./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:05:41,740 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:05:41,800 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:05:41,803 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:05:41,803 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:05:41,835 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:05:41,836 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:05:41,836 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:05:41,837 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:05:41,839 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:05:41,840 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:05:41,840 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:05:41,841 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:05:41,841 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:05:41,842 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:05:41,842 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:05:41,842 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:05:41,842 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:05:41,842 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:05:41,842 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:05:41,842 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:05:41,843 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:05:41,843 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:05:41,843 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:05:41,844 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:05:41,844 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:05:41,844 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:05:41,844 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:05:41,845 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:05:41,845 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:05:41,846 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:05:41,846 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:05:41,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:05:41,846 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:05:41,846 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:05:41,847 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:05:41,847 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:05:41,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:05:41,847 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:05:41,847 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:05:41,847 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:05:41,848 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:05:41,848 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:05:41,848 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:05:42,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:05:42,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:05:42,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:05:42,067 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:05:42,068 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:05:42,069 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-21 17:05:42,212 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:05:42,212 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:05:42,213 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 17:05:43,172 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:05:43,366 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:05:43,367 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 17:05:43,381 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80c560a00/cbcae25016f44ebeb9d5e7dd36e6f6d7/FLAG4b39e7694 [2024-06-21 17:05:43,392 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80c560a00/cbcae25016f44ebeb9d5e7dd36e6f6d7 [2024-06-21 17:05:43,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:05:43,394 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:05:43,395 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:05:43,395 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:05:43,398 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:05:43,399 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:05:42" (1/2) ... [2024-06-21 17:05:43,400 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27800bab and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:05:43, skipping insertion in model container [2024-06-21 17:05:43,400 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:05:42" (1/2) ... [2024-06-21 17:05:43,401 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@126d90d5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:05:43, skipping insertion in model container [2024-06-21 17:05:43,401 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:05:43" (2/2) ... [2024-06-21 17:05:43,402 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27800bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:43, skipping insertion in model container [2024-06-21 17:05:43,402 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:05:43" (2/2) ... [2024-06-21 17:05:43,402 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:05:43,453 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:05:43,453 INFO L97 edCorrectnessWitness]: Location invariant before [L816-L816] (((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) [2024-06-21 17:05:43,454 INFO L97 edCorrectnessWitness]: Location invariant before [L817-L817] (((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) [2024-06-21 17:05:43,454 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:05:43,454 INFO L106 edCorrectnessWitness]: ghost_update [L814-L814] multithreaded = 1; [2024-06-21 17:05:43,491 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:05:43,810 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:05:43,820 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:05:43,914 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:05:43,939 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:05:43,939 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:43 WrapperNode [2024-06-21 17:05:43,940 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:05:43,940 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:05:43,941 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:05:43,941 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:05:43,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:43" (1/1) ... [2024-06-21 17:05:43,956 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:43" (1/1) ... [2024-06-21 17:05:43,982 INFO L138 Inliner]: procedures = 174, calls = 40, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 120 [2024-06-21 17:05:43,983 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:05:43,983 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:05:43,983 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:05:43,983 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:05:43,994 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:43" (1/1) ... [2024-06-21 17:05:43,995 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:43" (1/1) ... [2024-06-21 17:05:43,999 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:43" (1/1) ... [2024-06-21 17:05:44,018 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 17:05:44,018 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:43" (1/1) ... [2024-06-21 17:05:44,018 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:43" (1/1) ... [2024-06-21 17:05:44,025 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:43" (1/1) ... [2024-06-21 17:05:44,026 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:43" (1/1) ... [2024-06-21 17:05:44,028 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:43" (1/1) ... [2024-06-21 17:05:44,029 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:43" (1/1) ... [2024-06-21 17:05:44,033 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:05:44,044 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:05:44,044 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:05:44,044 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:05:44,045 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:43" (1/1) ... [2024-06-21 17:05:44,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:05:44,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:05:44,081 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:05:44,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:05:44,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:05:44,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:05:44,113 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:05:44,114 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:05:44,114 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:05:44,114 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:05:44,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:05:44,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:05:44,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:05:44,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:05:44,116 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:05:44,238 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:05:44,240 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:05:44,501 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:05:44,501 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:05:44,642 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:05:44,642 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:05:44,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:05:44 BoogieIcfgContainer [2024-06-21 17:05:44,644 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:05:44,646 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:05:44,647 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:05:44,649 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:05:44,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:05:42" (1/4) ... [2024-06-21 17:05:44,650 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af27dca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:05:44, skipping insertion in model container [2024-06-21 17:05:44,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:05:43" (2/4) ... [2024-06-21 17:05:44,654 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af27dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:05:44, skipping insertion in model container [2024-06-21 17:05:44,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:43" (3/4) ... [2024-06-21 17:05:44,654 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af27dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:05:44, skipping insertion in model container [2024-06-21 17:05:44,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:05:44" (4/4) ... [2024-06-21 17:05:44,656 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 17:05:44,670 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:05:44,670 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 17:05:44,670 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:05:44,701 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:05:44,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 32 transitions, 72 flow [2024-06-21 17:05:44,752 INFO L124 PetriNetUnfolderBase]: 0/30 cut-off events. [2024-06-21 17:05:44,753 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:05:44,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 30 events. 0/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 44 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:05:44,759 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 32 transitions, 72 flow [2024-06-21 17:05:44,761 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 24 transitions, 54 flow [2024-06-21 17:05:44,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:05:44,780 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;@1bf54c68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:05:44,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 17:05:44,783 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:05:44,783 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:05:44,783 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:05:44,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:44,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:05:44,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:44,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:44,788 INFO L85 PathProgramCache]: Analyzing trace with hash 325199742, now seen corresponding path program 1 times [2024-06-21 17:05:44,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:44,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825214193] [2024-06-21 17:05:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:44,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:45,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:45,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825214193] [2024-06-21 17:05:45,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825214193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:45,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:45,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:05:45,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68388809] [2024-06-21 17:05:45,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:45,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:05:45,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:45,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:05:45,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:05:45,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-21 17:05:45,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:45,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:45,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-21 17:05:45,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:45,736 INFO L124 PetriNetUnfolderBase]: 131/269 cut-off events. [2024-06-21 17:05:45,737 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 17:05:45,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 269 events. 131/269 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1071 event pairs, 75 based on Foata normal form. 1/257 useless extension candidates. Maximal degree in co-relation 514. Up to 235 conditions per place. [2024-06-21 17:05:45,742 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 20 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2024-06-21 17:05:45,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 115 flow [2024-06-21 17:05:45,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:05:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:05:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-06-21 17:05:45,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-06-21 17:05:45,752 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 54 flow. Second operand 3 states and 61 transitions. [2024-06-21 17:05:45,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 115 flow [2024-06-21 17:05:45,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 17:05:45,756 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 73 flow [2024-06-21 17:05:45,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-06-21 17:05:45,761 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2024-06-21 17:05:45,761 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 73 flow [2024-06-21 17:05:45,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:45,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:45,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:45,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:05:45,762 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:45,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1015624547, now seen corresponding path program 1 times [2024-06-21 17:05:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:45,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374111057] [2024-06-21 17:05:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:45,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:46,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:46,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374111057] [2024-06-21 17:05:46,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374111057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:46,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:46,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:05:46,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994727808] [2024-06-21 17:05:46,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:46,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:05:46,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:46,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:05:46,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:05:46,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-21 17:05:46,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 73 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) [2024-06-21 17:05:46,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:46,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-21 17:05:46,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:46,494 INFO L124 PetriNetUnfolderBase]: 169/317 cut-off events. [2024-06-21 17:05:46,495 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-06-21 17:05:46,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 317 events. 169/317 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1198 event pairs, 70 based on Foata normal form. 4/320 useless extension candidates. Maximal degree in co-relation 710. Up to 281 conditions per place. [2024-06-21 17:05:46,497 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 27 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2024-06-21 17:05:46,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 165 flow [2024-06-21 17:05:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:05:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:05:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-06-21 17:05:46,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-21 17:05:46,513 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 73 flow. Second operand 4 states and 74 transitions. [2024-06-21 17:05:46,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 165 flow [2024-06-21 17:05:46,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:05:46,517 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 97 flow [2024-06-21 17:05:46,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2024-06-21 17:05:46,518 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2024-06-21 17:05:46,518 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 97 flow [2024-06-21 17:05:46,518 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) [2024-06-21 17:05:46,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:46,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:46,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:05:46,519 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:46,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:46,522 INFO L85 PathProgramCache]: Analyzing trace with hash 843623674, now seen corresponding path program 1 times [2024-06-21 17:05:46,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:46,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620731882] [2024-06-21 17:05:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:46,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:47,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:47,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620731882] [2024-06-21 17:05:47,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620731882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:47,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:47,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:05:47,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960928928] [2024-06-21 17:05:47,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:47,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:05:47,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:47,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:05:47,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:05:47,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-21 17:05:47,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 97 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:47,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:47,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-21 17:05:47,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:47,183 INFO L124 PetriNetUnfolderBase]: 123/252 cut-off events. [2024-06-21 17:05:47,184 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2024-06-21 17:05:47,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 252 events. 123/252 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 977 event pairs, 62 based on Foata normal form. 1/247 useless extension candidates. Maximal degree in co-relation 617. Up to 219 conditions per place. [2024-06-21 17:05:47,186 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 23 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2024-06-21 17:05:47,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 173 flow [2024-06-21 17:05:47,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:05:47,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:05:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-06-21 17:05:47,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-21 17:05:47,187 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 97 flow. Second operand 5 states and 78 transitions. [2024-06-21 17:05:47,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 173 flow [2024-06-21 17:05:47,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 35 transitions, 164 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 17:05:47,189 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 115 flow [2024-06-21 17:05:47,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2024-06-21 17:05:47,189 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-06-21 17:05:47,190 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 115 flow [2024-06-21 17:05:47,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:47,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:47,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:47,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:05:47,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:47,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:47,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1577241307, now seen corresponding path program 1 times [2024-06-21 17:05:47,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:47,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162313722] [2024-06-21 17:05:47,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:47,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:48,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:48,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162313722] [2024-06-21 17:05:48,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162313722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:48,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:48,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:05:48,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234982365] [2024-06-21 17:05:48,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:48,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:05:48,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:48,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:05:48,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:05:48,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-21 17:05:48,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 115 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:48,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:48,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-21 17:05:48,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:48,191 INFO L124 PetriNetUnfolderBase]: 163/306 cut-off events. [2024-06-21 17:05:48,191 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2024-06-21 17:05:48,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 837 conditions, 306 events. 163/306 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1181 event pairs, 29 based on Foata normal form. 4/309 useless extension candidates. Maximal degree in co-relation 821. Up to 252 conditions per place. [2024-06-21 17:05:48,215 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 32 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2024-06-21 17:05:48,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 45 transitions, 229 flow [2024-06-21 17:05:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:05:48,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:05:48,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-21 17:05:48,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-21 17:05:48,219 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 115 flow. Second operand 6 states and 100 transitions. [2024-06-21 17:05:48,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 45 transitions, 229 flow [2024-06-21 17:05:48,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 218 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 17:05:48,221 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 129 flow [2024-06-21 17:05:48,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2024-06-21 17:05:48,223 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-21 17:05:48,223 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 129 flow [2024-06-21 17:05:48,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:48,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:48,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:48,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:05:48,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:48,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:48,224 INFO L85 PathProgramCache]: Analyzing trace with hash 382530951, now seen corresponding path program 1 times [2024-06-21 17:05:48,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:48,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350658223] [2024-06-21 17:05:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:48,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:48,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:48,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350658223] [2024-06-21 17:05:48,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350658223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:48,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:48,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:05:48,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147626950] [2024-06-21 17:05:48,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:48,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:05:48,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:48,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:05:48,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:05:48,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:05:48,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 129 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:48,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:48,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:05:48,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:48,875 INFO L124 PetriNetUnfolderBase]: 179/336 cut-off events. [2024-06-21 17:05:48,875 INFO L125 PetriNetUnfolderBase]: For 532/532 co-relation queries the response was YES. [2024-06-21 17:05:48,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 993 conditions, 336 events. 179/336 cut-off events. For 532/532 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1350 event pairs, 49 based on Foata normal form. 3/337 useless extension candidates. Maximal degree in co-relation 975. Up to 269 conditions per place. [2024-06-21 17:05:48,877 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 30 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2024-06-21 17:05:48,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 267 flow [2024-06-21 17:05:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:05:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:05:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2024-06-21 17:05:48,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 17:05:48,879 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 129 flow. Second operand 6 states and 87 transitions. [2024-06-21 17:05:48,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 267 flow [2024-06-21 17:05:48,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 251 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 17:05:48,881 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 181 flow [2024-06-21 17:05:48,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2024-06-21 17:05:48,881 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2024-06-21 17:05:48,881 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 181 flow [2024-06-21 17:05:48,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:48,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:48,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:48,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:05:48,882 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:48,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:48,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1569247621, now seen corresponding path program 1 times [2024-06-21 17:05:48,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:48,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464187742] [2024-06-21 17:05:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:48,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:49,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:49,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464187742] [2024-06-21 17:05:49,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464187742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:49,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:49,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:05:49,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817377185] [2024-06-21 17:05:49,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:49,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:05:49,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:05:49,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:05:49,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:05:49,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 181 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:49,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:49,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:05:49,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:49,478 INFO L124 PetriNetUnfolderBase]: 189/359 cut-off events. [2024-06-21 17:05:49,478 INFO L125 PetriNetUnfolderBase]: For 815/815 co-relation queries the response was YES. [2024-06-21 17:05:49,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 359 events. 189/359 cut-off events. For 815/815 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1459 event pairs, 53 based on Foata normal form. 2/360 useless extension candidates. Maximal degree in co-relation 1193. Up to 315 conditions per place. [2024-06-21 17:05:49,480 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 38 selfloop transitions, 11 changer transitions 0/53 dead transitions. [2024-06-21 17:05:49,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 341 flow [2024-06-21 17:05:49,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:49,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-21 17:05:49,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:05:49,481 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 181 flow. Second operand 7 states and 96 transitions. [2024-06-21 17:05:49,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 341 flow [2024-06-21 17:05:49,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 327 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 17:05:49,484 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 236 flow [2024-06-21 17:05:49,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=236, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2024-06-21 17:05:49,485 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2024-06-21 17:05:49,485 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 236 flow [2024-06-21 17:05:49,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:49,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:49,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:49,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:05:49,486 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:49,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:49,486 INFO L85 PathProgramCache]: Analyzing trace with hash -167813091, now seen corresponding path program 2 times [2024-06-21 17:05:49,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:49,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774184415] [2024-06-21 17:05:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:49,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:49,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:49,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774184415] [2024-06-21 17:05:49,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774184415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:49,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:49,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:05:49,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376239652] [2024-06-21 17:05:49,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:49,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:05:49,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:05:49,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:05:49,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:05:49,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 236 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:49,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:49,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:05:49,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:50,126 INFO L124 PetriNetUnfolderBase]: 195/373 cut-off events. [2024-06-21 17:05:50,126 INFO L125 PetriNetUnfolderBase]: For 1156/1156 co-relation queries the response was YES. [2024-06-21 17:05:50,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 373 events. 195/373 cut-off events. For 1156/1156 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1547 event pairs, 50 based on Foata normal form. 2/374 useless extension candidates. Maximal degree in co-relation 1327. Up to 319 conditions per place. [2024-06-21 17:05:50,129 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 37 selfloop transitions, 12 changer transitions 0/53 dead transitions. [2024-06-21 17:05:50,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 53 transitions, 379 flow [2024-06-21 17:05:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:05:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:05:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-06-21 17:05:50,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:05:50,129 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 236 flow. Second operand 6 states and 84 transitions. [2024-06-21 17:05:50,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 53 transitions, 379 flow [2024-06-21 17:05:50,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 358 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 17:05:50,132 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 270 flow [2024-06-21 17:05:50,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-06-21 17:05:50,132 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 22 predicate places. [2024-06-21 17:05:50,132 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 270 flow [2024-06-21 17:05:50,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:50,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:50,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:50,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:05:50,133 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:50,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:50,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1026450471, now seen corresponding path program 3 times [2024-06-21 17:05:50,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:50,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624238249] [2024-06-21 17:05:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:50,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:50,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:50,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624238249] [2024-06-21 17:05:50,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624238249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:50,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:50,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:05:50,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535655364] [2024-06-21 17:05:50,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:50,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:05:50,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:50,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:05:50,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:05:50,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:05:50,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 270 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:50,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:50,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:05:50,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:50,769 INFO L124 PetriNetUnfolderBase]: 185/355 cut-off events. [2024-06-21 17:05:50,769 INFO L125 PetriNetUnfolderBase]: For 1424/1424 co-relation queries the response was YES. [2024-06-21 17:05:50,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1318 conditions, 355 events. 185/355 cut-off events. For 1424/1424 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1436 event pairs, 52 based on Foata normal form. 4/356 useless extension candidates. Maximal degree in co-relation 1293. Up to 269 conditions per place. [2024-06-21 17:05:50,772 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 32 selfloop transitions, 16 changer transitions 0/52 dead transitions. [2024-06-21 17:05:50,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 390 flow [2024-06-21 17:05:50,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:05:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:05:50,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2024-06-21 17:05:50,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2024-06-21 17:05:50,773 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 270 flow. Second operand 6 states and 86 transitions. [2024-06-21 17:05:50,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 390 flow [2024-06-21 17:05:50,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 360 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:05:50,775 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 279 flow [2024-06-21 17:05:50,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-06-21 17:05:50,776 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-21 17:05:50,776 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 279 flow [2024-06-21 17:05:50,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:50,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:50,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:50,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:05:50,777 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:50,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:50,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1026441543, now seen corresponding path program 1 times [2024-06-21 17:05:50,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:50,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538054573] [2024-06-21 17:05:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:50,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:51,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:51,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538054573] [2024-06-21 17:05:51,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538054573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:51,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:51,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:51,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323714394] [2024-06-21 17:05:51,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:51,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:51,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:51,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:51,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:51,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:05:51,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 279 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:51,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:51,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:05:51,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:51,536 INFO L124 PetriNetUnfolderBase]: 194/374 cut-off events. [2024-06-21 17:05:51,536 INFO L125 PetriNetUnfolderBase]: For 1351/1351 co-relation queries the response was YES. [2024-06-21 17:05:51,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1371 conditions, 374 events. 194/374 cut-off events. For 1351/1351 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1554 event pairs, 49 based on Foata normal form. 3/374 useless extension candidates. Maximal degree in co-relation 1345. Up to 260 conditions per place. [2024-06-21 17:05:51,538 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 34 selfloop transitions, 22 changer transitions 0/60 dead transitions. [2024-06-21 17:05:51,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 60 transitions, 461 flow [2024-06-21 17:05:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:51,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-21 17:05:51,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2024-06-21 17:05:51,540 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 279 flow. Second operand 7 states and 101 transitions. [2024-06-21 17:05:51,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 60 transitions, 461 flow [2024-06-21 17:05:51,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 416 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 17:05:51,542 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 314 flow [2024-06-21 17:05:51,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=314, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2024-06-21 17:05:51,543 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 26 predicate places. [2024-06-21 17:05:51,543 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 314 flow [2024-06-21 17:05:51,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:51,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:51,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:51,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:05:51,544 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:51,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:51,544 INFO L85 PathProgramCache]: Analyzing trace with hash -899609212, now seen corresponding path program 1 times [2024-06-21 17:05:51,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:51,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427656854] [2024-06-21 17:05:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:51,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:52,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:52,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427656854] [2024-06-21 17:05:52,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427656854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:52,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:52,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:52,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127120286] [2024-06-21 17:05:52,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:52,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:52,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:52,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:52,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:52,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:05:52,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 314 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:52,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:52,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:05:52,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:52,381 INFO L124 PetriNetUnfolderBase]: 203/385 cut-off events. [2024-06-21 17:05:52,381 INFO L125 PetriNetUnfolderBase]: For 1644/1644 co-relation queries the response was YES. [2024-06-21 17:05:52,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1501 conditions, 385 events. 