:50:02,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:02,691 INFO L85 PathProgramCache]: Analyzing trace with hash 217467830, now seen corresponding path program 10 times [2024-06-27 20:50:02,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:02,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421963789] [2024-06-27 20:50:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:02,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:04,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:04,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421963789] [2024-06-27 20:50:04,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421963789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:04,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:04,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:04,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643589373] [2024-06-27 20:50:04,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:04,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:04,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:04,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:04,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:04,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:04,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 259 transitions, 2326 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:04,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:04,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:04,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:04,675 INFO L124 PetriNetUnfolderBase]: 844/1608 cut-off events. [2024-06-27 20:50:04,675 INFO L125 PetriNetUnfolderBase]: For 367501/367503 co-relation queries the response was YES. [2024-06-27 20:50:04,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12926 conditions, 1608 events. 844/1608 cut-off events. For 367501/367503 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 9517 event pairs, 169 based on Foata normal form. 4/1610 useless extension candidates. Maximal degree in co-relation 12793. Up to 1379 conditions per place. [2024-06-27 20:50:04,689 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 216 selfloop transitions, 61 changer transitions 0/279 dead transitions. [2024-06-27 20:50:04,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 279 transitions, 2954 flow [2024-06-27 20:50:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:04,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-27 20:50:04,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-27 20:50:04,690 INFO L175 Difference]: Start difference. First operand has 317 places, 259 transitions, 2326 flow. Second operand 11 states and 133 transitions. [2024-06-27 20:50:04,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 279 transitions, 2954 flow [2024-06-27 20:50:05,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 279 transitions, 2835 flow, removed 2 selfloop flow, removed 15 redundant places. [2024-06-27 20:50:05,895 INFO L231 Difference]: Finished difference. Result has 311 places, 260 transitions, 2356 flow [2024-06-27 20:50:05,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2356, PETRI_PLACES=311, PETRI_TRANSITIONS=260} [2024-06-27 20:50:05,895 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 281 predicate places. [2024-06-27 20:50:05,895 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 260 transitions, 2356 flow [2024-06-27 20:50:05,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:05,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:05,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:05,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 20:50:05,896 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)] === [2024-06-27 20:50:05,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:05,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2122063844, now seen corresponding path program 11 times [2024-06-27 20:50:05,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:05,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843884751] [2024-06-27 20:50:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:05,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:07,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:07,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843884751] [2024-06-27 20:50:07,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843884751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:07,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:07,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:50:07,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060533674] [2024-06-27 20:50:07,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:07,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:50:07,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:07,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:50:07,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:50:07,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:07,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 260 transitions, 2356 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) [2024-06-27 20:50:07,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:07,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:07,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:07,595 INFO L124 PetriNetUnfolderBase]: 848/1616 cut-off events. [2024-06-27 20:50:07,595 INFO L125 PetriNetUnfolderBase]: For 361270/361272 co-relation queries the response was YES. [2024-06-27 20:50:07,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12955 conditions, 1616 events. 848/1616 cut-off events. For 361270/361272 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 9588 event pairs, 183 based on Foata normal form. 4/1618 useless extension candidates. Maximal degree in co-relation 12823. Up to 1513 conditions per place. [2024-06-27 20:50:07,612 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 246 selfloop transitions, 31 changer transitions 0/279 dead transitions. [2024-06-27 20:50:07,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 279 transitions, 2980 flow [2024-06-27 20:50:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-27 20:50:07,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-27 20:50:07,613 INFO L175 Difference]: Start difference. First operand has 311 places, 260 transitions, 2356 flow. Second operand 11 states and 124 transitions. [2024-06-27 20:50:07,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 279 transitions, 2980 flow [2024-06-27 20:50:08,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 279 transitions, 2843 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 20:50:08,559 INFO L231 Difference]: Finished difference. Result has 313 places, 261 transitions, 2309 flow [2024-06-27 20:50:08,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2309, PETRI_PLACES=313, PETRI_TRANSITIONS=261} [2024-06-27 20:50:08,559 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2024-06-27 20:50:08,559 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 261 transitions, 2309 flow [2024-06-27 20:50:08,560 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) [2024-06-27 20:50:08,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:08,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:08,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 20:50:08,560 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)] === [2024-06-27 20:50:08,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:08,561 INFO L85 PathProgramCache]: Analyzing trace with hash 217460886, now seen corresponding path program 22 times [2024-06-27 20:50:08,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:08,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837204291] [2024-06-27 20:50:08,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:08,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:10,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:10,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837204291] [2024-06-27 20:50:10,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837204291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:10,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:10,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:10,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869971843] [2024-06-27 20:50:10,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:10,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:10,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:10,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:10,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:10,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:10,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 261 transitions, 2309 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:10,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:10,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:10,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:11,265 INFO L124 PetriNetUnfolderBase]: 872/1672 cut-off events. [2024-06-27 20:50:11,265 INFO L125 PetriNetUnfolderBase]: For 452591/452593 co-relation queries the response was YES. [2024-06-27 20:50:11,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13084 conditions, 1672 events. 872/1672 cut-off events. For 452591/452593 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10068 event pairs, 183 based on Foata normal form. 18/1688 useless extension candidates. Maximal degree in co-relation 12951. Up to 1365 conditions per place. [2024-06-27 20:50:11,284 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 211 selfloop transitions, 55 changer transitions 18/286 dead transitions. [2024-06-27 20:50:11,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 286 transitions, 2969 flow [2024-06-27 20:50:11,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:50:11,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:50:11,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-27 20:50:11,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-27 20:50:11,286 INFO L175 Difference]: Start difference. First operand has 313 places, 261 transitions, 2309 flow. Second operand 12 states and 147 transitions. [2024-06-27 20:50:11,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 286 transitions, 2969 flow [2024-06-27 20:50:12,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 286 transitions, 2889 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 20:50:12,359 INFO L231 Difference]: Finished difference. Result has 316 places, 253 transitions, 2273 flow [2024-06-27 20:50:12,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2273, PETRI_PLACES=316, PETRI_TRANSITIONS=253} [2024-06-27 20:50:12,360 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 286 predicate places. [2024-06-27 20:50:12,360 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 253 transitions, 2273 flow [2024-06-27 20:50:12,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:12,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:12,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:12,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 20:50:12,360 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)] === [2024-06-27 20:50:12,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:12,360 INFO L85 PathProgramCache]: Analyzing trace with hash 297344122, now seen corresponding path program 23 times [2024-06-27 20:50:12,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:12,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122560691] [2024-06-27 20:50:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:12,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:13,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:13,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122560691] [2024-06-27 20:50:13,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122560691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:13,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:13,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:13,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903221393] [2024-06-27 20:50:13,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:13,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:13,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:13,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:13,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:14,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:14,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 253 transitions, 2273 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:14,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:14,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:14,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:14,702 INFO L124 PetriNetUnfolderBase]: 834/1602 cut-off events. [2024-06-27 20:50:14,702 INFO L125 PetriNetUnfolderBase]: For 411374/411376 co-relation queries the response was YES. [2024-06-27 20:50:14,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12893 conditions, 1602 events. 834/1602 cut-off events. For 411374/411376 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 9537 event pairs, 171 based on Foata normal form. 10/1610 useless extension candidates. Maximal degree in co-relation 12759. Up to 1303 conditions per place. [2024-06-27 20:50:14,719 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 207 selfloop transitions, 52 changer transitions 15/276 dead transitions. [2024-06-27 20:50:14,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 276 transitions, 2895 flow [2024-06-27 20:50:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:50:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:50:14,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-27 20:50:14,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-27 20:50:14,720 INFO L175 Difference]: Start difference. First operand has 316 places, 253 transitions, 2273 flow. Second operand 12 states and 142 transitions. [2024-06-27 20:50:14,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 276 transitions, 2895 flow [2024-06-27 20:50:15,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 276 transitions, 2775 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-27 20:50:15,872 INFO L231 Difference]: Finished difference. Result has 310 places, 247 transitions, 2218 flow [2024-06-27 20:50:15,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2218, PETRI_PLACES=310, PETRI_TRANSITIONS=247} [2024-06-27 20:50:15,872 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 280 predicate places. [2024-06-27 20:50:15,873 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 247 transitions, 2218 flow [2024-06-27 20:50:15,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:15,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:15,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:15,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 20:50:15,873 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)] === [2024-06-27 20:50:15,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:15,873 INFO L85 PathProgramCache]: Analyzing trace with hash -2109247866, now seen corresponding path program 24 times [2024-06-27 20:50:15,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:15,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395692869] [2024-06-27 20:50:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:15,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:17,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:17,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395692869] [2024-06-27 20:50:17,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395692869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:17,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:17,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:17,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996413634] [2024-06-27 20:50:17,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:17,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:17,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:17,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:17,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:17,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:17,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 247 transitions, 2218 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:17,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:17,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:17,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:18,628 INFO L124 PetriNetUnfolderBase]: 825/1583 cut-off events. [2024-06-27 20:50:18,628 INFO L125 PetriNetUnfolderBase]: For 401351/401353 co-relation queries the response was YES. [2024-06-27 20:50:18,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12624 conditions, 1583 events. 825/1583 cut-off events. For 401351/401353 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 9392 event pairs, 181 based on Foata normal form. 12/1593 useless extension candidates. Maximal degree in co-relation 12493. Up to 1332 conditions per place. [2024-06-27 20:50:18,646 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 209 selfloop transitions, 49 changer transitions 12/272 dead transitions. [2024-06-27 20:50:18,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 272 transitions, 2850 flow [2024-06-27 20:50:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:50:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:50:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-27 20:50:18,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-27 20:50:18,647 INFO L175 Difference]: Start difference. First operand has 310 places, 247 transitions, 2218 flow. Second operand 12 states and 147 transitions. [2024-06-27 20:50:18,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 272 transitions, 2850 flow [2024-06-27 20:50:19,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 272 transitions, 2738 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-27 20:50:19,628 INFO L231 Difference]: Finished difference. Result has 303 places, 243 transitions, 2170 flow [2024-06-27 20:50:19,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2106, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2170, PETRI_PLACES=303, PETRI_TRANSITIONS=243} [2024-06-27 20:50:19,628 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 273 predicate places. [2024-06-27 20:50:19,629 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 243 transitions, 2170 flow [2024-06-27 20:50:19,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:19,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:19,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:19,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 20:50:19,629 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)] === [2024-06-27 20:50:19,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:19,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2100849080, now seen corresponding path program 25 times [2024-06-27 20:50:19,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:19,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182685693] [2024-06-27 20:50:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:19,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:21,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:21,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182685693] [2024-06-27 20:50:21,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182685693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:21,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:21,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:21,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385529240] [2024-06-27 20:50:21,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:21,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:21,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:21,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:21,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:21,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:21,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 243 transitions, 2170 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:21,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:21,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:21,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:21,992 INFO L124 PetriNetUnfolderBase]: 782/1506 cut-off events. [2024-06-27 20:50:21,992 INFO L125 PetriNetUnfolderBase]: For 323794/323796 co-relation queries the response was YES. [2024-06-27 20:50:22,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11085 conditions, 1506 events. 782/1506 cut-off events. For 323794/323796 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 8880 event pairs, 162 based on Foata normal form. 12/1516 useless extension candidates. Maximal degree in co-relation 10957. Up to 1305 conditions per place. [2024-06-27 20:50:22,008 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 218 selfloop transitions, 38 changer transitions 10/268 dead transitions. [2024-06-27 20:50:22,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 268 transitions, 2794 flow [2024-06-27 20:50:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:50:22,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:50:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-27 20:50:22,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3844086021505376 [2024-06-27 20:50:22,009 INFO L175 Difference]: Start difference. First operand has 303 places, 243 transitions, 2170 flow. Second operand 12 states and 143 transitions. [2024-06-27 20:50:22,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 268 transitions, 2794 flow [2024-06-27 20:50:22,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 268 transitions, 2692 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:50:22,868 INFO L231 Difference]: Finished difference. Result has 301 places, 239 transitions, 2109 flow [2024-06-27 20:50:22,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2109, PETRI_PLACES=301, PETRI_TRANSITIONS=239} [2024-06-27 20:50:22,868 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 271 predicate places. [2024-06-27 20:50:22,868 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 239 transitions, 2109 flow [2024-06-27 20:50:22,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:22,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:22,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:22,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 20:50:22,869 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)] === [2024-06-27 20:50:22,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:22,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2109001912, now seen corresponding path program 12 times [2024-06-27 20:50:22,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:22,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547209206] [2024-06-27 20:50:22,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:22,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:24,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:24,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547209206] [2024-06-27 20:50:24,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547209206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:24,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:24,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:24,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255030505] [2024-06-27 20:50:24,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:24,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:24,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:24,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:24,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:24,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:24,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 239 transitions, 2109 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:24,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:24,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:24,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:25,019 INFO L124 PetriNetUnfolderBase]: 792/1532 cut-off events. [2024-06-27 20:50:25,019 INFO L125 PetriNetUnfolderBase]: For 339947/339949 co-relation queries the response was YES. [2024-06-27 20:50:25,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12368 conditions, 1532 events. 792/1532 cut-off events. For 339947/339949 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9101 event pairs, 173 based on Foata normal form. 4/1534 useless extension candidates. Maximal degree in co-relation 12241. Up to 1203 conditions per place. [2024-06-27 20:50:25,035 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 207 selfloop transitions, 57 changer transitions 0/266 dead transitions. [2024-06-27 20:50:25,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 266 transitions, 2981 flow [2024-06-27 20:50:25,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:25,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:25,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-27 20:50:25,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:50:25,037 INFO L175 Difference]: Start difference. First operand has 301 places, 239 transitions, 2109 flow. Second operand 11 states and 143 transitions. [2024-06-27 20:50:25,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 266 transitions, 2981 flow [2024-06-27 20:50:25,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 266 transitions, 2894 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 20:50:25,873 INFO L231 Difference]: Finished difference. Result has 297 places, 241 transitions, 2190 flow [2024-06-27 20:50:25,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2190, PETRI_PLACES=297, PETRI_TRANSITIONS=241} [2024-06-27 20:50:25,873 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 267 predicate places. [2024-06-27 20:50:25,873 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 241 transitions, 2190 flow [2024-06-27 20:50:25,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:25,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:25,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:25,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 20:50:25,873 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)] === [2024-06-27 20:50:25,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:25,874 INFO L85 PathProgramCache]: Analyzing trace with hash -161870588, now seen corresponding path program 13 times [2024-06-27 20:50:25,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:25,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147016847] [2024-06-27 20:50:25,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:25,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:27,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:27,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147016847] [2024-06-27 20:50:27,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147016847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:27,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:27,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:27,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80849007] [2024-06-27 20:50:27,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:27,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:27,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:27,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:27,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:27,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:27,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 241 transitions, 2190 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:27,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:27,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:27,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:27,786 INFO L124 PetriNetUnfolderBase]: 804/1560 cut-off events. [2024-06-27 20:50:27,787 INFO L125 PetriNetUnfolderBase]: For 364376/364378 co-relation queries the response was YES. [2024-06-27 20:50:27,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12487 conditions, 1560 events. 804/1560 cut-off events. For 364376/364378 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 9348 event pairs, 184 based on Foata normal form. 10/1568 useless extension candidates. Maximal degree in co-relation 12361. Up to 1441 conditions per place. [2024-06-27 20:50:27,799 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 222 selfloop transitions, 25 changer transitions 13/262 dead transitions. [2024-06-27 20:50:27,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 262 transitions, 2794 flow [2024-06-27 20:50:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:27,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-27 20:50:27,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-27 20:50:27,800 INFO L175 Difference]: Start difference. First operand has 297 places, 241 transitions, 2190 flow. Second operand 11 states and 126 transitions. [2024-06-27 20:50:27,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 262 transitions, 2794 flow [2024-06-27 20:50:28,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 262 transitions, 2698 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 20:50:28,574 INFO L231 Difference]: Finished difference. Result has 301 places, 237 transitions, 2115 flow [2024-06-27 20:50:28,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2115, PETRI_PLACES=301, PETRI_TRANSITIONS=237} [2024-06-27 20:50:28,574 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 271 predicate places. [2024-06-27 20:50:28,574 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 237 transitions, 2115 flow [2024-06-27 20:50:28,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:28,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:28,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:28,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 20:50:28,575 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:50:28,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:28,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2115497032, now seen corresponding path program 14 times [2024-06-27 20:50:28,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:28,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581761805] [2024-06-27 20:50:28,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:28,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:29,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:29,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581761805] [2024-06-27 20:50:29,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581761805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:29,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:29,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:50:29,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152318869] [2024-06-27 20:50:29,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:29,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:50:29,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:29,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:50:29,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:50:29,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:29,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 237 transitions, 2115 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) [2024-06-27 20:50:29,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:29,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:29,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:30,343 INFO L124 PetriNetUnfolderBase]: 764/1484 cut-off events. [2024-06-27 20:50:30,344 INFO L125 PetriNetUnfolderBase]: For 328835/328837 co-relation queries the response was YES. [2024-06-27 20:50:30,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10955 conditions, 1484 events. 