203/385 cut-off events. For 1644/1644 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1593 event pairs, 54 based on Foata normal form. 3/385 useless extension candidates. Maximal degree in co-relation 1474. Up to 249 conditions per place. [2024-06-21 17:05:52,384 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 37 selfloop transitions, 26 changer transitions 0/67 dead transitions. [2024-06-21 17:05:52,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 524 flow [2024-06-21 17:05:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-21 17:05:52,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44921875 [2024-06-21 17:05:52,385 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 314 flow. Second operand 8 states and 115 transitions. [2024-06-21 17:05:52,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 524 flow [2024-06-21 17:05:52,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 67 transitions, 499 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 17:05:52,388 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 383 flow [2024-06-21 17:05:52,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=383, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2024-06-21 17:05:52,389 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 31 predicate places. [2024-06-21 17:05:52,389 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 383 flow [2024-06-21 17:05:52,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:52,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:52,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:52,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:05:52,390 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:52,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:52,390 INFO L85 PathProgramCache]: Analyzing trace with hash 963063080, now seen corresponding path program 1 times [2024-06-21 17:05:52,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:52,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630827286] [2024-06-21 17:05:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:52,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:53,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:53,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630827286] [2024-06-21 17:05:53,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630827286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:53,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:53,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:53,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108122097] [2024-06-21 17:05:53,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:53,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:53,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:53,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:53,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:53,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:05:53,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 383 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:53,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:53,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:05:53,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:53,313 INFO L124 PetriNetUnfolderBase]: 201/384 cut-off events. [2024-06-21 17:05:53,313 INFO L125 PetriNetUnfolderBase]: For 1958/1958 co-relation queries the response was YES. [2024-06-21 17:05:53,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1618 conditions, 384 events. 201/384 cut-off events. For 1958/1958 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1602 event pairs, 56 based on Foata normal form. 1/384 useless extension candidates. Maximal degree in co-relation 1589. Up to 327 conditions per place. [2024-06-21 17:05:53,315 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 52 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-21 17:05:53,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 561 flow [2024-06-21 17:05:53,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:53,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:53,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-06-21 17:05:53,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4330357142857143 [2024-06-21 17:05:53,317 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 383 flow. Second operand 7 states and 97 transitions. [2024-06-21 17:05:53,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 561 flow [2024-06-21 17:05:53,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 68 transitions, 528 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 17:05:53,320 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 399 flow [2024-06-21 17:05:53,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=399, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-06-21 17:05:53,321 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 34 predicate places. [2024-06-21 17:05:53,321 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 399 flow [2024-06-21 17:05:53,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:53,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:53,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:53,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:05:53,321 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:53,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:53,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1431876346, now seen corresponding path program 1 times [2024-06-21 17:05:53,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:53,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290458419] [2024-06-21 17:05:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:53,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:53,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:53,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290458419] [2024-06-21 17:05:53,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290458419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:53,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:53,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:53,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001981396] [2024-06-21 17:05:53,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:53,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:53,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:53,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:53,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:05:53,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 399 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:53,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:53,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:05:53,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:54,086 INFO L124 PetriNetUnfolderBase]: 207/396 cut-off events. [2024-06-21 17:05:54,086 INFO L125 PetriNetUnfolderBase]: For 2411/2411 co-relation queries the response was YES. [2024-06-21 17:05:54,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1710 conditions, 396 events. 207/396 cut-off events. For 2411/2411 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1673 event pairs, 50 based on Foata normal form. 2/395 useless extension candidates. Maximal degree in co-relation 1679. Up to 278 conditions per place. [2024-06-21 17:05:54,088 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 43 selfloop transitions, 22 changer transitions 0/69 dead transitions. [2024-06-21 17:05:54,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 595 flow [2024-06-21 17:05:54,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-21 17:05:54,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2024-06-21 17:05:54,089 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 399 flow. Second operand 7 states and 101 transitions. [2024-06-21 17:05:54,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 595 flow [2024-06-21 17:05:54,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 69 transitions, 562 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:05:54,092 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 429 flow [2024-06-21 17:05:54,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2024-06-21 17:05:54,093 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-06-21 17:05:54,093 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 429 flow [2024-06-21 17:05:54,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:54,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:54,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:54,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:05:54,093 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:54,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:54,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1432173016, now seen corresponding path program 2 times [2024-06-21 17:05:54,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:54,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860080385] [2024-06-21 17:05:54,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:54,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:54,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:54,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860080385] [2024-06-21 17:05:54,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860080385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:54,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:54,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:54,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398406794] [2024-06-21 17:05:54,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:54,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:54,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:54,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:54,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:54,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:05:54,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 429 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:54,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:54,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:05:54,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:54,984 INFO L124 PetriNetUnfolderBase]: 203/394 cut-off events. [2024-06-21 17:05:54,984 INFO L125 PetriNetUnfolderBase]: For 2675/2675 co-relation queries the response was YES. [2024-06-21 17:05:54,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1728 conditions, 394 events. 203/394 cut-off events. For 2675/2675 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1674 event pairs, 48 based on Foata normal form. 2/393 useless extension candidates. Maximal degree in co-relation 1696. Up to 275 conditions per place. [2024-06-21 17:05:54,987 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 42 selfloop transitions, 24 changer transitions 0/70 dead transitions. [2024-06-21 17:05:54,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 70 transitions, 597 flow [2024-06-21 17:05:54,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-21 17:05:54,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:05:54,987 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 429 flow. Second operand 8 states and 112 transitions. [2024-06-21 17:05:54,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 70 transitions, 597 flow [2024-06-21 17:05:54,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 542 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 17:05:54,991 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 427 flow [2024-06-21 17:05:54,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=427, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2024-06-21 17:05:54,992 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 39 predicate places. [2024-06-21 17:05:54,992 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 427 flow [2024-06-21 17:05:54,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:54,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:54,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:54,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:05:54,992 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:54,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:54,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1432183928, now seen corresponding path program 1 times [2024-06-21 17:05:54,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:54,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787677455] [2024-06-21 17:05:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:54,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:55,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:55,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787677455] [2024-06-21 17:05:55,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787677455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:55,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:55,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:05:55,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479102644] [2024-06-21 17:05:55,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:55,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:05:55,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:55,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:05:55,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:05:55,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:05:55,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 427 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:55,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:55,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:05:55,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:56,124 INFO L124 PetriNetUnfolderBase]: 207/401 cut-off events. [2024-06-21 17:05:56,124 INFO L125 PetriNetUnfolderBase]: For 2981/2981 co-relation queries the response was YES. [2024-06-21 17:05:56,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1776 conditions, 401 events. 207/401 cut-off events. For 2981/2981 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1703 event pairs, 46 based on Foata normal form. 3/401 useless extension candidates. Maximal degree in co-relation 1743. Up to 245 conditions per place. [2024-06-21 17:05:56,126 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 41 selfloop transitions, 31 changer transitions 0/76 dead transitions. [2024-06-21 17:05:56,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 665 flow [2024-06-21 17:05:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:05:56,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:05:56,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-06-21 17:05:56,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:05:56,128 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 427 flow. Second operand 9 states and 128 transitions. [2024-06-21 17:05:56,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 665 flow [2024-06-21 17:05:56,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 76 transitions, 610 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 17:05:56,133 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 479 flow [2024-06-21 17:05:56,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=479, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-06-21 17:05:56,133 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-06-21 17:05:56,133 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 479 flow [2024-06-21 17:05:56,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:56,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:56,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:56,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:05:56,134 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:56,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:56,134 INFO L85 PathProgramCache]: Analyzing trace with hash -200223423, now seen corresponding path program 1 times [2024-06-21 17:05:56,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:56,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969854995] [2024-06-21 17:05:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:56,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:56,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:56,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969854995] [2024-06-21 17:05:56,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969854995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:56,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:56,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:56,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291988679] [2024-06-21 17:05:56,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:56,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:56,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:56,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:56,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:56,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:05:56,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 479 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:56,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:56,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:05:56,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:56,917 INFO L124 PetriNetUnfolderBase]: 205/391 cut-off events. [2024-06-21 17:05:56,917 INFO L125 PetriNetUnfolderBase]: For 3129/3129 co-relation queries the response was YES. [2024-06-21 17:05:56,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1866 conditions, 391 events. 205/391 cut-off events. For 3129/3129 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1639 event pairs, 47 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 1832. Up to 286 conditions per place. [2024-06-21 17:05:56,919 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 46 selfloop transitions, 22 changer transitions 0/72 dead transitions. [2024-06-21 17:05:56,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 72 transitions, 661 flow [2024-06-21 17:05:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:05:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:05:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2024-06-21 17:05:56,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 17:05:56,920 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 479 flow. Second operand 6 states and 87 transitions. [2024-06-21 17:05:56,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 72 transitions, 661 flow [2024-06-21 17:05:56,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 72 transitions, 582 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 17:05:56,925 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 478 flow [2024-06-21 17:05:56,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=478, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2024-06-21 17:05:56,926 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2024-06-21 17:05:56,926 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 478 flow [2024-06-21 17:05:56,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:56,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:56,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:56,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:05:56,926 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:56,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:56,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1438494661, now seen corresponding path program 1 times [2024-06-21 17:05:56,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:56,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538404639] [2024-06-21 17:05:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:56,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:57,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:57,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538404639] [2024-06-21 17:05:57,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538404639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:57,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:57,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:57,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185985353] [2024-06-21 17:05:57,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:57,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:57,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:57,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:57,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:57,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:05:57,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 478 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:57,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:57,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:05:57,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:57,772 INFO L124 PetriNetUnfolderBase]: 211/408 cut-off events. [2024-06-21 17:05:57,773 INFO L125 PetriNetUnfolderBase]: For 3627/3627 co-relation queries the response was YES. [2024-06-21 17:05:57,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1921 conditions, 408 events. 211/408 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1734 event pairs, 49 based on Foata normal form. 2/407 useless extension candidates. Maximal degree in co-relation 1886. Up to 257 conditions per place. [2024-06-21 17:05:57,775 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 48 selfloop transitions, 27 changer transitions 0/79 dead transitions. [2024-06-21 17:05:57,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 79 transitions, 716 flow [2024-06-21 17:05:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:57,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-21 17:05:57,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44921875 [2024-06-21 17:05:57,777 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 478 flow. Second operand 8 states and 115 transitions. [2024-06-21 17:05:57,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 79 transitions, 716 flow [2024-06-21 17:05:57,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 79 transitions, 678 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 17:05:57,782 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 513 flow [2024-06-21 17:05:57,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=513, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2024-06-21 17:05:57,783 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-21 17:05:57,783 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 513 flow [2024-06-21 17:05:57,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:57,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:57,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:57,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:05:57,784 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:57,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:57,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1236008477, now seen corresponding path program 2 times [2024-06-21 17:05:57,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:57,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417840334] [2024-06-21 17:05:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:57,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:58,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:58,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417840334] [2024-06-21 17:05:58,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417840334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:58,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:58,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:05:58,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011325653] [2024-06-21 17:05:58,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:58,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:05:58,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:58,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:05:58,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:05:58,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:05:58,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 513 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:58,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:58,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:05:58,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:58,807 INFO L124 PetriNetUnfolderBase]: 217/420 cut-off events. [2024-06-21 17:05:58,807 INFO L125 PetriNetUnfolderBase]: For 4048/4048 co-relation queries the response was YES. [2024-06-21 17:05:58,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2026 conditions, 420 events. 217/420 cut-off events. For 4048/4048 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1824 event pairs, 49 based on Foata normal form. 2/419 useless extension candidates. Maximal degree in co-relation 1990. Up to 263 conditions per place. [2024-06-21 17:05:58,810 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 48 selfloop transitions, 31 changer transitions 0/83 dead transitions. [2024-06-21 17:05:58,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 773 flow [2024-06-21 17:05:58,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:05:58,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:05:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-06-21 17:05:58,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409722222222222 [2024-06-21 17:05:58,812 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 513 flow. Second operand 9 states and 127 transitions. [2024-06-21 17:05:58,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 773 flow [2024-06-21 17:05:58,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 83 transitions, 703 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:05:58,817 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 528 flow [2024-06-21 17:05:58,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=528, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2024-06-21 17:05:58,818 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 47 predicate places. [2024-06-21 17:05:58,818 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 528 flow [2024-06-21 17:05:58,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:58,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:58,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:58,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:05:58,819 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:58,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:58,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1236334907, now seen corresponding path program 3 times [2024-06-21 17:05:58,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:58,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385090483] [2024-06-21 17:05:58,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:58,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:59,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:59,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385090483] [2024-06-21 17:05:59,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385090483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:59,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:59,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:05:59,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055274896] [2024-06-21 17:05:59,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:59,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:05:59,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:59,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:05:59,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:05:59,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:05:59,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 528 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:59,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:59,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:05:59,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:59,804 INFO L124 PetriNetUnfolderBase]: 213/412 cut-off events. [2024-06-21 17:05:59,804 INFO L125 PetriNetUnfolderBase]: For 4174/4174 co-relation queries the response was YES. [2024-06-21 17:05:59,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2008 conditions, 412 events. 213/412 cut-off events. For 4174/4174 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1773 event pairs, 46 based on Foata normal form. 2/411 useless extension candidates. Maximal degree in co-relation 1971. Up to 260 conditions per place. [2024-06-21 17:05:59,806 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 47 selfloop transitions, 31 changer transitions 0/82 dead transitions. [2024-06-21 17:05:59,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 82 transitions, 736 flow [2024-06-21 17:05:59,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:05:59,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:05:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-06-21 17:05:59,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409722222222222 [2024-06-21 17:05:59,807 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 528 flow. Second operand 9 states and 127 transitions. [2024-06-21 17:05:59,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 82 transitions, 736 flow [2024-06-21 17:05:59,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 82 transitions, 687 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:05:59,813 INFO L231 Difference]: Finished difference. Result has 81 places, 68 transitions, 546 flow [2024-06-21 17:05:59,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=546, PETRI_PLACES=81, PETRI_TRANSITIONS=68} [2024-06-21 17:05:59,813 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-06-21 17:05:59,813 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 68 transitions, 546 flow [2024-06-21 17:05:59,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:59,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:59,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:59,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:05:59,814 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:59,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:59,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1448029765, now seen corresponding path program 1 times [2024-06-21 17:05:59,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:59,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843884215] [2024-06-21 17:05:59,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:59,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:00,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:00,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843884215] [2024-06-21 17:06:00,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843884215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:00,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:00,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:00,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062061188] [2024-06-21 17:06:00,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:00,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:00,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:00,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:00,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:00,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:00,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 68 transitions, 546 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:00,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:00,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:00,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:01,084 INFO L124 PetriNetUnfolderBase]: 230/451 cut-off events. [2024-06-21 17:06:01,084 INFO L125 PetriNetUnfolderBase]: For 6183/6183 co-relation queries the response was YES. [2024-06-21 17:06:01,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2117 conditions, 451 events. 230/451 cut-off events. For 6183/6183 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1997 event pairs, 52 based on Foata normal form. 14/462 useless extension candidates. Maximal degree in co-relation 2079. Up to 236 conditions per place. [2024-06-21 17:06:01,087 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 42 selfloop transitions, 35 changer transitions 7/88 dead transitions. [2024-06-21 17:06:01,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 88 transitions, 796 flow [2024-06-21 17:06:01,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:01,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-21 17:06:01,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-21 17:06:01,091 INFO L175 Difference]: Start difference. First operand has 81 places, 68 transitions, 546 flow. Second operand 10 states and 142 transitions. [2024-06-21 17:06:01,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 88 transitions, 796 flow [2024-06-21 17:06:01,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 703 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:01,100 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 527 flow [2024-06-21 17:06:01,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=527, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2024-06-21 17:06:01,100 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-06-21 17:06:01,100 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 527 flow [2024-06-21 17:06:01,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:01,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:01,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:01,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:06:01,101 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:01,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:01,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1139387433, now seen corresponding path program 1 times [2024-06-21 17:06:01,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:01,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278760363] [2024-06-21 17:06:01,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:01,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:01,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:01,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278760363] [2024-06-21 17:06:01,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278760363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:01,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:01,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:06:01,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151414023] [2024-06-21 17:06:01,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:01,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:06:01,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:01,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:06:01,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:06:01,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:01,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 527 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:01,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:01,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:01,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:02,043 INFO L124 PetriNetUnfolderBase]: 222/441 cut-off events. [2024-06-21 17:06:02,044 INFO L125 PetriNetUnfolderBase]: For 4890/4890 co-relation queries the response was YES. [2024-06-21 17:06:02,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2157 conditions, 441 events. 222/441 cut-off events. For 4890/4890 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1958 event pairs, 33 based on Foata normal form. 2/442 useless extension candidates. Maximal degree in co-relation 2118. Up to 353 conditions per place. [2024-06-21 17:06:02,046 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 67 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2024-06-21 17:06:02,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 83 transitions, 733 flow [2024-06-21 17:06:02,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:02,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-21 17:06:02,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41796875 [2024-06-21 17:06:02,048 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 527 flow. Second operand 8 states and 107 transitions. [2024-06-21 17:06:02,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 83 transitions, 733 flow [2024-06-21 17:06:02,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 83 transitions, 654 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 17:06:02,053 INFO L231 Difference]: Finished difference. Result has 82 places, 68 transitions, 486 flow [2024-06-21 17:06:02,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=486, PETRI_PLACES=82, PETRI_TRANSITIONS=68} [2024-06-21 17:06:02,054 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-06-21 17:06:02,054 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 68 transitions, 486 flow [2024-06-21 17:06:02,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:02,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:02,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:02,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:06:02,055 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:02,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:02,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2135025627, now seen corresponding path program 2 times [2024-06-21 17:06:02,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:02,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868780153] [2024-06-21 17:06:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:02,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:02,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:02,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868780153] [2024-06-21 17:06:02,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868780153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:02,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:02,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:06:02,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082339885] [2024-06-21 17:06:02,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:02,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:06:02,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:02,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:06:02,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:06:02,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:02,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 68 transitions, 486 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:02,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:02,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:02,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:03,045 INFO L124 PetriNetUnfolderBase]: 226/453 cut-off events. [2024-06-21 17:06:03,045 INFO L125 PetriNetUnfolderBase]: For 5273/5273 co-relation queries the response was YES. [2024-06-21 17:06:03,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2138 conditions, 453 events. 226/453 cut-off events. For 5273/5273 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2058 event pairs, 53 based on Foata normal form. 2/454 useless extension candidates. Maximal degree in co-relation 2098. Up to 378 conditions per place. [2024-06-21 17:06:03,048 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 66 selfloop transitions, 13 changer transitions 0/83 dead transitions. [2024-06-21 17:06:03,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 83 transitions, 692 flow [2024-06-21 17:06:03,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:03,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2024-06-21 17:06:03,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 17:06:03,049 INFO L175 Difference]: Start difference. First operand has 82 places, 68 transitions, 486 flow. Second operand 8 states and 108 transitions. [2024-06-21 17:06:03,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 83 transitions, 692 flow [2024-06-21 17:06:03,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 655 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:03,055 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 491 flow [2024-06-21 17:06:03,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=491, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2024-06-21 17:06:03,055 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-21 17:06:03,055 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 491 flow [2024-06-21 17:06:03,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:03,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:03,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:03,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:06:03,055 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:03,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:03,056 INFO L85 PathProgramCache]: Analyzing trace with hash 412390527, now seen corresponding path program 1 times [2024-06-21 17:06:03,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:03,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254948817] [2024-06-21 17:06:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:03,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:03,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:03,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254948817] [2024-06-21 17:06:03,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254948817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:03,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:03,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:06:03,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796705506] [2024-06-21 17:06:03,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:03,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:06:03,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:03,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:06:03,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:06:03,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:03,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 491 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:03,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:03,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:03,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:03,976 INFO L124 PetriNetUnfolderBase]: 224/441 cut-off events. [2024-06-21 17:06:03,976 INFO L125 PetriNetUnfolderBase]: For 4951/4951 co-relation queries the response was YES. [2024-06-21 17:06:03,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2088 conditions, 441 events. 224/441 cut-off events. For 4951/4951 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1970 event pairs, 49 based on Foata normal form. 1/438 useless extension candidates. Maximal degree in co-relation 2048. Up to 304 conditions per place. [2024-06-21 17:06:03,979 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 47 selfloop transitions, 30 changer transitions 0/81 dead transitions. [2024-06-21 17:06:03,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 81 transitions, 707 flow [2024-06-21 17:06:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:06:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:06:03,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-21 17:06:03,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2024-06-21 17:06:03,980 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 491 flow. Second operand 7 states and 101 transitions. [2024-06-21 17:06:03,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 81 transitions, 707 flow [2024-06-21 17:06:03,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 81 transitions, 675 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:03,985 INFO L231 Difference]: Finished difference. Result has 84 places, 71 transitions, 552 flow [2024-06-21 17:06:03,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=552, PETRI_PLACES=84, PETRI_TRANSITIONS=71} [2024-06-21 17:06:03,985 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-06-21 17:06:03,985 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 71 transitions, 552 flow [2024-06-21 17:06:03,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:03,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:03,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:03,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:06:03,986 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:03,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:03,986 INFO L85 PathProgramCache]: Analyzing trace with hash -941365089, now seen corresponding path program 3 times [2024-06-21 17:06:03,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:03,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878139514] [2024-06-21 17:06:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:03,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:04,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:04,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878139514] [2024-06-21 17:06:04,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878139514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:04,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:04,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:06:04,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283284380] [2024-06-21 17:06:04,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:04,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:06:04,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:04,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:06:04,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:06:04,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:04,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 71 transitions, 552 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:04,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:04,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:04,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:04,997 INFO L124 PetriNetUnfolderBase]: 228/459 cut-off events. [2024-06-21 17:06:04,997 INFO L125 PetriNetUnfolderBase]: For 5564/5564 co-relation queries the response was YES. [2024-06-21 17:06:05,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2223 conditions, 459 events. 228/459 cut-off events. For 5564/5564 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2039 event pairs, 41 based on Foata normal form. 2/459 useless extension candidates. Maximal degree in co-relation 2182. Up to 392 conditions per place. [2024-06-21 17:06:05,002 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 66 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-21 17:06:05,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 86 transitions, 791 flow [2024-06-21 17:06:05,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:05,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 17:06:05,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 17:06:05,003 INFO L175 Difference]: Start difference. First operand has 84 places, 71 transitions, 552 flow. Second operand 9 states and 114 transitions. [2024-06-21 17:06:05,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 86 transitions, 791 flow [2024-06-21 17:06:05,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 86 transitions, 722 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:05,011 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 593 flow [2024-06-21 17:06:05,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=593, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2024-06-21 17:06:05,012 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 59 predicate places. [2024-06-21 17:06:05,012 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 593 flow [2024-06-21 17:06:05,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:05,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:05,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:05,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:06:05,012 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:05,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:05,012 INFO L85 PathProgramCache]: Analyzing trace with hash 674963257, now seen corresponding path program 4 times [2024-06-21 17:06:05,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:05,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565434017] [2024-06-21 17:06:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:05,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:05,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:05,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565434017] [2024-06-21 17:06:05,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565434017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:05,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:05,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:06:05,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061968044] [2024-06-21 17:06:05,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:05,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:06:05,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:05,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:06:05,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:06:05,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:05,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 593 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:05,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:05,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:05,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:06,024 INFO L124 PetriNetUnfolderBase]: 236/474 cut-off events. [2024-06-21 17:06:06,024 INFO L125 PetriNetUnfolderBase]: For 6186/6186 co-relation queries the response was YES. [2024-06-21 17:06:06,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 474 events. 236/474 cut-off events. For 6186/6186 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2154 event pairs, 42 based on Foata normal form. 4/474 useless extension candidates. Maximal degree in co-relation 2251. Up to 344 conditions per place. [2024-06-21 17:06:06,027 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 64 selfloop transitions, 24 changer transitions 0/92 dead transitions. [2024-06-21 17:06:06,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 92 transitions, 849 flow [2024-06-21 17:06:06,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2024-06-21 17:06:06,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4296875 [2024-06-21 17:06:06,029 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 593 flow. Second operand 8 states and 110 transitions. [2024-06-21 17:06:06,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 92 transitions, 849 flow [2024-06-21 17:06:06,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 92 transitions, 806 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 17:06:06,036 INFO L231 Difference]: Finished difference. Result has 95 places, 82 transitions, 660 flow [2024-06-21 17:06:06,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=660, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2024-06-21 17:06:06,037 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 64 predicate places. [2024-06-21 17:06:06,037 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 660 flow [2024-06-21 17:06:06,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:06,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:06,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:06,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:06:06,038 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:06,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:06,038 INFO L85 PathProgramCache]: Analyzing trace with hash 43224603, now seen corresponding path program 1 times [2024-06-21 17:06:06,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:06,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594270642] [2024-06-21 17:06:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:06,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:06,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:06,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594270642] [2024-06-21 17:06:06,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594270642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:06,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:06,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:06,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128113874] [2024-06-21 17:06:06,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:06,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:06,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:06,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:06,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:06,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:06,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 660 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:06,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:06,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:06,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:07,085 INFO L124 PetriNetUnfolderBase]: 242/484 cut-off events. [2024-06-21 17:06:07,085 INFO L125 PetriNetUnfolderBase]: For 6487/6487 co-relation queries the response was YES. [2024-06-21 17:06:07,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2420 conditions, 484 events. 242/484 cut-off events. For 6487/6487 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2202 event pairs, 39 based on Foata normal form. 2/484 useless extension candidates. Maximal degree in co-relation 2374. Up to 320 conditions per place. [2024-06-21 17:06:07,088 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 59 selfloop transitions, 34 changer transitions 0/97 dead transitions. [2024-06-21 17:06:07,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 97 transitions, 946 flow [2024-06-21 17:06:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:07,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-21 17:06:07,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:06:07,089 INFO L175 Difference]: Start difference. First operand has 95 places, 82 transitions, 660 flow. Second operand 9 states and 126 transitions. [2024-06-21 17:06:07,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 97 transitions, 946 flow [2024-06-21 17:06:07,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 97 transitions, 879 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:06:07,099 INFO L231 Difference]: Finished difference. Result has 99 places, 85 transitions, 707 flow [2024-06-21 17:06:07,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=707, PETRI_PLACES=99, PETRI_TRANSITIONS=85} [2024-06-21 17:06:07,099 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2024-06-21 17:06:07,100 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 85 transitions, 707 flow [2024-06-21 17:06:07,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:07,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:07,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:07,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:06:07,100 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:07,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:07,100 INFO L85 PathProgramCache]: Analyzing trace with hash 799685313, now seen corresponding path program 2 times [2024-06-21 17:06:07,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:07,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372579700] [2024-06-21 17:06:07,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:07,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:07,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:07,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372579700] [2024-06-21 17:06:07,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372579700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:07,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:07,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:07,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258178544] [2024-06-21 17:06:07,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:07,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:07,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:07,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:07,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:08,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:08,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 85 transitions, 707 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:08,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:08,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:08,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:08,328 INFO L124 PetriNetUnfolderBase]: 245/501 cut-off events. [2024-06-21 17:06:08,329 INFO L125 PetriNetUnfolderBase]: For 6626/6626 co-relation queries the response was YES. [2024-06-21 17:06:08,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2526 conditions, 501 events. 245/501 cut-off events. For 6626/6626 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2364 event pairs, 33 based on Foata normal form. 1/500 useless extension candidates. Maximal degree in co-relation 2479. Up to 380 conditions per place. [2024-06-21 17:06:08,332 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 74 selfloop transitions, 30 changer transitions 2/110 dead transitions. [2024-06-21 17:06:08,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 110 transitions, 1101 flow [2024-06-21 17:06:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-21 17:06:08,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 17:06:08,335 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 707 flow. Second operand 10 states and 133 transitions. [2024-06-21 17:06:08,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 110 transitions, 1101 flow [2024-06-21 17:06:08,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 110 transitions, 1000 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:08,346 INFO L231 Difference]: Finished difference. Result has 106 places, 98 transitions, 854 flow [2024-06-21 17:06:08,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=854, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2024-06-21 17:06:08,346 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2024-06-21 17:06:08,347 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 854 flow [2024-06-21 17:06:08,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:08,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:08,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:08,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:06:08,347 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:08,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:08,348 INFO L85 PathProgramCache]: Analyzing trace with hash 338799993, now seen corresponding path program 3 times [2024-06-21 17:06:08,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:08,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318526313] [2024-06-21 17:06:08,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:08,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:09,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:09,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318526313] [2024-06-21 17:06:09,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318526313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:09,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:09,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:09,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770255229] [2024-06-21 17:06:09,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:09,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:09,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:09,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:09,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:09,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:09,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 854 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:09,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:09,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:09,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:09,587 INFO L124 PetriNetUnfolderBase]: 237/483 cut-off events. [2024-06-21 17:06:09,587 INFO L125 PetriNetUnfolderBase]: For 7069/7069 co-relation queries the response was YES. [2024-06-21 17:06:09,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2531 conditions, 483 events. 237/483 cut-off events. For 7069/7069 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2253 event pairs, 29 based on Foata normal form. 1/482 useless extension candidates. Maximal degree in co-relation 2479. Up to 350 conditions per place. [2024-06-21 17:06:09,590 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 75 selfloop transitions, 36 changer transitions 2/117 dead transitions. [2024-06-21 17:06:09,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 117 transitions, 1246 flow [2024-06-21 17:06:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:09,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 17:06:09,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-21 17:06:09,591 INFO L175 Difference]: Start difference. First operand has 106 places, 98 transitions, 854 flow. Second operand 11 states and 145 transitions. [2024-06-21 17:06:09,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 117 transitions, 1246 flow [2024-06-21 17:06:09,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 117 transitions, 1112 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-21 17:06:09,604 INFO L231 Difference]: Finished difference. Result has 114 places, 103 transitions, 878 flow [2024-06-21 17:06:09,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=878, PETRI_PLACES=114, PETRI_TRANSITIONS=103} [2024-06-21 17:06:09,605 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2024-06-21 17:06:09,605 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 103 transitions, 878 flow [2024-06-21 17:06:09,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:09,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:09,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:09,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:06:09,605 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:09,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:09,605 INFO L85 PathProgramCache]: Analyzing trace with hash 338443803, now seen corresponding path program 4 times [2024-06-21 17:06:09,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:09,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561762931] [2024-06-21 17:06:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:09,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:10,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:10,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561762931] [2024-06-21 17:06:10,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561762931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:10,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:10,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:10,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571197818] [2024-06-21 17:06:10,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:10,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:10,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:10,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:10,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:10,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:10,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 103 transitions, 878 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:10,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:10,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:10,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:10,922 INFO L124 PetriNetUnfolderBase]: 232/471 cut-off events. [2024-06-21 17:06:10,922 INFO L125 PetriNetUnfolderBase]: For 6793/6793 co-relation queries the response was YES. [2024-06-21 17:06:10,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2432 conditions, 471 events. 232/471 cut-off events. For 6793/6793 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2157 event pairs, 29 based on Foata normal form. 1/470 useless extension candidates. Maximal degree in co-relation 2379. Up to 352 conditions per place. [2024-06-21 17:06:10,932 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 78 selfloop transitions, 31 changer transitions 0/113 dead transitions. [2024-06-21 17:06:10,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 113 transitions, 1123 flow [2024-06-21 17:06:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:10,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:10,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-21 17:06:10,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-21 17:06:10,933 INFO L175 Difference]: Start difference. First operand has 114 places, 103 transitions, 878 flow. Second operand 10 states and 131 transitions. [2024-06-21 17:06:10,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 113 transitions, 1123 flow [2024-06-21 17:06:10,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 113 transitions, 1071 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 17:06:10,945 INFO L231 Difference]: Finished difference. Result has 119 places, 103 transitions, 893 flow [2024-06-21 17:06:10,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=893, PETRI_PLACES=119, PETRI_TRANSITIONS=103} [2024-06-21 17:06:10,950 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 88 predicate places. [2024-06-21 17:06:10,950 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 103 transitions, 893 flow [2024-06-21 17:06:10,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:10,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:10,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:10,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:06:10,951 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:10,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:10,951 INFO L85 PathProgramCache]: Analyzing trace with hash 521621305, now seen corresponding path program 5 times [2024-06-21 17:06:10,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:10,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069689004] [2024-06-21 17:06:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:10,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:11,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:11,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069689004] [2024-06-21 17:06:11,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069689004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:11,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:11,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:06:11,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018856936] [2024-06-21 17:06:11,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:11,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:06:11,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:11,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:06:11,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:06:11,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:11,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 103 transitions, 893 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:11,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:11,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:11,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:11,839 INFO L124 PetriNetUnfolderBase]: 229/464 cut-off events. [2024-06-21 17:06:11,839 INFO L125 PetriNetUnfolderBase]: For 6956/6956 co-relation queries the response was YES. [2024-06-21 17:06:11,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2410 conditions, 464 events. 229/464 cut-off events. For 6956/6956 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2095 event pairs, 25 based on Foata normal form. 2/465 useless extension candidates. Maximal degree in co-relation 2355. Up to 390 conditions per place. [2024-06-21 17:06:11,841 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 96 selfloop transitions, 16 changer transitions 0/116 dead transitions. [2024-06-21 17:06:11,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 116 transitions, 1160 flow [2024-06-21 17:06:11,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:11,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-21 17:06:11,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 17:06:11,842 INFO L175 Difference]: Start difference. First operand has 119 places, 103 transitions, 893 flow. Second operand 9 states and 117 transitions. [2024-06-21 17:06:11,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 116 transitions, 1160 flow [2024-06-21 17:06:11,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 116 transitions, 1088 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:11,853 INFO L231 Difference]: Finished difference. Result has 120 places, 104 transitions, 875 flow [2024-06-21 17:06:11,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=875, PETRI_PLACES=120, PETRI_TRANSITIONS=104} [2024-06-21 17:06:11,853 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2024-06-21 17:06:11,853 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 104 transitions, 875 flow [2024-06-21 17:06:11,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:11,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:11,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:11,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:06:11,854 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:11,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:11,854 INFO L85 PathProgramCache]: Analyzing trace with hash -101658072, now seen corresponding path program 1 times [2024-06-21 17:06:11,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:11,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597149092] [2024-06-21 17:06:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:11,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:12,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:12,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597149092] [2024-06-21 17:06:12,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597149092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:12,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:12,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:06:12,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545358852] [2024-06-21 17:06:12,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:12,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:06:12,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:12,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:06:12,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:06:12,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:12,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 104 transitions, 875 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:12,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:12,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:12,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:12,746 INFO L124 PetriNetUnfolderBase]: 236/471 cut-off events. [2024-06-21 17:06:12,746 INFO L125 PetriNetUnfolderBase]: For 7712/7712 co-relation queries the response was YES. [2024-06-21 17:06:12,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2444 conditions, 471 events. 236/471 cut-off events. For 7712/7712 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2164 event pairs, 37 based on Foata normal form. 2/470 useless extension candidates. Maximal degree in co-relation 2387. Up to 362 conditions per place. [2024-06-21 17:06:12,748 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 85 selfloop transitions, 26 changer transitions 0/115 dead transitions. [2024-06-21 17:06:12,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 115 transitions, 1142 flow [2024-06-21 17:06:12,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:12,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 17:06:12,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140625 [2024-06-21 17:06:12,749 INFO L175 Difference]: Start difference. First operand has 120 places, 104 transitions, 875 flow. Second operand 8 states and 106 transitions. [2024-06-21 17:06:12,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 115 transitions, 1142 flow [2024-06-21 17:06:12,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 115 transitions, 1078 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:12,761 INFO L231 Difference]: Finished difference. Result has 121 places, 107 transitions, 896 flow [2024-06-21 17:06:12,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=896, PETRI_PLACES=121, PETRI_TRANSITIONS=107} [2024-06-21 17:06:12,761 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 90 predicate places. [2024-06-21 17:06:12,762 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 107 transitions, 896 flow [2024-06-21 17:06:12,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:12,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:12,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:12,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:06:12,762 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:12,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:12,762 INFO L85 PathProgramCache]: Analyzing trace with hash -961271222, now seen corresponding path program 2 times [2024-06-21 17:06:12,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:12,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8332792] [2024-06-21 17:06:12,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:12,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:13,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:13,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8332792] [2024-06-21 17:06:13,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8332792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:13,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:13,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:06:13,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430232770] [2024-06-21 17:06:13,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:13,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:06:13,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:13,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:06:13,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:06:13,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:13,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 107 transitions, 896 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:13,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:13,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:13,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:13,611 INFO L124 PetriNetUnfolderBase]: 240/477 cut-off events. [2024-06-21 17:06:13,611 INFO L125 PetriNetUnfolderBase]: For 8069/8069 co-relation queries the response was YES. [2024-06-21 17:06:13,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 477 events. 240/477 cut-off events. For 8069/8069 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2197 event pairs, 21 based on Foata normal form. 2/474 useless extension candidates. Maximal degree in co-relation 2415. Up to 377 conditions per place. [2024-06-21 17:06:13,614 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 104 selfloop transitions, 10 changer transitions 0/118 dead transitions. [2024-06-21 17:06:13,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 118 transitions, 1160 flow [2024-06-21 17:06:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:06:13,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:06:13,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-21 17:06:13,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:06:13,615 INFO L175 Difference]: Start difference. First operand has 121 places, 107 transitions, 896 flow. Second operand 7 states and 92 transitions. [2024-06-21 17:06:13,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 118 transitions, 1160 flow [2024-06-21 17:06:13,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 118 transitions, 1111 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 17:06:13,626 INFO L231 Difference]: Finished difference. Result has 123 places, 108 transitions, 883 flow [2024-06-21 17:06:13,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=883, PETRI_PLACES=123, PETRI_TRANSITIONS=108} [2024-06-21 17:06:13,627 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 92 predicate places. [2024-06-21 17:06:13,627 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 108 transitions, 883 flow [2024-06-21 17:06:13,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:13,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:13,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:13,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:06:13,627 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:13,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:13,628 INFO L85 PathProgramCache]: Analyzing trace with hash 671906856, now seen corresponding path program 3 times [2024-06-21 17:06:13,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:13,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778139490] [2024-06-21 17:06:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:13,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:14,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:14,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778139490] [2024-06-21 17:06:14,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778139490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:14,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:14,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:06:14,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068677264] [2024-06-21 17:06:14,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:14,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:06:14,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:14,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:06:14,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:06:14,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:14,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 108 transitions, 883 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:14,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:14,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:14,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:14,551 INFO L124 PetriNetUnfolderBase]: 244/485 cut-off events. [2024-06-21 17:06:14,551 INFO L125 PetriNetUnfolderBase]: For 8585/8585 co-relation queries the response was YES. [2024-06-21 17:06:14,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2497 conditions, 485 events. 244/485 cut-off events. For 8585/8585 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2240 event pairs, 38 based on Foata normal form. 2/482 useless extension candidates. Maximal degree in co-relation 2440. Up to 299 conditions per place. [2024-06-21 17:06:14,554 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 87 selfloop transitions, 28 changer transitions 0/119 dead transitions. [2024-06-21 17:06:14,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 119 transitions, 1207 flow [2024-06-21 17:06:14,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:06:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:06:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-21 17:06:14,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:06:14,554 INFO L175 Difference]: Start difference. First operand has 123 places, 108 transitions, 883 flow. Second operand 7 states and 98 transitions. [2024-06-21 17:06:14,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 119 transitions, 1207 flow [2024-06-21 17:06:14,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 119 transitions, 1181 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:06:14,581 INFO L231 Difference]: Finished difference. Result has 125 places, 109 transitions, 932 flow [2024-06-21 17:06:14,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=932, PETRI_PLACES=125, PETRI_TRANSITIONS=109} [2024-06-21 17:06:14,582 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 94 predicate places. [2024-06-21 17:06:14,582 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 109 transitions, 932 flow [2024-06-21 17:06:14,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:14,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:14,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:14,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:06:14,582 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:14,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:14,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1614053190, now seen corresponding path program 4 times [2024-06-21 17:06:14,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:14,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648281613] [2024-06-21 17:06:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:14,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:15,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:15,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648281613] [2024-06-21 17:06:15,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648281613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:15,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:15,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:06:15,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296465884] [2024-06-21 17:06:15,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:15,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:06:15,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:15,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:06:15,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:06:15,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:15,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 109 transitions, 932 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:15,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:15,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:15,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:15,450 INFO L124 PetriNetUnfolderBase]: 241/480 cut-off events. [2024-06-21 17:06:15,450 INFO L125 PetriNetUnfolderBase]: For 8605/8605 co-relation queries the response was YES. [2024-06-21 17:06:15,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2480 conditions, 480 events. 241/480 cut-off events. For 8605/8605 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2242 event pairs, 39 based on Foata normal form. 2/477 useless extension candidates. Maximal degree in co-relation 2422. Up to 347 conditions per place. [2024-06-21 17:06:15,453 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 82 selfloop transitions, 31 changer transitions 0/117 dead transitions. [2024-06-21 17:06:15,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 117 transitions, 1180 flow [2024-06-21 17:06:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:06:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:06:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-21 17:06:15,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:06:15,454 INFO L175 Difference]: Start difference. First operand has 125 places, 109 transitions, 932 flow. Second operand 7 states and 98 transitions. [2024-06-21 17:06:15,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 117 transitions, 1180 flow [2024-06-21 17:06:15,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 117 transitions, 1127 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 17:06:15,468 INFO L231 Difference]: Finished difference. Result has 128 places, 109 transitions, 948 flow [2024-06-21 17:06:15,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=948, PETRI_PLACES=128, PETRI_TRANSITIONS=109} [2024-06-21 17:06:15,469 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 97 predicate places. [2024-06-21 17:06:15,469 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 109 transitions, 948 flow [2024-06-21 17:06:15,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:15,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:15,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:15,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:06:15,469 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:15,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:15,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1614059142, now seen corresponding path program 1 times [2024-06-21 17:06:15,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:15,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286890201] [2024-06-21 17:06:15,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:15,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:16,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:16,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286890201] [2024-06-21 17:06:16,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286890201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:16,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:16,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:16,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639748724] [2024-06-21 17:06:16,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:16,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:16,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:16,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:16,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:16,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:16,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 109 transitions, 948 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:16,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:16,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:16,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:16,354 INFO L124 PetriNetUnfolderBase]: 239/477 cut-off events. [2024-06-21 17:06:16,355 INFO L125 PetriNetUnfolderBase]: For 8117/8117 co-relation queries the response was YES. [2024-06-21 17:06:16,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2453 conditions, 477 events. 