764/1484 cut-off events. For 328835/328837 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 8806 event pairs, 162 based on Foata normal form. 14/1496 useless extension candidates. Maximal degree in co-relation 10827. Up to 1214 conditions per place. [2024-06-27 20:50:30,358 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 205 selfloop transitions, 47 changer transitions 7/261 dead transitions. [2024-06-27 20:50:30,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 261 transitions, 2723 flow [2024-06-27 20:50:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:30,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:30,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-27 20:50:30,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-27 20:50:30,359 INFO L175 Difference]: Start difference. First operand has 301 places, 237 transitions, 2115 flow. Second operand 11 states and 139 transitions. [2024-06-27 20:50:30,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 261 transitions, 2723 flow [2024-06-27 20:50:31,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 261 transitions, 2653 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 20:50:31,162 INFO L231 Difference]: Finished difference. Result has 297 places, 234 transitions, 2120 flow [2024-06-27 20:50:31,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2045, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2120, PETRI_PLACES=297, PETRI_TRANSITIONS=234} [2024-06-27 20:50:31,162 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 267 predicate places. [2024-06-27 20:50:31,162 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 234 transitions, 2120 flow [2024-06-27 20:50:31,162 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) [2024-06-27 20:50:31,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:31,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:31,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 20:50:31,163 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:50:31,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:31,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2115681606, now seen corresponding path program 26 times [2024-06-27 20:50:31,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:31,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434653912] [2024-06-27 20:50:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:31,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:32,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:32,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434653912] [2024-06-27 20:50:32,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434653912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:32,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:32,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:32,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375045744] [2024-06-27 20:50:32,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:32,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:32,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:32,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:32,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:32,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:32,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 234 transitions, 2120 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:32,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:32,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:32,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:33,207 INFO L124 PetriNetUnfolderBase]: 752/1464 cut-off events. [2024-06-27 20:50:33,207 INFO L125 PetriNetUnfolderBase]: For 295163/295165 co-relation queries the response was YES. [2024-06-27 20:50:33,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10797 conditions, 1464 events. 752/1464 cut-off events. For 295163/295165 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8655 event pairs, 154 based on Foata normal form. 10/1472 useless extension candidates. Maximal degree in co-relation 10671. Up to 1131 conditions per place. [2024-06-27 20:50:33,223 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 207 selfloop transitions, 44 changer transitions 9/262 dead transitions. [2024-06-27 20:50:33,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 262 transitions, 2956 flow [2024-06-27 20:50:33,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-27 20:50:33,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41348973607038125 [2024-06-27 20:50:33,224 INFO L175 Difference]: Start difference. First operand has 297 places, 234 transitions, 2120 flow. Second operand 11 states and 141 transitions. [2024-06-27 20:50:33,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 262 transitions, 2956 flow [2024-06-27 20:50:34,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 262 transitions, 2842 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-27 20:50:34,297 INFO L231 Difference]: Finished difference. Result has 296 places, 230 transitions, 2068 flow [2024-06-27 20:50:34,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2068, PETRI_PLACES=296, PETRI_TRANSITIONS=230} [2024-06-27 20:50:34,298 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-06-27 20:50:34,298 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 230 transitions, 2068 flow [2024-06-27 20:50:34,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:34,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:34,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:34,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 20:50:34,298 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:50:34,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:34,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2115503976, now seen corresponding path program 27 times [2024-06-27 20:50:34,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:34,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784144451] [2024-06-27 20:50:34,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:34,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:36,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:36,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784144451] [2024-06-27 20:50:36,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784144451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:36,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:36,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:36,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829121677] [2024-06-27 20:50:36,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:36,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:36,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:36,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:36,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:36,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:36,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 230 transitions, 2068 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:36,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:36,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:36,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:37,469 INFO L124 PetriNetUnfolderBase]: 718/1398 cut-off events. [2024-06-27 20:50:37,470 INFO L125 PetriNetUnfolderBase]: For 258196/258198 co-relation queries the response was YES. [2024-06-27 20:50:37,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9556 conditions, 1398 events. 718/1398 cut-off events. For 258196/258198 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 8183 event pairs, 139 based on Foata normal form. 12/1408 useless extension candidates. Maximal degree in co-relation 9429. Up to 1147 conditions per place. [2024-06-27 20:50:37,484 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 201 selfloop transitions, 41 changer transitions 12/256 dead transitions. [2024-06-27 20:50:37,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 256 transitions, 2672 flow [2024-06-27 20:50:37,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:50:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:50:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-27 20:50:37,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897849462365591 [2024-06-27 20:50:37,485 INFO L175 Difference]: Start difference. First operand has 296 places, 230 transitions, 2068 flow. Second operand 12 states and 145 transitions. [2024-06-27 20:50:37,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 256 transitions, 2672 flow [2024-06-27 20:50:38,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 256 transitions, 2580 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:50:38,283 INFO L231 Difference]: Finished difference. Result has 294 places, 226 transitions, 2026 flow [2024-06-27 20:50:38,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1976, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2026, PETRI_PLACES=294, PETRI_TRANSITIONS=226} [2024-06-27 20:50:38,284 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 264 predicate places. [2024-06-27 20:50:38,284 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 226 transitions, 2026 flow [2024-06-27 20:50:38,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:38,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:38,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:38,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 20:50:38,284 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:50:38,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:38,285 INFO L85 PathProgramCache]: Analyzing trace with hash -445714808, now seen corresponding path program 15 times [2024-06-27 20:50:38,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:38,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905241853] [2024-06-27 20:50:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:38,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:39,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:39,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905241853] [2024-06-27 20:50:39,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905241853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:39,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:39,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:39,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47861028] [2024-06-27 20:50:39,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:39,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:39,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:39,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:39,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:39,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:39,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 226 transitions, 2026 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:39,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:39,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:39,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:40,271 INFO L124 PetriNetUnfolderBase]: 698/1364 cut-off events. [2024-06-27 20:50:40,272 INFO L125 PetriNetUnfolderBase]: For 211616/211616 co-relation queries the response was YES. [2024-06-27 20:50:40,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9397 conditions, 1364 events. 698/1364 cut-off events. For 211616/211616 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7958 event pairs, 198 based on Foata normal form. 2/1364 useless extension candidates. Maximal degree in co-relation 9271. Up to 1224 conditions per place. [2024-06-27 20:50:40,284 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 206 selfloop transitions, 37 changer transitions 0/245 dead transitions. [2024-06-27 20:50:40,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 245 transitions, 2608 flow [2024-06-27 20:50:40,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:40,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-27 20:50:40,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-27 20:50:40,285 INFO L175 Difference]: Start difference. First operand has 294 places, 226 transitions, 2026 flow. Second operand 11 states and 125 transitions. [2024-06-27 20:50:40,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 245 transitions, 2608 flow [2024-06-27 20:50:41,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 245 transitions, 2522 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:50:41,078 INFO L231 Difference]: Finished difference. Result has 291 places, 229 transitions, 2074 flow [2024-06-27 20:50:41,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2074, PETRI_PLACES=291, PETRI_TRANSITIONS=229} [2024-06-27 20:50:41,078 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 261 predicate places. [2024-06-27 20:50:41,079 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 229 transitions, 2074 flow [2024-06-27 20:50:41,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:41,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:41,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:41,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 20:50:41,079 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:50:41,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:41,080 INFO L85 PathProgramCache]: Analyzing trace with hash -349062890, now seen corresponding path program 28 times [2024-06-27 20:50:41,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:41,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403788104] [2024-06-27 20:50:41,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:41,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:42,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:42,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403788104] [2024-06-27 20:50:42,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403788104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:42,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:42,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:42,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397969495] [2024-06-27 20:50:42,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:42,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:42,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:42,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:42,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:42,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:42,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 229 transitions, 2074 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:42,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:42,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:42,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:43,562 INFO L124 PetriNetUnfolderBase]: 714/1400 cut-off events. [2024-06-27 20:50:43,562 INFO L125 PetriNetUnfolderBase]: For 248804/248804 co-relation queries the response was YES. [2024-06-27 20:50:43,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9531 conditions, 1400 events. 714/1400 cut-off events. For 248804/248804 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 8229 event pairs, 208 based on Foata normal form. 10/1408 useless extension candidates. Maximal degree in co-relation 9405. Up to 1251 conditions per place. [2024-06-27 20:50:43,573 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 211 selfloop transitions, 28 changer transitions 9/250 dead transitions. [2024-06-27 20:50:43,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 250 transitions, 2648 flow [2024-06-27 20:50:43,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:50:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:50:43,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-27 20:50:43,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-27 20:50:43,574 INFO L175 Difference]: Start difference. First operand has 291 places, 229 transitions, 2074 flow. Second operand 12 states and 138 transitions. [2024-06-27 20:50:43,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 250 transitions, 2648 flow [2024-06-27 20:50:44,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 250 transitions, 2568 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 20:50:44,365 INFO L231 Difference]: Finished difference. Result has 295 places, 226 transitions, 2027 flow [2024-06-27 20:50:44,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2027, PETRI_PLACES=295, PETRI_TRANSITIONS=226} [2024-06-27 20:50:44,365 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 265 predicate places. [2024-06-27 20:50:44,365 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 226 transitions, 2027 flow [2024-06-27 20:50:44,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:44,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:44,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:44,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 20:50:44,366 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:50:44,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:44,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1396393220, now seen corresponding path program 16 times [2024-06-27 20:50:44,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:44,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298541827] [2024-06-27 20:50:44,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:44,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:45,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:45,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298541827] [2024-06-27 20:50:45,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298541827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:45,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:45,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:50:45,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402351317] [2024-06-27 20:50:45,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:45,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:50:45,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:45,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:50:45,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:50:45,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:45,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 226 transitions, 2027 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) [2024-06-27 20:50:45,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:45,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:45,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:46,157 INFO L124 PetriNetUnfolderBase]: 708/1394 cut-off events. [2024-06-27 20:50:46,157 INFO L125 PetriNetUnfolderBase]: For 264414/264414 co-relation queries the response was YES. [2024-06-27 20:50:46,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9510 conditions, 1394 events. 708/1394 cut-off events. For 264414/264414 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 8234 event pairs, 196 based on Foata normal form. 12/1404 useless extension candidates. Maximal degree in co-relation 9383. Up to 1094 conditions per place. [2024-06-27 20:50:46,171 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 174 selfloop transitions, 64 changer transitions 7/247 dead transitions. [2024-06-27 20:50:46,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 247 transitions, 2619 flow [2024-06-27 20:50:46,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-27 20:50:46,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-27 20:50:46,172 INFO L175 Difference]: Start difference. First operand has 295 places, 226 transitions, 2027 flow. Second operand 11 states and 134 transitions. [2024-06-27 20:50:46,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 247 transitions, 2619 flow [2024-06-27 20:50:46,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 247 transitions, 2557 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-27 20:50:46,913 INFO L231 Difference]: Finished difference. Result has 292 places, 224 transitions, 2103 flow [2024-06-27 20:50:46,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2103, PETRI_PLACES=292, PETRI_TRANSITIONS=224} [2024-06-27 20:50:46,913 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 262 predicate places. [2024-06-27 20:50:46,913 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 224 transitions, 2103 flow [2024-06-27 20:50:46,914 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) [2024-06-27 20:50:46,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:46,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:46,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 20:50:46,914 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:50:46,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:46,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1015192826, now seen corresponding path program 29 times [2024-06-27 20:50:46,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:46,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164837104] [2024-06-27 20:50:46,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:46,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:48,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:48,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164837104] [2024-06-27 20:50:48,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164837104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:48,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:48,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:48,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631549432] [2024-06-27 20:50:48,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:48,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:48,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:48,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:48,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:48,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:48,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 224 transitions, 2103 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:48,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:48,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:48,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:49,056 INFO L124 PetriNetUnfolderBase]: 704/1390 cut-off events. [2024-06-27 20:50:49,056 INFO L125 PetriNetUnfolderBase]: For 259936/259936 co-relation queries the response was YES. [2024-06-27 20:50:49,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9593 conditions, 1390 events. 704/1390 cut-off events. For 259936/259936 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 8225 event pairs, 210 based on Foata normal form. 12/1400 useless extension candidates. Maximal degree in co-relation 9467. Up to 1239 conditions per place. [2024-06-27 20:50:49,070 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 206 selfloop transitions, 27 changer transitions 12/247 dead transitions. [2024-06-27 20:50:49,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 247 transitions, 2703 flow [2024-06-27 20:50:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:50:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:50:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-27 20:50:49,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-27 20:50:49,071 INFO L175 Difference]: Start difference. First operand has 292 places, 224 transitions, 2103 flow. Second operand 12 states and 141 transitions. [2024-06-27 20:50:49,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 247 transitions, 2703 flow [2024-06-27 20:50:49,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 247 transitions, 2539 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-27 20:50:49,951 INFO L231 Difference]: Finished difference. Result has 293 places, 219 transitions, 1985 flow [2024-06-27 20:50:49,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1985, PETRI_PLACES=293, PETRI_TRANSITIONS=219} [2024-06-27 20:50:49,952 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 263 predicate places. [2024-06-27 20:50:49,952 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 219 transitions, 1985 flow [2024-06-27 20:50:49,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:49,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:49,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:49,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 20:50:49,953 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:50:49,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:49,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1016068570, now seen corresponding path program 17 times [2024-06-27 20:50:49,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:49,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37042542] [2024-06-27 20:50:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:49,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:51,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:51,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37042542] [2024-06-27 20:50:51,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37042542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:51,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:51,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:51,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985774535] [2024-06-27 20:50:51,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:51,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:51,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:51,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:51,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:51,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:51,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 219 transitions, 1985 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:51,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:51,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:51,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:51,754 INFO L124 PetriNetUnfolderBase]: 690/1372 cut-off events. [2024-06-27 20:50:51,754 INFO L125 PetriNetUnfolderBase]: For 264865/264865 co-relation queries the response was YES. [2024-06-27 20:50:51,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9445 conditions, 1372 events. 690/1372 cut-off events. For 264865/264865 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 8141 event pairs, 212 based on Foata normal form. 12/1382 useless extension candidates. Maximal degree in co-relation 9319. Up to 1249 conditions per place. [2024-06-27 20:50:51,769 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 203 selfloop transitions, 18 changer transitions 16/239 dead transitions. [2024-06-27 20:50:51,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 239 transitions, 2587 flow [2024-06-27 20:50:51,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:51,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-27 20:50:51,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-27 20:50:51,770 INFO L175 Difference]: Start difference. First operand has 293 places, 219 transitions, 1985 flow. Second operand 11 states and 123 transitions. [2024-06-27 20:50:51,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 239 transitions, 2587 flow [2024-06-27 20:50:52,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 239 transitions, 2502 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-27 20:50:52,691 INFO L231 Difference]: Finished difference. Result has 291 places, 213 transitions, 1900 flow [2024-06-27 20:50:52,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1900, PETRI_PLACES=291, PETRI_TRANSITIONS=213} [2024-06-27 20:50:52,692 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 261 predicate places. [2024-06-27 20:50:52,692 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 213 transitions, 1900 flow [2024-06-27 20:50:52,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:52,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:52,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:52,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 20:50:52,692 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:50:52,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:52,692 INFO L85 PathProgramCache]: Analyzing trace with hash -119136696, now seen corresponding path program 18 times [2024-06-27 20:50:52,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:52,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861209578] [2024-06-27 20:50:52,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:52,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:54,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:54,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861209578] [2024-06-27 20:50:54,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861209578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:54,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:54,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:50:54,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942987550] [2024-06-27 20:50:54,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:54,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:50:54,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:54,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:50:54,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:50:54,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:54,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 213 transitions, 1900 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) [2024-06-27 20:50:54,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:54,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:54,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:54,629 INFO L124 PetriNetUnfolderBase]: 650/1300 cut-off events. [2024-06-27 20:50:54,629 INFO L125 PetriNetUnfolderBase]: For 211095/211095 co-relation queries the response was YES. [2024-06-27 20:50:54,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9039 conditions, 1300 events. 