239/477 cut-off events. For 8117/8117 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2216 event pairs, 38 based on Foata normal form. 1/473 useless extension candidates. Maximal degree in co-relation 2394. Up to 297 conditions per place. [2024-06-21 17:06:16,357 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 68 selfloop transitions, 47 changer transitions 0/119 dead transitions. [2024-06-21 17:06:16,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 119 transitions, 1224 flow [2024-06-21 17:06:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:16,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:16,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-21 17:06:16,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453125 [2024-06-21 17:06:16,358 INFO L175 Difference]: Start difference. First operand has 128 places, 109 transitions, 948 flow. Second operand 8 states and 114 transitions. [2024-06-21 17:06:16,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 119 transitions, 1224 flow [2024-06-21 17:06:16,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 119 transitions, 1149 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:16,372 INFO L231 Difference]: Finished difference. Result has 130 places, 111 transitions, 1003 flow [2024-06-21 17:06:16,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1003, PETRI_PLACES=130, PETRI_TRANSITIONS=111} [2024-06-21 17:06:16,373 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 99 predicate places. [2024-06-21 17:06:16,373 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 111 transitions, 1003 flow [2024-06-21 17:06:16,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:16,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:16,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:16,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:06:16,373 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:16,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:16,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1339963650, now seen corresponding path program 1 times [2024-06-21 17:06:16,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:16,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433218964] [2024-06-21 17:06:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:16,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:17,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:17,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433218964] [2024-06-21 17:06:17,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433218964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:17,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:17,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:17,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466894260] [2024-06-21 17:06:17,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:17,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:17,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:17,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:17,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:17,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:17,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 111 transitions, 1003 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:17,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:17,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:17,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:17,657 INFO L124 PetriNetUnfolderBase]: 259/523 cut-off events. [2024-06-21 17:06:17,657 INFO L125 PetriNetUnfolderBase]: For 12953/12953 co-relation queries the response was YES. [2024-06-21 17:06:17,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2671 conditions, 523 events. 259/523 cut-off events. For 12953/12953 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2476 event pairs, 41 based on Foata normal form. 12/532 useless extension candidates. Maximal degree in co-relation 2611. Up to 311 conditions per place. [2024-06-21 17:06:17,660 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 79 selfloop transitions, 36 changer transitions 8/127 dead transitions. [2024-06-21 17:06:17,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 127 transitions, 1336 flow [2024-06-21 17:06:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-06-21 17:06:17,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 17:06:17,661 INFO L175 Difference]: Start difference. First operand has 130 places, 111 transitions, 1003 flow. Second operand 10 states and 141 transitions. [2024-06-21 17:06:17,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 127 transitions, 1336 flow [2024-06-21 17:06:17,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 127 transitions, 1227 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:17,680 INFO L231 Difference]: Finished difference. Result has 133 places, 109 transitions, 966 flow [2024-06-21 17:06:17,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=966, PETRI_PLACES=133, PETRI_TRANSITIONS=109} [2024-06-21 17:06:17,680 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 102 predicate places. [2024-06-21 17:06:17,680 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 109 transitions, 966 flow [2024-06-21 17:06:17,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:17,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:17,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:17,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:06:17,681 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:17,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:17,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1901824258, now seen corresponding path program 2 times [2024-06-21 17:06:17,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:17,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929272161] [2024-06-21 17:06:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:17,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:18,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:18,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929272161] [2024-06-21 17:06:18,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929272161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:18,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:18,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:18,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735056832] [2024-06-21 17:06:18,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:18,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:18,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:18,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:18,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:18,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:18,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 109 transitions, 966 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:18,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:18,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:18,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:18,977 INFO L124 PetriNetUnfolderBase]: 259/527 cut-off events. [2024-06-21 17:06:18,977 INFO L125 PetriNetUnfolderBase]: For 13535/13535 co-relation queries the response was YES. [2024-06-21 17:06:18,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2686 conditions, 527 events. 259/527 cut-off events. For 13535/13535 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2518 event pairs, 39 based on Foata normal form. 13/537 useless extension candidates. Maximal degree in co-relation 2626. Up to 315 conditions per place. [2024-06-21 17:06:18,980 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 75 selfloop transitions, 39 changer transitions 9/127 dead transitions. [2024-06-21 17:06:18,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 127 transitions, 1322 flow [2024-06-21 17:06:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 152 transitions. [2024-06-21 17:06:18,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 17:06:18,981 INFO L175 Difference]: Start difference. First operand has 133 places, 109 transitions, 966 flow. Second operand 11 states and 152 transitions. [2024-06-21 17:06:18,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 127 transitions, 1322 flow [2024-06-21 17:06:18,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 127 transitions, 1229 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:18,996 INFO L231 Difference]: Finished difference. Result has 136 places, 107 transitions, 961 flow [2024-06-21 17:06:18,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=961, PETRI_PLACES=136, PETRI_TRANSITIONS=107} [2024-06-21 17:06:18,996 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 105 predicate places. [2024-06-21 17:06:18,996 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 107 transitions, 961 flow [2024-06-21 17:06:18,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:18,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:18,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:18,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:06:18,997 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:18,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:18,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1912866148, now seen corresponding path program 3 times [2024-06-21 17:06:18,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:18,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423617648] [2024-06-21 17:06:18,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:18,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:19,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:19,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423617648] [2024-06-21 17:06:19,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423617648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:19,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:19,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:19,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696498079] [2024-06-21 17:06:19,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:19,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:19,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:19,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:19,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:20,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:20,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 107 transitions, 961 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:20,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:20,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:20,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:20,356 INFO L124 PetriNetUnfolderBase]: 239/485 cut-off events. [2024-06-21 17:06:20,356 INFO L125 PetriNetUnfolderBase]: For 9662/9662 co-relation queries the response was YES. [2024-06-21 17:06:20,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2555 conditions, 485 events. 239/485 cut-off events. For 9662/9662 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2291 event pairs, 35 based on Foata normal form. 2/484 useless extension candidates. Maximal degree in co-relation 2494. Up to 308 conditions per place. [2024-06-21 17:06:20,359 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 71 selfloop transitions, 45 changer transitions 0/120 dead transitions. [2024-06-21 17:06:20,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 120 transitions, 1235 flow [2024-06-21 17:06:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:06:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:06:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 156 transitions. [2024-06-21 17:06:20,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 17:06:20,360 INFO L175 Difference]: Start difference. First operand has 136 places, 107 transitions, 961 flow. Second operand 12 states and 156 transitions. [2024-06-21 17:06:20,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 120 transitions, 1235 flow [2024-06-21 17:06:20,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 120 transitions, 1140 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 17:06:20,378 INFO L231 Difference]: Finished difference. Result has 137 places, 108 transitions, 980 flow [2024-06-21 17:06:20,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=980, PETRI_PLACES=137, PETRI_TRANSITIONS=108} [2024-06-21 17:06:20,379 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 106 predicate places. [2024-06-21 17:06:20,379 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 108 transitions, 980 flow [2024-06-21 17:06:20,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:20,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:20,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:20,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:06:20,379 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:20,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:20,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1588125028, now seen corresponding path program 4 times [2024-06-21 17:06:20,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:20,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893618600] [2024-06-21 17:06:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:20,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:21,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:21,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893618600] [2024-06-21 17:06:21,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893618600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:21,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:21,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:21,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593392088] [2024-06-21 17:06:21,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:21,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:21,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:21,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:21,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:21,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:21,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 108 transitions, 980 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:21,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:21,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:21,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:21,761 INFO L124 PetriNetUnfolderBase]: 262/536 cut-off events. [2024-06-21 17:06:21,761 INFO L125 PetriNetUnfolderBase]: For 15092/15092 co-relation queries the response was YES. [2024-06-21 17:06:21,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2793 conditions, 536 events. 262/536 cut-off events. For 15092/15092 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2578 event pairs, 41 based on Foata normal form. 13/546 useless extension candidates. Maximal degree in co-relation 2732. Up to 327 conditions per place. [2024-06-21 17:06:21,764 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 75 selfloop transitions, 37 changer transitions 10/126 dead transitions. [2024-06-21 17:06:21,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 126 transitions, 1346 flow [2024-06-21 17:06:21,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:21,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 155 transitions. [2024-06-21 17:06:21,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-21 17:06:21,765 INFO L175 Difference]: Start difference. First operand has 137 places, 108 transitions, 980 flow. Second operand 11 states and 155 transitions. [2024-06-21 17:06:21,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 126 transitions, 1346 flow [2024-06-21 17:06:21,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 126 transitions, 1242 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 17:06:21,781 INFO L231 Difference]: Finished difference. Result has 139 places, 105 transitions, 955 flow [2024-06-21 17:06:21,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=955, PETRI_PLACES=139, PETRI_TRANSITIONS=105} [2024-06-21 17:06:21,782 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 108 predicate places. [2024-06-21 17:06:21,782 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 105 transitions, 955 flow [2024-06-21 17:06:21,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:21,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:21,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:21,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:06:21,782 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:21,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:21,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1913252098, now seen corresponding path program 5 times [2024-06-21 17:06:21,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:21,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336582379] [2024-06-21 17:06:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:21,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:22,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:22,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336582379] [2024-06-21 17:06:22,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336582379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:22,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:22,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:22,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713962483] [2024-06-21 17:06:22,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:22,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:22,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:22,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:22,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:22,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:22,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 105 transitions, 955 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:22,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:22,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:22,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:23,042 INFO L124 PetriNetUnfolderBase]: 233/481 cut-off events. [2024-06-21 17:06:23,042 INFO L125 PetriNetUnfolderBase]: For 9051/9051 co-relation queries the response was YES. [2024-06-21 17:06:23,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2470 conditions, 481 events. 233/481 cut-off events. For 9051/9051 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2287 event pairs, 34 based on Foata normal form. 2/480 useless extension candidates. Maximal degree in co-relation 2407. Up to 287 conditions per place. [2024-06-21 17:06:23,044 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 69 selfloop transitions, 45 changer transitions 0/118 dead transitions. [2024-06-21 17:06:23,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 118 transitions, 1211 flow [2024-06-21 17:06:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:06:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:06:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 156 transitions. [2024-06-21 17:06:23,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 17:06:23,046 INFO L175 Difference]: Start difference. First operand has 139 places, 105 transitions, 955 flow. Second operand 12 states and 156 transitions. [2024-06-21 17:06:23,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 118 transitions, 1211 flow [2024-06-21 17:06:23,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 118 transitions, 1109 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-06-21 17:06:23,061 INFO L231 Difference]: Finished difference. Result has 138 places, 105 transitions, 947 flow [2024-06-21 17:06:23,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=947, PETRI_PLACES=138, PETRI_TRANSITIONS=105} [2024-06-21 17:06:23,061 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 107 predicate places. [2024-06-21 17:06:23,061 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 105 transitions, 947 flow [2024-06-21 17:06:23,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:23,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:23,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:23,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:06:23,062 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:23,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:23,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1761954002, now seen corresponding path program 1 times [2024-06-21 17:06:23,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:23,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547467028] [2024-06-21 17:06:23,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:23,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:23,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:23,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547467028] [2024-06-21 17:06:23,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547467028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:23,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:23,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:23,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466123488] [2024-06-21 17:06:23,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:23,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:23,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:23,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:23,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:23,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:23,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 105 transitions, 947 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:23,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:23,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:23,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:23,937 INFO L124 PetriNetUnfolderBase]: 237/485 cut-off events. [2024-06-21 17:06:23,937 INFO L125 PetriNetUnfolderBase]: For 9047/9047 co-relation queries the response was YES. [2024-06-21 17:06:23,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2471 conditions, 485 events. 237/485 cut-off events. For 9047/9047 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2302 event pairs, 21 based on Foata normal form. 2/482 useless extension candidates. Maximal degree in co-relation 2410. Up to 379 conditions per place. [2024-06-21 17:06:23,940 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 103 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2024-06-21 17:06:23,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 118 transitions, 1211 flow [2024-06-21 17:06:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:23,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2024-06-21 17:06:23,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40234375 [2024-06-21 17:06:23,940 INFO L175 Difference]: Start difference. First operand has 138 places, 105 transitions, 947 flow. Second operand 8 states and 103 transitions. [2024-06-21 17:06:23,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 118 transitions, 1211 flow [2024-06-21 17:06:23,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 118 transitions, 1091 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-21 17:06:23,955 INFO L231 Difference]: Finished difference. Result has 135 places, 106 transitions, 861 flow [2024-06-21 17:06:23,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=861, PETRI_PLACES=135, PETRI_TRANSITIONS=106} [2024-06-21 17:06:23,955 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 104 predicate places. [2024-06-21 17:06:23,955 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 106 transitions, 861 flow [2024-06-21 17:06:23,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:23,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:23,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:23,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:06:23,955 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:23,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:23,956 INFO L85 PathProgramCache]: Analyzing trace with hash -645723080, now seen corresponding path program 2 times [2024-06-21 17:06:23,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:23,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130115144] [2024-06-21 17:06:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:23,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:24,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:24,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130115144] [2024-06-21 17:06:24,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130115144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:24,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:24,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:24,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558325383] [2024-06-21 17:06:24,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:24,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:24,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:24,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:24,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:24,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:24,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 106 transitions, 861 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:24,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:24,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:24,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:24,917 INFO L124 PetriNetUnfolderBase]: 241/495 cut-off events. [2024-06-21 17:06:24,917 INFO L125 PetriNetUnfolderBase]: For 9195/9195 co-relation queries the response was YES. [2024-06-21 17:06:24,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2379 conditions, 495 events. 241/495 cut-off events. For 9195/9195 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2374 event pairs, 37 based on Foata normal form. 2/492 useless extension candidates. Maximal degree in co-relation 2318. Up to 247 conditions per place. [2024-06-21 17:06:24,920 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 86 selfloop transitions, 29 changer transitions 1/120 dead transitions. [2024-06-21 17:06:24,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 120 transitions, 1210 flow [2024-06-21 17:06:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:24,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:24,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-06-21 17:06:24,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43359375 [2024-06-21 17:06:24,929 INFO L175 Difference]: Start difference. First operand has 135 places, 106 transitions, 861 flow. Second operand 8 states and 111 transitions. [2024-06-21 17:06:24,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 120 transitions, 1210 flow [2024-06-21 17:06:24,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 120 transitions, 1186 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:24,946 INFO L231 Difference]: Finished difference. Result has 137 places, 107 transitions, 907 flow [2024-06-21 17:06:24,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=907, PETRI_PLACES=137, PETRI_TRANSITIONS=107} [2024-06-21 17:06:24,947 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 106 predicate places. [2024-06-21 17:06:24,947 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 107 transitions, 907 flow [2024-06-21 17:06:24,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:24,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:24,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:24,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:06:24,947 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:24,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:24,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1503957798, now seen corresponding path program 3 times [2024-06-21 17:06:24,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:24,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544708208] [2024-06-21 17:06:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:24,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:25,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:25,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544708208] [2024-06-21 17:06:25,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544708208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:25,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:25,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:25,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830909825] [2024-06-21 17:06:25,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:25,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:25,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:25,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:25,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:25,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:25,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 107 transitions, 907 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:25,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:25,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:25,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:25,930 INFO L124 PetriNetUnfolderBase]: 269/549 cut-off events. [2024-06-21 17:06:25,930 INFO L125 PetriNetUnfolderBase]: For 11154/11154 co-relation queries the response was YES. [2024-06-21 17:06:25,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2727 conditions, 549 events. 269/549 cut-off events. For 11154/11154 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2714 event pairs, 40 based on Foata normal form. 2/548 useless extension candidates. Maximal degree in co-relation 2665. Up to 452 conditions per place. [2024-06-21 17:06:25,933 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 106 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-06-21 17:06:25,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 130 transitions, 1355 flow [2024-06-21 17:06:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-21 17:06:25,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:06:25,935 INFO L175 Difference]: Start difference. First operand has 137 places, 107 transitions, 907 flow. Second operand 10 states and 128 transitions. [2024-06-21 17:06:25,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 130 transitions, 1355 flow [2024-06-21 17:06:25,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 130 transitions, 1292 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:06:25,961 INFO L231 Difference]: Finished difference. Result has 146 places, 117 transitions, 1011 flow [2024-06-21 17:06:25,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1011, PETRI_PLACES=146, PETRI_TRANSITIONS=117} [2024-06-21 17:06:25,962 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 115 predicate places. [2024-06-21 17:06:25,962 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 117 transitions, 1011 flow [2024-06-21 17:06:25,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:25,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:25,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:25,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:06:25,962 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:25,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:25,962 INFO L85 PathProgramCache]: Analyzing trace with hash 988346158, now seen corresponding path program 4 times [2024-06-21 17:06:25,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:25,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615341276] [2024-06-21 17:06:25,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:25,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:26,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:26,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615341276] [2024-06-21 17:06:26,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615341276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:26,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:26,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:26,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134165035] [2024-06-21 17:06:26,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:26,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:26,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:26,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:26,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:26,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:26,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 117 transitions, 1011 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:26,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:26,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:26,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:26,926 INFO L124 PetriNetUnfolderBase]: 270/550 cut-off events. [2024-06-21 17:06:26,927 INFO L125 PetriNetUnfolderBase]: For 11904/11904 co-relation queries the response was YES. [2024-06-21 17:06:26,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2688 conditions, 550 events. 270/550 cut-off events. For 11904/11904 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2720 event pairs, 43 based on Foata normal form. 4/549 useless extension candidates. Maximal degree in co-relation 2621. Up to 375 conditions per place. [2024-06-21 17:06:26,930 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 78 selfloop transitions, 45 changer transitions 1/128 dead transitions. [2024-06-21 17:06:26,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 128 transitions, 1303 flow [2024-06-21 17:06:26,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:26,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-21 17:06:26,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:06:26,931 INFO L175 Difference]: Start difference. First operand has 146 places, 117 transitions, 1011 flow. Second operand 8 states and 112 transitions. [2024-06-21 17:06:26,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 128 transitions, 1303 flow [2024-06-21 17:06:26,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 128 transitions, 1270 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 17:06:26,953 INFO L231 Difference]: Finished difference. Result has 151 places, 118 transitions, 1086 flow [2024-06-21 17:06:26,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1086, PETRI_PLACES=151, PETRI_TRANSITIONS=118} [2024-06-21 17:06:26,953 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 120 predicate places. [2024-06-21 17:06:26,953 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 118 transitions, 1086 flow [2024-06-21 17:06:26,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:26,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:26,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:26,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:06:26,954 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:26,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:26,954 INFO L85 PathProgramCache]: Analyzing trace with hash 801662576, now seen corresponding path program 5 times [2024-06-21 17:06:26,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:26,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781425512] [2024-06-21 17:06:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:26,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:27,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:27,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781425512] [2024-06-21 17:06:27,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781425512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:27,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:27,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:27,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332891057] [2024-06-21 17:06:27,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:27,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:27,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:27,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:27,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:27,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:27,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 118 transitions, 1086 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:27,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:27,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:27,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:28,080 INFO L124 PetriNetUnfolderBase]: 279/571 cut-off events. [2024-06-21 17:06:28,080 INFO L125 PetriNetUnfolderBase]: For 11263/11263 co-relation queries the response was YES. [2024-06-21 17:06:28,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2875 conditions, 571 events. 279/571 cut-off events. For 11263/11263 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2865 event pairs, 43 based on Foata normal form. 2/570 useless extension candidates. Maximal degree in co-relation 2806. Up to 419 conditions per place. [2024-06-21 17:06:28,083 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 94 selfloop transitions, 33 changer transitions 2/133 dead transitions. [2024-06-21 17:06:28,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 133 transitions, 1420 flow [2024-06-21 17:06:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-21 17:06:28,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:06:28,095 INFO L175 Difference]: Start difference. First operand has 151 places, 118 transitions, 1086 flow. Second operand 9 states and 120 transitions. [2024-06-21 17:06:28,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 133 transitions, 1420 flow [2024-06-21 17:06:28,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 133 transitions, 1323 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:28,117 INFO L231 Difference]: Finished difference. Result has 155 places, 121 transitions, 1103 flow [2024-06-21 17:06:28,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1103, PETRI_PLACES=155, PETRI_TRANSITIONS=121} [2024-06-21 17:06:28,118 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 124 predicate places. [2024-06-21 17:06:28,118 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 121 transitions, 1103 flow [2024-06-21 17:06:28,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:28,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:28,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:28,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:06:28,119 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:28,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:28,119 INFO L85 PathProgramCache]: Analyzing trace with hash 662201364, now seen corresponding path program 6 times [2024-06-21 17:06:28,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:28,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118217003] [2024-06-21 17:06:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:28,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:28,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:28,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118217003] [2024-06-21 17:06:28,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118217003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:28,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:28,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:28,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750704667] [2024-06-21 17:06:28,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:28,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:28,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:28,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:28,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:28,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:28,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 121 transitions, 1103 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:28,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:28,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:28,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:29,151 INFO L124 PetriNetUnfolderBase]: 288/590 cut-off events. [2024-06-21 17:06:29,151 INFO L125 PetriNetUnfolderBase]: For 11366/11366 co-relation queries the response was YES. [2024-06-21 17:06:29,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2938 conditions, 590 events. 288/590 cut-off events. For 11366/11366 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2980 event pairs, 50 based on Foata normal form. 2/589 useless extension candidates. Maximal degree in co-relation 2867. Up to 438 conditions per place. [2024-06-21 17:06:29,154 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 96 selfloop transitions, 34 changer transitions 0/134 dead transitions. [2024-06-21 17:06:29,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 134 transitions, 1415 flow [2024-06-21 17:06:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:29,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-21 17:06:29,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2024-06-21 17:06:29,154 INFO L175 Difference]: Start difference. First operand has 155 places, 121 transitions, 1103 flow. Second operand 9 states and 122 transitions. [2024-06-21 17:06:29,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 134 transitions, 1415 flow [2024-06-21 17:06:29,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 134 transitions, 1380 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 17:06:29,196 INFO L231 Difference]: Finished difference. Result has 162 places, 124 transitions, 1180 flow [2024-06-21 17:06:29,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1180, PETRI_PLACES=162, PETRI_TRANSITIONS=124} [2024-06-21 17:06:29,196 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 131 predicate places. [2024-06-21 17:06:29,196 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 124 transitions, 1180 flow [2024-06-21 17:06:29,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:29,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:29,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:29,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:06:29,197 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:29,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:29,197 INFO L85 PathProgramCache]: Analyzing trace with hash 988353102, now seen corresponding path program 1 times [2024-06-21 17:06:29,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:29,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769195898] [2024-06-21 17:06:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:29,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:29,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:29,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769195898] [2024-06-21 17:06:29,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769195898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:29,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:29,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:29,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425758825] [2024-06-21 17:06:29,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:29,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:29,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:29,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:29,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:30,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:30,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 124 transitions, 1180 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:30,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:30,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:30,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:30,340 INFO L124 PetriNetUnfolderBase]: 291/595 cut-off events. [2024-06-21 17:06:30,340 INFO L125 PetriNetUnfolderBase]: For 12084/12084 co-relation queries the response was YES. [2024-06-21 17:06:30,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3039 conditions, 595 events. 291/595 cut-off events. For 12084/12084 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3010 event pairs, 46 based on Foata normal form. 1/591 useless extension candidates. Maximal degree in co-relation 2966. Up to 440 conditions per place. [2024-06-21 17:06:30,344 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 84 selfloop transitions, 47 changer transitions 0/135 dead transitions. [2024-06-21 17:06:30,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 135 transitions, 1504 flow [2024-06-21 17:06:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:30,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-06-21 17:06:30,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409722222222222 [2024-06-21 17:06:30,345 INFO L175 Difference]: Start difference. First operand has 162 places, 124 transitions, 1180 flow. Second operand 9 states and 127 transitions. [2024-06-21 17:06:30,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 135 transitions, 1504 flow [2024-06-21 17:06:30,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 135 transitions, 1428 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 17:06:30,372 INFO L231 Difference]: Finished difference. Result has 166 places, 126 transitions, 1249 flow [2024-06-21 17:06:30,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1249, PETRI_PLACES=166, PETRI_TRANSITIONS=126} [2024-06-21 17:06:30,372 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 135 predicate places. [2024-06-21 17:06:30,372 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 126 transitions, 1249 flow [2024-06-21 17:06:30,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:30,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:30,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:30,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:06:30,373 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:30,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1368791272, now seen corresponding path program 2 times [2024-06-21 17:06:30,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:30,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870643392] [2024-06-21 17:06:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:30,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:31,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:31,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870643392] [2024-06-21 17:06:31,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870643392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:31,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:31,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:31,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664953033] [2024-06-21 17:06:31,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:31,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:31,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:31,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:31,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:31,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:31,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 126 transitions, 1249 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:31,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:31,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:31,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:31,478 INFO L124 PetriNetUnfolderBase]: 294/602 cut-off events. [2024-06-21 17:06:31,479 INFO L125 PetriNetUnfolderBase]: For 12619/12619 co-relation queries the response was YES. [2024-06-21 17:06:31,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3139 conditions, 602 events. 294/602 cut-off events. For 12619/12619 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3054 event pairs, 46 based on Foata normal form. 1/598 useless extension candidates. Maximal degree in co-relation 3065. Up to 404 conditions per place. [2024-06-21 17:06:31,482 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 78 selfloop transitions, 56 changer transitions 0/138 dead transitions. [2024-06-21 17:06:31,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 138 transitions, 1585 flow [2024-06-21 17:06:31,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-21 17:06:31,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 17:06:31,493 INFO L175 Difference]: Start difference. First operand has 166 places, 126 transitions, 1249 flow. Second operand 10 states and 138 transitions. [2024-06-21 17:06:31,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 138 transitions, 1585 flow [2024-06-21 17:06:31,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 138 transitions, 1451 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:31,525 INFO L231 Difference]: Finished difference. Result has 169 places, 128 transitions, 1278 flow [2024-06-21 17:06:31,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1278, PETRI_PLACES=169, PETRI_TRANSITIONS=128} [2024-06-21 17:06:31,525 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 138 predicate places. [2024-06-21 17:06:31,525 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 128 transitions, 1278 flow [2024-06-21 17:06:31,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:31,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:31,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:31,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:06:31,526 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:31,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:31,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1224980612, now seen corresponding path program 7 times [2024-06-21 17:06:31,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:31,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113267108] [2024-06-21 17:06:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:31,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:32,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:32,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113267108] [2024-06-21 17:06:32,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113267108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:32,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:32,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:32,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803354506] [2024-06-21 17:06:32,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:32,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:32,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:32,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:32,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:32,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:32,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 128 transitions, 1278 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:32,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:32,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:32,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:32,626 INFO L124 PetriNetUnfolderBase]: 305/625 cut-off events. [2024-06-21 17:06:32,626 INFO L125 PetriNetUnfolderBase]: For 15355/15355 co-relation queries the response was YES. [2024-06-21 17:06:32,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3310 conditions, 625 events. 305/625 cut-off events. For 15355/15355 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3184 event pairs, 53 based on Foata normal form. 2/624 useless extension candidates. Maximal degree in co-relation 3235. Up to 458 conditions per place. [2024-06-21 17:06:32,629 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 105 selfloop transitions, 32 changer transitions 0/141 dead transitions. [2024-06-21 17:06:32,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 141 transitions, 1686 flow [2024-06-21 17:06:32,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-21 17:06:32,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 17:06:32,639 INFO L175 Difference]: Start difference. First operand has 169 places, 128 transitions, 1278 flow. Second operand 9 states and 124 transitions. [2024-06-21 17:06:32,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 141 transitions, 1686 flow [2024-06-21 17:06:32,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 141 transitions, 1543 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 17:06:32,677 INFO L231 Difference]: Finished difference. Result has 170 places, 130 transitions, 1235 flow [2024-06-21 17:06:32,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1235, PETRI_PLACES=170, PETRI_TRANSITIONS=130} [2024-06-21 17:06:32,678 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 139 predicate places. [2024-06-21 17:06:32,678 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 130 transitions, 1235 flow [2024-06-21 17:06:32,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:32,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:32,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:32,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:06:32,679 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:32,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:32,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1647288708, now seen corresponding path program 8 times [2024-06-21 17:06:32,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:32,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916088740] [2024-06-21 17:06:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:32,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:33,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:33,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916088740] [2024-06-21 17:06:33,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916088740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:33,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:33,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:33,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458679575] [2024-06-21 17:06:33,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:33,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:33,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:33,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:33,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:33,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:33,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 130 transitions, 1235 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:33,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:33,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:33,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:33,767 INFO L124 PetriNetUnfolderBase]: 310/638 cut-off events. [2024-06-21 17:06:33,767 INFO L125 PetriNetUnfolderBase]: For 16098/16098 co-relation queries the response was YES. [2024-06-21 17:06:33,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3320 conditions, 638 events. 310/638 cut-off events. For 16098/16098 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3299 event pairs, 55 based on Foata normal form. 2/637 useless extension candidates. Maximal degree in co-relation 3244. Up to 493 conditions per place. [2024-06-21 17:06:33,770 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 106 selfloop transitions, 31 changer transitions 0/141 dead transitions. [2024-06-21 17:06:33,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 141 transitions, 1556 flow [2024-06-21 17:06:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-21 17:06:33,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:06:33,771 INFO L175 Difference]: Start difference. First operand has 170 places, 130 transitions, 1235 flow. Second operand 9 states and 120 transitions. [2024-06-21 17:06:33,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 141 transitions, 1556 flow [2024-06-21 17:06:33,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 141 transitions, 1459 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 17:06:33,812 INFO L231 Difference]: Finished difference. Result has 171 places, 132 transitions, 1233 flow [2024-06-21 17:06:33,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1233, PETRI_PLACES=171, PETRI_TRANSITIONS=132} [2024-06-21 17:06:33,812 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 140 predicate places. [2024-06-21 17:06:33,812 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 132 transitions, 1233 flow [2024-06-21 17:06:33,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:33,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:33,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:33,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:06:33,813 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:33,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:33,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1978647864, now seen corresponding path program 9 times [2024-06-21 17:06:33,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:33,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990099239] [2024-06-21 17:06:33,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:33,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:34,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:34,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990099239] [2024-06-21 17:06:34,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990099239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:34,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:34,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:34,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720015125] [2024-06-21 17:06:34,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:34,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:34,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:34,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:34,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:34,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:34,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 132 transitions, 1233 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:34,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:34,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:34,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:34,922 INFO L124 PetriNetUnfolderBase]: 314/646 cut-off events. [2024-06-21 17:06:34,922 INFO L125 PetriNetUnfolderBase]: For 16652/16652 co-relation queries the response was YES. [2024-06-21 17:06:34,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3369 conditions, 646 events. 314/646 cut-off events. For 16652/16652 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3348 event pairs, 55 based on Foata normal form. 2/645 useless extension candidates. Maximal degree in co-relation 3293. Up to 501 conditions per place. [2024-06-21 17:06:34,926 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 104 selfloop transitions, 35 changer transitions 0/143 dead transitions. [2024-06-21 17:06:34,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 143 transitions, 1550 flow [2024-06-21 17:06:34,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:34,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-21 17:06:34,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:06:34,927 INFO L175 Difference]: Start difference. First operand has 171 places, 132 transitions, 1233 flow. Second operand 10 states and 132 transitions. [2024-06-21 17:06:34,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 143 transitions, 1550 flow [2024-06-21 17:06:34,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 143 transitions, 1482 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:34,965 INFO L231 Difference]: Finished difference. Result has 175 places, 133 transitions, 1258 flow [2024-06-21 17:06:34,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1258, PETRI_PLACES=175, PETRI_TRANSITIONS=133} [2024-06-21 17:06:34,966 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 144 predicate places. [2024-06-21 17:06:34,966 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 133 transitions, 1258 flow [2024-06-21 17:06:34,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:34,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:34,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:34,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:06:34,966 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:34,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:34,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1641032598, now seen corresponding path program 10 times [2024-06-21 17:06:34,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:34,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635772855] [2024-06-21 17:06:34,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:34,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:35,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:35,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635772855] [2024-06-21 17:06:35,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635772855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:35,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:35,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:35,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765866528] [2024-06-21 17:06:35,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:35,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:35,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:35,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:35,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:35,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:35,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 133 transitions, 1258 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:35,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:35,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:35,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:36,053 INFO L124 PetriNetUnfolderBase]: 311/641 cut-off events. [2024-06-21 17:06:36,053 INFO L125 PetriNetUnfolderBase]: For 15448/15448 co-relation queries the response was YES. [2024-06-21 17:06:36,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3275 conditions, 641 events. 311/641 cut-off events. For 15448/15448 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3315 event pairs, 54 based on Foata normal form. 2/640 useless extension candidates. Maximal degree in co-relation 3198. Up to 496 conditions per place. [2024-06-21 17:06:36,056 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 108 selfloop transitions, 30 changer transitions 0/142 dead transitions. [2024-06-21 17:06:36,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 142 transitions, 1554 flow [2024-06-21 17:06:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-21 17:06:36,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201388888888889 [2024-06-21 17:06:36,057 INFO L175 Difference]: Start difference. First operand has 175 places, 133 transitions, 1258 flow. Second operand 9 states and 121 transitions. [2024-06-21 17:06:36,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 142 transitions, 1554 flow [2024-06-21 17:06:36,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 142 transitions, 1461 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 17:06:36,099 INFO L231 Difference]: Finished difference. Result has 176 places, 133 transitions, 1229 flow [2024-06-21 17:06:36,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1229, PETRI_PLACES=176, PETRI_TRANSITIONS=133} [2024-06-21 17:06:36,099 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 145 predicate places. [2024-06-21 17:06:36,099 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 133 transitions, 1229 flow [2024-06-21 17:06:36,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:36,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:36,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:36,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:06:36,100 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:36,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:36,100 INFO L85 PathProgramCache]: Analyzing trace with hash -830701480, now seen corresponding path program 3 times [2024-06-21 17:06:36,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:36,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438830676] [2024-06-21 17:06:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:36,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:37,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:37,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438830676] [2024-06-21 17:06:37,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438830676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:37,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:37,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:37,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281935244] [2024-06-21 17:06:37,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:37,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:37,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:37,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:37,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:37,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:37,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 133 transitions, 1229 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:37,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:37,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:37,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:37,540 INFO L124 PetriNetUnfolderBase]: 314/648 cut-off events. [2024-06-21 17:06:37,540 INFO L125 PetriNetUnfolderBase]: For 15089/15089 co-relation queries the response was YES. [2024-06-21 17:06:37,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3287 conditions, 648 events. 314/648 cut-off events. For 15089/15089 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3362 event pairs, 54 based on Foata normal form. 1/646 useless extension candidates. Maximal degree in co-relation 3209. Up to 472 conditions per place. [2024-06-21 17:06:37,543 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 96 selfloop transitions, 46 changer transitions 0/146 dead transitions. [2024-06-21 17:06:37,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 146 transitions, 1579 flow [2024-06-21 17:06:37,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:06:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:06:37,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 157 transitions. [2024-06-21 17:06:37,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088541666666667 [2024-06-21 17:06:37,544 INFO L175 Difference]: Start difference. First operand has 176 places, 133 transitions, 1229 flow. Second operand 12 states and 157 transitions. [2024-06-21 17:06:37,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 146 transitions, 1579 flow [2024-06-21 17:06:37,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 146 transitions, 1495 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:37,588 INFO L231 Difference]: Finished difference. Result has 179 places, 135 transitions, 1289 flow [2024-06-21 17:06:37,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1289, PETRI_PLACES=179, PETRI_TRANSITIONS=135} [2024-06-21 17:06:37,588 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 148 predicate places. [2024-06-21 17:06:37,588 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 135 transitions, 1289 flow [2024-06-21 17:06:37,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:37,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:37,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:37,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:06:37,588 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:37,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:37,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1987225688, now seen corresponding path program 4 times [2024-06-21 17:06:37,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:37,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882178211] [2024-06-21 17:06:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:37,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:38,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:38,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882178211] [2024-06-21 17:06:38,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882178211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:38,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:38,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:38,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602195768] [2024-06-21 17:06:38,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:38,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:38,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:38,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:38,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:38,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:38,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 135 transitions, 1289 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:38,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:38,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:38,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:39,026 INFO L124 PetriNetUnfolderBase]: 317/653 cut-off events. [2024-06-21 17:06:39,026 INFO L125 PetriNetUnfolderBase]: For 15929/15929 co-relation queries the response was YES. [2024-06-21 17:06:39,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3378 conditions, 653 events. 317/653 cut-off events. For 15929/15929 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3416 event pairs, 48 based on Foata normal form. 1/649 useless extension candidates. Maximal degree in co-relation 3300. Up to 454 conditions per place. [2024-06-21 17:06:39,029 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 92 selfloop transitions, 52 changer transitions 0/148 dead transitions. [2024-06-21 17:06:39,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 148 transitions, 1651 flow [2024-06-21 17:06:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-06-21 17:06:39,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-21 17:06:39,031 INFO L175 Difference]: Start difference. First operand has 179 places, 135 transitions, 1289 flow. Second operand 11 states and 148 transitions. [2024-06-21 17:06:39,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 148 transitions, 1651 flow [2024-06-21 17:06:39,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 148 transitions, 1525 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-21 17:06:39,070 INFO L231 Difference]: Finished difference. Result has 180 places, 137 transitions, 1322 flow [2024-06-21 17:06:39,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1322, PETRI_PLACES=180, PETRI_TRANSITIONS=137} [2024-06-21 17:06:39,071 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 149 predicate places. [2024-06-21 17:06:39,071 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 137 transitions, 1322 flow [2024-06-21 17:06:39,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:39,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:39,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:39,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:06:39,071 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:39,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:39,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1410809734, now seen corresponding path program 5 times [2024-06-21 17:06:39,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:39,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636472114] [2024-06-21 17:06:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:39,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:39,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:39,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636472114] [2024-06-21 17:06:39,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636472114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:39,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:39,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:39,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686569168] [2024-06-21 17:06:39,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:39,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:39,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:39,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:39,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:39,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:39,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 137 transitions, 1322 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:39,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:39,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:39,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:40,163 INFO L124 PetriNetUnfolderBase]: 315/652 cut-off events. [2024-06-21 17:06:40,163 INFO L125 PetriNetUnfolderBase]: For 15389/15389 co-relation queries the response was YES. [2024-06-21 17:06:40,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3319 conditions, 652 events. 315/652 cut-off events. For 15389/15389 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3427 event pairs, 54 based on Foata normal form. 1/650 useless extension candidates. Maximal degree in co-relation 3240. Up to 488 conditions per place. [2024-06-21 17:06:40,166 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 109 selfloop transitions, 35 changer transitions 0/148 dead transitions. [2024-06-21 17:06:40,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 148 transitions, 1680 flow [2024-06-21 17:06:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:40,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-21 17:06:40,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 17:06:40,167 INFO L175 Difference]: Start difference. First operand has 180 places, 137 transitions, 1322 flow. Second operand 10 states and 134 transitions. [2024-06-21 17:06:40,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 148 transitions, 1680 flow [2024-06-21 17:06:40,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 148 transitions, 1537 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:40,205 INFO L231 Difference]: Finished difference. Result has 181 places, 139 transitions, 1308 flow [2024-06-21 17:06:40,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1308, PETRI_PLACES=181, PETRI_TRANSITIONS=139} [2024-06-21 17:06:40,205 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 150 predicate places. [2024-06-21 17:06:40,205 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 139 transitions, 1308 flow [2024-06-21 17:06:40,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:40,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:40,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:40,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:06:40,206 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:40,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:40,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1396892412, now seen corresponding path program 11 times [2024-06-21 17:06:40,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:40,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139026550] [2024-06-21 17:06:40,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:40,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:40,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:40,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139026550] [2024-06-21 17:06:40,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139026550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:40,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:40,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:40,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887669094] [2024-06-21 17:06:40,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:40,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:40,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:40,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:40,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:40,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:40,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 139 transitions, 1308 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:40,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:40,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:40,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:41,201 INFO L124 PetriNetUnfolderBase]: 312/645 cut-off events. [2024-06-21 17:06:41,201 INFO L125 PetriNetUnfolderBase]: For 14628/14628 co-relation queries the response was YES. [2024-06-21 17:06:41,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3148 conditions, 645 events. 312/645 cut-off events. For 14628/14628 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3384 event pairs, 43 based on Foata normal form. 2/642 useless extension candidates. Maximal degree in co-relation 3068. Up to 471 conditions per place. [2024-06-21 17:06:41,204 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 104 selfloop transitions, 41 changer transitions 0/149 dead transitions. [2024-06-21 17:06:41,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 149 transitions, 1624 flow [2024-06-21 17:06:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:41,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:41,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-21 17:06:41,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:06:41,205 INFO L175 Difference]: Start difference. First operand has 181 places, 139 transitions, 1308 flow. Second operand 8 states and 112 transitions. [2024-06-21 17:06:41,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 149 transitions, 1624 flow [2024-06-21 17:06:41,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 149 transitions, 1507 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 17:06:41,248 INFO L231 Difference]: Finished difference. Result has 181 places, 139 transitions, 1279 flow [2024-06-21 17:06:41,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1279, PETRI_PLACES=181, PETRI_TRANSITIONS=139} [2024-06-21 17:06:41,248 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 150 predicate places. [2024-06-21 17:06:41,248 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 139 transitions, 1279 flow [2024-06-21 17:06:41,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:41,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:41,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:41,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:06:41,249 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:41,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:41,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1540383199, now seen corresponding path program 1 times [2024-06-21 17:06:41,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:41,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152477844] [2024-06-21 17:06:41,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:41,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:41,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:41,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152477844] [2024-06-21 17:06:41,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152477844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:41,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:41,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:41,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444709042] [2024-06-21 17:06:41,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:41,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:41,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:41,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:41,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:42,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:42,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 139 transitions, 1279 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:42,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:42,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:42,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:42,239 INFO L124 PetriNetUnfolderBase]: 316/653 cut-off events. [2024-06-21 17:06:42,239 INFO L125 PetriNetUnfolderBase]: For 14871/14871 co-relation queries the response was YES. [2024-06-21 17:06:42,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3165 conditions, 653 events. 316/653 cut-off events. For 14871/14871 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3430 event pairs, 30 based on Foata normal form. 2/650 useless extension candidates. Maximal degree in co-relation 3084. Up to 521 conditions per place. [2024-06-21 17:06:42,243 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 136 selfloop transitions, 14 changer transitions 0/154 dead transitions. [2024-06-21 17:06:42,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 154 transitions, 1619 flow [2024-06-21 17:06:42,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 17:06:42,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 17:06:42,244 INFO L175 Difference]: Start difference. First operand has 181 places, 139 transitions, 1279 flow. Second operand 9 states and 114 transitions. [2024-06-21 17:06:42,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 154 transitions, 1619 flow [2024-06-21 17:06:42,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 154 transitions, 1437 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-21 17:06:42,281 INFO L231 Difference]: Finished difference. Result has 178 places, 140 transitions, 1137 flow [2024-06-21 17:06:42,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1137, PETRI_PLACES=178, PETRI_TRANSITIONS=140} [2024-06-21 17:06:42,281 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 147 predicate places. [2024-06-21 17:06:42,281 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 140 transitions, 1137 flow [2024-06-21 17:06:42,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:42,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:42,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:42,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:06:42,281 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:42,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:42,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2057496047, now seen corresponding path program 2 times [2024-06-21 17:06:42,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:42,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876996090] [2024-06-21 17:06:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:42,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:42,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:42,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876996090] [2024-06-21 17:06:42,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876996090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:42,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:42,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:42,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220647744] [2024-06-21 17:06:42,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:42,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:42,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:42,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:42,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:43,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:43,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 140 transitions, 1137 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:43,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:43,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:43,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:43,287 INFO L124 PetriNetUnfolderBase]: 320/661 cut-off events. [2024-06-21 17:06:43,287 INFO L125 PetriNetUnfolderBase]: For 14451/14451 co-relation queries the response was YES. [2024-06-21 17:06:43,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2973 conditions, 661 events. 