650/1300 cut-off events. For 211095/211095 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7678 event pairs, 206 based on Foata normal form. 2/1300 useless extension candidates. Maximal degree in co-relation 8913. Up to 1252 conditions per place. [2024-06-27 20:50:54,642 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 209 selfloop transitions, 17 changer transitions 1/229 dead transitions. [2024-06-27 20:50:54,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 229 transitions, 2428 flow [2024-06-27 20:50:54,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-27 20:50:54,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-27 20:50:54,643 INFO L175 Difference]: Start difference. First operand has 291 places, 213 transitions, 1900 flow. Second operand 11 states and 117 transitions. [2024-06-27 20:50:54,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 229 transitions, 2428 flow [2024-06-27 20:50:55,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 229 transitions, 2377 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-27 20:50:55,518 INFO L231 Difference]: Finished difference. Result has 290 places, 214 transitions, 1923 flow [2024-06-27 20:50:55,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1923, PETRI_PLACES=290, PETRI_TRANSITIONS=214} [2024-06-27 20:50:55,518 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2024-06-27 20:50:55,518 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 214 transitions, 1923 flow [2024-06-27 20:50:55,518 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) [2024-06-27 20:50:55,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:55,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:55,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 20:50:55,519 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:50:55,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:55,519 INFO L85 PathProgramCache]: Analyzing trace with hash -348816936, now seen corresponding path program 19 times [2024-06-27 20:50:55,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:55,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401899546] [2024-06-27 20:50:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:55,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:56,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:56,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401899546] [2024-06-27 20:50:56,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401899546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:56,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:56,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:56,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143845670] [2024-06-27 20:50:56,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:56,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:56,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:56,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:56,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:56,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:56,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 214 transitions, 1923 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:56,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:56,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:56,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:57,352 INFO L124 PetriNetUnfolderBase]: 670/1340 cut-off events. [2024-06-27 20:50:57,352 INFO L125 PetriNetUnfolderBase]: For 275096/275096 co-relation queries the response was YES. [2024-06-27 20:50:57,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10507 conditions, 1340 events. 670/1340 cut-off events. For 275096/275096 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7953 event pairs, 210 based on Foata normal form. 2/1340 useless extension candidates. Maximal degree in co-relation 10381. Up to 1161 conditions per place. [2024-06-27 20:50:57,366 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 204 selfloop transitions, 30 changer transitions 0/236 dead transitions. [2024-06-27 20:50:57,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 236 transitions, 2733 flow [2024-06-27 20:50:57,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:57,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-27 20:50:57,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-27 20:50:57,367 INFO L175 Difference]: Start difference. First operand has 290 places, 214 transitions, 1923 flow. Second operand 11 states and 129 transitions. [2024-06-27 20:50:57,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 236 transitions, 2733 flow [2024-06-27 20:50:58,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 236 transitions, 2673 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 20:50:58,357 INFO L231 Difference]: Finished difference. Result has 293 places, 216 transitions, 1993 flow [2024-06-27 20:50:58,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1993, PETRI_PLACES=293, PETRI_TRANSITIONS=216} [2024-06-27 20:50:58,357 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 263 predicate places. [2024-06-27 20:50:58,357 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 216 transitions, 1993 flow [2024-06-27 20:50:58,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:58,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:58,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:58,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 20:50:58,357 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:50:58,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:58,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1016060200, now seen corresponding path program 20 times [2024-06-27 20:50:58,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:58,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574715330] [2024-06-27 20:50:58,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:58,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:59,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:59,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574715330] [2024-06-27 20:50:59,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574715330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:59,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:59,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:50:59,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61025993] [2024-06-27 20:50:59,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:59,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:50:59,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:50:59,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:50:59,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:50:59,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 216 transitions, 1993 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:59,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:59,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:50:59,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:00,134 INFO L124 PetriNetUnfolderBase]: 682/1368 cut-off events. [2024-06-27 20:51:00,135 INFO L125 PetriNetUnfolderBase]: For 310456/310456 co-relation queries the response was YES. [2024-06-27 20:51:00,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10692 conditions, 1368 events. 682/1368 cut-off events. For 310456/310456 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8138 event pairs, 220 based on Foata normal form. 8/1374 useless extension candidates. Maximal degree in co-relation 10565. Up to 1285 conditions per place. [2024-06-27 20:51:00,157 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 203 selfloop transitions, 14 changer transitions 14/233 dead transitions. [2024-06-27 20:51:00,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 233 transitions, 2537 flow [2024-06-27 20:51:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:00,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-27 20:51:00,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-27 20:51:00,159 INFO L175 Difference]: Start difference. First operand has 293 places, 216 transitions, 1993 flow. Second operand 11 states and 118 transitions. [2024-06-27 20:51:00,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 233 transitions, 2537 flow [2024-06-27 20:51:01,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 233 transitions, 2431 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 20:51:01,088 INFO L231 Difference]: Finished difference. Result has 296 places, 211 transitions, 1881 flow [2024-06-27 20:51:01,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1881, PETRI_PLACES=296, PETRI_TRANSITIONS=211} [2024-06-27 20:51:01,089 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-06-27 20:51:01,089 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 211 transitions, 1881 flow [2024-06-27 20:51:01,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:01,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:01,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:01,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 20:51:01,090 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:01,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:01,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1008699132, now seen corresponding path program 21 times [2024-06-27 20:51:01,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:01,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625872761] [2024-06-27 20:51:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:02,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:02,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625872761] [2024-06-27 20:51:02,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625872761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:02,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:02,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:02,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491580605] [2024-06-27 20:51:02,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:02,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:02,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:02,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:02,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:02,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:02,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 211 transitions, 1881 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:02,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:02,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:02,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:03,476 INFO L124 PetriNetUnfolderBase]: 661/1325 cut-off events. [2024-06-27 20:51:03,476 INFO L125 PetriNetUnfolderBase]: For 285339/285339 co-relation queries the response was YES. [2024-06-27 20:51:03,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10448 conditions, 1325 events. 661/1325 cut-off events. For 285339/285339 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7868 event pairs, 214 based on Foata normal form. 2/1325 useless extension candidates. Maximal degree in co-relation 10320. Up to 1247 conditions per place. [2024-06-27 20:51:03,490 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 200 selfloop transitions, 26 changer transitions 0/228 dead transitions. [2024-06-27 20:51:03,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 228 transitions, 2411 flow [2024-06-27 20:51:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-27 20:51:03,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-27 20:51:03,491 INFO L175 Difference]: Start difference. First operand has 296 places, 211 transitions, 1881 flow. Second operand 11 states and 125 transitions. [2024-06-27 20:51:03,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 228 transitions, 2411 flow [2024-06-27 20:51:04,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 228 transitions, 2332 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-27 20:51:04,445 INFO L231 Difference]: Finished difference. Result has 289 places, 212 transitions, 1894 flow [2024-06-27 20:51:04,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1894, PETRI_PLACES=289, PETRI_TRANSITIONS=212} [2024-06-27 20:51:04,446 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 259 predicate places. [2024-06-27 20:51:04,446 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 212 transitions, 1894 flow [2024-06-27 20:51:04,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:04,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:04,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:04,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 20:51:04,447 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:04,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:04,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1437856182, now seen corresponding path program 30 times [2024-06-27 20:51:04,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:04,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373317236] [2024-06-27 20:51:04,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:04,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:05,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:05,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373317236] [2024-06-27 20:51:05,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373317236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:05,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:05,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:05,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847612263] [2024-06-27 20:51:05,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:05,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:05,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:05,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:05,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:05,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:05,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 212 transitions, 1894 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:05,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:05,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:05,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:06,308 INFO L124 PetriNetUnfolderBase]: 702/1412 cut-off events. [2024-06-27 20:51:06,308 INFO L125 PetriNetUnfolderBase]: For 359171/359171 co-relation queries the response was YES. [2024-06-27 20:51:06,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11603 conditions, 1412 events. 702/1412 cut-off events. For 359171/359171 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8480 event pairs, 227 based on Foata normal form. 8/1418 useless extension candidates. Maximal degree in co-relation 11478. Up to 1206 conditions per place. [2024-06-27 20:51:06,323 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 203 selfloop transitions, 25 changer transitions 8/238 dead transitions. [2024-06-27 20:51:06,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 238 transitions, 2666 flow [2024-06-27 20:51:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:51:06,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:51:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-27 20:51:06,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-27 20:51:06,324 INFO L175 Difference]: Start difference. First operand has 289 places, 212 transitions, 1894 flow. Second operand 12 states and 142 transitions. [2024-06-27 20:51:06,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 238 transitions, 2666 flow [2024-06-27 20:51:07,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 238 transitions, 2584 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 20:51:07,294 INFO L231 Difference]: Finished difference. Result has 292 places, 209 transitions, 1845 flow [2024-06-27 20:51:07,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1845, PETRI_PLACES=292, PETRI_TRANSITIONS=209} [2024-06-27 20:51:07,294 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 262 predicate places. [2024-06-27 20:51:07,294 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 209 transitions, 1845 flow [2024-06-27 20:51:07,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:07,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:07,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:07,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 20:51:07,295 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:07,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:07,295 INFO L85 PathProgramCache]: Analyzing trace with hash -978903848, now seen corresponding path program 22 times [2024-06-27 20:51:07,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:07,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411940617] [2024-06-27 20:51:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:07,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:08,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:08,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411940617] [2024-06-27 20:51:08,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411940617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:08,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:08,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:08,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333836971] [2024-06-27 20:51:08,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:08,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:08,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:08,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:08,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:08,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:08,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 209 transitions, 1845 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:08,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:08,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:08,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:09,085 INFO L124 PetriNetUnfolderBase]: 687/1379 cut-off events. [2024-06-27 20:51:09,085 INFO L125 PetriNetUnfolderBase]: For 333968/333968 co-relation queries the response was YES. [2024-06-27 20:51:09,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11564 conditions, 1379 events. 687/1379 cut-off events. For 333968/333968 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8239 event pairs, 239 based on Foata normal form. 2/1379 useless extension candidates. Maximal degree in co-relation 11438. Up to 1323 conditions per place. [2024-06-27 20:51:09,100 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 205 selfloop transitions, 17 changer transitions 0/224 dead transitions. [2024-06-27 20:51:09,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 224 transitions, 2357 flow [2024-06-27 20:51:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-27 20:51:09,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33724340175953077 [2024-06-27 20:51:09,101 INFO L175 Difference]: Start difference. First operand has 292 places, 209 transitions, 1845 flow. Second operand 11 states and 115 transitions. [2024-06-27 20:51:09,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 224 transitions, 2357 flow [2024-06-27 20:51:10,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 224 transitions, 2307 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:51:10,084 INFO L231 Difference]: Finished difference. Result has 289 places, 210 transitions, 1871 flow [2024-06-27 20:51:10,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1871, PETRI_PLACES=289, PETRI_TRANSITIONS=210} [2024-06-27 20:51:10,085 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 259 predicate places. [2024-06-27 20:51:10,085 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 210 transitions, 1871 flow [2024-06-27 20:51:10,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:10,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:10,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:10,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 20:51:10,085 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:10,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:10,085 INFO L85 PathProgramCache]: Analyzing trace with hash -355312056, now seen corresponding path program 23 times [2024-06-27 20:51:10,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:10,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697951542] [2024-06-27 20:51:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:10,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:11,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:11,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697951542] [2024-06-27 20:51:11,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697951542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:11,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:11,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:51:11,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713519345] [2024-06-27 20:51:11,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:11,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:51:11,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:11,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:51:11,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:51:11,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:11,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 210 transitions, 1871 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) [2024-06-27 20:51:11,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:11,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:11,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:11,762 INFO L124 PetriNetUnfolderBase]: 671/1351 cut-off events. [2024-06-27 20:51:11,763 INFO L125 PetriNetUnfolderBase]: For 317081/317081 co-relation queries the response was YES. [2024-06-27 20:51:11,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10165 conditions, 1351 events. 671/1351 cut-off events. For 317081/317081 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8069 event pairs, 219 based on Foata normal form. 12/1361 useless extension candidates. Maximal degree in co-relation 10040. Up to 1218 conditions per place. [2024-06-27 20:51:11,777 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 194 selfloop transitions, 26 changer transitions 7/229 dead transitions. [2024-06-27 20:51:11,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 229 transitions, 2393 flow [2024-06-27 20:51:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:11,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-27 20:51:11,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-27 20:51:11,778 INFO L175 Difference]: Start difference. First operand has 289 places, 210 transitions, 1871 flow. Second operand 11 states and 127 transitions. [2024-06-27 20:51:11,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 229 transitions, 2393 flow [2024-06-27 20:51:12,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 229 transitions, 2305 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-27 20:51:12,650 INFO L231 Difference]: Finished difference. Result has 291 places, 207 transitions, 1817 flow [2024-06-27 20:51:12,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1817, PETRI_PLACES=291, PETRI_TRANSITIONS=207} [2024-06-27 20:51:12,650 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 261 predicate places. [2024-06-27 20:51:12,650 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 207 transitions, 1817 flow [2024-06-27 20:51:12,650 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) [2024-06-27 20:51:12,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:12,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:12,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-27 20:51:12,650 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:12,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:12,651 INFO L85 PathProgramCache]: Analyzing trace with hash -355496630, now seen corresponding path program 31 times [2024-06-27 20:51:12,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:12,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726238260] [2024-06-27 20:51:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:12,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:14,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:14,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726238260] [2024-06-27 20:51:14,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726238260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:14,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:14,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:14,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571105059] [2024-06-27 20:51:14,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:14,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:14,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:14,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:14,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:14,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:14,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 207 transitions, 1817 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:14,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:14,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:14,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:15,040 INFO L124 PetriNetUnfolderBase]: 688/1390 cut-off events. [2024-06-27 20:51:15,040 INFO L125 PetriNetUnfolderBase]: For 354508/354508 co-relation queries the response was YES. [2024-06-27 20:51:15,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11260 conditions, 1390 events. 688/1390 cut-off events. For 354508/354508 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8354 event pairs, 228 based on Foata normal form. 8/1396 useless extension candidates. Maximal degree in co-relation 11134. Up to 1199 conditions per place. [2024-06-27 20:51:15,052 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 197 selfloop transitions, 25 changer transitions 8/232 dead transitions. [2024-06-27 20:51:15,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 232 transitions, 2575 flow [2024-06-27 20:51:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:51:15,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:51:15,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-27 20:51:15,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-27 20:51:15,053 INFO L175 Difference]: Start difference. First operand has 291 places, 207 transitions, 1817 flow. Second operand 12 states and 138 transitions. [2024-06-27 20:51:15,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 232 transitions, 2575 flow [2024-06-27 20:51:16,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 232 transitions, 2514 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-27 20:51:16,079 INFO L231 Difference]: Finished difference. Result has 292 places, 204 transitions, 1785 flow [2024-06-27 20:51:16,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1785, PETRI_PLACES=292, PETRI_TRANSITIONS=204} [2024-06-27 20:51:16,079 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 262 predicate places. [2024-06-27 20:51:16,079 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 204 transitions, 1785 flow [2024-06-27 20:51:16,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:16,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:16,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:16,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-27 20:51:16,080 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:16,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:16,080 INFO L85 PathProgramCache]: Analyzing trace with hash -355319000, now seen corresponding path program 32 times [2024-06-27 20:51:16,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:16,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222694592] [2024-06-27 20:51:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:16,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:17,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:17,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222694592] [2024-06-27 20:51:17,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222694592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:17,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:17,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:17,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294920521] [2024-06-27 20:51:17,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:17,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:17,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:17,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:17,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:17,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:17,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 204 transitions, 1785 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:17,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:17,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:17,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:18,177 INFO L124 PetriNetUnfolderBase]: 656/1326 cut-off events. [2024-06-27 20:51:18,178 INFO L125 PetriNetUnfolderBase]: For 317608/317608 co-relation queries the response was YES. [2024-06-27 20:51:18,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10063 conditions, 1326 events. 656/1326 cut-off events. For 317608/317608 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7911 event pairs, 219 based on Foata normal form. 10/1334 useless extension candidates. Maximal degree in co-relation 9936. Up to 1202 conditions per place. [2024-06-27 20:51:18,191 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 192 selfloop transitions, 22 changer transitions 9/225 dead transitions. [2024-06-27 20:51:18,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 225 transitions, 2305 flow [2024-06-27 20:51:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:51:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:51:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-27 20:51:18,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-27 20:51:18,192 INFO L175 Difference]: Start difference. First operand has 292 places, 204 transitions, 1785 flow. Second operand 12 states and 134 transitions. [2024-06-27 20:51:18,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 225 transitions, 2305 flow [2024-06-27 20:51:19,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 225 transitions, 2245 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-27 20:51:19,073 INFO L231 Difference]: Finished difference. Result has 288 places, 201 transitions, 1748 flow [2024-06-27 20:51:19,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1725, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1748, PETRI_PLACES=288, PETRI_TRANSITIONS=201} [2024-06-27 20:51:19,073 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2024-06-27 20:51:19,073 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 201 transitions, 1748 flow [2024-06-27 20:51:19,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:19,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:19,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:19,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-27 20:51:19,073 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:19,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1431176488, now seen corresponding path program 24 times [2024-06-27 20:51:19,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:19,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461737774] [2024-06-27 20:51:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:19,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:20,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:20,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461737774] [2024-06-27 20:51:20,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461737774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:20,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:20,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:20,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553154448] [2024-06-27 20:51:20,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:20,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:20,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:20,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:20,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:20,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:20,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 201 transitions, 1748 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:20,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:20,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:20,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:21,203 INFO L124 PetriNetUnfolderBase]: 634/1284 cut-off events. [2024-06-27 20:51:21,203 INFO L125 PetriNetUnfolderBase]: For 264108/264108 co-relation queries the response was YES. [2024-06-27 20:51:21,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9860 conditions, 1284 events. 634/1284 cut-off events. For 264108/264108 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7642 event pairs, 213 based on Foata normal form. 2/1284 useless extension candidates. Maximal degree in co-relation 9736. Up to 1178 conditions per place. [2024-06-27 20:51:21,216 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 187 selfloop transitions, 29 changer transitions 0/218 dead transitions. [2024-06-27 20:51:21,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 218 transitions, 2260 flow [2024-06-27 20:51:21,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:21,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:21,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-27 20:51:21,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-27 20:51:21,217 INFO L175 Difference]: Start difference. First operand has 288 places, 201 transitions, 1748 flow. Second operand 11 states and 126 transitions. [2024-06-27 20:51:21,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 218 transitions, 2260 flow [2024-06-27 20:51:21,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 218 transitions, 2210 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-27 20:51:21,996 INFO L231 Difference]: Finished difference. Result has 284 places, 202 transitions, 1800 flow [2024-06-27 20:51:21,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1800, PETRI_PLACES=284, PETRI_TRANSITIONS=202} [2024-06-27 20:51:21,996 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2024-06-27 20:51:21,996 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 202 transitions, 1800 flow [2024-06-27 20:51:21,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:21,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:21,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:21,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-27 20:51:21,997 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:21,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:21,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1008936716, now seen corresponding path program 33 times [2024-06-27 20:51:21,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:21,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040314959] [2024-06-27 20:51:21,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:21,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:23,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:23,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040314959] [2024-06-27 20:51:23,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040314959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:23,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:23,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:23,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718455097] [2024-06-27 20:51:23,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:23,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:23,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:23,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:23,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:23,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:23,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 202 transitions, 1800 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:23,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:23,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:23,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:24,194 INFO L124 PetriNetUnfolderBase]: 636/1294 cut-off events. [2024-06-27 20:51:24,195 INFO L125 PetriNetUnfolderBase]: For 279260/279260 co-relation queries the response was YES. [2024-06-27 20:51:24,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9461 conditions, 1294 events. 636/1294 cut-off events. For 279260/279260 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7715 event pairs, 213 based on Foata normal form. 10/1302 useless extension candidates. Maximal degree in co-relation 9338. Up to 1172 conditions per place. [2024-06-27 20:51:24,210 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 188 selfloop transitions, 23 changer transitions 11/224 dead transitions. [2024-06-27 20:51:24,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 224 transitions, 2322 flow [2024-06-27 20:51:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:51:24,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:51:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-27 20:51:24,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-27 20:51:24,211 INFO L175 Difference]: Start difference. First operand has 284 places, 202 transitions, 1800 flow. Second operand 12 states and 137 transitions. [2024-06-27 20:51:24,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 224 transitions, 2322 flow [2024-06-27 20:51:25,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 224 transitions, 2230 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 20:51:25,009 INFO L231 Difference]: Finished difference. Result has 287 places, 199 transitions, 1733 flow [2024-06-27 20:51:25,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1708, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1733, PETRI_PLACES=287, PETRI_TRANSITIONS=199} [2024-06-27 20:51:25,009 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 257 predicate places. [2024-06-27 20:51:25,009 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 199 transitions, 1733 flow [2024-06-27 20:51:25,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:25,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:25,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:25,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-27 20:51:25,010 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:25,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:25,011 INFO L85 PathProgramCache]: Analyzing trace with hash -779002152, now seen corresponding path program 25 times [2024-06-27 20:51:25,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:25,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575412526] [2024-06-27 20:51:25,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:25,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:26,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:26,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575412526] [2024-06-27 20:51:26,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575412526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:26,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:26,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:26,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137976722] [2024-06-27 20:51:26,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:26,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:26,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:26,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:26,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:26,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:26,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 199 transitions, 1733 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:26,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:26,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:26,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:27,009 INFO L124 PetriNetUnfolderBase]: 622/1272 cut-off events. [2024-06-27 20:51:27,009 INFO L125 PetriNetUnfolderBase]: For 271060/271060 co-relation queries the response was YES. [2024-06-27 20:51:27,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9386 conditions, 1272 events. 622/1272 cut-off events. For 271060/271060 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7575 event pairs, 211 based on Foata normal form. 8/1278 useless extension candidates. Maximal degree in co-relation 9262. Up to 1179 conditions per place. [2024-06-27 20:51:27,060 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 185 selfloop transitions, 18 changer transitions 12/217 dead transitions. [2024-06-27 20:51:27,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 217 transitions, 2255 flow [2024-06-27 20:51:27,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:27,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:27,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-27 20:51:27,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-27 20:51:27,060 INFO L175 Difference]: Start difference. First operand has 287 places, 199 transitions, 1733 flow. Second operand 11 states and 122 transitions. [2024-06-27 20:51:27,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 217 transitions, 2255 flow [2024-06-27 20:51:27,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 217 transitions, 2205 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:51:27,976 INFO L231 Difference]: Finished difference. Result has 284 places, 196 transitions, 1692 flow [2024-06-27 20:51:27,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1692, PETRI_PLACES=284, PETRI_TRANSITIONS=196} [2024-06-27 20:51:27,976 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2024-06-27 20:51:27,976 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 196 transitions, 1692 flow [2024-06-27 20:51:27,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:27,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:27,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:27,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-27 20:51:27,977 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:27,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:27,977 INFO L85 PathProgramCache]: Analyzing trace with hash -127171896, now seen corresponding path program 26 times [2024-06-27 20:51:27,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:27,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296720868] [2024-06-27 20:51:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:27,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:29,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:29,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296720868] [2024-06-27 20:51:29,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296720868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:29,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:29,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:51:29,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504806255] [2024-06-27 20:51:29,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:29,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:51:29,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:29,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:51:29,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:51:29,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:29,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 196 transitions, 1692 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) [2024-06-27 20:51:29,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:29,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:29,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:29,676 INFO L124 PetriNetUnfolderBase]: 604/1234 cut-off events. [2024-06-27 20:51:29,676 INFO L125 PetriNetUnfolderBase]: For 237806/237806 co-relation queries the response was YES. [2024-06-27 20:51:29,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9187 conditions, 1234 events. 604/1234 cut-off events. For 237806/237806 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7284 event pairs, 209 based on Foata normal form. 2/1234 useless extension candidates. Maximal degree in co-relation 9064. Up to 1172 conditions per place. [2024-06-27 20:51:29,689 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 191 selfloop transitions, 18 changer transitions 0/211 dead transitions. [2024-06-27 20:51:29,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 211 transitions, 2184 flow [2024-06-27 20:51:29,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-27 20:51:29,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-27 20:51:29,690 INFO L175 Difference]: Start difference. First operand has 284 places, 196 transitions, 1692 flow. Second operand 11 states and 117 transitions. [2024-06-27 20:51:29,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 211 transitions, 2184 flow [2024-06-27 20:51:30,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 211 transitions, 2142 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 20:51:30,378 INFO L231 Difference]: Finished difference. Result has 280 places, 197 transitions, 1732 flow [2024-06-27 20:51:30,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1732, PETRI_PLACES=280, PETRI_TRANSITIONS=197} [2024-06-27 20:51:30,379 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 250 predicate places. [2024-06-27 20:51:30,379 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 197 transitions, 1732 flow [2024-06-27 20:51:30,379 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) [2024-06-27 20:51:30,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:30,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:30,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-27 20:51:30,380 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:30,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:30,380 INFO L85 PathProgramCache]: Analyzing trace with hash -118840026, now seen corresponding path program 27 times [2024-06-27 20:51:30,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:30,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242976202] [2024-06-27 20:51:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:30,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:31,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:31,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242976202] [2024-06-27 20:51:31,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242976202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:31,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:31,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:31,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532839941] [2024-06-27 20:51:31,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:31,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:31,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:31,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:31,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:31,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:31,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 197 transitions, 1732 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:31,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:31,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:31,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:32,136 INFO L124 PetriNetUnfolderBase]: 616/1262 cut-off events. [2024-06-27 20:51:32,137 INFO L125 PetriNetUnfolderBase]: For 261168/261168 co-relation queries the response was YES. [2024-06-27 20:51:32,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9311 conditions, 1262 events. 616/1262 cut-off events. For 261168/261168 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7505 event pairs, 211 based on Foata normal form. 8/1268 useless extension candidates. Maximal degree in co-relation 9190. Up to 1190 conditions per place. [2024-06-27 20:51:32,149 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 188 selfloop transitions, 12 changer transitions 12/214 dead transitions. [2024-06-27 20:51:32,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 214 transitions, 2244 flow [2024-06-27 20:51:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-27 20:51:32,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-27 20:51:32,150 INFO L175 Difference]: Start difference. First operand has 280 places, 197 transitions, 1732 flow. Second operand 11 states and 117 transitions. [2024-06-27 20:51:32,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 214 transitions, 2244 flow [2024-06-27 20:51:32,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 214 transitions, 2172 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-27 20:51:32,963 INFO L231 Difference]: Finished difference. Result has 282 places, 194 transitions, 1664 flow [2024-06-27 20:51:32,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1660, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1664, PETRI_PLACES=282, PETRI_TRANSITIONS=194} [2024-06-27 20:51:32,964 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 252 predicate places. [2024-06-27 20:51:32,964 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 194 transitions, 1664 flow [2024-06-27 20:51:32,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:32,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:32,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:32,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-27 20:51:32,964 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:32,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:32,964 INFO L85 PathProgramCache]: Analyzing trace with hash -778713852, now seen corresponding path program 28 times [2024-06-27 20:51:32,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:32,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250657968] [2024-06-27 20:51:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:32,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:34,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:34,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250657968] [2024-06-27 20:51:34,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250657968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:34,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:34,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:34,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100996963] [2024-06-27 20:51:34,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:34,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:34,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:34,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:34,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:34,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:34,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 194 transitions, 1664 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:34,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:34,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:34,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:34,846 INFO L124 PetriNetUnfolderBase]: 606/1244 cut-off events. [2024-06-27 20:51:34,846 INFO L125 PetriNetUnfolderBase]: For 265782/265782 co-relation queries the response was YES. [2024-06-27 20:51:34,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9204 conditions, 1244 events. 606/1244 cut-off events. For 265782/265782 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7386 event pairs, 207 based on Foata normal form. 8/1250 useless extension candidates. Maximal degree in co-relation 9082. Up to 1151 conditions per place. [2024-06-27 20:51:34,858 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 180 selfloop transitions, 15 changer transitions 15/212 dead transitions. [2024-06-27 20:51:34,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 212 transitions, 2176 flow [2024-06-27 20:51:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:34,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-27 20:51:34,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:51:34,859 INFO L175 Difference]: Start difference. First operand has 282 places, 194 transitions, 1664 flow. Second operand 11 states and 121 transitions. [2024-06-27 20:51:34,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 212 transitions, 2176 flow [2024-06-27 20:51:35,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 212 transitions, 2146 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 20:51:35,629 INFO L231 Difference]: Finished difference. Result has 278 places, 190 transitions, 1643 flow [2024-06-27 20:51:35,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1634, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1643, PETRI_PLACES=278, PETRI_TRANSITIONS=190} [2024-06-27 20:51:35,630 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 248 predicate places. [2024-06-27 20:51:35,630 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 190 transitions, 1643 flow [2024-06-27 20:51:35,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:35,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:35,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:35,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-27 20:51:35,630 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:35,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:35,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1396208646, now seen corresponding path program 34 times [2024-06-27 20:51:35,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:35,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657863561] [2024-06-27 20:51:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:35,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:36,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:36,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657863561] [2024-06-27 20:51:36,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657863561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:36,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:36,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:51:36,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683310462] [2024-06-27 20:51:36,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:36,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:51:36,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:36,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:51:36,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:51:36,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:36,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 190 transitions, 1643 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) [2024-06-27 20:51:36,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:36,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:36,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:37,260 INFO L124 PetriNetUnfolderBase]: 623/1279 cut-off events. [2024-06-27 20:51:37,260 INFO L125 PetriNetUnfolderBase]: For 307524/307524 co-relation queries the response was YES. [2024-06-27 20:51:37,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10144 conditions, 1279 events. 623/1279 cut-off events. For 307524/307524 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7608 event pairs, 210 based on Foata normal form. 8/1285 useless extension candidates. Maximal degree in co-relation 10024. Up to 984 conditions per place. [2024-06-27 20:51:37,274 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 160 selfloop transitions, 43 changer transitions 9/214 dead transitions. [2024-06-27 20:51:37,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 214 transitions, 2355 flow [2024-06-27 20:51:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:37,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-27 20:51:37,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-27 20:51:37,275 INFO L175 Difference]: Start difference. First operand has 278 places, 190 transitions, 1643 flow. Second operand 11 states and 135 transitions. [2024-06-27 20:51:37,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 214 transitions, 2355 flow [2024-06-27 20:51:38,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 214 transitions, 2313 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 20:51:38,064 INFO L231 Difference]: Finished difference. Result has 273 places, 186 transitions, 1672 flow [2024-06-27 20:51:38,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1672, PETRI_PLACES=273, PETRI_TRANSITIONS=186} [2024-06-27 20:51:38,064 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 243 predicate places. [2024-06-27 20:51:38,064 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 186 transitions, 1672 flow [2024-06-27 20:51:38,065 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) [2024-06-27 20:51:38,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:38,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:38,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-27 20:51:38,065 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:38,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:38,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1396386276, now seen corresponding path program 35 times [2024-06-27 20:51:38,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:38,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851767] [2024-06-27 20:51:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:38,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:40,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:40,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851767] [2024-06-27 20:51:40,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:40,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:40,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:40,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74913523] [2024-06-27 20:51:40,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:40,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:40,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:40,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:40,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:40,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:40,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 186 transitions, 1672 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:40,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:40,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:40,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:40,716 INFO L124 PetriNetUnfolderBase]: 589/1213 cut-off events. [2024-06-27 20:51:40,716 INFO L125 PetriNetUnfolderBase]: For 257220/257220 co-relation queries the response was YES. [2024-06-27 20:51:40,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8934 conditions, 1213 events. 589/1213 cut-off events. For 257220/257220 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7164 event pairs, 199 based on Foata normal form. 10/1221 useless extension candidates. Maximal degree in co-relation 8816. Up to 1012 conditions per place. [2024-06-27 20:51:40,728 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 152 selfloop transitions, 35 changer transitions 18/207 dead transitions. [2024-06-27 20:51:40,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 207 transitions, 2156 flow [2024-06-27 20:51:40,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:51:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:51:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-27 20:51:40,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-27 20:51:40,729 INFO L175 Difference]: Start difference. First operand has 273 places, 186 transitions, 1672 flow. Second operand 12 states and 137 transitions. [2024-06-27 20:51:40,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 207 transitions, 2156 flow [2024-06-27 20:51:41,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 207 transitions, 2064 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:51:41,514 INFO L231 Difference]: Finished difference. Result has 272 places, 179 transitions, 1602 flow [2024-06-27 20:51:41,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1602, PETRI_PLACES=272, PETRI_TRANSITIONS=179} [2024-06-27 20:51:41,514 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 242 predicate places. [2024-06-27 20:51:41,515 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 179 transitions, 1602 flow [2024-06-27 20:51:41,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:41,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:41,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:41,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-27 20:51:41,515 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:41,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:41,516 INFO L85 PathProgramCache]: Analyzing trace with hash 461268228, now seen corresponding path program 29 times [2024-06-27 20:51:41,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:41,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340268285] [2024-06-27 20:51:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:41,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:42,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:42,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340268285] [2024-06-27 20:51:42,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340268285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:42,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:42,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:42,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910394546] [2024-06-27 20:51:42,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:42,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:42,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:42,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:42,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:42,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:42,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 179 transitions, 1602 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:42,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:42,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:42,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:43,172 INFO L124 PetriNetUnfolderBase]: 558/1152 cut-off events. [2024-06-27 20:51:43,172 INFO L125 PetriNetUnfolderBase]: For 215409/215409 co-relation queries the response was YES. [2024-06-27 20:51:43,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8721 conditions, 1152 events. 