320/661 cut-off events. For 14451/14451 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3487 event pairs, 43 based on Foata normal form. 2/658 useless extension candidates. Maximal degree in co-relation 2896. Up to 237 conditions per place. [2024-06-21 17:06:43,291 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 112 selfloop transitions, 39 changer transitions 0/155 dead transitions. [2024-06-21 17:06:43,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 155 transitions, 1577 flow [2024-06-21 17:06:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:43,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-21 17:06:43,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 17:06:43,291 INFO L175 Difference]: Start difference. First operand has 178 places, 140 transitions, 1137 flow. Second operand 9 states and 124 transitions. [2024-06-21 17:06:43,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 155 transitions, 1577 flow [2024-06-21 17:06:43,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 155 transitions, 1547 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:43,329 INFO L231 Difference]: Finished difference. Result has 180 places, 141 transitions, 1197 flow [2024-06-21 17:06:43,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1197, PETRI_PLACES=180, PETRI_TRANSITIONS=141} [2024-06-21 17:06:43,329 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 149 predicate places. [2024-06-21 17:06:43,330 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 141 transitions, 1197 flow [2024-06-21 17:06:43,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:43,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:43,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:43,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:06:43,330 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:43,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:43,330 INFO L85 PathProgramCache]: Analyzing trace with hash 627455943, now seen corresponding path program 3 times [2024-06-21 17:06:43,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:43,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042536544] [2024-06-21 17:06:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:43,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:44,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:44,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042536544] [2024-06-21 17:06:44,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042536544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:44,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:44,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:44,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217539935] [2024-06-21 17:06:44,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:44,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:44,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:44,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:44,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:44,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:44,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 141 transitions, 1197 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:44,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:44,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:44,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:44,363 INFO L124 PetriNetUnfolderBase]: 331/682 cut-off events. [2024-06-21 17:06:44,363 INFO L125 PetriNetUnfolderBase]: For 17733/17733 co-relation queries the response was YES. [2024-06-21 17:06:44,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3226 conditions, 682 events. 331/682 cut-off events. For 17733/17733 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3607 event pairs, 50 based on Foata normal form. 2/679 useless extension candidates. Maximal degree in co-relation 3148. Up to 436 conditions per place. [2024-06-21 17:06:44,367 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 98 selfloop transitions, 53 changer transitions 0/155 dead transitions. [2024-06-21 17:06:44,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 155 transitions, 1647 flow [2024-06-21 17:06:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-06-21 17:06:44,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409722222222222 [2024-06-21 17:06:44,368 INFO L175 Difference]: Start difference. First operand has 180 places, 141 transitions, 1197 flow. Second operand 9 states and 127 transitions. [2024-06-21 17:06:44,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 155 transitions, 1647 flow [2024-06-21 17:06:44,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 155 transitions, 1579 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:44,402 INFO L231 Difference]: Finished difference. Result has 183 places, 143 transitions, 1264 flow [2024-06-21 17:06:44,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1264, PETRI_PLACES=183, PETRI_TRANSITIONS=143} [2024-06-21 17:06:44,403 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 152 predicate places. [2024-06-21 17:06:44,403 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 143 transitions, 1264 flow [2024-06-21 17:06:44,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:44,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:44,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:44,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:06:44,403 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:44,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash 627663333, now seen corresponding path program 4 times [2024-06-21 17:06:44,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:44,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426587645] [2024-06-21 17:06:44,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:44,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:45,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:45,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426587645] [2024-06-21 17:06:45,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426587645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:45,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:45,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:45,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548848311] [2024-06-21 17:06:45,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:45,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:45,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:45,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:45,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:45,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:45,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 143 transitions, 1264 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:45,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:45,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:45,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:45,402 INFO L124 PetriNetUnfolderBase]: 328/677 cut-off events. [2024-06-21 17:06:45,403 INFO L125 PetriNetUnfolderBase]: For 15955/15955 co-relation queries the response was YES. [2024-06-21 17:06:45,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3163 conditions, 677 events. 328/677 cut-off events. For 15955/15955 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3582 event pairs, 51 based on Foata normal form. 2/674 useless extension candidates. Maximal degree in co-relation 3084. Up to 478 conditions per place. [2024-06-21 17:06:45,406 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 98 selfloop transitions, 51 changer transitions 0/153 dead transitions. [2024-06-21 17:06:45,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 153 transitions, 1588 flow [2024-06-21 17:06:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-21 17:06:45,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340277777777778 [2024-06-21 17:06:45,407 INFO L175 Difference]: Start difference. First operand has 183 places, 143 transitions, 1264 flow. Second operand 9 states and 125 transitions. [2024-06-21 17:06:45,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 153 transitions, 1588 flow [2024-06-21 17:06:45,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 153 transitions, 1511 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:06:45,441 INFO L231 Difference]: Finished difference. Result has 187 places, 143 transitions, 1293 flow [2024-06-21 17:06:45,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1293, PETRI_PLACES=187, PETRI_TRANSITIONS=143} [2024-06-21 17:06:45,442 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 156 predicate places. [2024-06-21 17:06:45,442 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 143 transitions, 1293 flow [2024-06-21 17:06:45,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:45,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:45,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:45,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:06:45,442 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:45,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:45,443 INFO L85 PathProgramCache]: Analyzing trace with hash -2095368179, now seen corresponding path program 5 times [2024-06-21 17:06:45,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:45,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622157462] [2024-06-21 17:06:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:45,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:46,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:46,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622157462] [2024-06-21 17:06:46,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622157462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:46,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:46,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:46,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418785633] [2024-06-21 17:06:46,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:46,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:46,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:46,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:46,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:46,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:46,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 143 transitions, 1293 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:46,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:46,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:46,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:46,494 INFO L124 PetriNetUnfolderBase]: 332/685 cut-off events. [2024-06-21 17:06:46,494 INFO L125 PetriNetUnfolderBase]: For 16480/16480 co-relation queries the response was YES. [2024-06-21 17:06:46,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3259 conditions, 685 events. 332/685 cut-off events. For 16480/16480 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3634 event pairs, 43 based on Foata normal form. 2/682 useless extension candidates. Maximal degree in co-relation 3178. Up to 366 conditions per place. [2024-06-21 17:06:46,498 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 98 selfloop transitions, 54 changer transitions 0/156 dead transitions. [2024-06-21 17:06:46,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 156 transitions, 1636 flow [2024-06-21 17:06:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-21 17:06:46,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:06:46,499 INFO L175 Difference]: Start difference. First operand has 187 places, 143 transitions, 1293 flow. Second operand 9 states and 126 transitions. [2024-06-21 17:06:46,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 156 transitions, 1636 flow [2024-06-21 17:06:46,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 156 transitions, 1526 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 17:06:46,544 INFO L231 Difference]: Finished difference. Result has 188 places, 144 transitions, 1309 flow [2024-06-21 17:06:46,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1309, PETRI_PLACES=188, PETRI_TRANSITIONS=144} [2024-06-21 17:06:46,545 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 157 predicate places. [2024-06-21 17:06:46,545 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 144 transitions, 1309 flow [2024-06-21 17:06:46,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:46,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:46,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:46,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:06:46,545 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:46,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:46,545 INFO L85 PathProgramCache]: Analyzing trace with hash -2089646323, now seen corresponding path program 1 times [2024-06-21 17:06:46,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:46,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652163335] [2024-06-21 17:06:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:46,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:47,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:47,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652163335] [2024-06-21 17:06:47,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652163335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:47,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:47,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:47,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252363833] [2024-06-21 17:06:47,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:47,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:47,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:47,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:47,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:47,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:47,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 144 transitions, 1309 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:47,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:47,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:47,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:47,877 INFO L124 PetriNetUnfolderBase]: 344/717 cut-off events. [2024-06-21 17:06:47,877 INFO L125 PetriNetUnfolderBase]: For 25235/25235 co-relation queries the response was YES. [2024-06-21 17:06:47,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3452 conditions, 717 events. 344/717 cut-off events. For 25235/25235 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3845 event pairs, 56 based on Foata normal form. 8/720 useless extension candidates. Maximal degree in co-relation 3370. Up to 457 conditions per place. [2024-06-21 17:06:47,881 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 93 selfloop transitions, 51 changer transitions 10/158 dead transitions. [2024-06-21 17:06:47,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 158 transitions, 1701 flow [2024-06-21 17:06:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-21 17:06:47,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-21 17:06:47,882 INFO L175 Difference]: Start difference. First operand has 188 places, 144 transitions, 1309 flow. Second operand 10 states and 142 transitions. [2024-06-21 17:06:47,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 158 transitions, 1701 flow [2024-06-21 17:06:47,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 158 transitions, 1592 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:47,931 INFO L231 Difference]: Finished difference. Result has 191 places, 137 transitions, 1252 flow [2024-06-21 17:06:47,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1252, PETRI_PLACES=191, PETRI_TRANSITIONS=137} [2024-06-21 17:06:47,932 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 160 predicate places. [2024-06-21 17:06:47,932 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 137 transitions, 1252 flow [2024-06-21 17:06:47,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:47,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:47,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:47,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:06:47,933 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:47,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:47,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1640409193, now seen corresponding path program 2 times [2024-06-21 17:06:47,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:47,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002892786] [2024-06-21 17:06:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:47,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:48,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:48,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002892786] [2024-06-21 17:06:48,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002892786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:48,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:48,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:48,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262686199] [2024-06-21 17:06:48,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:48,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:48,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:48,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:48,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:48,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:48,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 137 transitions, 1252 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:48,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:48,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:48,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:49,299 INFO L124 PetriNetUnfolderBase]: 348/739 cut-off events. [2024-06-21 17:06:49,299 INFO L125 PetriNetUnfolderBase]: For 33414/33414 co-relation queries the response was YES. [2024-06-21 17:06:49,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3985 conditions, 739 events. 348/739 cut-off events. For 33414/33414 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3979 event pairs, 62 based on Foata normal form. 6/742 useless extension candidates. Maximal degree in co-relation 3902. Up to 446 conditions per place. [2024-06-21 17:06:49,303 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 96 selfloop transitions, 54 changer transitions 5/159 dead transitions. [2024-06-21 17:06:49,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 159 transitions, 1802 flow [2024-06-21 17:06:49,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:06:49,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:06:49,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 166 transitions. [2024-06-21 17:06:49,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4322916666666667 [2024-06-21 17:06:49,304 INFO L175 Difference]: Start difference. First operand has 191 places, 137 transitions, 1252 flow. Second operand 12 states and 166 transitions. [2024-06-21 17:06:49,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 159 transitions, 1802 flow [2024-06-21 17:06:49,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 159 transitions, 1651 flow, removed 9 selfloop flow, removed 15 redundant places. [2024-06-21 17:06:49,359 INFO L231 Difference]: Finished difference. Result has 187 places, 136 transitions, 1215 flow [2024-06-21 17:06:49,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1215, PETRI_PLACES=187, PETRI_TRANSITIONS=136} [2024-06-21 17:06:49,359 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 156 predicate places. [2024-06-21 17:06:49,359 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 136 transitions, 1215 flow [2024-06-21 17:06:49,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:49,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:49,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:49,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:06:49,360 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:49,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:49,360 INFO L85 PathProgramCache]: Analyzing trace with hash 517144485, now seen corresponding path program 3 times [2024-06-21 17:06:49,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:49,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556643652] [2024-06-21 17:06:49,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:49,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:50,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:50,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556643652] [2024-06-21 17:06:50,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556643652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:50,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:50,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:50,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592380355] [2024-06-21 17:06:50,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:50,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:50,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:50,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:50,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:50,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:50,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 136 transitions, 1215 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:50,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:50,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:50,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:50,729 INFO L124 PetriNetUnfolderBase]: 326/693 cut-off events. [2024-06-21 17:06:50,729 INFO L125 PetriNetUnfolderBase]: For 24618/24618 co-relation queries the response was YES. [2024-06-21 17:06:50,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3272 conditions, 693 events. 326/693 cut-off events. For 24618/24618 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3695 event pairs, 65 based on Foata normal form. 8/698 useless extension candidates. Maximal degree in co-relation 3192. Up to 490 conditions per place. [2024-06-21 17:06:50,733 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 99 selfloop transitions, 38 changer transitions 9/150 dead transitions. [2024-06-21 17:06:50,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 150 transitions, 1585 flow [2024-06-21 17:06:50,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:50,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:50,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-06-21 17:06:50,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-21 17:06:50,734 INFO L175 Difference]: Start difference. First operand has 187 places, 136 transitions, 1215 flow. Second operand 11 states and 148 transitions. [2024-06-21 17:06:50,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 150 transitions, 1585 flow [2024-06-21 17:06:50,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 150 transitions, 1475 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 17:06:50,778 INFO L231 Difference]: Finished difference. Result has 186 places, 133 transitions, 1168 flow [2024-06-21 17:06:50,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1168, PETRI_PLACES=186, PETRI_TRANSITIONS=133} [2024-06-21 17:06:50,778 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 155 predicate places. [2024-06-21 17:06:50,778 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 133 transitions, 1168 flow [2024-06-21 17:06:50,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:50,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:50,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:50,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:06:50,779 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:50,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:50,779 INFO L85 PathProgramCache]: Analyzing trace with hash 468151969, now seen corresponding path program 6 times [2024-06-21 17:06:50,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:50,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50019093] [2024-06-21 17:06:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:50,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:51,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:51,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50019093] [2024-06-21 17:06:51,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50019093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:51,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:51,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:51,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001589305] [2024-06-21 17:06:51,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:51,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:51,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:51,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:51,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:51,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:51,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 133 transitions, 1168 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:51,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:51,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:51,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:51,925 INFO L124 PetriNetUnfolderBase]: 313/664 cut-off events. [2024-06-21 17:06:51,925 INFO L125 PetriNetUnfolderBase]: For 16910/16910 co-relation queries the response was YES. [2024-06-21 17:06:51,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3086 conditions, 664 events. 313/664 cut-off events. For 16910/16910 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3509 event pairs, 59 based on Foata normal form. 2/663 useless extension candidates. Maximal degree in co-relation 3006. Up to 439 conditions per place. [2024-06-21 17:06:51,929 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 107 selfloop transitions, 36 changer transitions 0/147 dead transitions. [2024-06-21 17:06:51,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 147 transitions, 1597 flow [2024-06-21 17:06:51,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-21 17:06:51,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 17:06:51,930 INFO L175 Difference]: Start difference. First operand has 186 places, 133 transitions, 1168 flow. Second operand 10 states and 138 transitions. [2024-06-21 17:06:51,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 147 transitions, 1597 flow [2024-06-21 17:06:51,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 147 transitions, 1509 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 17:06:51,974 INFO L231 Difference]: Finished difference. Result has 183 places, 134 transitions, 1171 flow [2024-06-21 17:06:51,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1171, PETRI_PLACES=183, PETRI_TRANSITIONS=134} [2024-06-21 17:06:51,976 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 152 predicate places. [2024-06-21 17:06:51,976 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 134 transitions, 1171 flow [2024-06-21 17:06:51,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:51,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:51,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:51,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:06:51,977 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:51,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:51,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1393442703, now seen corresponding path program 7 times [2024-06-21 17:06:51,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:51,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413095513] [2024-06-21 17:06:51,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:51,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:52,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:52,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413095513] [2024-06-21 17:06:52,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413095513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:52,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:52,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:52,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208062012] [2024-06-21 17:06:52,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:52,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:52,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:52,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:52,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:52,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:52,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 134 transitions, 1171 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:52,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:52,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:52,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:53,222 INFO L124 PetriNetUnfolderBase]: 317/672 cut-off events. [2024-06-21 17:06:53,222 INFO L125 PetriNetUnfolderBase]: For 16436/16436 co-relation queries the response was YES. [2024-06-21 17:06:53,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3107 conditions, 672 events. 317/672 cut-off events. For 16436/16436 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3569 event pairs, 63 based on Foata normal form. 2/671 useless extension candidates. Maximal degree in co-relation 3028. Up to 498 conditions per place. [2024-06-21 17:06:53,226 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 108 selfloop transitions, 34 changer transitions 0/146 dead transitions. [2024-06-21 17:06:53,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 146 transitions, 1492 flow [2024-06-21 17:06:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-21 17:06:53,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 17:06:53,227 INFO L175 Difference]: Start difference. First operand has 183 places, 134 transitions, 1171 flow. Second operand 10 states and 133 transitions. [2024-06-21 17:06:53,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 146 transitions, 1492 flow [2024-06-21 17:06:53,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 146 transitions, 1371 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:53,268 INFO L231 Difference]: Finished difference. Result has 184 places, 135 transitions, 1137 flow [2024-06-21 17:06:53,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1137, PETRI_PLACES=184, PETRI_TRANSITIONS=135} [2024-06-21 17:06:53,268 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 153 predicate places. [2024-06-21 17:06:53,268 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 135 transitions, 1137 flow [2024-06-21 17:06:53,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:53,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:53,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:53,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:06:53,269 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:53,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:53,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1208542535, now seen corresponding path program 8 times [2024-06-21 17:06:53,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:53,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596060786] [2024-06-21 17:06:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:53,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:54,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:54,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596060786] [2024-06-21 17:06:54,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596060786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:54,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:54,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:54,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674483915] [2024-06-21 17:06:54,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:54,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:54,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:54,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:54,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:54,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:54,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 135 transitions, 1137 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:54,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:54,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:54,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:54,644 INFO L124 PetriNetUnfolderBase]: 321/680 cut-off events. [2024-06-21 17:06:54,644 INFO L125 PetriNetUnfolderBase]: For 16948/16948 co-relation queries the response was YES. [2024-06-21 17:06:54,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3049 conditions, 680 events. 321/680 cut-off events. For 16948/16948 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3625 event pairs, 65 based on Foata normal form. 2/679 useless extension candidates. Maximal degree in co-relation 2970. Up to 506 conditions per place. [2024-06-21 17:06:54,648 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 106 selfloop transitions, 38 changer transitions 0/148 dead transitions. [2024-06-21 17:06:54,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 148 transitions, 1462 flow [2024-06-21 17:06:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:54,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 17:06:54,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-21 17:06:54,649 INFO L175 Difference]: Start difference. First operand has 184 places, 135 transitions, 1137 flow. Second operand 11 states and 146 transitions. [2024-06-21 17:06:54,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 148 transitions, 1462 flow [2024-06-21 17:06:54,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 148 transitions, 1390 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 17:06:54,695 INFO L231 Difference]: Finished difference. Result has 187 places, 136 transitions, 1158 flow [2024-06-21 17:06:54,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1158, PETRI_PLACES=187, PETRI_TRANSITIONS=136} [2024-06-21 17:06:54,696 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 156 predicate places. [2024-06-21 17:06:54,696 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 136 transitions, 1158 flow [2024-06-21 17:06:54,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:54,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:54,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:54,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:06:54,696 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:54,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:54,696 INFO L85 PathProgramCache]: Analyzing trace with hash -131556239, now seen corresponding path program 9 times [2024-06-21 17:06:54,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:54,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870021619] [2024-06-21 17:06:54,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:54,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:55,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:55,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870021619] [2024-06-21 17:06:55,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870021619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:55,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:55,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:55,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660915417] [2024-06-21 17:06:55,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:55,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:55,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:55,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:55,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:55,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:55,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 136 transitions, 1158 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:55,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:55,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:55,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:55,851 INFO L124 PetriNetUnfolderBase]: 318/675 cut-off events. [2024-06-21 17:06:55,851 INFO L125 PetriNetUnfolderBase]: For 14790/14790 co-relation queries the response was YES. [2024-06-21 17:06:55,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2944 conditions, 675 events. 318/675 cut-off events. For 14790/14790 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3600 event pairs, 64 based on Foata normal form. 2/674 useless extension candidates. Maximal degree in co-relation 2864. Up to 501 conditions per place. [2024-06-21 17:06:55,856 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 110 selfloop transitions, 33 changer transitions 0/147 dead transitions. [2024-06-21 17:06:55,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 147 transitions, 1468 flow [2024-06-21 17:06:55,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-21 17:06:55,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 17:06:55,858 INFO L175 Difference]: Start difference. First operand has 187 places, 136 transitions, 1158 flow. Second operand 10 states and 135 transitions. [2024-06-21 17:06:55,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 147 transitions, 1468 flow [2024-06-21 17:06:55,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 147 transitions, 1380 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:55,907 INFO L231 Difference]: Finished difference. Result has 188 places, 136 transitions, 1140 flow [2024-06-21 17:06:55,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1140, PETRI_PLACES=188, PETRI_TRANSITIONS=136} [2024-06-21 17:06:55,907 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 157 predicate places. [2024-06-21 17:06:55,907 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 136 transitions, 1140 flow [2024-06-21 17:06:55,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:55,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:55,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:55,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:06:55,908 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:55,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:55,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1043706507, now seen corresponding path program 4 times [2024-06-21 17:06:55,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:55,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874208553] [2024-06-21 17:06:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:55,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:56,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:56,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874208553] [2024-06-21 17:06:56,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874208553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:56,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:56,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:56,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766064294] [2024-06-21 17:06:56,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:56,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:56,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:56,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:56,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:56,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:56,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 136 transitions, 1140 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:56,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:56,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:56,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:57,176 INFO L124 PetriNetUnfolderBase]: 348/743 cut-off events. [2024-06-21 17:06:57,176 INFO L125 PetriNetUnfolderBase]: For 31590/31590 co-relation queries the response was YES. [2024-06-21 17:06:57,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3675 conditions, 743 events. 348/743 cut-off events. For 31590/31590 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4001 event pairs, 72 based on Foata normal form. 6/744 useless extension candidates. Maximal degree in co-relation 3594. Up to 463 conditions per place. [2024-06-21 17:06:57,180 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 105 selfloop transitions, 40 changer transitions 6/155 dead transitions. [2024-06-21 17:06:57,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 155 transitions, 1666 flow [2024-06-21 17:06:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 152 transitions. [2024-06-21 17:06:57,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 17:06:57,181 INFO L175 Difference]: Start difference. First operand has 188 places, 136 transitions, 1140 flow. Second operand 11 states and 152 transitions. [2024-06-21 17:06:57,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 155 transitions, 1666 flow [2024-06-21 17:06:57,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 155 transitions, 1560 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 17:06:57,240 INFO L231 Difference]: Finished difference. Result has 189 places, 134 transitions, 1106 flow [2024-06-21 17:06:57,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1106, PETRI_PLACES=189, PETRI_TRANSITIONS=134} [2024-06-21 17:06:57,241 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 158 predicate places. [2024-06-21 17:06:57,241 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 134 transitions, 1106 flow [2024-06-21 17:06:57,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:57,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:57,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:57,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:06:57,241 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:57,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:57,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1043715807, now seen corresponding path program 5 times [2024-06-21 17:06:57,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:57,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011314603] [2024-06-21 17:06:57,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:57,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:58,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:58,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011314603] [2024-06-21 17:06:58,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011314603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:58,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:58,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:58,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387518235] [2024-06-21 17:06:58,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:58,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:58,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:58,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:58,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:58,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:58,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 134 transitions, 1106 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:58,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:58,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:58,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:58,615 INFO L124 PetriNetUnfolderBase]: 324/693 cut-off events. [2024-06-21 17:06:58,615 INFO L125 PetriNetUnfolderBase]: For 24344/24344 co-relation queries the response was YES. [2024-06-21 17:06:58,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2980 conditions, 693 events. 324/693 cut-off events. For 24344/24344 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3724 event pairs, 70 based on Foata normal form. 8/698 useless extension candidates. Maximal degree in co-relation 2898. Up to 495 conditions per place. [2024-06-21 17:06:58,619 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 102 selfloop transitions, 29 changer transitions 13/148 dead transitions. [2024-06-21 17:06:58,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 148 transitions, 1468 flow [2024-06-21 17:06:58,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:58,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 17:06:58,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-21 17:06:58,620 INFO L175 Difference]: Start difference. First operand has 189 places, 134 transitions, 1106 flow. Second operand 11 states and 146 transitions. [2024-06-21 17:06:58,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 148 transitions, 1468 flow [2024-06-21 17:06:58,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 148 transitions, 1386 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 17:06:58,662 INFO L231 Difference]: Finished difference. Result has 188 places, 129 transitions, 1055 flow [2024-06-21 17:06:58,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1055, PETRI_PLACES=188, PETRI_TRANSITIONS=129} [2024-06-21 17:06:58,663 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 157 predicate places. [2024-06-21 17:06:58,663 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 129 transitions, 1055 flow [2024-06-21 17:06:58,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:58,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:58,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:58,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:06:58,663 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:58,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:58,663 INFO L85 PathProgramCache]: Analyzing trace with hash 389283233, now seen corresponding path program 6 times [2024-06-21 17:06:58,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:58,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864059128] [2024-06-21 17:06:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:58,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:59,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:59,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864059128] [2024-06-21 17:06:59,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864059128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:59,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:59,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:06:59,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703020905] [2024-06-21 17:06:59,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:59,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:06:59,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:06:59,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:06:59,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:06:59,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 129 transitions, 1055 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:59,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:59,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:06:59,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:00,078 INFO L124 PetriNetUnfolderBase]: 335/722 cut-off events. [2024-06-21 17:07:00,078 INFO L125 PetriNetUnfolderBase]: For 31520/31520 co-relation queries the response was YES. [2024-06-21 17:07:00,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3515 conditions, 722 events. 335/722 cut-off events. For 31520/31520 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3882 event pairs, 72 based on Foata normal form. 6/723 useless extension candidates. Maximal degree in co-relation 3434. Up to 398 conditions per place. [2024-06-21 17:07:00,082 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 89 selfloop transitions, 49 changer transitions 9/151 dead transitions. [2024-06-21 17:07:00,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 151 transitions, 1579 flow [2024-06-21 17:07:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:07:00,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:07:00,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 174 transitions. [2024-06-21 17:07:00,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182692307692308 [2024-06-21 17:07:00,083 INFO L175 Difference]: Start difference. First operand has 188 places, 129 transitions, 1055 flow. Second operand 13 states and 174 transitions. [2024-06-21 17:07:00,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 151 transitions, 1579 flow [2024-06-21 17:07:00,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 151 transitions, 1485 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-21 17:07:00,144 INFO L231 Difference]: Finished difference. Result has 183 places, 126 transitions, 1064 flow [2024-06-21 17:07:00,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1064, PETRI_PLACES=183, PETRI_TRANSITIONS=126} [2024-06-21 17:07:00,144 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 152 predicate places. [2024-06-21 17:07:00,145 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 126 transitions, 1064 flow [2024-06-21 17:07:00,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:00,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:00,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:00,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:07:00,145 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:00,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:00,145 INFO L85 PathProgramCache]: Analyzing trace with hash 18385283, now seen corresponding path program 7 times [2024-06-21 17:07:00,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:00,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513731477] [2024-06-21 17:07:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:00,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:01,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:01,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513731477] [2024-06-21 17:07:01,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513731477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:01,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:01,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:01,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752895896] [2024-06-21 17:07:01,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:01,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:01,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:01,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:01,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:01,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:01,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 126 transitions, 1064 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:01,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:01,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:01,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:01,626 INFO L124 PetriNetUnfolderBase]: 348/749 cut-off events. [2024-06-21 17:07:01,626 INFO L125 PetriNetUnfolderBase]: For 38257/38257 co-relation queries the response was YES. [2024-06-21 17:07:01,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4010 conditions, 749 events. 348/749 cut-off events. For 38257/38257 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4038 event pairs, 81 based on Foata normal form. 6/752 useless extension candidates. Maximal degree in co-relation 3932. Up to 458 conditions per place. [2024-06-21 17:07:01,630 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 88 selfloop transitions, 54 changer transitions 6/152 dead transitions. [2024-06-21 17:07:01,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 152 transitions, 1590 flow [2024-06-21 17:07:01,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 17:07:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 17:07:01,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 187 transitions. [2024-06-21 17:07:01,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174107142857143 [2024-06-21 17:07:01,633 INFO L175 Difference]: Start difference. First operand has 183 places, 126 transitions, 1064 flow. Second operand 14 states and 187 transitions. [2024-06-21 17:07:01,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 152 transitions, 1590 flow [2024-06-21 17:07:01,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 152 transitions, 1482 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 17:07:01,704 INFO L231 Difference]: Finished difference. Result has 181 places, 126 transitions, 1070 flow [2024-06-21 17:07:01,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1070, PETRI_PLACES=181, PETRI_TRANSITIONS=126} [2024-06-21 17:07:01,706 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 150 predicate places. [2024-06-21 17:07:01,706 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 126 transitions, 1070 flow [2024-06-21 17:07:01,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:01,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:01,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:01,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:07:01,707 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:01,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:01,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1474781571, now seen corresponding path program 8 times [2024-06-21 17:07:01,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:01,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938622475] [2024-06-21 17:07:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:01,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:02,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:02,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938622475] [2024-06-21 17:07:02,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938622475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:02,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:02,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:02,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157636394] [2024-06-21 17:07:02,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:02,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:02,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:02,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:02,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:02,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:02,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 126 transitions, 1070 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:02,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:02,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:02,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:03,100 INFO L124 PetriNetUnfolderBase]: 357/762 cut-off events. [2024-06-21 17:07:03,100 INFO L125 PetriNetUnfolderBase]: For 41941/41941 co-relation queries the response was YES. [2024-06-21 17:07:03,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4330 conditions, 762 events. 357/762 cut-off events. For 41941/41941 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4116 event pairs, 91 based on Foata normal form. 6/763 useless extension candidates. Maximal degree in co-relation 4254. Up to 493 conditions per place. [2024-06-21 17:07:03,104 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 89 selfloop transitions, 47 changer transitions 6/146 dead transitions. [2024-06-21 17:07:03,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 146 transitions, 1558 flow [2024-06-21 17:07:03,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:07:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:07:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 163 transitions. [2024-06-21 17:07:03,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244791666666667 [2024-06-21 17:07:03,105 INFO L175 Difference]: Start difference. First operand has 181 places, 126 transitions, 1070 flow. Second operand 12 states and 163 transitions. [2024-06-21 17:07:03,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 146 transitions, 1558 flow [2024-06-21 17:07:03,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 146 transitions, 1453 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 17:07:03,185 INFO L231 Difference]: Finished difference. Result has 180 places, 124 transitions, 1053 flow [2024-06-21 17:07:03,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1053, PETRI_PLACES=180, PETRI_TRANSITIONS=124} [2024-06-21 17:07:03,185 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 149 predicate places. [2024-06-21 17:07:03,185 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 124 transitions, 1053 flow [2024-06-21 17:07:03,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:03,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:03,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:03,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:07:03,186 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:03,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:03,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1474455141, now seen corresponding path program 9 times [2024-06-21 17:07:03,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:03,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975616294] [2024-06-21 17:07:03,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:03,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:04,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:04,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975616294] [2024-06-21 17:07:04,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975616294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:04,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:04,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:04,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200701720] [2024-06-21 17:07:04,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:04,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:04,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:04,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:04,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:04,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:04,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 124 transitions, 1053 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:04,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:04,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:04,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:04,606 INFO L124 PetriNetUnfolderBase]: 333/712 cut-off events. [2024-06-21 17:07:04,606 INFO L125 PetriNetUnfolderBase]: For 35212/35212 co-relation queries the response was YES. [2024-06-21 17:07:04,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3735 conditions, 712 events. 333/712 cut-off events. For 35212/35212 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3763 event pairs, 89 based on Foata normal form. 8/717 useless extension candidates. Maximal degree in co-relation 3660. Up to 525 conditions per place. [2024-06-21 17:07:04,609 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 89 selfloop transitions, 33 changer transitions 13/139 dead transitions. [2024-06-21 17:07:04,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 139 transitions, 1391 flow [2024-06-21 17:07:04,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:07:04,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:07:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 157 transitions. [2024-06-21 17:07:04,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088541666666667 [2024-06-21 17:07:04,610 INFO L175 Difference]: Start difference. First operand has 180 places, 124 transitions, 1053 flow. Second operand 12 states and 157 transitions. [2024-06-21 17:07:04,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 139 transitions, 1391 flow [2024-06-21 17:07:04,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 139 transitions, 1295 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 17:07:04,681 INFO L231 Difference]: Finished difference. Result has 179 places, 119 transitions, 997 flow [2024-06-21 17:07:04,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=997, PETRI_PLACES=179, PETRI_TRANSITIONS=119} [2024-06-21 17:07:04,681 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 148 predicate places. [2024-06-21 17:07:04,681 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 119 transitions, 997 flow [2024-06-21 17:07:04,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:04,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:04,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:04,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:07:04,682 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:04,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:04,682 INFO L85 PathProgramCache]: Analyzing trace with hash -759007631, now seen corresponding path program 10 times [2024-06-21 17:07:04,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:04,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511856051] [2024-06-21 17:07:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:04,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:05,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:05,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511856051] [2024-06-21 17:07:05,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511856051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:05,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:05,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:05,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124209174] [2024-06-21 17:07:05,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:05,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:05,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:05,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:05,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:05,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:05,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 119 transitions, 997 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:05,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:05,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:05,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:06,078 INFO L124 PetriNetUnfolderBase]: 319/688 cut-off events. [2024-06-21 17:07:06,078 INFO L125 PetriNetUnfolderBase]: For 31382/31382 co-relation queries the response was YES. [2024-06-21 17:07:06,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3480 conditions, 688 events. 319/688 cut-off events. For 31382/31382 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3616 event pairs, 90 based on Foata normal form. 8/693 useless extension candidates. Maximal degree in co-relation 3406. Up to 502 conditions per place. [2024-06-21 17:07:06,082 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 86 selfloop transitions, 35 changer transitions 9/134 dead transitions. [2024-06-21 17:07:06,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 134 transitions, 1325 flow [2024-06-21 17:07:06,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:07:06,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:07:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 155 transitions. [2024-06-21 17:07:06,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4036458333333333 [2024-06-21 17:07:06,082 INFO L175 Difference]: Start difference. First operand has 179 places, 119 transitions, 997 flow. Second operand 12 states and 155 transitions. [2024-06-21 17:07:06,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 134 transitions, 1325 flow [2024-06-21 17:07:06,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 134 transitions, 1235 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-21 17:07:06,144 INFO L231 Difference]: Finished difference. Result has 172 places, 116 transitions, 968 flow [2024-06-21 17:07:06,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=968, PETRI_PLACES=172, PETRI_TRANSITIONS=116} [2024-06-21 17:07:06,144 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 141 predicate places. [2024-06-21 17:07:06,144 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 116 transitions, 968 flow [2024-06-21 17:07:06,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:06,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:06,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:06,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:07:06,145 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:06,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:06,145 INFO L85 PathProgramCache]: Analyzing trace with hash 230214471, now seen corresponding path program 11 times [2024-06-21 17:07:06,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:06,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460953865] [2024-06-21 17:07:06,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:06,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:07,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:07,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460953865] [2024-06-21 17:07:07,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460953865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:07,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:07,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:07,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987862108] [2024-06-21 17:07:07,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:07,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:07,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:07,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:07,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:07,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:07,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 116 transitions, 968 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:07,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:07,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:07,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:07,527 INFO L124 PetriNetUnfolderBase]: 292/631 cut-off events. [2024-06-21 17:07:07,527 INFO L125 PetriNetUnfolderBase]: For 20111/20111 co-relation queries the response was YES. [2024-06-21 17:07:07,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2791 conditions, 631 events. 292/631 cut-off events. For 20111/20111 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3243 event pairs, 72 based on Foata normal form. 8/634 useless extension candidates. Maximal degree in co-relation 2720. Up to 408 conditions per place. [2024-06-21 17:07:07,530 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 73 selfloop transitions, 44 changer transitions 12/133 dead transitions. [2024-06-21 17:07:07,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 133 transitions, 1294 flow [2024-06-21 17:07:07,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:07:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:07:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 165 transitions. [2024-06-21 17:07:07,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39663461538461536 [2024-06-21 17:07:07,531 INFO L175 Difference]: Start difference. First operand has 172 places, 116 transitions, 968 flow. Second operand 13 states and 165 transitions. [2024-06-21 17:07:07,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 133 transitions, 1294 flow [2024-06-21 17:07:07,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 133 transitions, 1215 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-21 17:07:07,564 INFO L231 Difference]: Finished difference. Result has 171 places, 111 transitions, 948 flow [2024-06-21 17:07:07,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=948, PETRI_PLACES=171, PETRI_TRANSITIONS=111} [2024-06-21 17:07:07,564 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 140 predicate places. [2024-06-21 17:07:07,564 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 111 transitions, 948 flow [2024-06-21 17:07:07,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:07,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:07,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:07,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:07:07,565 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:07,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:07,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1791097927, now seen corresponding path program 12 times [2024-06-21 17:07:07,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:07,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471638542] [2024-06-21 17:07:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:07,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:08,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:08,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471638542] [2024-06-21 17:07:08,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471638542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:08,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:08,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:08,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042247656] [2024-06-21 17:07:08,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:08,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:08,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:08,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:08,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:08,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:08,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 111 transitions, 948 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:08,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:08,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:08,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:09,103 INFO L124 PetriNetUnfolderBase]: 265/572 cut-off events. [2024-06-21 17:07:09,103 INFO L125 PetriNetUnfolderBase]: For 12350/12350 co-relation queries the response was YES. [2024-06-21 17:07:09,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2307 conditions, 572 events. 265/572 cut-off events. For 12350/12350 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2852 event pairs, 61 based on Foata normal form. 6/575 useless extension candidates. Maximal degree in co-relation 2236. Up to 397 conditions per place. [2024-06-21 17:07:09,105 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 77 selfloop transitions, 30 changer transitions 14/125 dead transitions. [2024-06-21 17:07:09,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 125 transitions, 1220 flow [2024-06-21 17:07:09,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:07:09,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:07:09,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-21 17:07:09,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-21 17:07:09,112 INFO L175 Difference]: Start difference. First operand has 171 places, 111 transitions, 948 flow. Second operand 12 states and 150 transitions. [2024-06-21 17:07:09,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 125 transitions, 1220 flow [2024-06-21 17:07:09,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 125 transitions, 1112 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-21 17:07:09,132 INFO L231 Difference]: Finished difference. Result has 163 places, 105 transitions, 858 flow [2024-06-21 17:07:09,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=858, PETRI_PLACES=163, PETRI_TRANSITIONS=105} [2024-06-21 17:07:09,132 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 132 predicate places. [2024-06-21 17:07:09,133 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 105 transitions, 858 flow [2024-06-21 17:07:09,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:09,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:09,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:09,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:07:09,133 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:09,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:09,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1093767227, now seen corresponding path program 1 times [2024-06-21 17:07:09,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:09,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031154933] [2024-06-21 17:07:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:09,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:09,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:09,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031154933] [2024-06-21 17:07:09,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031154933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:09,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:09,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:09,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109872168] [2024-06-21 17:07:09,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:09,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:09,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:09,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:09,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:10,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:10,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 105 transitions, 858 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:10,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:10,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:10,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:10,424 INFO L124 PetriNetUnfolderBase]: 263/558 cut-off events. [2024-06-21 17:07:10,424 INFO L125 PetriNetUnfolderBase]: For 11279/11279 co-relation queries the response was YES. [2024-06-21 17:07:10,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 558 events. 263/558 cut-off events. For 11279/11279 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2734 event pairs, 53 based on Foata normal form. 6/559 useless extension candidates. Maximal degree in co-relation 2102. Up to 352 conditions per place. [2024-06-21 17:07:10,427 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 75 selfloop transitions, 29 changer transitions 15/123 dead transitions. [2024-06-21 17:07:10,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 123 transitions, 1144 flow [2024-06-21 17:07:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:10,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-21 17:07:10,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:07:10,428 INFO L175 Difference]: Start difference. First operand has 163 places, 105 transitions, 858 flow. Second operand 10 states and 132 transitions. [2024-06-21 17:07:10,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 123 transitions, 1144 flow [2024-06-21 17:07:10,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 123 transitions, 1061 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 17:07:10,446 INFO L231 Difference]: Finished difference. Result has 154 places, 100 transitions, 792 flow [2024-06-21 17:07:10,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=792, PETRI_PLACES=154, PETRI_TRANSITIONS=100} [2024-06-21 17:07:10,447 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 123 predicate places. [2024-06-21 17:07:10,447 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 100 transitions, 792 flow [2024-06-21 17:07:10,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:10,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:10,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:10,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:07:10,447 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:10,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:10,448 INFO L85 PathProgramCache]: Analyzing trace with hash -394329619, now seen corresponding path program 2 times [2024-06-21 17:07:10,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:10,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925525764] [2024-06-21 17:07:10,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:10,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:11,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:11,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925525764] [2024-06-21 17:07:11,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925525764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:11,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:11,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:07:11,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788038594] [2024-06-21 17:07:11,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:11,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:07:11,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:07:11,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:07:11,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:11,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 100 transitions, 792 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:11,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:11,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:11,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:11,651 INFO L124 PetriNetUnfolderBase]: 260/558 cut-off events. [2024-06-21 17:07:11,651 INFO L125 PetriNetUnfolderBase]: For 9731/9731 co-relation queries the response was YES. [2024-06-21 17:07:11,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2095 conditions, 558 events. 260/558 cut-off events. For 9731/9731 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2733 event pairs, 51 based on Foata normal form. 6/560 useless extension candidates. Maximal degree in co-relation 2029. Up to 428 conditions per place. [2024-06-21 17:07:11,653 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 88 selfloop transitions, 14 changer transitions 21/127 dead transitions. [2024-06-21 17:07:11,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 127 transitions, 1126 flow [2024-06-21 17:07:11,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-21 17:07:11,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 17:07:11,654 INFO L175 Difference]: Start difference. First operand has 154 places, 100 transitions, 792 flow. Second operand 11 states and 143 transitions. [2024-06-21 17:07:11,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 127 transitions, 1126 flow [2024-06-21 17:07:11,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 127 transitions, 1061 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 17:07:11,670 INFO L231 Difference]: Finished difference. Result has 157 places, 101 transitions, 781 flow [2024-06-21 17:07:11,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=781, PETRI_PLACES=157, PETRI_TRANSITIONS=101} [2024-06-21 17:07:11,671 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 126 predicate places. [2024-06-21 17:07:11,671 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 101 transitions, 781 flow [2024-06-21 17:07:11,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:11,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:11,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:11,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:07:11,671 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:11,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:11,671 INFO L85 PathProgramCache]: Analyzing trace with hash 489095133, now seen corresponding path program 3 times [2024-06-21 17:07:11,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:11,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853811480] [2024-06-21 17:07:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:11,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:12,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:12,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853811480] [2024-06-21 17:07:12,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853811480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:12,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:12,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:12,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918296973] [2024-06-21 17:07:12,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:12,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:12,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:12,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:12,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:12,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:12,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 101 transitions, 781 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:12,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:12,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:12,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:12,864 INFO L124 PetriNetUnfolderBase]: 248/535 cut-off events. [2024-06-21 17:07:12,864 INFO L125 PetriNetUnfolderBase]: For 9273/9273 co-relation queries the response was YES. [2024-06-21 17:07:12,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 535 events. 248/535 cut-off events. For 9273/9273 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2617 event pairs, 51 based on Foata normal form. 6/537 useless extension candidates. Maximal degree in co-relation 1931. Up to 337 conditions per place. [2024-06-21 17:07:12,873 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 81 selfloop transitions, 19 changer transitions 16/120 dead transitions. [2024-06-21 17:07:12,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 120 transitions, 1061 flow [2024-06-21 17:07:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-21 17:07:12,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 17:07:12,874 INFO L175 Difference]: Start difference. First operand has 157 places, 101 transitions, 781 flow. Second operand 10 states and 130 transitions. [2024-06-21 17:07:12,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 120 transitions, 1061 flow [2024-06-21 17:07:12,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 120 transitions, 1025 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 17:07:12,894 INFO L231 Difference]: Finished difference. Result has 155 places, 98 transitions, 768 flow [2024-06-21 17:07:12,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=768, PETRI_PLACES=155, PETRI_TRANSITIONS=98} [2024-06-21 17:07:12,894 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 124 predicate places. [2024-06-21 17:07:12,894 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 98 transitions, 768 flow [2024-06-21 17:07:12,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:12,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:12,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:12,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:07:12,894 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:12,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:12,895 INFO L85 PathProgramCache]: Analyzing trace with hash -361200753, now seen corresponding path program 4 times [2024-06-21 17:07:12,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:12,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555245300] [2024-06-21 17:07:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:12,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:13,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:13,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555245300] [2024-06-21 17:07:13,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555245300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:13,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:13,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:13,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635948228] [2024-06-21 17:07:13,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:13,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:13,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:13,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:13,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:13,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:13,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 98 transitions, 768 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:13,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:13,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:13,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:14,116 INFO L124 PetriNetUnfolderBase]: 228/499 cut-off events. [2024-06-21 17:07:14,116 INFO L125 PetriNetUnfolderBase]: For 9261/9261 co-relation queries the response was YES. [2024-06-21 17:07:14,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1891 conditions, 499 events. 228/499 cut-off events. For 9261/9261 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2383 event pairs, 51 based on Foata normal form. 6/501 useless extension candidates. Maximal degree in co-relation 1824. Up to 333 conditions per place. [2024-06-21 17:07:14,118 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 67 selfloop transitions, 21 changer transitions 20/112 dead transitions. [2024-06-21 17:07:14,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 112 transitions, 1016 flow [2024-06-21 17:07:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-21 17:07:14,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-21 17:07:14,119 INFO L175 Difference]: Start difference. First operand has 155 places, 98 transitions, 768 flow. Second operand 10 states and 129 transitions. [2024-06-21 17:07:14,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 112 transitions, 1016 flow [2024-06-21 17:07:14,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 112 transitions, 968 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 17:07:14,134 INFO L231 Difference]: Finished difference. Result has 150 places, 86 transitions, 659 flow [2024-06-21 17:07:14,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=659, PETRI_PLACES=150, PETRI_TRANSITIONS=86} [2024-06-21 17:07:14,134 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 119 predicate places. [2024-06-21 17:07:14,135 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 86 transitions, 659 flow [2024-06-21 17:07:14,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:14,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:14,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:14,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:07:14,135 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:14,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:14,135 INFO L85 PathProgramCache]: Analyzing trace with hash -379259691, now seen corresponding path program 5 times [2024-06-21 17:07:14,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:14,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903649808] [2024-06-21 17:07:14,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:14,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:15,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:15,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903649808] [2024-06-21 17:07:15,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903649808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:15,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:15,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:15,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787247816] [2024-06-21 17:07:15,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:15,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:15,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:15,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:15,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:15,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:15,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 86 transitions, 659 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:15,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:15,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:15,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:15,589 INFO L124 PetriNetUnfolderBase]: 210/463 cut-off events. [2024-06-21 17:07:15,589 INFO L125 PetriNetUnfolderBase]: For 8651/8651 co-relation queries the response was YES. [2024-06-21 17:07:15,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1710 conditions, 463 events. 210/463 cut-off events. For 8651/8651 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2135 event pairs, 60 based on Foata normal form. 6/467 useless extension candidates. Maximal degree in co-relation 1660. Up to 300 conditions per place. [2024-06-21 17:07:15,591 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 59 selfloop transitions, 28 changer transitions 13/104 dead transitions. [2024-06-21 17:07:15,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 104 transitions, 912 flow [2024-06-21 17:07:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 17:07:15,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-21 17:07:15,592 INFO L175 Difference]: Start difference. First operand has 150 places, 86 transitions, 659 flow. Second operand 11 states and 140 transitions. [2024-06-21 17:07:15,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 104 transitions, 912 flow [2024-06-21 17:07:15,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 104 transitions, 822 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-06-21 17:07:15,603 INFO L231 Difference]: Finished difference. Result has 139 places, 85 transitions, 630 flow [2024-06-21 17:07:15,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=630, PETRI_PLACES=139, PETRI_TRANSITIONS=85} [2024-06-21 17:07:15,603 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 108 predicate places. [2024-06-21 17:07:15,604 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 85 transitions, 630 flow [2024-06-21 17:07:15,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:15,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:15,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:15,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:07:15,604 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:15,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:15,604 INFO L85 PathProgramCache]: Analyzing trace with hash -21566051, now seen corresponding path program 6 times [2024-06-21 17:07:15,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:15,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433587889] [2024-06-21 17:07:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:15,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:16,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:16,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433587889] [2024-06-21 17:07:16,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433587889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:16,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:16,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:16,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905450625] [2024-06-21 17:07:16,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:16,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:16,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:16,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:16,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:16,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:16,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 85 transitions, 630 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:16,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:16,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:16,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:17,047 INFO L124 PetriNetUnfolderBase]: 203/448 cut-off events. [2024-06-21 17:07:17,047 INFO L125 PetriNetUnfolderBase]: For 8240/8240 co-relation queries the response was YES. [2024-06-21 17:07:17,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1606 conditions, 448 events. 203/448 cut-off events. For 8240/8240 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2048 event pairs, 60 based on Foata normal form. 6/452 useless extension candidates. Maximal degree in co-relation 1559. Up to 290 conditions per place. [2024-06-21 17:07:17,049 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 60 selfloop transitions, 24 changer transitions 13/101 dead transitions. [2024-06-21 17:07:17,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 101 transitions, 863 flow [2024-06-21 17:07:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 17:07:17,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38920454545454547 [2024-06-21 17:07:17,050 INFO L175 Difference]: Start difference. First operand has 139 places, 85 transitions, 630 flow. Second operand 11 states and 137 transitions. [2024-06-21 17:07:17,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 101 transitions, 863 flow [2024-06-21 17:07:17,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 101 transitions, 799 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 17:07:17,061 INFO L231 Difference]: Finished difference. Result has 138 places, 82 transitions, 601 flow [2024-06-21 17:07:17,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=601, PETRI_PLACES=138, PETRI_TRANSITIONS=82} [2024-06-21 17:07:17,061 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 107 predicate places. [2024-06-21 17:07:17,061 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 82 transitions, 601 flow [2024-06-21 17:07:17,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:17,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:17,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:17,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:07:17,062 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:17,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:17,062 INFO L85 PathProgramCache]: Analyzing trace with hash -771418471, now seen corresponding path program 7 times [2024-06-21 17:07:17,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:17,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434056203] [2024-06-21 17:07:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:17,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:18,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:18,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434056203] [2024-06-21 17:07:18,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434056203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:18,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:18,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:18,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956200206] [2024-06-21 17:07:18,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:18,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:18,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:18,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:18,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:18,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:18,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 82 transitions, 601 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:18,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:18,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:18,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:18,497 INFO L124 PetriNetUnfolderBase]: 192/427 cut-off events. [2024-06-21 17:07:18,497 INFO L125 PetriNetUnfolderBase]: For 8232/8232 co-relation queries the response was YES. [2024-06-21 17:07:18,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1531 conditions, 427 events. 192/427 cut-off events. For 8232/8232 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1912 event pairs, 58 based on Foata normal form. 6/431 useless extension candidates. Maximal degree in co-relation 1485. Up to 272 conditions per place. [2024-06-21 17:07:18,499 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 56 selfloop transitions, 24 changer transitions 13/97 dead transitions. [2024-06-21 17:07:18,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 97 transitions, 821 flow [2024-06-21 17:07:18,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:18,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:18,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 17:07:18,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-21 17:07:18,500 INFO L175 Difference]: Start difference. First operand has 138 places, 82 transitions, 601 flow. Second operand 11 states and 139 transitions. [2024-06-21 17:07:18,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 97 transitions, 821 flow [2024-06-21 17:07:18,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 97 transitions, 763 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 17:07:18,510 INFO L231 Difference]: Finished difference. Result has 135 places, 78 transitions, 571 flow [2024-06-21 17:07:18,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=571, PETRI_PLACES=135, PETRI_TRANSITIONS=78} [2024-06-21 17:07:18,511 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 104 predicate places. [2024-06-21 17:07:18,511 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 78 transitions, 571 flow [2024-06-21 17:07:18,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:18,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:18,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:18,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:07:18,511 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:18,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1860071091, now seen corresponding path program 8 times [2024-06-21 17:07:18,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:18,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479064473] [2024-06-21 17:07:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:18,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:19,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:19,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479064473] [2024-06-21 17:07:19,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479064473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:19,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:19,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:19,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642496842] [2024-06-21 17:07:19,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:19,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:19,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:19,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:19,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:19,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:19,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 78 transitions, 571 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:19,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:19,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:19,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:19,961 INFO L124 PetriNetUnfolderBase]: 185/414 cut-off events. [2024-06-21 17:07:19,961 INFO L125 PetriNetUnfolderBase]: For 8192/8192 co-relation queries the response was YES. [2024-06-21 17:07:19,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 414 events. 185/414 cut-off events. For 8192/8192 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1842 event pairs, 56 based on Foata normal form. 6/418 useless extension candidates. Maximal degree in co-relation 1433. Up to 254 conditions per place. [2024-06-21 17:07:19,962 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 53 selfloop transitions, 19 changer transitions 19/95 dead transitions. [2024-06-21 17:07:19,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 95 transitions, 792 flow [2024-06-21 17:07:19,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 17:07:19,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-21 17:07:19,970 INFO L175 Difference]: Start difference. First operand has 135 places, 78 transitions, 571 flow. Second operand 11 states and 139 transitions. [2024-06-21 17:07:19,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 95 transitions, 792 flow [2024-06-21 17:07:19,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 95 transitions, 709 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-21 17:07:19,980 INFO L231 Difference]: Finished difference. Result has 128 places, 71 transitions, 489 flow [2024-06-21 17:07:19,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=489, PETRI_PLACES=128, PETRI_TRANSITIONS=71} [2024-06-21 17:07:19,980 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 97 predicate places. [2024-06-21 17:07:19,980 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 71 transitions, 489 flow [2024-06-21 17:07:19,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:19,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:19,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:19,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:07:19,981 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:19,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:19,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1598023577, now seen corresponding path program 9 times [2024-06-21 17:07:19,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:19,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610048999] [2024-06-21 17:07:19,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:19,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:20,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:20,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610048999] [2024-06-21 17:07:20,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610048999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:20,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:20,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:20,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221312409] [2024-06-21 17:07:20,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:20,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:20,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:20,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:20,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:21,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:21,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 71 transitions, 489 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:21,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:21,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:21,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:21,370 INFO L124 PetriNetUnfolderBase]: 164/373 cut-off events. [2024-06-21 17:07:21,370 INFO L125 PetriNetUnfolderBase]: For 7262/7262 co-relation queries the response was YES. [2024-06-21 17:07:21,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1315 conditions, 373 events. 164/373 cut-off events. For 7262/7262 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1609 event pairs, 52 based on Foata normal form. 6/377 useless extension candidates. Maximal degree in co-relation 1271. Up to 228 conditions per place. [2024-06-21 17:07:21,371 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 48 selfloop transitions, 17 changer transitions 18/87 dead transitions. [2024-06-21 17:07:21,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 87 transitions, 691 flow [2024-06-21 17:07:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 17:07:21,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38920454545454547 [2024-06-21 17:07:21,372 INFO L175 Difference]: Start difference. First operand has 128 places, 71 transitions, 489 flow. Second operand 11 states and 137 transitions. [2024-06-21 17:07:21,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 87 transitions, 691 flow [2024-06-21 17:07:21,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 87 transitions, 647 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 17:07:21,379 INFO L231 Difference]: Finished difference. Result has 123 places, 64 transitions, 445 flow [2024-06-21 17:07:21,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=445, PETRI_PLACES=123, PETRI_TRANSITIONS=64} [2024-06-21 17:07:21,379 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 92 predicate places. [2024-06-21 17:07:21,380 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 64 transitions, 445 flow [2024-06-21 17:07:21,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:21,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:21,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:21,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:07:21,380 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:21,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:21,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1487795703, now seen corresponding path program 10 times [2024-06-21 17:07:21,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:21,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038012416] [2024-06-21 17:07:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:21,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:22,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:22,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038012416] [2024-06-21 17:07:22,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038012416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:22,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:22,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:22,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734210944] [2024-06-21 17:07:22,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:22,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:22,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:22,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:22,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:22,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:22,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 64 transitions, 445 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:22,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:22,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:22,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:22,563 INFO L124 PetriNetUnfolderBase]: 145/340 cut-off events. [2024-06-21 17:07:22,563 INFO L125 PetriNetUnfolderBase]: For 6893/6893 co-relation queries the response was YES. [2024-06-21 17:07:22,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1207 conditions, 340 events. 145/340 cut-off events. For 6893/6893 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1424 event pairs, 44 based on Foata normal form. 6/344 useless extension candidates. Maximal degree in co-relation 1165. Up to 110 conditions per place. [2024-06-21 17:07:22,564 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 37 selfloop transitions, 15 changer transitions 25/81 dead transitions. [2024-06-21 17:07:22,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 81 transitions, 637 flow [2024-06-21 17:07:22,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:22,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 17:07:22,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-21 17:07:22,565 INFO L175 Difference]: Start difference. First operand has 123 places, 64 transitions, 445 flow. Second operand 11 states and 140 transitions. [2024-06-21 17:07:22,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 81 transitions, 637 flow [2024-06-21 17:07:22,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 81 transitions, 595 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 17:07:22,572 INFO L231 Difference]: Finished difference. Result has 116 places, 49 transitions, 334 flow [2024-06-21 17:07:22,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=334, PETRI_PLACES=116, PETRI_TRANSITIONS=49} [2024-06-21 17:07:22,572 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 85 predicate places. [2024-06-21 17:07:22,572 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 49 transitions, 334 flow [2024-06-21 17:07:22,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:22,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:22,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:22,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:07:22,573 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:22,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:22,573 INFO L85 PathProgramCache]: Analyzing trace with hash 76349329, now seen corresponding path program 11 times [2024-06-21 17:07:22,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:22,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375898661] [2024-06-21 17:07:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:22,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:23,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:23,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375898661] [2024-06-21 17:07:23,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375898661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:23,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:23,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:23,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422370550] [2024-06-21 17:07:23,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:23,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:23,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:23,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:23,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:23,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:23,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 49 transitions, 334 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:23,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:23,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:23,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:23,944 INFO L124 PetriNetUnfolderBase]: 107/249 cut-off events. [2024-06-21 17:07:23,945 INFO L125 PetriNetUnfolderBase]: For 5591/5591 co-relation queries the response was YES. [2024-06-21 17:07:23,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 249 events. 107/249 cut-off events. For 5591/5591 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 902 event pairs, 38 based on Foata normal form. 6/253 useless extension candidates. Maximal degree in co-relation 878. Up to 106 conditions per place. [2024-06-21 17:07:23,946 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 34 selfloop transitions, 15 changer transitions 12/65 dead transitions. [2024-06-21 17:07:23,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 65 transitions, 492 flow [2024-06-21 17:07:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 17:07:23,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39204545454545453 [2024-06-21 17:07:23,946 INFO L175 Difference]: Start difference. First operand has 116 places, 49 transitions, 334 flow. Second operand 11 states and 138 transitions. [2024-06-21 17:07:23,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 65 transitions, 492 flow [2024-06-21 17:07:23,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 65 transitions, 435 flow, removed 8 selfloop flow, removed 15 redundant places. [2024-06-21 17:07:23,951 INFO L231 Difference]: Finished difference. Result has 97 places, 45 transitions, 292 flow [2024-06-21 17:07:23,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=292, PETRI_PLACES=97, PETRI_TRANSITIONS=45} [2024-06-21 17:07:23,952 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 66 predicate places. [2024-06-21 17:07:23,952 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 45 transitions, 292 flow [2024-06-21 17:07:23,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:23,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:23,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:23,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:07:23,952 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:23,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:23,952 INFO L85 PathProgramCache]: Analyzing trace with hash -244924873, now seen corresponding path program 12 times [2024-06-21 17:07:23,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:23,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957680056] [2024-06-21 17:07:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:23,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:24,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:24,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957680056] [2024-06-21 17:07:24,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957680056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:24,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:24,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:24,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573400996] [2024-06-21 17:07:24,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:24,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:24,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:24,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:24,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:25,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:25,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 45 transitions, 292 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:25,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:25,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:25,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:25,231 INFO L124 PetriNetUnfolderBase]: 93/223 cut-off events. [2024-06-21 17:07:25,231 INFO L125 PetriNetUnfolderBase]: For 3608/3608 co-relation queries the response was YES. [2024-06-21 17:07:25,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 791 conditions, 223 events. 93/223 cut-off events. For 3608/3608 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 775 event pairs, 38 based on Foata normal form. 6/227 useless extension candidates. Maximal degree in co-relation 758. Up to 130 conditions per place. [2024-06-21 17:07:25,232 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 33 selfloop transitions, 9 changer transitions 14/60 dead transitions. [2024-06-21 17:07:25,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 60 transitions, 438 flow [2024-06-21 17:07:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 17:07:25,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-21 17:07:25,233 INFO L175 Difference]: Start difference. First operand has 97 places, 45 transitions, 292 flow. Second operand 11 states and 136 transitions. [2024-06-21 17:07:25,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 60 transitions, 438 flow [2024-06-21 17:07:25,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 60 transitions, 398 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 17:07:25,236 INFO L231 Difference]: Finished difference. Result has 91 places, 40 transitions, 249 flow [2024-06-21 17:07:25,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=249, PETRI_PLACES=91, PETRI_TRANSITIONS=40} [2024-06-21 17:07:25,236 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 60 predicate places. [2024-06-21 17:07:25,236 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 40 transitions, 249 flow [2024-06-21 17:07:25,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:25,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:25,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:25,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:07:25,237 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:25,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:25,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1798512507, now seen corresponding path program 13 times [2024-06-21 17:07:25,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:25,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696093717] [2024-06-21 17:07:25,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:25,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:26,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:26,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696093717] [2024-06-21 17:07:26,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696093717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:26,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:26,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:26,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382300451] [2024-06-21 17:07:26,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:26,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:26,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:26,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:26,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:26,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:26,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 40 transitions, 249 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:26,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:26,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:26,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:26,721 INFO L124 PetriNetUnfolderBase]: 81/197 cut-off events. [2024-06-21 17:07:26,721 INFO L125 PetriNetUnfolderBase]: For 2762/2762 co-relation queries the response was YES. [2024-06-21 17:07:26,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 197 events. 81/197 cut-off events. For 2762/2762 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 635 event pairs, 36 based on Foata normal form. 6/201 useless extension candidates. Maximal degree in co-relation 655. Up to 112 conditions per place. [2024-06-21 17:07:26,722 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 29 selfloop transitions, 7 changer transitions 15/55 dead transitions. [2024-06-21 17:07:26,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 55 transitions, 385 flow [2024-06-21 17:07:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 17:07:26,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806818181818182 [2024-06-21 17:07:26,723 INFO L175 Difference]: Start difference. First operand has 91 places, 40 transitions, 249 flow. Second operand 11 states and 134 transitions. [2024-06-21 17:07:26,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 55 transitions, 385 flow [2024-06-21 17:07:26,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 55 transitions, 351 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 17:07:26,725 INFO L231 Difference]: Finished difference. Result has 83 places, 34 transitions, 204 flow [2024-06-21 17:07:26,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=204, PETRI_PLACES=83, PETRI_TRANSITIONS=34} [2024-06-21 17:07:26,726 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-21 17:07:26,726 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 34 transitions, 204 flow [2024-06-21 17:07:26,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:26,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:26,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:26,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:07:26,726 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:26,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:26,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1189886153, now seen corresponding path program 14 times [2024-06-21 17:07:26,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:26,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573065491] [2024-06-21 17:07:26,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:26,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:27,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:27,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573065491] [2024-06-21 17:07:27,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573065491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:27,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:27,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:27,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662445970] [2024-06-21 17:07:27,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:27,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:27,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:27,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:27,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:27,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:27,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 34 transitions, 204 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:27,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:27,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:27,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:28,158 INFO L124 PetriNetUnfolderBase]: 68/166 cut-off events. [2024-06-21 17:07:28,158 INFO L125 PetriNetUnfolderBase]: For 2262/2262 co-relation queries the response was YES. [2024-06-21 17:07:28,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 166 events. 68/166 cut-off events. For 2262/2262 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 473 event pairs, 40 based on Foata normal form. 6/170 useless extension candidates. Maximal degree in co-relation 551. Up to 94 conditions per place. [2024-06-21 17:07:28,159 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 19 selfloop transitions, 3 changer transitions 24/50 dead transitions. [2024-06-21 17:07:28,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 50 transitions, 332 flow [2024-06-21 17:07:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:07:28,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:07:28,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 17:07:28,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3671875 [2024-06-21 17:07:28,159 INFO L175 Difference]: Start difference. First operand has 83 places, 34 transitions, 204 flow. Second operand 12 states and 141 transitions. [2024-06-21 17:07:28,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 50 transitions, 332 flow [2024-06-21 17:07:28,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 50 transitions, 308 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 17:07:28,161 INFO L231 Difference]: Finished difference. Result has 75 places, 25 transitions, 138 flow [2024-06-21 17:07:28,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=138, PETRI_PLACES=75, PETRI_TRANSITIONS=25} [2024-06-21 17:07:28,161 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-21 17:07:28,161 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 25 transitions, 138 flow [2024-06-21 17:07:28,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:28,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:28,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:28,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:07:28,162 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:28,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:28,162 INFO L85 PathProgramCache]: Analyzing trace with hash 174397953, now seen corresponding path program 15 times [2024-06-21 17:07:28,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:28,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040745460] [2024-06-21 17:07:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:28,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:29,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:29,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040745460] [2024-06-21 17:07:29,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040745460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:29,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:29,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:29,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455475984] [2024-06-21 17:07:29,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:29,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:29,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:29,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:29,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:29,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-21 17:07:29,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 25 transitions, 138 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:29,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:29,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-21 17:07:29,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:29,294 INFO L124 PetriNetUnfolderBase]: 38/91 cut-off events. [2024-06-21 17:07:29,294 INFO L125 PetriNetUnfolderBase]: For 730/730 co-relation queries the response was YES. [2024-06-21 17:07:29,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 91 events. 38/91 cut-off events. For 730/730 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 168 event pairs, 2 based on Foata normal form. 6/94 useless extension candidates. Maximal degree in co-relation 246. Up to 24 conditions per place. [2024-06-21 17:07:29,294 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2024-06-21 17:07:29,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 37 transitions, 200 flow [2024-06-21 17:07:29,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 17:07:29,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.353125 [2024-06-21 17:07:29,308 INFO L175 Difference]: Start difference. First operand has 75 places, 25 transitions, 138 flow. Second operand 10 states and 113 transitions. [2024-06-21 17:07:29,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 37 transitions, 200 flow [2024-06-21 17:07:29,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 37 transitions, 163 flow, removed 2 selfloop flow, removed 17 redundant places. [2024-06-21 17:07:29,309 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2024-06-21 17:07:29,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2024-06-21 17:07:29,309 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 19 predicate places. [2024-06-21 17:07:29,309 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2024-06-21 17:07:29,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:29,311 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 17:07:29,313 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 17:07:29,313 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 17:07:29,313 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 17:07:29,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:07:29,314 INFO L445 BasicCegarLoop]: Path program histogram: [15, 12, 11, 9, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:29,316 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 17:07:29,316 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 17:07:29,318 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 17:07:29,319 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 17:07:29,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 05:07:29 BasicIcfg [2024-06-21 17:07:29,319 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 17:07:29,320 INFO L158 Benchmark]: Toolchain (without parser) took 105925.91ms. Allocated memory was 142.6MB in the beginning and 723.5MB in the end (delta: 580.9MB). Free memory was 79.8MB in the beginning and 311.6MB in the end (delta: -231.9MB). Peak memory consumption was 351.1MB. Max. memory is 16.1GB. [2024-06-21 17:07:29,320 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 142.6MB. Free memory was 102.3MB in the beginning and 102.1MB in the end (delta: 176.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 17:07:29,320 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 96.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 17:07:29,320 INFO L158 Benchmark]: CACSL2BoogieTranslator took 545.32ms. Allocated memory was 142.6MB in the beginning and 182.5MB in the end (delta: 39.8MB). Free memory was 79.3MB in the beginning and 143.1MB in the end (delta: -63.8MB). Peak memory consumption was 28.9MB. Max. memory is 16.1GB. [2024-06-21 17:07:29,320 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.38ms. Allocated memory is still 182.5MB. Free memory was 143.1MB in the beginning and 141.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 17:07:29,320 INFO L158 Benchmark]: Boogie Preprocessor took 49.74ms. Allocated memory is still 182.5MB. Free memory was 141.0MB in the beginning and 137.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 17:07:29,320 INFO L158 Benchmark]: RCFGBuilder took 600.57ms. Allocated memory is still 182.5MB. Free memory was 137.8MB in the beginning and 91.7MB in the end (delta: 46.1MB). Peak memory consumption was 46.1MB. Max. memory is 16.1GB. [2024-06-21 17:07:29,320 INFO L158 Benchmark]: TraceAbstraction took 104672.90ms. Allocated memory was 182.5MB in the beginning and 723.5MB in the end (delta: 541.1MB). Free memory was 90.7MB in the beginning and 311.6MB in the end (delta: -220.9MB). Peak memory consumption was 320.1MB. Max. memory is 16.1GB. [2024-06-21 17:07:29,321 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.17ms. Allocated memory is still 142.6MB. Free memory was 102.3MB in the beginning and 102.1MB in the end (delta: 176.3kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 96.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 545.32ms. Allocated memory was 142.6MB in the beginning and 182.5MB in the end (delta: 39.8MB). Free memory was 79.3MB in the beginning and 143.1MB in the end (delta: -63.8MB). Peak memory consumption was 28.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.38ms. Allocated memory is still 182.5MB. Free memory was 143.1MB in the beginning and 141.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.74ms. Allocated memory is still 182.5MB. Free memory was 141.0MB in the beginning and 137.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 600.57ms. Allocated memory is still 182.5MB. Free memory was 137.8MB in the beginning and 91.7MB in the end (delta: 46.1MB). Peak memory consumption was 46.1MB. Max. memory is 16.1GB. * TraceAbstraction took 104672.90ms. Allocated memory was 182.5MB in the beginning and 723.5MB in the end (delta: 541.1MB). Free memory was 90.7MB in the beginning and 311.6MB in the end (delta: -220.9MB). Peak memory consumption was 320.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 816]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 817]: 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, 52 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: 104.6s, OverallIterations: 91, TraceHistogramMax: 1, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 32.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6015 SdHoareTripleChecker+Valid, 19.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5034 mSDsluCounter, 4734 SdHoareTripleChecker+Invalid, 16.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4304 mSDsCounter, 902 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 32265 IncrementalHoareTripleChecker+Invalid, 33167 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 902 mSolverCounterUnsat, 430 mSDtfsCounter, 32265 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 955 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 955 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 27.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1322occurred in iteration=53, InterpolantAutomatonStates: 853, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 70.8s InterpolantComputationTime, 1553 NumberOfCodeBlocks, 1553 NumberOfCodeBlocksAsserted, 91 NumberOfCheckSat, 1462 ConstructedInterpolants, 0 QuantifiedInterpolants, 70357 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 91 InterpolantComputations, 91 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 17:07:29,348 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