558/1152 cut-off events. For 215409/215409 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6741 event pairs, 203 based on Foata normal form. 2/1152 useless extension candidates. Maximal degree in co-relation 8604. Up to 1099 conditions per place. [2024-06-27 20:51:43,181 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 176 selfloop transitions, 16 changer transitions 0/194 dead transitions. [2024-06-27 20:51:43,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 194 transitions, 2058 flow [2024-06-27 20:51:43,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:43,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-27 20:51:43,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3343108504398827 [2024-06-27 20:51:43,182 INFO L175 Difference]: Start difference. First operand has 272 places, 179 transitions, 1602 flow. Second operand 11 states and 114 transitions. [2024-06-27 20:51:43,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 194 transitions, 2058 flow [2024-06-27 20:51:43,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 194 transitions, 1974 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-27 20:51:43,851 INFO L231 Difference]: Finished difference. Result has 262 places, 180 transitions, 1598 flow [2024-06-27 20:51:43,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1598, PETRI_PLACES=262, PETRI_TRANSITIONS=180} [2024-06-27 20:51:43,851 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 232 predicate places. [2024-06-27 20:51:43,851 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 180 transitions, 1598 flow [2024-06-27 20:51:43,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:43,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:43,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:43,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-27 20:51:43,852 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:43,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:43,852 INFO L85 PathProgramCache]: Analyzing trace with hash 969138950, now seen corresponding path program 36 times [2024-06-27 20:51:43,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:43,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941812517] [2024-06-27 20:51:43,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:43,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:44,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:44,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941812517] [2024-06-27 20:51:44,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941812517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:44,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:44,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:44,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846741142] [2024-06-27 20:51:44,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:44,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:44,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:44,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:44,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:45,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:45,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 180 transitions, 1598 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:45,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:45,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:45,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:45,726 INFO L124 PetriNetUnfolderBase]: 592/1226 cut-off events. [2024-06-27 20:51:45,726 INFO L125 PetriNetUnfolderBase]: For 258582/258582 co-relation queries the response was YES. [2024-06-27 20:51:45,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9559 conditions, 1226 events. 592/1226 cut-off events. For 258582/258582 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7280 event pairs, 207 based on Foata normal form. 8/1232 useless extension candidates. Maximal degree in co-relation 9446. Up to 833 conditions per place. [2024-06-27 20:51:45,739 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 153 selfloop transitions, 40 changer transitions 12/207 dead transitions. [2024-06-27 20:51:45,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 207 transitions, 2328 flow [2024-06-27 20:51:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:51:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:51:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-27 20:51:45,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-27 20:51:45,740 INFO L175 Difference]: Start difference. First operand has 262 places, 180 transitions, 1598 flow. Second operand 12 states and 142 transitions. [2024-06-27 20:51:45,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 207 transitions, 2328 flow [2024-06-27 20:51:46,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 207 transitions, 2260 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-27 20:51:46,403 INFO L231 Difference]: Finished difference. Result has 265 places, 175 transitions, 1583 flow [2024-06-27 20:51:46,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1583, PETRI_PLACES=265, PETRI_TRANSITIONS=175} [2024-06-27 20:51:46,404 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2024-06-27 20:51:46,404 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 175 transitions, 1583 flow [2024-06-27 20:51:46,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:46,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:46,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:46,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-27 20:51:46,404 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:46,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:46,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1562442426, now seen corresponding path program 37 times [2024-06-27 20:51:46,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:46,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131527156] [2024-06-27 20:51:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:46,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:47,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:47,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131527156] [2024-06-27 20:51:47,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131527156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:47,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:47,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:51:47,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838174711] [2024-06-27 20:51:47,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:47,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:51:47,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:47,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:51:47,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:51:47,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:47,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 175 transitions, 1583 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) [2024-06-27 20:51:47,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:47,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:47,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:48,037 INFO L124 PetriNetUnfolderBase]: 595/1235 cut-off events. [2024-06-27 20:51:48,037 INFO L125 PetriNetUnfolderBase]: For 289488/289488 co-relation queries the response was YES. [2024-06-27 20:51:48,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10182 conditions, 1235 events. 595/1235 cut-off events. For 289488/289488 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7327 event pairs, 220 based on Foata normal form. 8/1241 useless extension candidates. Maximal degree in co-relation 10068. Up to 949 conditions per place. [2024-06-27 20:51:48,047 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 159 selfloop transitions, 32 changer transitions 7/200 dead transitions. [2024-06-27 20:51:48,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 200 transitions, 2297 flow [2024-06-27 20:51:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:48,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-27 20:51:48,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-27 20:51:48,048 INFO L175 Difference]: Start difference. First operand has 265 places, 175 transitions, 1583 flow. Second operand 11 states and 133 transitions. [2024-06-27 20:51:48,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 200 transitions, 2297 flow [2024-06-27 20:51:48,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 200 transitions, 2179 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-27 20:51:48,688 INFO L231 Difference]: Finished difference. Result has 258 places, 173 transitions, 1525 flow [2024-06-27 20:51:48,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1525, PETRI_PLACES=258, PETRI_TRANSITIONS=173} [2024-06-27 20:51:48,688 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 228 predicate places. [2024-06-27 20:51:48,688 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 173 transitions, 1525 flow [2024-06-27 20:51:48,689 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) [2024-06-27 20:51:48,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:48,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:48,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-27 20:51:48,689 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:48,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:48,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1569113750, now seen corresponding path program 30 times [2024-06-27 20:51:48,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:48,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036469851] [2024-06-27 20:51:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:48,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:50,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:50,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036469851] [2024-06-27 20:51:50,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036469851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:50,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:50,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:50,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033412674] [2024-06-27 20:51:50,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:50,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:50,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:50,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:50,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:50,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:50,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 173 transitions, 1525 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:50,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:50,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:50,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:50,691 INFO L124 PetriNetUnfolderBase]: 581/1205 cut-off events. [2024-06-27 20:51:50,691 INFO L125 PetriNetUnfolderBase]: For 247541/247541 co-relation queries the response was YES. [2024-06-27 20:51:50,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9938 conditions, 1205 events. 581/1205 cut-off events. For 247541/247541 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7116 event pairs, 224 based on Foata normal form. 2/1205 useless extension candidates. Maximal degree in co-relation 9828. Up to 1070 conditions per place. [2024-06-27 20:51:50,703 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 156 selfloop transitions, 31 changer transitions 0/189 dead transitions. [2024-06-27 20:51:50,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 189 transitions, 1981 flow [2024-06-27 20:51:50,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:50,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-27 20:51:50,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-27 20:51:50,704 INFO L175 Difference]: Start difference. First operand has 258 places, 173 transitions, 1525 flow. Second operand 11 states and 124 transitions. [2024-06-27 20:51:50,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 189 transitions, 1981 flow [2024-06-27 20:51:51,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 189 transitions, 1921 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 20:51:51,328 INFO L231 Difference]: Finished difference. Result has 257 places, 174 transitions, 1575 flow [2024-06-27 20:51:51,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1575, PETRI_PLACES=257, PETRI_TRANSITIONS=174} [2024-06-27 20:51:51,328 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 227 predicate places. [2024-06-27 20:51:51,329 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 174 transitions, 1575 flow [2024-06-27 20:51:51,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:51,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:51,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:51,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-27 20:51:51,329 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:51,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:51,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1562627000, now seen corresponding path program 31 times [2024-06-27 20:51:51,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:51,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324616468] [2024-06-27 20:51:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:51,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:52,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:52,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324616468] [2024-06-27 20:51:52,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324616468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:52,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:52,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:51:52,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539871705] [2024-06-27 20:51:52,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:52,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:51:52,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:52,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:51:52,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:51:52,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:52,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 174 transitions, 1575 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) [2024-06-27 20:51:52,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:52,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:52,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:53,080 INFO L124 PetriNetUnfolderBase]: 594/1236 cut-off events. [2024-06-27 20:51:53,080 INFO L125 PetriNetUnfolderBase]: For 274536/274536 co-relation queries the response was YES. [2024-06-27 20:51:53,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9795 conditions, 1236 events. 594/1236 cut-off events. For 274536/274536 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7372 event pairs, 225 based on Foata normal form. 12/1246 useless extension candidates. Maximal degree in co-relation 9686. Up to 1034 conditions per place. [2024-06-27 20:51:53,092 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 152 selfloop transitions, 33 changer transitions 8/195 dead transitions. [2024-06-27 20:51:53,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 195 transitions, 2077 flow [2024-06-27 20:51:53,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:53,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-27 20:51:53,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-27 20:51:53,093 INFO L175 Difference]: Start difference. First operand has 257 places, 174 transitions, 1575 flow. Second operand 11 states and 131 transitions. [2024-06-27 20:51:53,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 195 transitions, 2077 flow [2024-06-27 20:51:53,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 195 transitions, 1977 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 20:51:53,663 INFO L231 Difference]: Finished difference. Result has 259 places, 171 transitions, 1560 flow [2024-06-27 20:51:53,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1560, PETRI_PLACES=259, PETRI_TRANSITIONS=171} [2024-06-27 20:51:53,664 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 229 predicate places. [2024-06-27 20:51:53,664 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 171 transitions, 1560 flow [2024-06-27 20:51:53,664 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) [2024-06-27 20:51:53,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:53,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:53,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-27 20:51:53,664 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:53,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:53,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1562620056, now seen corresponding path program 38 times [2024-06-27 20:51:53,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:53,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844580294] [2024-06-27 20:51:53,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:53,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:55,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:55,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844580294] [2024-06-27 20:51:55,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844580294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:55,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:55,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:55,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468379454] [2024-06-27 20:51:55,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:55,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:55,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:55,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:55,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:55,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:55,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 171 transitions, 1560 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:55,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:55,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:55,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:56,367 INFO L124 PetriNetUnfolderBase]: 585/1221 cut-off events. [2024-06-27 20:51:56,367 INFO L125 PetriNetUnfolderBase]: For 271562/271562 co-relation queries the response was YES. [2024-06-27 20:51:56,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9718 conditions, 1221 events. 585/1221 cut-off events. For 271562/271562 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7237 event pairs, 227 based on Foata normal form. 10/1229 useless extension candidates. Maximal degree in co-relation 9608. Up to 1032 conditions per place. [2024-06-27 20:51:56,379 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 149 selfloop transitions, 25 changer transitions 17/193 dead transitions. [2024-06-27 20:51:56,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 193 transitions, 2020 flow [2024-06-27 20:51:56,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:51:56,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:51:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-27 20:51:56,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-27 20:51:56,380 INFO L175 Difference]: Start difference. First operand has 259 places, 171 transitions, 1560 flow. Second operand 12 states and 139 transitions. [2024-06-27 20:51:56,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 193 transitions, 2020 flow [2024-06-27 20:51:57,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 193 transitions, 1905 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-27 20:51:57,049 INFO L231 Difference]: Finished difference. Result has 259 places, 164 transitions, 1446 flow [2024-06-27 20:51:57,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1446, PETRI_PLACES=259, PETRI_TRANSITIONS=164} [2024-06-27 20:51:57,049 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 229 predicate places. [2024-06-27 20:51:57,049 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 164 transitions, 1446 flow [2024-06-27 20:51:57,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:57,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:57,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:57,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-27 20:51:57,050 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:57,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:57,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1568876166, now seen corresponding path program 39 times [2024-06-27 20:51:57,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:57,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755916723] [2024-06-27 20:51:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:57,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:58,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:58,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755916723] [2024-06-27 20:51:58,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755916723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:58,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:58,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:51:58,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250421299] [2024-06-27 20:51:58,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:58,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:51:58,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:58,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:51:58,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:51:58,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:51:58,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 164 transitions, 1446 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:58,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:58,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:51:58,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:59,312 INFO L124 PetriNetUnfolderBase]: 552/1162 cut-off events. [2024-06-27 20:51:59,312 INFO L125 PetriNetUnfolderBase]: For 259396/259396 co-relation queries the response was YES. [2024-06-27 20:51:59,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9073 conditions, 1162 events. 552/1162 cut-off events. For 259396/259396 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6847 event pairs, 219 based on Foata normal form. 10/1170 useless extension candidates. Maximal degree in co-relation 8962. Up to 986 conditions per place. [2024-06-27 20:51:59,321 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 148 selfloop transitions, 26 changer transitions 9/185 dead transitions. [2024-06-27 20:51:59,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 185 transitions, 1886 flow [2024-06-27 20:51:59,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:51:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:51:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-27 20:51:59,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-27 20:51:59,322 INFO L175 Difference]: Start difference. First operand has 259 places, 164 transitions, 1446 flow. Second operand 12 states and 135 transitions. [2024-06-27 20:51:59,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 185 transitions, 1886 flow [2024-06-27 20:51:59,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 185 transitions, 1824 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-27 20:51:59,907 INFO L231 Difference]: Finished difference. Result has 251 places, 161 transitions, 1416 flow [2024-06-27 20:51:59,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1416, PETRI_PLACES=251, PETRI_TRANSITIONS=161} [2024-06-27 20:51:59,908 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 221 predicate places. [2024-06-27 20:51:59,908 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 161 transitions, 1416 flow [2024-06-27 20:51:59,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:59,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:59,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:59,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-27 20:51:59,909 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:51:59,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:59,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1569122120, now seen corresponding path program 32 times [2024-06-27 20:51:59,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:59,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908655109] [2024-06-27 20:51:59,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:59,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:02,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:02,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908655109] [2024-06-27 20:52:02,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908655109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:02,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:02,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:52:02,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145156713] [2024-06-27 20:52:02,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:02,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:52:02,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:02,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:52:02,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:52:02,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:02,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 161 transitions, 1416 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:02,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:02,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:02,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:02,685 INFO L124 PetriNetUnfolderBase]: 523/1107 cut-off events. [2024-06-27 20:52:02,685 INFO L125 PetriNetUnfolderBase]: For 198663/198663 co-relation queries the response was YES. [2024-06-27 20:52:02,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8449 conditions, 1107 events. 523/1107 cut-off events. For 198663/198663 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6455 event pairs, 214 based on Foata normal form. 2/1107 useless extension candidates. Maximal degree in co-relation 8342. Up to 967 conditions per place. [2024-06-27 20:52:02,696 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 147 selfloop transitions, 27 changer transitions 0/176 dead transitions. [2024-06-27 20:52:02,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 176 transitions, 1802 flow [2024-06-27 20:52:02,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:52:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:52:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-27 20:52:02,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:52:02,697 INFO L175 Difference]: Start difference. First operand has 251 places, 161 transitions, 1416 flow. Second operand 11 states and 121 transitions. [2024-06-27 20:52:02,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 176 transitions, 1802 flow [2024-06-27 20:52:03,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 176 transitions, 1744 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-27 20:52:03,217 INFO L231 Difference]: Finished difference. Result has 248 places, 161 transitions, 1416 flow [2024-06-27 20:52:03,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1416, PETRI_PLACES=248, PETRI_TRANSITIONS=161} [2024-06-27 20:52:03,218 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2024-06-27 20:52:03,218 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 161 transitions, 1416 flow [2024-06-27 20:52:03,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:03,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:03,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:03,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-27 20:52:03,218 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:03,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:03,218 INFO L85 PathProgramCache]: Analyzing trace with hash 377889158, now seen corresponding path program 40 times [2024-06-27 20:52:03,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:03,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713093853] [2024-06-27 20:52:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:03,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:04,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:04,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713093853] [2024-06-27 20:52:04,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713093853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:04,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:04,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:52:04,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550456599] [2024-06-27 20:52:04,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:04,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:52:04,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:04,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:52:04,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:52:04,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:04,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 161 transitions, 1416 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:04,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:04,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:04,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:05,705 INFO L124 PetriNetUnfolderBase]: 544/1154 cut-off events. [2024-06-27 20:52:05,705 INFO L125 PetriNetUnfolderBase]: For 208826/208826 co-relation queries the response was YES. [2024-06-27 20:52:05,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8374 conditions, 1154 events. 544/1154 cut-off events. For 208826/208826 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6815 event pairs, 146 based on Foata normal form. 8/1160 useless extension candidates. Maximal degree in co-relation 8268. Up to 590 conditions per place. [2024-06-27 20:52:05,716 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 132 selfloop transitions, 74 changer transitions 9/217 dead transitions. [2024-06-27 20:52:05,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 217 transitions, 2252 flow [2024-06-27 20:52:05,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 20:52:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 20:52:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 181 transitions. [2024-06-27 20:52:05,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3649193548387097 [2024-06-27 20:52:05,717 INFO L175 Difference]: Start difference. First operand has 248 places, 161 transitions, 1416 flow. Second operand 16 states and 181 transitions. [2024-06-27 20:52:05,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 217 transitions, 2252 flow [2024-06-27 20:52:06,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 217 transitions, 2008 flow, removed 22 selfloop flow, removed 14 redundant places. [2024-06-27 20:52:06,160 INFO L231 Difference]: Finished difference. Result has 254 places, 166 transitions, 1403 flow [2024-06-27 20:52:06,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1403, PETRI_PLACES=254, PETRI_TRANSITIONS=166} [2024-06-27 20:52:06,160 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2024-06-27 20:52:06,160 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 166 transitions, 1403 flow [2024-06-27 20:52:06,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:06,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:06,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:06,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-27 20:52:06,161 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:06,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:06,161 INFO L85 PathProgramCache]: Analyzing trace with hash -317604212, now seen corresponding path program 1 times [2024-06-27 20:52:06,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:06,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445401624] [2024-06-27 20:52:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:06,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:07,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:07,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445401624] [2024-06-27 20:52:07,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445401624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:07,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:07,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:52:07,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576669232] [2024-06-27 20:52:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:07,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:52:07,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:07,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:52:07,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:52:07,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:07,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 166 transitions, 1403 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) [2024-06-27 20:52:07,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:07,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:07,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:07,987 INFO L124 PetriNetUnfolderBase]: 518/1099 cut-off events. [2024-06-27 20:52:07,987 INFO L125 PetriNetUnfolderBase]: For 182445/182445 co-relation queries the response was YES. [2024-06-27 20:52:07,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7505 conditions, 1099 events. 518/1099 cut-off events. For 182445/182445 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6416 event pairs, 171 based on Foata normal form. 6/1103 useless extension candidates. Maximal degree in co-relation 7398. Up to 994 conditions per place. [2024-06-27 20:52:07,995 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 150 selfloop transitions, 12 changer transitions 21/185 dead transitions. [2024-06-27 20:52:07,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 185 transitions, 1829 flow [2024-06-27 20:52:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:52:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:52:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-27 20:52:07,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-27 20:52:07,996 INFO L175 Difference]: Start difference. First operand has 254 places, 166 transitions, 1403 flow. Second operand 11 states and 118 transitions. [2024-06-27 20:52:07,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 185 transitions, 1829 flow [2024-06-27 20:52:08,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 185 transitions, 1621 flow, removed 33 selfloop flow, removed 14 redundant places. [2024-06-27 20:52:08,357 INFO L231 Difference]: Finished difference. Result has 246 places, 157 transitions, 1165 flow [2024-06-27 20:52:08,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1165, PETRI_PLACES=246, PETRI_TRANSITIONS=157} [2024-06-27 20:52:08,357 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 216 predicate places. [2024-06-27 20:52:08,358 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 157 transitions, 1165 flow [2024-06-27 20:52:08,358 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) [2024-06-27 20:52:08,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:08,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:08,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-27 20:52:08,358 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:08,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:08,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1956656952, now seen corresponding path program 2 times [2024-06-27 20:52:08,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:08,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031140493] [2024-06-27 20:52:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:08,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:09,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:09,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031140493] [2024-06-27 20:52:09,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031140493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:09,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:09,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:52:09,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990077931] [2024-06-27 20:52:09,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:09,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:52:09,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:09,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:52:09,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:52:10,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:10,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 157 transitions, 1165 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:10,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:10,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:10,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:10,488 INFO L124 PetriNetUnfolderBase]: 504/1069 cut-off events. [2024-06-27 20:52:10,488 INFO L125 PetriNetUnfolderBase]: For 196773/196773 co-relation queries the response was YES. [2024-06-27 20:52:10,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6962 conditions, 1069 events. 504/1069 cut-off events. For 196773/196773 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6202 event pairs, 138 based on Foata normal form. 12/1079 useless extension candidates. Maximal degree in co-relation 6863. Up to 624 conditions per place. [2024-06-27 20:52:10,497 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 102 selfloop transitions, 60 changer transitions 14/178 dead transitions. [2024-06-27 20:52:10,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 178 transitions, 1577 flow [2024-06-27 20:52:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:10,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-27 20:52:10,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-27 20:52:10,497 INFO L175 Difference]: Start difference. First operand has 246 places, 157 transitions, 1165 flow. Second operand 12 states and 137 transitions. [2024-06-27 20:52:10,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 178 transitions, 1577 flow [2024-06-27 20:52:10,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 178 transitions, 1535 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 20:52:10,802 INFO L231 Difference]: Finished difference. Result has 236 places, 151 transitions, 1210 flow [2024-06-27 20:52:10,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1210, PETRI_PLACES=236, PETRI_TRANSITIONS=151} [2024-06-27 20:52:10,803 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 206 predicate places. [2024-06-27 20:52:10,803 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 151 transitions, 1210 flow [2024-06-27 20:52:10,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:10,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:10,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:10,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-27 20:52:10,803 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:10,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:10,803 INFO L85 PathProgramCache]: Analyzing trace with hash -427079834, now seen corresponding path program 3 times [2024-06-27 20:52:10,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:10,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617805283] [2024-06-27 20:52:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:10,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:13,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:13,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617805283] [2024-06-27 20:52:13,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617805283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:13,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:13,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:52:13,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271849519] [2024-06-27 20:52:13,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:13,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:52:13,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:13,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:52:13,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:52:13,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:13,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 151 transitions, 1210 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:13,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:13,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:13,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:13,762 INFO L124 PetriNetUnfolderBase]: 471/998 cut-off events. [2024-06-27 20:52:13,763 INFO L125 PetriNetUnfolderBase]: For 161800/161800 co-relation queries the response was YES. [2024-06-27 20:52:13,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6114 conditions, 998 events. 471/998 cut-off events. For 161800/161800 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5652 event pairs, 124 based on Foata normal form. 12/1008 useless extension candidates. Maximal degree in co-relation 6019. Up to 580 conditions per place. [2024-06-27 20:52:13,771 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 101 selfloop transitions, 56 changer transitions 13/172 dead transitions. [2024-06-27 20:52:13,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 172 transitions, 1606 flow [2024-06-27 20:52:13,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:13,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-27 20:52:13,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2024-06-27 20:52:13,772 INFO L175 Difference]: Start difference. First operand has 236 places, 151 transitions, 1210 flow. Second operand 12 states and 133 transitions. [2024-06-27 20:52:13,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 172 transitions, 1606 flow [2024-06-27 20:52:13,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 172 transitions, 1478 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 20:52:13,991 INFO L231 Difference]: Finished difference. Result has 230 places, 146 transitions, 1163 flow [2024-06-27 20:52:13,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1163, PETRI_PLACES=230, PETRI_TRANSITIONS=146} [2024-06-27 20:52:13,991 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 200 predicate places. [2024-06-27 20:52:13,991 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 146 transitions, 1163 flow [2024-06-27 20:52:13,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:13,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:13,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:13,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-27 20:52:13,992 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:13,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:13,992 INFO L85 PathProgramCache]: Analyzing trace with hash -592566938, now seen corresponding path program 4 times [2024-06-27 20:52:13,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:13,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99854936] [2024-06-27 20:52:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:13,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:16,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:16,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99854936] [2024-06-27 20:52:16,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99854936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:16,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:16,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:52:16,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048635410] [2024-06-27 20:52:16,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:16,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:52:16,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:52:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:52:16,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:16,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 146 transitions, 1163 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:16,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:16,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:16,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:16,931 INFO L124 PetriNetUnfolderBase]: 443/942 cut-off events. [2024-06-27 20:52:16,932 INFO L125 PetriNetUnfolderBase]: For 131603/131603 co-relation queries the response was YES. [2024-06-27 20:52:16,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5835 conditions, 942 events. 443/942 cut-off events. For 131603/131603 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5244 event pairs, 121 based on Foata normal form. 6/946 useless extension candidates. Maximal degree in co-relation 5743. Up to 543 conditions per place. [2024-06-27 20:52:16,939 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 97 selfloop transitions, 54 changer transitions 13/166 dead transitions. [2024-06-27 20:52:16,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 166 transitions, 1541 flow [2024-06-27 20:52:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-27 20:52:16,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-27 20:52:16,940 INFO L175 Difference]: Start difference. First operand has 230 places, 146 transitions, 1163 flow. Second operand 12 states and 134 transitions. [2024-06-27 20:52:16,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 166 transitions, 1541 flow [2024-06-27 20:52:17,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 166 transitions, 1423 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 20:52:17,150 INFO L231 Difference]: Finished difference. Result has 224 places, 139 transitions, 1110 flow [2024-06-27 20:52:17,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1110, PETRI_PLACES=224, PETRI_TRANSITIONS=139} [2024-06-27 20:52:17,150 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2024-06-27 20:52:17,150 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 139 transitions, 1110 flow [2024-06-27 20:52:17,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:17,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:17,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:17,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-27 20:52:17,151 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:17,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1652195542, now seen corresponding path program 5 times [2024-06-27 20:52:17,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:17,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489189343] [2024-06-27 20:52:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:17,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:19,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:19,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489189343] [2024-06-27 20:52:19,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489189343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:19,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:19,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:52:19,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077284967] [2024-06-27 20:52:19,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:19,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:52:19,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:19,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:52:19,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:52:19,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:19,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 139 transitions, 1110 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:19,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:19,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:19,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:19,587 INFO L124 PetriNetUnfolderBase]: 410/871 cut-off events. [2024-06-27 20:52:19,587 INFO L125 PetriNetUnfolderBase]: For 107258/107258 co-relation queries the response was YES. [2024-06-27 20:52:19,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5103 conditions, 871 events. 410/871 cut-off events. For 107258/107258 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4743 event pairs, 110 based on Foata normal form. 6/875 useless extension candidates. Maximal degree in co-relation 5013. Up to 506 conditions per place. [2024-06-27 20:52:19,593 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 87 selfloop transitions, 43 changer transitions 26/158 dead transitions. [2024-06-27 20:52:19,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 158 transitions, 1470 flow [2024-06-27 20:52:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:19,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-27 20:52:19,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-27 20:52:19,593 INFO L175 Difference]: Start difference. First operand has 224 places, 139 transitions, 1110 flow. Second operand 12 states and 131 transitions. [2024-06-27 20:52:19,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 158 transitions, 1470 flow [2024-06-27 20:52:19,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 158 transitions, 1352 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-06-27 20:52:19,738 INFO L231 Difference]: Finished difference. Result has 216 places, 126 transitions, 990 flow [2024-06-27 20:52:19,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=990, PETRI_PLACES=216, PETRI_TRANSITIONS=126} [2024-06-27 20:52:19,739 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2024-06-27 20:52:19,739 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 126 transitions, 990 flow [2024-06-27 20:52:19,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:19,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:19,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:19,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-27 20:52:19,739 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:19,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:19,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1155897768, now seen corresponding path program 6 times [2024-06-27 20:52:19,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:19,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750107977] [2024-06-27 20:52:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:19,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:21,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:21,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750107977] [2024-06-27 20:52:21,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750107977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:21,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:21,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:52:21,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416003079] [2024-06-27 20:52:21,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:21,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:52:21,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:21,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:52:21,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:52:22,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:22,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 126 transitions, 990 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:22,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:22,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:22,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:22,476 INFO L124 PetriNetUnfolderBase]: 394/834 cut-off events. [2024-06-27 20:52:22,476 INFO L125 PetriNetUnfolderBase]: For 112285/112285 co-relation queries the response was YES. [2024-06-27 20:52:22,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4794 conditions, 834 events. 394/834 cut-off events. For 112285/112285 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4521 event pairs, 102 based on Foata normal form. 12/844 useless extension candidates. Maximal degree in co-relation 4708. Up to 574 conditions per place. [2024-06-27 20:52:22,482 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 94 selfloop transitions, 37 changer transitions 14/147 dead transitions. [2024-06-27 20:52:22,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 147 transitions, 1338 flow [2024-06-27 20:52:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:22,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-27 20:52:22,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-27 20:52:22,482 INFO L175 Difference]: Start difference. First operand has 216 places, 126 transitions, 990 flow. Second operand 12 states and 138 transitions. [2024-06-27 20:52:22,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 147 transitions, 1338 flow [2024-06-27 20:52:22,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 147 transitions, 1206 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-27 20:52:22,608 INFO L231 Difference]: Finished difference. Result has 199 places, 120 transitions, 897 flow [2024-06-27 20:52:22,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=897, PETRI_PLACES=199, PETRI_TRANSITIONS=120} [2024-06-27 20:52:22,609 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-06-27 20:52:22,609 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 120 transitions, 897 flow [2024-06-27 20:52:22,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:22,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:22,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:22,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-27 20:52:22,609 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:22,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:22,609 INFO L85 PathProgramCache]: Analyzing trace with hash 536281514, now seen corresponding path program 7 times [2024-06-27 20:52:22,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:22,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140769520] [2024-06-27 20:52:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:22,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:24,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:24,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140769520] [2024-06-27 20:52:24,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140769520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:24,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:24,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:52:24,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012130310] [2024-06-27 20:52:24,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:24,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:52:24,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:24,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:52:24,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:52:24,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:24,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 120 transitions, 897 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) [2024-06-27 20:52:24,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:24,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:24,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:24,513 INFO L124 PetriNetUnfolderBase]: 376/796 cut-off events. [2024-06-27 20:52:24,513 INFO L125 PetriNetUnfolderBase]: For 97309/97309 co-relation queries the response was YES. [2024-06-27 20:52:24,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4478 conditions, 796 events. 376/796 cut-off events. For 97309/97309 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4234 event pairs, 103 based on Foata normal form. 12/806 useless extension candidates. Maximal degree in co-relation 4398. Up to 603 conditions per place. [2024-06-27 20:52:24,518 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 95 selfloop transitions, 29 changer transitions 14/140 dead transitions. [2024-06-27 20:52:24,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 140 transitions, 1227 flow [2024-06-27 20:52:24,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:24,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:24,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-27 20:52:24,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:52:24,519 INFO L175 Difference]: Start difference. First operand has 199 places, 120 transitions, 897 flow. Second operand 12 states and 132 transitions. [2024-06-27 20:52:24,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 140 transitions, 1227 flow [2024-06-27 20:52:24,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 140 transitions, 1145 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 20:52:24,626 INFO L231 Difference]: Finished difference. Result has 193 places, 114 transitions, 834 flow [2024-06-27 20:52:24,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=834, PETRI_PLACES=193, PETRI_TRANSITIONS=114} [2024-06-27 20:52:24,626 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 163 predicate places. [2024-06-27 20:52:24,627 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 114 transitions, 834 flow [2024-06-27 20:52:24,627 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) [2024-06-27 20:52:24,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:24,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:24,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-27 20:52:24,627 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:24,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:24,627 INFO L85 PathProgramCache]: Analyzing trace with hash -954808518, now seen corresponding path program 8 times [2024-06-27 20:52:24,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:24,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656836872] [2024-06-27 20:52:24,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:24,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:26,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:26,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656836872] [2024-06-27 20:52:26,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656836872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:26,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:26,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:52:26,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193889662] [2024-06-27 20:52:26,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:26,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:52:26,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:26,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:52:26,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:52:26,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:26,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 114 transitions, 834 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:26,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:26,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:26,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:26,694 INFO L124 PetriNetUnfolderBase]: 358/758 cut-off events. [2024-06-27 20:52:26,694 INFO L125 PetriNetUnfolderBase]: For 88855/88855 co-relation queries the response was YES. [2024-06-27 20:52:26,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4249 conditions, 758 events. 358/758 cut-off events. For 88855/88855 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3977 event pairs, 101 based on Foata normal form. 12/768 useless extension candidates. Maximal degree in co-relation 4172. Up to 543 conditions per place. [2024-06-27 20:52:26,699 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 89 selfloop transitions, 30 changer transitions 13/134 dead transitions. [2024-06-27 20:52:26,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 134 transitions, 1152 flow [2024-06-27 20:52:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:26,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-27 20:52:26,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2024-06-27 20:52:26,700 INFO L175 Difference]: Start difference. First operand has 193 places, 114 transitions, 834 flow. Second operand 12 states and 133 transitions. [2024-06-27 20:52:26,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 134 transitions, 1152 flow [2024-06-27 20:52:26,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 134 transitions, 1082 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-27 20:52:26,820 INFO L231 Difference]: Finished difference. Result has 186 places, 109 transitions, 795 flow [2024-06-27 20:52:26,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=795, PETRI_PLACES=186, PETRI_TRANSITIONS=109} [2024-06-27 20:52:26,821 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2024-06-27 20:52:26,821 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 109 transitions, 795 flow [2024-06-27 20:52:26,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:26,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:26,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:26,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-27 20:52:26,821 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:26,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:26,821 INFO L85 PathProgramCache]: Analyzing trace with hash 730220924, now seen corresponding path program 9 times [2024-06-27 20:52:26,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:26,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218813375] [2024-06-27 20:52:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:26,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:28,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:28,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218813375] [2024-06-27 20:52:28,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218813375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:28,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:28,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:52:28,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080011405] [2024-06-27 20:52:28,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:28,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:52:28,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:52:28,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:52:28,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:28,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 109 transitions, 795 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) [2024-06-27 20:52:28,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:28,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:28,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:28,640 INFO L124 PetriNetUnfolderBase]: 323/689 cut-off events. [2024-06-27 20:52:28,640 INFO L125 PetriNetUnfolderBase]: For 69347/69347 co-relation queries the response was YES. [2024-06-27 20:52:28,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3593 conditions, 689 events. 323/689 cut-off events. For 69347/69347 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3535 event pairs, 96 based on Foata normal form. 12/699 useless extension candidates. Maximal degree in co-relation 3520. Up to 514 conditions per place. [2024-06-27 20:52:28,644 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 88 selfloop transitions, 26 changer transitions 11/127 dead transitions. [2024-06-27 20:52:28,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 127 transitions, 1095 flow [2024-06-27 20:52:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:52:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:52:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-27 20:52:28,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-27 20:52:28,645 INFO L175 Difference]: Start difference. First operand has 186 places, 109 transitions, 795 flow. Second operand 11 states and 123 transitions. [2024-06-27 20:52:28,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 127 transitions, 1095 flow [2024-06-27 20:52:28,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 127 transitions, 1029 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 20:52:28,739 INFO L231 Difference]: Finished difference. Result has 181 places, 104 transitions, 752 flow [2024-06-27 20:52:28,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=752, PETRI_PLACES=181, PETRI_TRANSITIONS=104} [2024-06-27 20:52:28,739 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2024-06-27 20:52:28,739 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 104 transitions, 752 flow [2024-06-27 20:52:28,739 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) [2024-06-27 20:52:28,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:28,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:28,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-27 20:52:28,740 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:28,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:28,740 INFO L85 PathProgramCache]: Analyzing trace with hash -954549048, now seen corresponding path program 10 times [2024-06-27 20:52:28,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:28,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418797592] [2024-06-27 20:52:28,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:28,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:30,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:30,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418797592] [2024-06-27 20:52:30,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418797592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:30,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:30,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:52:30,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394840307] [2024-06-27 20:52:30,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:30,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:52:30,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:30,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:52:30,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:52:30,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:30,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 104 transitions, 752 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:30,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:30,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:30,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:30,685 INFO L124 PetriNetUnfolderBase]: 295/633 cut-off events. [2024-06-27 20:52:30,685 INFO L125 PetriNetUnfolderBase]: For 54167/54167 co-relation queries the response was YES. [2024-06-27 20:52:30,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3377 conditions, 633 events. 295/633 cut-off events. For 54167/54167 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3167 event pairs, 82 based on Foata normal form. 6/637 useless extension candidates. Maximal degree in co-relation 3306. Up to 470 conditions per place. [2024-06-27 20:52:30,689 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 81 selfloop transitions, 21 changer transitions 20/124 dead transitions. [2024-06-27 20:52:30,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 124 transitions, 1048 flow [2024-06-27 20:52:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-27 20:52:30,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-27 20:52:30,690 INFO L175 Difference]: Start difference. First operand has 181 places, 104 transitions, 752 flow. Second operand 12 states and 131 transitions. [2024-06-27 20:52:30,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 124 transitions, 1048 flow [2024-06-27 20:52:30,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 124 transitions, 984 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-27 20:52:30,768 INFO L231 Difference]: Finished difference. Result has 175 places, 95 transitions, 675 flow [2024-06-27 20:52:30,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=675, PETRI_PLACES=175, PETRI_TRANSITIONS=95} [2024-06-27 20:52:30,769 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2024-06-27 20:52:30,769 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 95 transitions, 675 flow [2024-06-27 20:52:30,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:30,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:30,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:30,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-27 20:52:30,769 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:30,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:30,770 INFO L85 PathProgramCache]: Analyzing trace with hash -731957448, now seen corresponding path program 11 times [2024-06-27 20:52:30,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:30,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35301433] [2024-06-27 20:52:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:30,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:32,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:32,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35301433] [2024-06-27 20:52:32,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35301433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:32,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:32,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:52:32,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85762532] [2024-06-27 20:52:32,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:32,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:52:32,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:32,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:52:32,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:52:32,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:32,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 95 transitions, 675 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) [2024-06-27 20:52:32,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:32,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:32,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:32,822 INFO L124 PetriNetUnfolderBase]: 275/589 cut-off events. [2024-06-27 20:52:32,823 INFO L125 PetriNetUnfolderBase]: For 50603/50603 co-relation queries the response was YES. [2024-06-27 20:52:32,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3168 conditions, 589 events. 275/589 cut-off events. For 50603/50603 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2864 event pairs, 81 based on Foata normal form. 6/593 useless extension candidates. Maximal degree in co-relation 3100. Up to 459 conditions per place. [2024-06-27 20:52:32,826 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 74 selfloop transitions, 19 changer transitions 17/112 dead transitions. [2024-06-27 20:52:32,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 112 transitions, 939 flow [2024-06-27 20:52:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:52:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:52:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-27 20:52:32,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:52:32,827 INFO L175 Difference]: Start difference. First operand has 175 places, 95 transitions, 675 flow. Second operand 11 states and 121 transitions. [2024-06-27 20:52:32,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 112 transitions, 939 flow [2024-06-27 20:52:32,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 112 transitions, 885 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-27 20:52:32,886 INFO L231 Difference]: Finished difference. Result has 163 places, 88 transitions, 619 flow [2024-06-27 20:52:32,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=619, PETRI_PLACES=163, PETRI_TRANSITIONS=88} [2024-06-27 20:52:32,886 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-27 20:52:32,886 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 88 transitions, 619 flow [2024-06-27 20:52:32,886 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) [2024-06-27 20:52:32,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:32,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:32,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-27 20:52:32,887 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:32,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:32,887 INFO L85 PathProgramCache]: Analyzing trace with hash -909703642, now seen corresponding path program 12 times [2024-06-27 20:52:32,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:32,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071694144] [2024-06-27 20:52:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:32,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:35,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:35,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071694144] [2024-06-27 20:52:35,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071694144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:35,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:35,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:52:35,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602908262] [2024-06-27 20:52:35,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:35,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:52:35,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:35,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:52:35,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:52:35,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:35,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 88 transitions, 619 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:35,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:35,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:35,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:35,830 INFO L124 PetriNetUnfolderBase]: 251/541 cut-off events. [2024-06-27 20:52:35,831 INFO L125 PetriNetUnfolderBase]: For 42241/42241 co-relation queries the response was YES. [2024-06-27 20:52:35,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2887 conditions, 541 events. 251/541 cut-off events. For 42241/42241 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2548 event pairs, 79 based on Foata normal form. 6/545 useless extension candidates. Maximal degree in co-relation 2824. Up to 421 conditions per place. [2024-06-27 20:52:35,834 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 64 selfloop transitions, 11 changer transitions 29/106 dead transitions. [2024-06-27 20:52:35,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 106 transitions, 871 flow [2024-06-27 20:52:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:35,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 127 transitions. [2024-06-27 20:52:35,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34139784946236557 [2024-06-27 20:52:35,835 INFO L175 Difference]: Start difference. First operand has 163 places, 88 transitions, 619 flow. Second operand 12 states and 127 transitions. [2024-06-27 20:52:35,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 106 transitions, 871 flow [2024-06-27 20:52:35,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 106 transitions, 827 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 20:52:35,893 INFO L231 Difference]: Finished difference. Result has 158 places, 74 transitions, 510 flow [2024-06-27 20:52:35,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=510, PETRI_PLACES=158, PETRI_TRANSITIONS=74} [2024-06-27 20:52:35,894 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-06-27 20:52:35,894 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 74 transitions, 510 flow [2024-06-27 20:52:35,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:35,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:35,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:35,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-27 20:52:35,895 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:35,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:35,895 INFO L85 PathProgramCache]: Analyzing trace with hash -132764310, now seen corresponding path program 13 times [2024-06-27 20:52:35,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:35,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620773159] [2024-06-27 20:52:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:35,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:37,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:37,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620773159] [2024-06-27 20:52:37,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620773159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:37,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:37,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:52:37,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974465250] [2024-06-27 20:52:37,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:37,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:52:37,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:52:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:52:37,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:37,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 74 transitions, 510 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) [2024-06-27 20:52:37,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:37,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:37,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:37,593 INFO L124 PetriNetUnfolderBase]: 226/479 cut-off events. [2024-06-27 20:52:37,593 INFO L125 PetriNetUnfolderBase]: For 39052/39052 co-relation queries the response was YES. [2024-06-27 20:52:37,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2619 conditions, 479 events. 226/479 cut-off events. For 39052/39052 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2187 event pairs, 76 based on Foata normal form. 6/484 useless extension candidates. Maximal degree in co-relation 2558. Up to 402 conditions per place. [2024-06-27 20:52:37,596 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 61 selfloop transitions, 8 changer transitions 17/88 dead transitions. [2024-06-27 20:52:37,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 88 transitions, 714 flow [2024-06-27 20:52:37,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:52:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:52:37,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-27 20:52:37,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284457478005865 [2024-06-27 20:52:37,597 INFO L175 Difference]: Start difference. First operand has 158 places, 74 transitions, 510 flow. Second operand 11 states and 112 transitions. [2024-06-27 20:52:37,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 88 transitions, 714 flow [2024-06-27 20:52:37,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 88 transitions, 642 flow, removed 8 selfloop flow, removed 17 redundant places. [2024-06-27 20:52:37,649 INFO L231 Difference]: Finished difference. Result has 134 places, 67 transitions, 413 flow [2024-06-27 20:52:37,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=413, PETRI_PLACES=134, PETRI_TRANSITIONS=67} [2024-06-27 20:52:37,649 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2024-06-27 20:52:37,649 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 67 transitions, 413 flow [2024-06-27 20:52:37,649 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) [2024-06-27 20:52:37,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:37,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:37,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-27 20:52:37,650 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:37,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:37,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2104230668, now seen corresponding path program 14 times [2024-06-27 20:52:37,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:37,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370373791] [2024-06-27 20:52:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:37,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:39,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:39,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370373791] [2024-06-27 20:52:39,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370373791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:39,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:39,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:52:39,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213933068] [2024-06-27 20:52:39,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:39,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:52:39,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:39,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:52:39,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:52:39,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:39,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 67 transitions, 413 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:39,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:39,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:39,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:39,490 INFO L124 PetriNetUnfolderBase]: 207/442 cut-off events. [2024-06-27 20:52:39,490 INFO L125 PetriNetUnfolderBase]: For 28940/28940 co-relation queries the response was YES. [2024-06-27 20:52:39,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 442 events. 207/442 cut-off events. For 28940/28940 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1968 event pairs, 70 based on Foata normal form. 6/447 useless extension candidates. Maximal degree in co-relation 2248. Up to 368 conditions per place. [2024-06-27 20:52:39,493 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 55 selfloop transitions, 6 changer transitions 18/81 dead transitions. [2024-06-27 20:52:39,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 81 transitions, 601 flow [2024-06-27 20:52:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:52:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:52:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-06-27 20:52:39,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-27 20:52:39,493 INFO L175 Difference]: Start difference. First operand has 134 places, 67 transitions, 413 flow. Second operand 11 states and 110 transitions. [2024-06-27 20:52:39,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 81 transitions, 601 flow [2024-06-27 20:52:39,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 81 transitions, 566 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-27 20:52:39,518 INFO L231 Difference]: Finished difference. Result has 124 places, 60 transitions, 362 flow [2024-06-27 20:52:39,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=362, PETRI_PLACES=124, PETRI_TRANSITIONS=60} [2024-06-27 20:52:39,518 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 94 predicate places. [2024-06-27 20:52:39,518 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 60 transitions, 362 flow [2024-06-27 20:52:39,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:39,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:39,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:39,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-27 20:52:39,519 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:39,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:39,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2071318186, now seen corresponding path program 15 times [2024-06-27 20:52:39,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:39,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369826016] [2024-06-27 20:52:39,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:39,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:41,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:41,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369826016] [2024-06-27 20:52:41,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369826016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:41,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:41,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:52:41,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441075824] [2024-06-27 20:52:41,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:41,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:52:41,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:41,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:52:41,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:52:41,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:41,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 60 transitions, 362 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:41,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:41,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:41,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:42,005 INFO L124 PetriNetUnfolderBase]: 187/402 cut-off events. [2024-06-27 20:52:42,005 INFO L125 PetriNetUnfolderBase]: For 23878/23878 co-relation queries the response was YES. [2024-06-27 20:52:42,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2081 conditions, 402 events. 187/402 cut-off events. For 23878/23878 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1758 event pairs, 64 based on Foata normal form. 6/407 useless extension candidates. Maximal degree in co-relation 2032. Up to 307 conditions per place. [2024-06-27 20:52:42,007 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 50 selfloop transitions, 14 changer transitions 11/77 dead transitions. [2024-06-27 20:52:42,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 77 transitions, 556 flow [2024-06-27 20:52:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 121 transitions. [2024-06-27 20:52:42,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32526881720430106 [2024-06-27 20:52:42,008 INFO L175 Difference]: Start difference. First operand has 124 places, 60 transitions, 362 flow. Second operand 12 states and 121 transitions. [2024-06-27 20:52:42,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 77 transitions, 556 flow [2024-06-27 20:52:42,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 77 transitions, 519 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-27 20:52:42,025 INFO L231 Difference]: Finished difference. Result has 114 places, 57 transitions, 349 flow [2024-06-27 20:52:42,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=349, PETRI_PLACES=114, PETRI_TRANSITIONS=57} [2024-06-27 20:52:42,026 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2024-06-27 20:52:42,026 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 57 transitions, 349 flow [2024-06-27 20:52:42,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:42,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:42,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:42,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-27 20:52:42,026 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:42,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:42,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1212051076, now seen corresponding path program 16 times [2024-06-27 20:52:42,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:42,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275395003] [2024-06-27 20:52:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:42,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:43,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:43,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275395003] [2024-06-27 20:52:43,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275395003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:43,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:43,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:52:43,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622990952] [2024-06-27 20:52:43,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:43,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:52:43,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:43,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:52:43,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:52:43,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:43,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 57 transitions, 349 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) [2024-06-27 20:52:43,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:43,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:43,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:43,849 INFO L124 PetriNetUnfolderBase]: 177/384 cut-off events. [2024-06-27 20:52:43,849 INFO L125 PetriNetUnfolderBase]: For 19344/19344 co-relation queries the response was YES. [2024-06-27 20:52:43,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 384 events. 177/384 cut-off events. For 19344/19344 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1640 event pairs, 68 based on Foata normal form. 6/389 useless extension candidates. Maximal degree in co-relation 1876. Up to 299 conditions per place. [2024-06-27 20:52:43,850 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 46 selfloop transitions, 14 changer transitions 9/71 dead transitions. [2024-06-27 20:52:43,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 71 transitions, 517 flow [2024-06-27 20:52:43,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:52:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:52:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 111 transitions. [2024-06-27 20:52:43,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3255131964809384 [2024-06-27 20:52:43,851 INFO L175 Difference]: Start difference. First operand has 114 places, 57 transitions, 349 flow. Second operand 11 states and 111 transitions. [2024-06-27 20:52:43,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 71 transitions, 517 flow [2024-06-27 20:52:43,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 71 transitions, 483 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 20:52:43,865 INFO L231 Difference]: Finished difference. Result has 109 places, 54 transitions, 330 flow [2024-06-27 20:52:43,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=330, PETRI_PLACES=109, PETRI_TRANSITIONS=54} [2024-06-27 20:52:43,865 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2024-06-27 20:52:43,866 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 54 transitions, 330 flow [2024-06-27 20:52:43,866 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) [2024-06-27 20:52:43,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:43,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:43,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-27 20:52:43,866 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:43,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:43,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1870228936, now seen corresponding path program 17 times [2024-06-27 20:52:43,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:43,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422702798] [2024-06-27 20:52:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:43,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:45,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:45,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422702798] [2024-06-27 20:52:45,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422702798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:45,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:45,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:52:45,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657660635] [2024-06-27 20:52:45,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:45,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:52:45,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:45,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:52:45,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:52:45,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:45,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 54 transitions, 330 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:45,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:45,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:45,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:46,090 INFO L124 PetriNetUnfolderBase]: 167/366 cut-off events. [2024-06-27 20:52:46,090 INFO L125 PetriNetUnfolderBase]: For 17250/17250 co-relation queries the response was YES. [2024-06-27 20:52:46,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 366 events. 167/366 cut-off events. For 17250/17250 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1543 event pairs, 62 based on Foata normal form. 6/371 useless extension candidates. Maximal degree in co-relation 1776. Up to 279 conditions per place. [2024-06-27 20:52:46,092 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 45 selfloop transitions, 12 changer transitions 12/71 dead transitions. [2024-06-27 20:52:46,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 71 transitions, 504 flow [2024-06-27 20:52:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 121 transitions. [2024-06-27 20:52:46,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32526881720430106 [2024-06-27 20:52:46,093 INFO L175 Difference]: Start difference. First operand has 109 places, 54 transitions, 330 flow. Second operand 12 states and 121 transitions. [2024-06-27 20:52:46,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 71 transitions, 504 flow [2024-06-27 20:52:46,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 71 transitions, 470 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 20:52:46,105 INFO L231 Difference]: Finished difference. Result has 106 places, 50 transitions, 300 flow [2024-06-27 20:52:46,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=300, PETRI_PLACES=106, PETRI_TRANSITIONS=50} [2024-06-27 20:52:46,105 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 76 predicate places. [2024-06-27 20:52:46,105 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 50 transitions, 300 flow [2024-06-27 20:52:46,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:46,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:46,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:46,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-27 20:52:46,106 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:46,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:46,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1397886778, now seen corresponding path program 18 times [2024-06-27 20:52:46,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:46,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667035634] [2024-06-27 20:52:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:46,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:47,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:47,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667035634] [2024-06-27 20:52:47,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667035634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:47,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:47,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:52:47,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210589895] [2024-06-27 20:52:47,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:47,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:52:47,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:47,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:52:47,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:52:48,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:48,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 50 transitions, 300 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) [2024-06-27 20:52:48,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:48,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:48,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:48,276 INFO L124 PetriNetUnfolderBase]: 143/314 cut-off events. [2024-06-27 20:52:48,277 INFO L125 PetriNetUnfolderBase]: For 12222/12222 co-relation queries the response was YES. [2024-06-27 20:52:48,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1446 conditions, 314 events. 143/314 cut-off events. For 12222/12222 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1245 event pairs, 47 based on Foata normal form. 6/319 useless extension candidates. Maximal degree in co-relation 1406. Up to 192 conditions per place. [2024-06-27 20:52:48,278 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 36 selfloop transitions, 17 changer transitions 11/66 dead transitions. [2024-06-27 20:52:48,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 66 transitions, 462 flow [2024-06-27 20:52:48,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:48,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 118 transitions. [2024-06-27 20:52:48,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3172043010752688 [2024-06-27 20:52:48,279 INFO L175 Difference]: Start difference. First operand has 106 places, 50 transitions, 300 flow. Second operand 12 states and 118 transitions. [2024-06-27 20:52:48,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 66 transitions, 462 flow [2024-06-27 20:52:48,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 66 transitions, 427 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-27 20:52:48,290 INFO L231 Difference]: Finished difference. Result has 100 places, 47 transitions, 286 flow [2024-06-27 20:52:48,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=286, PETRI_PLACES=100, PETRI_TRANSITIONS=47} [2024-06-27 20:52:48,290 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 70 predicate places. [2024-06-27 20:52:48,290 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 47 transitions, 286 flow [2024-06-27 20:52:48,290 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) [2024-06-27 20:52:48,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:48,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:48,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-27 20:52:48,290 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:48,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:48,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2071577656, now seen corresponding path program 19 times [2024-06-27 20:52:48,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:48,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339405865] [2024-06-27 20:52:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:48,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:50,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:50,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339405865] [2024-06-27 20:52:50,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339405865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:50,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:50,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:52:50,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832998445] [2024-06-27 20:52:50,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:50,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:52:50,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:50,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:52:50,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:52:50,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:50,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 47 transitions, 286 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:50,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:50,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:50,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:50,628 INFO L124 PetriNetUnfolderBase]: 133/296 cut-off events. [2024-06-27 20:52:50,629 INFO L125 PetriNetUnfolderBase]: For 10750/10750 co-relation queries the response was YES. [2024-06-27 20:52:50,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1353 conditions, 296 events. 133/296 cut-off events. For 10750/10750 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1156 event pairs, 45 based on Foata normal form. 6/301 useless extension candidates. Maximal degree in co-relation 1316. Up to 210 conditions per place. [2024-06-27 20:52:50,630 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 38 selfloop transitions, 9 changer transitions 15/64 dead transitions. [2024-06-27 20:52:50,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 64 transitions, 446 flow [2024-06-27 20:52:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:50,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:50,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 120 transitions. [2024-06-27 20:52:50,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-27 20:52:50,631 INFO L175 Difference]: Start difference. First operand has 100 places, 47 transitions, 286 flow. Second operand 12 states and 120 transitions. [2024-06-27 20:52:50,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 64 transitions, 446 flow [2024-06-27 20:52:50,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 64 transitions, 406 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 20:52:50,639 INFO L231 Difference]: Finished difference. Result has 95 places, 42 transitions, 243 flow [2024-06-27 20:52:50,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=243, PETRI_PLACES=95, PETRI_TRANSITIONS=42} [2024-06-27 20:52:50,639 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-06-27 20:52:50,639 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 42 transitions, 243 flow [2024-06-27 20:52:50,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:50,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:50,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:50,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-27 20:52:50,640 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:50,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:50,640 INFO L85 PathProgramCache]: Analyzing trace with hash 601730504, now seen corresponding path program 20 times [2024-06-27 20:52:50,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:50,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569515027] [2024-06-27 20:52:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:50,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:52,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:52,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569515027] [2024-06-27 20:52:52,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569515027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:52,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:52,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:52:52,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387945609] [2024-06-27 20:52:52,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:52,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:52:52,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:52,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:52:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:52:52,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:52,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 42 transitions, 243 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:52,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:52,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:52,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:52,454 INFO L124 PetriNetUnfolderBase]: 105/236 cut-off events. [2024-06-27 20:52:52,454 INFO L125 PetriNetUnfolderBase]: For 7014/7014 co-relation queries the response was YES. [2024-06-27 20:52:52,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 987 conditions, 236 events. 105/236 cut-off events. For 7014/7014 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 829 event pairs, 38 based on Foata normal form. 6/241 useless extension candidates. Maximal degree in co-relation 952. Up to 167 conditions per place. [2024-06-27 20:52:52,455 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 36 selfloop transitions, 9 changer transitions 9/56 dead transitions. [2024-06-27 20:52:52,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 56 transitions, 381 flow [2024-06-27 20:52:52,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:52:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:52:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-27 20:52:52,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3196480938416422 [2024-06-27 20:52:52,456 INFO L175 Difference]: Start difference. First operand has 95 places, 42 transitions, 243 flow. Second operand 11 states and 109 transitions. [2024-06-27 20:52:52,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 56 transitions, 381 flow [2024-06-27 20:52:52,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 56 transitions, 345 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-27 20:52:52,461 INFO L231 Difference]: Finished difference. Result has 86 places, 39 transitions, 213 flow [2024-06-27 20:52:52,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=213, PETRI_PLACES=86, PETRI_TRANSITIONS=39} [2024-06-27 20:52:52,461 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2024-06-27 20:52:52,461 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 39 transitions, 213 flow [2024-06-27 20:52:52,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:52,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:52,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:52,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-27 20:52:52,462 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:52,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1204641766, now seen corresponding path program 21 times [2024-06-27 20:52:52,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:52,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374592408] [2024-06-27 20:52:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:52,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:54,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:54,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374592408] [2024-06-27 20:52:54,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374592408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:54,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:54,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:52:54,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97153876] [2024-06-27 20:52:54,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:54,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:52:54,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:54,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:52:54,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:52:54,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:54,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 39 transitions, 213 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:54,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:54,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:54,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:54,587 INFO L124 PetriNetUnfolderBase]: 95/218 cut-off events. [2024-06-27 20:52:54,587 INFO L125 PetriNetUnfolderBase]: For 5580/5580 co-relation queries the response was YES. [2024-06-27 20:52:54,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 218 events. 95/218 cut-off events. For 5580/5580 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 741 event pairs, 21 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 856. Up to 127 conditions per place. [2024-06-27 20:52:54,588 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 31 selfloop transitions, 12 changer transitions 10/55 dead transitions. [2024-06-27 20:52:54,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 55 transitions, 353 flow [2024-06-27 20:52:54,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 119 transitions. [2024-06-27 20:52:54,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31989247311827956 [2024-06-27 20:52:54,588 INFO L175 Difference]: Start difference. First operand has 86 places, 39 transitions, 213 flow. Second operand 12 states and 119 transitions. [2024-06-27 20:52:54,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 55 transitions, 353 flow [2024-06-27 20:52:54,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 55 transitions, 329 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 20:52:54,593 INFO L231 Difference]: Finished difference. Result has 83 places, 35 transitions, 197 flow [2024-06-27 20:52:54,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=197, PETRI_PLACES=83, PETRI_TRANSITIONS=35} [2024-06-27 20:52:54,593 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2024-06-27 20:52:54,594 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 35 transitions, 197 flow [2024-06-27 20:52:54,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:54,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:54,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:54,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-27 20:52:54,594 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:54,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:54,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1405990486, now seen corresponding path program 22 times [2024-06-27 20:52:54,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:54,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373530959] [2024-06-27 20:52:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:54,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:57,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:57,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373530959] [2024-06-27 20:52:57,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373530959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:57,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:57,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:52:57,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441365229] [2024-06-27 20:52:57,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:57,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:52:57,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:57,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:52:57,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:52:57,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:52:57,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 35 transitions, 197 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:57,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:57,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:52:57,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:58,306 INFO L124 PetriNetUnfolderBase]: 68/161 cut-off events. [2024-06-27 20:52:58,306 INFO L125 PetriNetUnfolderBase]: For 3168/3168 co-relation queries the response was YES. [2024-06-27 20:52:58,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 161 events. 68/161 cut-off events. For 3168/3168 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 466 event pairs, 17 based on Foata normal form. 6/166 useless extension candidates. Maximal degree in co-relation 566. Up to 90 conditions per place. [2024-06-27 20:52:58,307 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 24 selfloop transitions, 7 changer transitions 17/50 dead transitions. [2024-06-27 20:52:58,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 50 transitions, 325 flow [2024-06-27 20:52:58,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:58,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:58,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 116 transitions. [2024-06-27 20:52:58,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3118279569892473 [2024-06-27 20:52:58,307 INFO L175 Difference]: Start difference. First operand has 83 places, 35 transitions, 197 flow. Second operand 12 states and 116 transitions. [2024-06-27 20:52:58,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 50 transitions, 325 flow [2024-06-27 20:52:58,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 50 transitions, 293 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-27 20:52:58,310 INFO L231 Difference]: Finished difference. Result has 77 places, 29 transitions, 153 flow [2024-06-27 20:52:58,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=153, PETRI_PLACES=77, PETRI_TRANSITIONS=29} [2024-06-27 20:52:58,310 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-27 20:52:58,310 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 29 transitions, 153 flow [2024-06-27 20:52:58,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:58,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:58,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:58,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-27 20:52:58,310 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:52:58,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:58,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1398146248, now seen corresponding path program 23 times [2024-06-27 20:52:58,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:58,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831376788] [2024-06-27 20:52:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:58,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:00,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:00,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831376788] [2024-06-27 20:53:00,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831376788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:00,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:00,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:53:00,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732154741] [2024-06-27 20:53:00,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:00,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:53:00,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:00,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:53:00,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:53:00,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:53:00,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 29 transitions, 153 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) [2024-06-27 20:53:00,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:00,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:53:00,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:00,426 INFO L124 PetriNetUnfolderBase]: 57/136 cut-off events. [2024-06-27 20:53:00,426 INFO L125 PetriNetUnfolderBase]: For 2390/2390 co-relation queries the response was YES. [2024-06-27 20:53:00,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 136 events. 57/136 cut-off events. For 2390/2390 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 348 event pairs, 15 based on Foata normal form. 6/141 useless extension candidates. Maximal degree in co-relation 464. Up to 52 conditions per place. [2024-06-27 20:53:00,426 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 19 selfloop transitions, 6 changer transitions 18/45 dead transitions. [2024-06-27 20:53:00,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 45 transitions, 273 flow [2024-06-27 20:53:00,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:53:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:53:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 114 transitions. [2024-06-27 20:53:00,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3064516129032258 [2024-06-27 20:53:00,427 INFO L175 Difference]: Start difference. First operand has 77 places, 29 transitions, 153 flow. Second operand 12 states and 114 transitions. [2024-06-27 20:53:00,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 45 transitions, 273 flow [2024-06-27 20:53:00,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 45 transitions, 247 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-27 20:53:00,429 INFO L231 Difference]: Finished difference. Result has 65 places, 22 transitions, 110 flow [2024-06-27 20:53:00,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=110, PETRI_PLACES=65, PETRI_TRANSITIONS=22} [2024-06-27 20:53:00,429 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-27 20:53:00,429 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 22 transitions, 110 flow [2024-06-27 20:53:00,429 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) [2024-06-27 20:53:00,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:00,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:00,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-27 20:53:00,429 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:53:00,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:00,429 INFO L85 PathProgramCache]: Analyzing trace with hash 389834356, now seen corresponding path program 24 times [2024-06-27 20:53:00,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:00,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240463308] [2024-06-27 20:53:00,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:00,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:01,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:01,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240463308] [2024-06-27 20:53:01,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240463308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:01,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:01,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:53:01,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274901628] [2024-06-27 20:53:01,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:01,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:53:01,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:01,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:53:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:53:02,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:53:02,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 22 transitions, 110 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:02,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:02,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:53:02,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:02,236 INFO L124 PetriNetUnfolderBase]: 27/70 cut-off events. [2024-06-27 20:53:02,236 INFO L125 PetriNetUnfolderBase]: For 684/684 co-relation queries the response was YES. [2024-06-27 20:53:02,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 70 events. 27/70 cut-off events. For 684/684 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 101 event pairs, 0 based on Foata normal form. 6/75 useless extension candidates. Maximal degree in co-relation 182. Up to 32 conditions per place. [2024-06-27 20:53:02,237 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2024-06-27 20:53:02,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 30 transitions, 152 flow [2024-06-27 20:53:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:53:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:53:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 95 transitions. [2024-06-27 20:53:02,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2785923753665689 [2024-06-27 20:53:02,237 INFO L175 Difference]: Start difference. First operand has 65 places, 22 transitions, 110 flow. Second operand 11 states and 95 transitions. [2024-06-27 20:53:02,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 30 transitions, 152 flow [2024-06-27 20:53:02,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 30 transitions, 124 flow, removed 1 selfloop flow, removed 14 redundant places. [2024-06-27 20:53:02,238 INFO L231 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2024-06-27 20:53:02,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=49, PETRI_TRANSITIONS=0} [2024-06-27 20:53:02,238 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2024-06-27 20:53:02,238 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2024-06-27 20:53:02,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:02,240 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-27 20:53:02,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-27 20:53:02,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-27 20:53:02,244 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-27 20:53:02,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-27 20:53:02,244 INFO L445 BasicCegarLoop]: Path program histogram: [40, 32, 24, 20, 19, 17, 15, 10, 7, 6, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:02,247 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 20:53:02,247 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 20:53:02,250 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 20:53:02,250 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 20:53:02,251 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 08:53:02 BasicIcfg [2024-06-27 20:53:02,251 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 20:53:02,251 INFO L158 Benchmark]: Toolchain (without parser) took 502545.48ms. Allocated memory was 188.7MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 111.6MB in the beginning and 671.6MB in the end (delta: -560.0MB). Peak memory consumption was 914.3MB. Max. memory is 16.1GB. [2024-06-27 20:53:02,251 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 104.9MB. Free memory is still 68.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 20:53:02,252 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 188.7MB. Free memory is still 117.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 20:53:02,252 INFO L158 Benchmark]: CACSL2BoogieTranslator took 722.86ms. Allocated memory is still 188.7MB. Free memory was 111.4MB in the beginning and 132.6MB in the end (delta: -21.2MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. [2024-06-27 20:53:02,252 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.35ms. Allocated memory is still 188.7MB. Free memory was 132.6MB in the beginning and 129.4MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-27 20:53:02,252 INFO L158 Benchmark]: Boogie Preprocessor took 46.89ms. Allocated memory is still 188.7MB. Free memory was 129.4MB in the beginning and 126.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 20:53:02,253 INFO L158 Benchmark]: RCFGBuilder took 755.33ms. Allocated memory is still 188.7MB. Free memory was 126.3MB in the beginning and 69.7MB in the end (delta: 56.6MB). Peak memory consumption was 56.6MB. Max. memory is 16.1GB. [2024-06-27 20:53:02,253 INFO L158 Benchmark]: TraceAbstraction took 500961.93ms. Allocated memory was 188.7MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 69.7MB in the beginning and 671.6MB in the end (delta: -601.9MB). Peak memory consumption was 871.2MB. Max. memory is 16.1GB. [2024-06-27 20:53:02,254 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 104.9MB. Free memory is still 68.6MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.16ms. Allocated memory is still 188.7MB. Free memory is still 117.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 722.86ms. Allocated memory is still 188.7MB. Free memory was 111.4MB in the beginning and 132.6MB in the end (delta: -21.2MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.35ms. Allocated memory is still 188.7MB. Free memory was 132.6MB in the beginning and 129.4MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.89ms. Allocated memory is still 188.7MB. Free memory was 129.4MB in the beginning and 126.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 755.33ms. Allocated memory is still 188.7MB. Free memory was 126.3MB in the beginning and 69.7MB in the end (delta: 56.6MB). Peak memory consumption was 56.6MB. Max. memory is 16.1GB. * TraceAbstraction took 500961.93ms. Allocated memory was 188.7MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 69.7MB in the beginning and 671.6MB in the end (delta: -601.9MB). Peak memory consumption was 871.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 834]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 835]: 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: 500.8s, OverallIterations: 221, TraceHistogramMax: 1, PathProgramHistogramMax: 40, EmptinessCheckTime: 0.0s, AutomataDifference: 220.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15458 SdHoareTripleChecker+Valid, 73.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13297 mSDsluCounter, 9504 SdHoareTripleChecker+Invalid, 63.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8636 mSDsCounter, 3850 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 110387 IncrementalHoareTripleChecker+Invalid, 114237 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3850 mSolverCounterUnsat, 868 mSDtfsCounter, 110387 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2719 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 2693 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6344 ImplicationChecksByTransitivity, 92.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2898occurred in iteration=141, InterpolantAutomatonStates: 2297, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 276.6s InterpolantComputationTime, 3695 NumberOfCodeBlocks, 3695 NumberOfCodeBlocksAsserted, 221 NumberOfCheckSat, 3474 ConstructedInterpolants, 0 QuantifiedInterpolants, 174880 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 221 InterpolantComputations, 221 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! [2024-06-27 20:53:02,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE