./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:19:06,758 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:19:06,799 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:19:06,802 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:19:06,803 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:19:06,817 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:19:06,818 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:19:06,818 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:19:06,818 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:19:06,818 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:19:06,819 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:19:06,819 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:19:06,819 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:19:06,820 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:19:06,823 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:19:06,824 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:19:06,824 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:19:06,824 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:19:06,824 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:19:06,825 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:19:06,825 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:19:06,827 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:19:06,827 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:19:06,828 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:19:06,828 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:19:06,828 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:19:06,828 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:19:06,828 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:19:06,829 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:19:06,829 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:19:06,829 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:19:06,829 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:19:06,829 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:19:06,830 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:19:06,830 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:19:06,830 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:19:06,830 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:19:06,830 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:19:06,831 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:19:06,831 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:19:06,831 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:19:06,844 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:19:06,844 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:19:06,844 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:19:07,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:19:07,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:19:07,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:19:07,041 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:19:07,041 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:19:07,042 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.i [2024-06-27 20:19:07,999 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:19:08,199 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:19:08,200 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.i [2024-06-27 20:19:08,211 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a09ec1de/93cbd960c83d4190b15831a901b7f121/FLAG8518983a8 [2024-06-27 20:19:08,222 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a09ec1de/93cbd960c83d4190b15831a901b7f121 [2024-06-27 20:19:08,224 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:19:08,225 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:19:08,225 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.yml/witness.yml [2024-06-27 20:19:08,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:19:08,357 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:19:08,359 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:19:08,359 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:19:08,362 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:19:08,363 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:19:08" (1/2) ... [2024-06-27 20:19:08,364 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b14f3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:19:08, skipping insertion in model container [2024-06-27 20:19:08,364 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:19:08" (1/2) ... [2024-06-27 20:19:08,366 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6c15f3f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:19:08, skipping insertion in model container [2024-06-27 20:19:08,366 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:19:08" (2/2) ... [2024-06-27 20:19:08,366 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b14f3f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:19:08, skipping insertion in model container [2024-06-27 20:19:08,367 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:19:08" (2/2) ... [2024-06-27 20:19:08,367 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:19:08,421 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:19:08,423 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-27 20:19:08,423 INFO L97 edCorrectnessWitness]: Location invariant before [L820-L820] ((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-27 20:19:08,423 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:19:08,423 INFO L106 edCorrectnessWitness]: ghost_update [L818-L818] multithreaded = 1; [2024-06-27 20:19:08,466 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:19:08,736 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:19:08,747 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:19:08,857 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:19:08,887 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:19:08,888 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:19:08 WrapperNode [2024-06-27 20:19:08,888 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:19:08,888 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:19:08,888 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:19:08,888 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:19:08,893 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:19:08" (1/1) ... [2024-06-27 20:19:08,904 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:19:08" (1/1) ... [2024-06-27 20:19:08,925 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 115 [2024-06-27 20:19:08,925 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:19:08,926 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:19:08,926 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:19:08,927 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:19:08,935 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:19:08" (1/1) ... [2024-06-27 20:19:08,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:19:08" (1/1) ... [2024-06-27 20:19:08,937 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:19:08" (1/1) ... [2024-06-27 20:19:08,951 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 20:19:08,952 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:19:08" (1/1) ... [2024-06-27 20:19:08,952 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:19:08" (1/1) ... [2024-06-27 20:19:08,969 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:19:08" (1/1) ... [2024-06-27 20:19:08,971 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:19:08" (1/1) ... [2024-06-27 20:19:08,976 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:19:08" (1/1) ... [2024-06-27 20:19:08,977 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:19:08" (1/1) ... [2024-06-27 20:19:08,979 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:19:08,980 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:19:08,980 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:19:08,980 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:19:08,981 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:19:08" (1/1) ... [2024-06-27 20:19:09,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:19:09,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:19:09,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 20:19:09,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 20:19:09,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:19:09,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:19:09,053 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:19:09,053 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:19:09,053 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:19:09,053 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:19:09,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:19:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:19:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:19:09,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:19:09,055 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:19:09,174 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:19:09,176 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:19:09,421 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:19:09,422 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:19:09,543 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:19:09,543 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:19:09,545 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:19:09 BoogieIcfgContainer [2024-06-27 20:19:09,545 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:19:09,547 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:19:09,547 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:19:09,549 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:19:09,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:19:08" (1/4) ... [2024-06-27 20:19:09,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b18109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:19:09, skipping insertion in model container [2024-06-27 20:19:09,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:19:08" (2/4) ... [2024-06-27 20:19:09,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b18109 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:19:09, skipping insertion in model container [2024-06-27 20:19:09,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:19:08" (3/4) ... [2024-06-27 20:19:09,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b18109 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:19:09, skipping insertion in model container [2024-06-27 20:19:09,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:19:09" (4/4) ... [2024-06-27 20:19:09,555 INFO L112 eAbstractionObserver]: Analyzing ICFG mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.i [2024-06-27 20:19:09,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:19:09,568 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-27 20:19:09,568 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:19:09,597 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:19:09,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-27 20:19:09,645 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-27 20:19:09,645 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:19:09,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:19:09,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-27 20:19:09,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-27 20:19:09,659 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:19:09,665 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;@eca892c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:19:09,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 20:19:09,668 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:19:09,668 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:19:09,668 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:19:09,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:09,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:19:09,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:09,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:09,672 INFO L85 PathProgramCache]: Analyzing trace with hash 332681745, now seen corresponding path program 1 times [2024-06-27 20:19:09,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:09,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701448177] [2024-06-27 20:19:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:09,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:10,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:10,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701448177] [2024-06-27 20:19:10,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701448177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:10,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:10,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:19:10,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421272171] [2024-06-27 20:19:10,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:10,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:19:10,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:10,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:19:10,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:19:10,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-27 20:19:10,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:10,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:10,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-27 20:19:10,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:10,518 INFO L124 PetriNetUnfolderBase]: 153/293 cut-off events. [2024-06-27 20:19:10,518 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-27 20:19:10,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 293 events. 153/293 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1091 event pairs, 89 based on Foata normal form. 1/282 useless extension candidates. Maximal degree in co-relation 575. Up to 272 conditions per place. [2024-06-27 20:19:10,523 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 21 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-27 20:19:10,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 115 flow [2024-06-27 20:19:10,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:19:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:19:10,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-06-27 20:19:10,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6021505376344086 [2024-06-27 20:19:10,533 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 56 transitions. [2024-06-27 20:19:10,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 115 flow [2024-06-27 20:19:10,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 20:19:10,538 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-27 20:19:10,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-27 20:19:10,541 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-27 20:19:10,542 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-27 20:19:10,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:10,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:10,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:10,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:19:10,543 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:10,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:10,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1879593136, now seen corresponding path program 1 times [2024-06-27 20:19:10,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:10,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633087313] [2024-06-27 20:19:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:10,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:10,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:10,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633087313] [2024-06-27 20:19:10,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633087313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:10,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:10,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:19:10,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508368790] [2024-06-27 20:19:10,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:10,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:19:10,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:10,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:19:10,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:19:10,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-27 20:19:10,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:10,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:10,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-27 20:19:10,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:11,050 INFO L124 PetriNetUnfolderBase]: 150/293 cut-off events. [2024-06-27 20:19:11,051 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-06-27 20:19:11,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 293 events. 150/293 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1077 event pairs, 68 based on Foata normal form. 2/291 useless extension candidates. Maximal degree in co-relation 649. Up to 258 conditions per place. [2024-06-27 20:19:11,055 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 25 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-27 20:19:11,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 157 flow [2024-06-27 20:19:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:19:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:19:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-06-27 20:19:11,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-27 20:19:11,057 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 72 transitions. [2024-06-27 20:19:11,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 157 flow [2024-06-27 20:19:11,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:19:11,058 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-27 20:19:11,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-27 20:19:11,059 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-27 20:19:11,059 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-27 20:19:11,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:11,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:11,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:11,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:19:11,059 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:11,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:11,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1892209841, now seen corresponding path program 1 times [2024-06-27 20:19:11,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:11,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580273083] [2024-06-27 20:19:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:11,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:11,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:11,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580273083] [2024-06-27 20:19:11,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580273083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:11,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:11,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:19:11,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279589079] [2024-06-27 20:19:11,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:11,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:19:11,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:11,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:19:11,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:19:11,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-27 20:19:11,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:11,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:11,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-27 20:19:11,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:11,861 INFO L124 PetriNetUnfolderBase]: 180/340 cut-off events. [2024-06-27 20:19:11,861 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2024-06-27 20:19:11,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 340 events. 180/340 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1248 event pairs, 52 based on Foata normal form. 2/336 useless extension candidates. Maximal degree in co-relation 838. Up to 291 conditions per place. [2024-06-27 20:19:11,863 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 34 selfloop transitions, 9 changer transitions 0/47 dead transitions. [2024-06-27 20:19:11,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 47 transitions, 238 flow [2024-06-27 20:19:11,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:19:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:19:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-27 20:19:11,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-06-27 20:19:11,867 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 6 states and 99 transitions. [2024-06-27 20:19:11,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 47 transitions, 238 flow [2024-06-27 20:19:11,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 226 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:19:11,871 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 134 flow [2024-06-27 20:19:11,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2024-06-27 20:19:11,872 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2024-06-27 20:19:11,873 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 134 flow [2024-06-27 20:19:11,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:11,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:11,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:11,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:19:11,873 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)] === [2024-06-27 20:19:11,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:11,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1968028297, now seen corresponding path program 1 times [2024-06-27 20:19:11,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:11,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093178727] [2024-06-27 20:19:11,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:11,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:12,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:12,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093178727] [2024-06-27 20:19:12,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093178727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:12,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:12,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:19:12,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239695630] [2024-06-27 20:19:12,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:12,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:19:12,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:12,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:19:12,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:19:12,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-27 20:19:12,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 134 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:12,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:12,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-27 20:19:12,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:12,690 INFO L124 PetriNetUnfolderBase]: 176/330 cut-off events. [2024-06-27 20:19:12,691 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2024-06-27 20:19:12,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 330 events. 176/330 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1165 event pairs, 30 based on Foata normal form. 4/326 useless extension candidates. Maximal degree in co-relation 911. Up to 265 conditions per place. [2024-06-27 20:19:12,693 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 34 selfloop transitions, 10 changer transitions 0/48 dead transitions. [2024-06-27 20:19:12,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 258 flow [2024-06-27 20:19:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:12,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:12,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 20:19:12,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023041474654378 [2024-06-27 20:19:12,697 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 134 flow. Second operand 7 states and 109 transitions. [2024-06-27 20:19:12,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 258 flow [2024-06-27 20:19:12,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 20:19:12,699 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 133 flow [2024-06-27 20:19:12,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=133, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2024-06-27 20:19:12,701 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-06-27 20:19:12,701 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 133 flow [2024-06-27 20:19:12,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:12,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:12,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:12,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:19:12,702 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)] === [2024-06-27 20:19:12,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:12,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1341926479, now seen corresponding path program 1 times [2024-06-27 20:19:12,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:12,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750137718] [2024-06-27 20:19:12,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:12,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:13,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:13,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750137718] [2024-06-27 20:19:13,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750137718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:13,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:13,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:19:13,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287832065] [2024-06-27 20:19:13,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:13,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:19:13,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:13,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:19:13,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:19:13,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-27 20:19:13,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 133 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:13,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:13,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-27 20:19:13,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:13,306 INFO L124 PetriNetUnfolderBase]: 174/327 cut-off events. [2024-06-27 20:19:13,306 INFO L125 PetriNetUnfolderBase]: For 461/461 co-relation queries the response was YES. [2024-06-27 20:19:13,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 327 events. 174/327 cut-off events. For 461/461 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1153 event pairs, 47 based on Foata normal form. 1/326 useless extension candidates. Maximal degree in co-relation 950. Up to 304 conditions per place. [2024-06-27 20:19:13,308 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 28 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2024-06-27 20:19:13,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 37 transitions, 219 flow [2024-06-27 20:19:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:19:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:19:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-06-27 20:19:13,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-27 20:19:13,309 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 133 flow. Second operand 5 states and 64 transitions. [2024-06-27 20:19:13,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 37 transitions, 219 flow [2024-06-27 20:19:13,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 195 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:13,311 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 136 flow [2024-06-27 20:19:13,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2024-06-27 20:19:13,312 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-06-27 20:19:13,312 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 136 flow [2024-06-27 20:19:13,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:13,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:13,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:13,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:19:13,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:13,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:13,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1349951301, now seen corresponding path program 1 times [2024-06-27 20:19:13,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:13,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957391692] [2024-06-27 20:19:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:13,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:13,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:13,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957391692] [2024-06-27 20:19:13,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957391692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:13,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:13,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:19:13,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992673976] [2024-06-27 20:19:13,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:13,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:19:13,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:13,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:19:13,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:19:13,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:13,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 136 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:13,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:13,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:13,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:13,996 INFO L124 PetriNetUnfolderBase]: 199/357 cut-off events. [2024-06-27 20:19:13,996 INFO L125 PetriNetUnfolderBase]: For 718/718 co-relation queries the response was YES. [2024-06-27 20:19:13,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1121 conditions, 357 events. 199/357 cut-off events. For 718/718 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1219 event pairs, 55 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 1101. Up to 343 conditions per place. [2024-06-27 20:19:13,998 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 30 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2024-06-27 20:19:13,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 234 flow [2024-06-27 20:19:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:19:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:19:13,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2024-06-27 20:19:13,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-27 20:19:14,000 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 136 flow. Second operand 6 states and 69 transitions. [2024-06-27 20:19:14,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 234 flow [2024-06-27 20:19:14,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 223 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 20:19:14,002 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 158 flow [2024-06-27 20:19:14,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2024-06-27 20:19:14,002 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-06-27 20:19:14,002 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 158 flow [2024-06-27 20:19:14,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:14,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:14,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:14,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:19:14,003 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:14,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:14,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2114279576, now seen corresponding path program 1 times [2024-06-27 20:19:14,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:14,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41615439] [2024-06-27 20:19:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:14,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:14,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:14,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41615439] [2024-06-27 20:19:14,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41615439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:14,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:14,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:19:14,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081961159] [2024-06-27 20:19:14,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:14,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:19:14,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:14,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:19:14,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:19:14,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-27 20:19:14,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:14,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:14,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-27 20:19:14,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:14,596 INFO L124 PetriNetUnfolderBase]: 188/348 cut-off events. [2024-06-27 20:19:14,596 INFO L125 PetriNetUnfolderBase]: For 991/991 co-relation queries the response was YES. [2024-06-27 20:19:14,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 348 events. 188/348 cut-off events. For 991/991 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1237 event pairs, 53 based on Foata normal form. 1/347 useless extension candidates. Maximal degree in co-relation 1142. Up to 304 conditions per place. [2024-06-27 20:19:14,599 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 33 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2024-06-27 20:19:14,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 298 flow [2024-06-27 20:19:14,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:19:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:19:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 80 transitions. [2024-06-27 20:19:14,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-06-27 20:19:14,600 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 158 flow. Second operand 6 states and 80 transitions. [2024-06-27 20:19:14,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 298 flow [2024-06-27 20:19:14,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 48 transitions, 281 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:19:14,602 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 188 flow [2024-06-27 20:19:14,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-06-27 20:19:14,603 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-27 20:19:14,603 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 188 flow [2024-06-27 20:19:14,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:14,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:14,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:14,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:19:14,604 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:14,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:14,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1931450704, now seen corresponding path program 2 times [2024-06-27 20:19:14,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:14,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999059991] [2024-06-27 20:19:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:14,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:15,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:15,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999059991] [2024-06-27 20:19:15,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999059991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:15,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:15,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:19:15,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418477538] [2024-06-27 20:19:15,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:15,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:19:15,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:15,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:19:15,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:19:15,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-27 20:19:15,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 188 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:15,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:15,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-27 20:19:15,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:15,238 INFO L124 PetriNetUnfolderBase]: 186/345 cut-off events. [2024-06-27 20:19:15,238 INFO L125 PetriNetUnfolderBase]: For 1268/1268 co-relation queries the response was YES. [2024-06-27 20:19:15,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1228 conditions, 345 events. 186/345 cut-off events. For 1268/1268 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1219 event pairs, 52 based on Foata normal form. 1/344 useless extension candidates. Maximal degree in co-relation 1206. Up to 314 conditions per place. [2024-06-27 20:19:15,240 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 32 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2024-06-27 20:19:15,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 282 flow [2024-06-27 20:19:15,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:19:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:19:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-06-27 20:19:15,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-27 20:19:15,241 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 188 flow. Second operand 6 states and 74 transitions. [2024-06-27 20:19:15,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 282 flow [2024-06-27 20:19:15,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 268 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 20:19:15,244 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 195 flow [2024-06-27 20:19:15,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2024-06-27 20:19:15,245 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2024-06-27 20:19:15,245 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 195 flow [2024-06-27 20:19:15,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:15,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:15,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:15,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:19:15,245 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:15,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:15,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1101183470, now seen corresponding path program 1 times [2024-06-27 20:19:15,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:15,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239648853] [2024-06-27 20:19:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:15,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:15,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:15,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239648853] [2024-06-27 20:19:15,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239648853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:15,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:15,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:15,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961244200] [2024-06-27 20:19:15,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:15,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:15,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:15,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:15,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:15,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:15,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 195 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:15,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:15,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:15,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:16,085 INFO L124 PetriNetUnfolderBase]: 194/350 cut-off events. [2024-06-27 20:19:16,086 INFO L125 PetriNetUnfolderBase]: For 1472/1472 co-relation queries the response was YES. [2024-06-27 20:19:16,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 350 events. 194/350 cut-off events. For 1472/1472 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1179 event pairs, 51 based on Foata normal form. 3/351 useless extension candidates. Maximal degree in co-relation 1242. Up to 327 conditions per place. [2024-06-27 20:19:16,088 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 37 selfloop transitions, 10 changer transitions 0/49 dead transitions. [2024-06-27 20:19:16,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 319 flow [2024-06-27 20:19:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:16,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-27 20:19:16,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-27 20:19:16,090 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 195 flow. Second operand 7 states and 80 transitions. [2024-06-27 20:19:16,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 319 flow [2024-06-27 20:19:16,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 295 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:16,094 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 210 flow [2024-06-27 20:19:16,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=210, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2024-06-27 20:19:16,095 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2024-06-27 20:19:16,095 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 210 flow [2024-06-27 20:19:16,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:16,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:16,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:16,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:19:16,096 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:16,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:16,096 INFO L85 PathProgramCache]: Analyzing trace with hash -400432360, now seen corresponding path program 1 times [2024-06-27 20:19:16,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:16,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955104710] [2024-06-27 20:19:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:16,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:16,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:16,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955104710] [2024-06-27 20:19:16,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955104710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:16,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:16,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:16,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770369790] [2024-06-27 20:19:16,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:16,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:16,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:16,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:16,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:16,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-27 20:19:16,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 210 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-27 20:19:16,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:16,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-27 20:19:16,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:16,862 INFO L124 PetriNetUnfolderBase]: 183/341 cut-off events. [2024-06-27 20:19:16,862 INFO L125 PetriNetUnfolderBase]: For 1715/1715 co-relation queries the response was YES. [2024-06-27 20:19:16,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1290 conditions, 341 events. 183/341 cut-off events. For 1715/1715 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1182 event pairs, 48 based on Foata normal form. 1/340 useless extension candidates. Maximal degree in co-relation 1266. Up to 295 conditions per place. [2024-06-27 20:19:16,865 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 41 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2024-06-27 20:19:16,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 55 transitions, 354 flow [2024-06-27 20:19:16,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:16,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-06-27 20:19:16,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147465437788018 [2024-06-27 20:19:16,866 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 210 flow. Second operand 7 states and 90 transitions. [2024-06-27 20:19:16,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 55 transitions, 354 flow [2024-06-27 20:19:16,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 55 transitions, 331 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:16,868 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 226 flow [2024-06-27 20:19:16,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=226, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2024-06-27 20:19:16,869 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2024-06-27 20:19:16,869 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 226 flow [2024-06-27 20:19:16,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-27 20:19:16,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:16,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:16,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:19:16,870 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:16,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:16,870 INFO L85 PathProgramCache]: Analyzing trace with hash -229725094, now seen corresponding path program 1 times [2024-06-27 20:19:16,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:16,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198870010] [2024-06-27 20:19:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:16,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:17,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:17,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198870010] [2024-06-27 20:19:17,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198870010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:17,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:17,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:17,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475564500] [2024-06-27 20:19:17,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:17,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:17,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:17,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:17,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:17,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:17,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 226 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:17,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:17,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:17,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:17,538 INFO L124 PetriNetUnfolderBase]: 200/360 cut-off events. [2024-06-27 20:19:17,539 INFO L125 PetriNetUnfolderBase]: For 1990/1990 co-relation queries the response was YES. [2024-06-27 20:19:17,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1415 conditions, 360 events. 200/360 cut-off events. For 1990/1990 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1211 event pairs, 51 based on Foata normal form. 1/359 useless extension candidates. Maximal degree in co-relation 1390. Up to 322 conditions per place. [2024-06-27 20:19:17,541 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 40 selfloop transitions, 15 changer transitions 0/57 dead transitions. [2024-06-27 20:19:17,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 57 transitions, 398 flow [2024-06-27 20:19:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:17,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-06-27 20:19:17,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39631336405529954 [2024-06-27 20:19:17,542 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 226 flow. Second operand 7 states and 86 transitions. [2024-06-27 20:19:17,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 57 transitions, 398 flow [2024-06-27 20:19:17,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 57 transitions, 375 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:17,545 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 258 flow [2024-06-27 20:19:17,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=258, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2024-06-27 20:19:17,545 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2024-06-27 20:19:17,545 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 258 flow [2024-06-27 20:19:17,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:17,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:17,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:17,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:19:17,546 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:17,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:17,546 INFO L85 PathProgramCache]: Analyzing trace with hash -400427710, now seen corresponding path program 2 times [2024-06-27 20:19:17,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:17,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259027924] [2024-06-27 20:19:17,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:17,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:18,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:18,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259027924] [2024-06-27 20:19:18,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259027924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:18,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:18,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:18,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852449746] [2024-06-27 20:19:18,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:18,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:18,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:18,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:18,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:18,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-27 20:19:18,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 258 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-27 20:19:18,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:18,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-27 20:19:18,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:18,261 INFO L124 PetriNetUnfolderBase]: 191/353 cut-off events. [2024-06-27 20:19:18,261 INFO L125 PetriNetUnfolderBase]: For 2474/2474 co-relation queries the response was YES. [2024-06-27 20:19:18,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 353 events. 191/353 cut-off events. For 2474/2474 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1218 event pairs, 48 based on Foata normal form. 1/352 useless extension candidates. Maximal degree in co-relation 1433. Up to 289 conditions per place. [2024-06-27 20:19:18,263 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 38 selfloop transitions, 17 changer transitions 0/61 dead transitions. [2024-06-27 20:19:18,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 444 flow [2024-06-27 20:19:18,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-27 20:19:18,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423963133640553 [2024-06-27 20:19:18,265 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 258 flow. Second operand 7 states and 92 transitions. [2024-06-27 20:19:18,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 444 flow [2024-06-27 20:19:18,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 61 transitions, 430 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 20:19:18,268 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 315 flow [2024-06-27 20:19:18,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=315, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2024-06-27 20:19:18,270 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 30 predicate places. [2024-06-27 20:19:18,270 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 315 flow [2024-06-27 20:19:18,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-27 20:19:18,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:18,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:18,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:19:18,271 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:18,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:18,271 INFO L85 PathProgramCache]: Analyzing trace with hash -283233296, now seen corresponding path program 2 times [2024-06-27 20:19:18,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:18,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991632665] [2024-06-27 20:19:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:18,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:18,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:18,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991632665] [2024-06-27 20:19:18,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991632665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:18,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:18,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:18,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150333351] [2024-06-27 20:19:18,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:18,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:18,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:18,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:18,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:18,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:18,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 315 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:18,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:18,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:18,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:18,997 INFO L124 PetriNetUnfolderBase]: 206/370 cut-off events. [2024-06-27 20:19:18,997 INFO L125 PetriNetUnfolderBase]: For 2936/2936 co-relation queries the response was YES. [2024-06-27 20:19:18,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1627 conditions, 370 events. 206/370 cut-off events. For 2936/2936 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1263 event pairs, 49 based on Foata normal form. 1/369 useless extension candidates. Maximal degree in co-relation 1599. Up to 353 conditions per place. [2024-06-27 20:19:18,999 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 47 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2024-06-27 20:19:18,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 59 transitions, 457 flow [2024-06-27 20:19:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-27 20:19:19,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-27 20:19:19,000 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 315 flow. Second operand 7 states and 78 transitions. [2024-06-27 20:19:19,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 59 transitions, 457 flow [2024-06-27 20:19:19,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 59 transitions, 435 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 20:19:19,006 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 334 flow [2024-06-27 20:19:19,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=334, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2024-06-27 20:19:19,007 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2024-06-27 20:19:19,007 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 334 flow [2024-06-27 20:19:19,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:19,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:19,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:19,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:19:19,008 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:19,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:19,008 INFO L85 PathProgramCache]: Analyzing trace with hash -223296190, now seen corresponding path program 3 times [2024-06-27 20:19:19,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:19,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488325138] [2024-06-27 20:19:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:19,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:19,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:19,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488325138] [2024-06-27 20:19:19,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488325138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:19,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:19,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:19,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457814798] [2024-06-27 20:19:19,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:19,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:19,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:19,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:19,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:19,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-27 20:19:19,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 334 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-27 20:19:19,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:19,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-27 20:19:19,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:19,702 INFO L124 PetriNetUnfolderBase]: 192/355 cut-off events. [2024-06-27 20:19:19,703 INFO L125 PetriNetUnfolderBase]: For 3370/3370 co-relation queries the response was YES. [2024-06-27 20:19:19,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1601 conditions, 355 events. 192/355 cut-off events. For 3370/3370 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1234 event pairs, 47 based on Foata normal form. 1/354 useless extension candidates. Maximal degree in co-relation 1571. Up to 317 conditions per place. [2024-06-27 20:19:19,705 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 42 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2024-06-27 20:19:19,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 454 flow [2024-06-27 20:19:19,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-27 20:19:19,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-27 20:19:19,706 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 334 flow. Second operand 7 states and 84 transitions. [2024-06-27 20:19:19,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 454 flow [2024-06-27 20:19:19,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 59 transitions, 427 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:19,709 INFO L231 Difference]: Finished difference. Result has 66 places, 52 transitions, 332 flow [2024-06-27 20:19:19,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=332, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2024-06-27 20:19:19,710 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2024-06-27 20:19:19,710 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 332 flow [2024-06-27 20:19:19,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-27 20:19:19,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:19,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:19,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:19:19,710 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:19,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:19,711 INFO L85 PathProgramCache]: Analyzing trace with hash -395785894, now seen corresponding path program 3 times [2024-06-27 20:19:19,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:19,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135123846] [2024-06-27 20:19:19,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:19,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:20,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:20,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135123846] [2024-06-27 20:19:20,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135123846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:20,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:20,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:20,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080358331] [2024-06-27 20:19:20,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:20,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:20,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:20,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:20,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:20,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:20,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 332 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:20,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:20,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:20,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:20,377 INFO L124 PetriNetUnfolderBase]: 202/364 cut-off events. [2024-06-27 20:19:20,377 INFO L125 PetriNetUnfolderBase]: For 3685/3685 co-relation queries the response was YES. [2024-06-27 20:19:20,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1660 conditions, 364 events. 202/364 cut-off events. For 3685/3685 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1233 event pairs, 49 based on Foata normal form. 1/363 useless extension candidates. Maximal degree in co-relation 1629. Up to 341 conditions per place. [2024-06-27 20:19:20,379 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 44 selfloop transitions, 13 changer transitions 0/59 dead transitions. [2024-06-27 20:19:20,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 59 transitions, 462 flow [2024-06-27 20:19:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-27 20:19:20,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-27 20:19:20,381 INFO L175 Difference]: Start difference. First operand has 66 places, 52 transitions, 332 flow. Second operand 7 states and 80 transitions. [2024-06-27 20:19:20,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 59 transitions, 462 flow [2024-06-27 20:19:20,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 59 transitions, 431 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:20,384 INFO L231 Difference]: Finished difference. Result has 67 places, 52 transitions, 332 flow [2024-06-27 20:19:20,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=332, PETRI_PLACES=67, PETRI_TRANSITIONS=52} [2024-06-27 20:19:20,385 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-06-27 20:19:20,385 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 52 transitions, 332 flow [2024-06-27 20:19:20,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:20,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:20,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:20,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:19:20,386 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:20,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:20,386 INFO L85 PathProgramCache]: Analyzing trace with hash 467834253, now seen corresponding path program 1 times [2024-06-27 20:19:20,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:20,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020769425] [2024-06-27 20:19:20,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:20,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:21,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:21,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020769425] [2024-06-27 20:19:21,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020769425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:21,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:21,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:21,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014774555] [2024-06-27 20:19:21,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:21,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:21,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:21,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:21,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:21,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-27 20:19:21,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 52 transitions, 332 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-27 20:19:21,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:21,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-27 20:19:21,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:21,345 INFO L124 PetriNetUnfolderBase]: 198/365 cut-off events. [2024-06-27 20:19:21,345 INFO L125 PetriNetUnfolderBase]: For 4372/4372 co-relation queries the response was YES. [2024-06-27 20:19:21,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1708 conditions, 365 events. 198/365 cut-off events. For 4372/4372 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1265 event pairs, 46 based on Foata normal form. 1/364 useless extension candidates. Maximal degree in co-relation 1676. Up to 300 conditions per place. [2024-06-27 20:19:21,347 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 52 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-27 20:19:21,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 75 transitions, 572 flow [2024-06-27 20:19:21,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-27 20:19:21,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-27 20:19:21,349 INFO L175 Difference]: Start difference. First operand has 67 places, 52 transitions, 332 flow. Second operand 9 states and 115 transitions. [2024-06-27 20:19:21,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 75 transitions, 572 flow [2024-06-27 20:19:21,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 75 transitions, 533 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:21,352 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 362 flow [2024-06-27 20:19:21,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=362, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2024-06-27 20:19:21,353 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 40 predicate places. [2024-06-27 20:19:21,353 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 362 flow [2024-06-27 20:19:21,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-27 20:19:21,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:21,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:21,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:19:21,354 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:21,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:21,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1218325528, now seen corresponding path program 1 times [2024-06-27 20:19:21,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:21,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090482891] [2024-06-27 20:19:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:21,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:21,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:21,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090482891] [2024-06-27 20:19:21,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090482891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:21,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:21,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:21,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354442647] [2024-06-27 20:19:21,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:21,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:21,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:21,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:21,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:21,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:21,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 362 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:21,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:21,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:21,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:22,197 INFO L124 PetriNetUnfolderBase]: 213/382 cut-off events. [2024-06-27 20:19:22,197 INFO L125 PetriNetUnfolderBase]: For 4908/4908 co-relation queries the response was YES. [2024-06-27 20:19:22,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1854 conditions, 382 events. 213/382 cut-off events. For 4908/4908 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1319 event pairs, 47 based on Foata normal form. 1/381 useless extension candidates. Maximal degree in co-relation 1821. Up to 350 conditions per place. [2024-06-27 20:19:22,199 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 58 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-27 20:19:22,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 72 transitions, 550 flow [2024-06-27 20:19:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:22,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-27 20:19:22,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:19:22,200 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 362 flow. Second operand 8 states and 93 transitions. [2024-06-27 20:19:22,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 72 transitions, 550 flow [2024-06-27 20:19:22,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 72 transitions, 522 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:22,204 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 381 flow [2024-06-27 20:19:22,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=381, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-06-27 20:19:22,205 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2024-06-27 20:19:22,205 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 381 flow [2024-06-27 20:19:22,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:22,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:22,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:22,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:19:22,206 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:22,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:22,206 INFO L85 PathProgramCache]: Analyzing trace with hash 471499383, now seen corresponding path program 2 times [2024-06-27 20:19:22,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:22,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426437200] [2024-06-27 20:19:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:22,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:23,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:23,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426437200] [2024-06-27 20:19:23,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426437200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:23,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:23,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:23,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272608880] [2024-06-27 20:19:23,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:23,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:23,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:23,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:23,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:23,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-27 20:19:23,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 381 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-27 20:19:23,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:23,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-27 20:19:23,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:23,283 INFO L124 PetriNetUnfolderBase]: 201/369 cut-off events. [2024-06-27 20:19:23,283 INFO L125 PetriNetUnfolderBase]: For 5455/5455 co-relation queries the response was YES. [2024-06-27 20:19:23,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 369 events. 201/369 cut-off events. For 5455/5455 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1290 event pairs, 45 based on Foata normal form. 1/368 useless extension candidates. Maximal degree in co-relation 1817. Up to 315 conditions per place. [2024-06-27 20:19:23,285 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 52 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-27 20:19:23,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 72 transitions, 543 flow [2024-06-27 20:19:23,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-27 20:19:23,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-27 20:19:23,286 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 381 flow. Second operand 8 states and 100 transitions. [2024-06-27 20:19:23,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 72 transitions, 543 flow [2024-06-27 20:19:23,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 508 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:23,291 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 375 flow [2024-06-27 20:19:23,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=375, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2024-06-27 20:19:23,292 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2024-06-27 20:19:23,292 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 375 flow [2024-06-27 20:19:23,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-27 20:19:23,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:23,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:23,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:19:23,293 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:23,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash -303115794, now seen corresponding path program 2 times [2024-06-27 20:19:23,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:23,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238825673] [2024-06-27 20:19:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:23,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:23,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:23,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238825673] [2024-06-27 20:19:23,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238825673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:23,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:23,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:23,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51363387] [2024-06-27 20:19:23,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:23,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:23,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:23,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:23,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:23,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:23,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 375 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:23,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:23,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:23,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:24,026 INFO L124 PetriNetUnfolderBase]: 219/392 cut-off events. [2024-06-27 20:19:24,027 INFO L125 PetriNetUnfolderBase]: For 6180/6180 co-relation queries the response was YES. [2024-06-27 20:19:24,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2004 conditions, 392 events. 219/392 cut-off events. For 6180/6180 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1358 event pairs, 49 based on Foata normal form. 1/391 useless extension candidates. Maximal degree in co-relation 1968. Up to 318 conditions per place. [2024-06-27 20:19:24,030 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 48 selfloop transitions, 27 changer transitions 0/77 dead transitions. [2024-06-27 20:19:24,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 77 transitions, 681 flow [2024-06-27 20:19:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:24,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:24,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-27 20:19:24,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39919354838709675 [2024-06-27 20:19:24,031 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 375 flow. Second operand 8 states and 99 transitions. [2024-06-27 20:19:24,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 77 transitions, 681 flow [2024-06-27 20:19:24,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 77 transitions, 652 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:24,038 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 463 flow [2024-06-27 20:19:24,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=463, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2024-06-27 20:19:24,038 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2024-06-27 20:19:24,039 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 463 flow [2024-06-27 20:19:24,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:24,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:24,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:24,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:19:24,039 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:24,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:24,040 INFO L85 PathProgramCache]: Analyzing trace with hash -303115577, now seen corresponding path program 1 times [2024-06-27 20:19:24,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:24,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159156925] [2024-06-27 20:19:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:24,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:24,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:24,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159156925] [2024-06-27 20:19:24,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159156925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:24,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:24,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:24,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458826624] [2024-06-27 20:19:24,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:24,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:24,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:24,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:24,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:24,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:24,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 463 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:24,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:24,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:24,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:24,789 INFO L124 PetriNetUnfolderBase]: 238/423 cut-off events. [2024-06-27 20:19:24,790 INFO L125 PetriNetUnfolderBase]: For 7728/7728 co-relation queries the response was YES. [2024-06-27 20:19:24,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2221 conditions, 423 events. 238/423 cut-off events. For 7728/7728 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1502 event pairs, 52 based on Foata normal form. 3/424 useless extension candidates. Maximal degree in co-relation 2184. Up to 355 conditions per place. [2024-06-27 20:19:24,792 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 64 selfloop transitions, 20 changer transitions 0/86 dead transitions. [2024-06-27 20:19:24,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 731 flow [2024-06-27 20:19:24,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-27 20:19:24,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-06-27 20:19:24,794 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 463 flow. Second operand 8 states and 101 transitions. [2024-06-27 20:19:24,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 731 flow [2024-06-27 20:19:24,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 86 transitions, 701 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 20:19:24,801 INFO L231 Difference]: Finished difference. Result has 82 places, 70 transitions, 518 flow [2024-06-27 20:19:24,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=518, PETRI_PLACES=82, PETRI_TRANSITIONS=70} [2024-06-27 20:19:24,801 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-27 20:19:24,801 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 70 transitions, 518 flow [2024-06-27 20:19:24,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:24,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:24,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:24,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:19:24,802 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:24,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:24,802 INFO L85 PathProgramCache]: Analyzing trace with hash 471643533, now seen corresponding path program 3 times [2024-06-27 20:19:24,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:24,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942602782] [2024-06-27 20:19:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:24,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:25,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:25,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942602782] [2024-06-27 20:19:25,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942602782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:25,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:25,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:25,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703425827] [2024-06-27 20:19:25,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:25,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:25,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:25,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:25,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:25,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-27 20:19:25,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 70 transitions, 518 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-27 20:19:25,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:25,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-27 20:19:25,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:25,765 INFO L124 PetriNetUnfolderBase]: 231/418 cut-off events. [2024-06-27 20:19:25,765 INFO L125 PetriNetUnfolderBase]: For 8254/8254 co-relation queries the response was YES. [2024-06-27 20:19:25,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2336 conditions, 418 events. 231/418 cut-off events. For 8254/8254 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1504 event pairs, 48 based on Foata normal form. 1/417 useless extension candidates. Maximal degree in co-relation 2296. Up to 344 conditions per place. [2024-06-27 20:19:25,768 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 53 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-27 20:19:25,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 83 transitions, 706 flow [2024-06-27 20:19:25,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-27 20:19:25,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-06-27 20:19:25,769 INFO L175 Difference]: Start difference. First operand has 82 places, 70 transitions, 518 flow. Second operand 8 states and 101 transitions. [2024-06-27 20:19:25,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 83 transitions, 706 flow [2024-06-27 20:19:25,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 692 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 20:19:25,778 INFO L231 Difference]: Finished difference. Result has 87 places, 72 transitions, 569 flow [2024-06-27 20:19:25,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=569, PETRI_PLACES=87, PETRI_TRANSITIONS=72} [2024-06-27 20:19:25,779 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-27 20:19:25,779 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 72 transitions, 569 flow [2024-06-27 20:19:25,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-27 20:19:25,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:25,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:25,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:19:25,779 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:25,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:25,780 INFO L85 PathProgramCache]: Analyzing trace with hash -303121374, now seen corresponding path program 3 times [2024-06-27 20:19:25,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:25,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740634993] [2024-06-27 20:19:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:25,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:26,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:26,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740634993] [2024-06-27 20:19:26,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740634993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:26,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:26,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:26,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764431329] [2024-06-27 20:19:26,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:26,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:26,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:26,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:26,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:26,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:26,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 72 transitions, 569 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:26,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:26,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:26,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:26,600 INFO L124 PetriNetUnfolderBase]: 239/425 cut-off events. [2024-06-27 20:19:26,600 INFO L125 PetriNetUnfolderBase]: For 8795/8795 co-relation queries the response was YES. [2024-06-27 20:19:26,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2448 conditions, 425 events. 239/425 cut-off events. For 8795/8795 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1507 event pairs, 51 based on Foata normal form. 1/424 useless extension candidates. Maximal degree in co-relation 2405. Up to 352 conditions per place. [2024-06-27 20:19:26,603 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 56 selfloop transitions, 26 changer transitions 0/84 dead transitions. [2024-06-27 20:19:26,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 84 transitions, 803 flow [2024-06-27 20:19:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:26,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:26,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-27 20:19:26,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39919354838709675 [2024-06-27 20:19:26,604 INFO L175 Difference]: Start difference. First operand has 87 places, 72 transitions, 569 flow. Second operand 8 states and 99 transitions. [2024-06-27 20:19:26,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 84 transitions, 803 flow [2024-06-27 20:19:26,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 748 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:26,612 INFO L231 Difference]: Finished difference. Result has 89 places, 72 transitions, 571 flow [2024-06-27 20:19:26,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=571, PETRI_PLACES=89, PETRI_TRANSITIONS=72} [2024-06-27 20:19:26,613 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-06-27 20:19:26,613 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 72 transitions, 571 flow [2024-06-27 20:19:26,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:26,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:26,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:26,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:19:26,614 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:26,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:26,614 INFO L85 PathProgramCache]: Analyzing trace with hash 705899183, now seen corresponding path program 2 times [2024-06-27 20:19:26,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:26,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612151060] [2024-06-27 20:19:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:26,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:27,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:27,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612151060] [2024-06-27 20:19:27,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612151060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:27,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:27,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:27,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066795635] [2024-06-27 20:19:27,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:27,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:27,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:27,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:27,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:27,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:27,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 72 transitions, 571 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:27,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:27,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:27,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:27,449 INFO L124 PetriNetUnfolderBase]: 248/440 cut-off events. [2024-06-27 20:19:27,449 INFO L125 PetriNetUnfolderBase]: For 10115/10115 co-relation queries the response was YES. [2024-06-27 20:19:27,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2541 conditions, 440 events. 248/440 cut-off events. For 10115/10115 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1585 event pairs, 49 based on Foata normal form. 3/441 useless extension candidates. Maximal degree in co-relation 2497. Up to 414 conditions per place. [2024-06-27 20:19:27,453 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 70 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2024-06-27 20:19:27,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 84 transitions, 773 flow [2024-06-27 20:19:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:27,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-27 20:19:27,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-27 20:19:27,455 INFO L175 Difference]: Start difference. First operand has 89 places, 72 transitions, 571 flow. Second operand 8 states and 89 transitions. [2024-06-27 20:19:27,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 84 transitions, 773 flow [2024-06-27 20:19:27,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 84 transitions, 709 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:27,467 INFO L231 Difference]: Finished difference. Result has 90 places, 74 transitions, 554 flow [2024-06-27 20:19:27,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=554, PETRI_PLACES=90, PETRI_TRANSITIONS=74} [2024-06-27 20:19:27,468 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2024-06-27 20:19:27,468 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 554 flow [2024-06-27 20:19:27,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:27,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:27,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:27,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:19:27,469 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:27,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:27,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1675110742, now seen corresponding path program 4 times [2024-06-27 20:19:27,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:27,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018091604] [2024-06-27 20:19:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:27,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:28,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:28,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018091604] [2024-06-27 20:19:28,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018091604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:28,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:28,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:28,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411092586] [2024-06-27 20:19:28,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:28,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:28,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:28,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:28,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:28,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:28,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 74 transitions, 554 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:28,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:28,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:28,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:28,256 INFO L124 PetriNetUnfolderBase]: 251/445 cut-off events. [2024-06-27 20:19:28,257 INFO L125 PetriNetUnfolderBase]: For 10451/10451 co-relation queries the response was YES. [2024-06-27 20:19:28,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2587 conditions, 445 events. 251/445 cut-off events. For 10451/10451 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1598 event pairs, 49 based on Foata normal form. 1/444 useless extension candidates. Maximal degree in co-relation 2542. Up to 425 conditions per place. [2024-06-27 20:19:28,260 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 70 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2024-06-27 20:19:28,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 84 transitions, 758 flow [2024-06-27 20:19:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-27 20:19:28,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-27 20:19:28,261 INFO L175 Difference]: Start difference. First operand has 90 places, 74 transitions, 554 flow. Second operand 8 states and 87 transitions. [2024-06-27 20:19:28,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 84 transitions, 758 flow [2024-06-27 20:19:28,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 84 transitions, 728 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:28,269 INFO L231 Difference]: Finished difference. Result has 92 places, 76 transitions, 579 flow [2024-06-27 20:19:28,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=579, PETRI_PLACES=92, PETRI_TRANSITIONS=76} [2024-06-27 20:19:28,270 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2024-06-27 20:19:28,270 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 76 transitions, 579 flow [2024-06-27 20:19:28,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:28,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:28,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:28,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:19:28,270 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:28,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:28,270 INFO L85 PathProgramCache]: Analyzing trace with hash 701848499, now seen corresponding path program 3 times [2024-06-27 20:19:28,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:28,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278715416] [2024-06-27 20:19:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:28,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:28,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:28,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278715416] [2024-06-27 20:19:28,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278715416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:28,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:28,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:28,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821724894] [2024-06-27 20:19:28,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:28,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:28,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:28,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:28,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:28,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:28,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 76 transitions, 579 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:28,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:28,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:28,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:29,057 INFO L124 PetriNetUnfolderBase]: 260/460 cut-off events. [2024-06-27 20:19:29,057 INFO L125 PetriNetUnfolderBase]: For 11928/11928 co-relation queries the response was YES. [2024-06-27 20:19:29,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2681 conditions, 460 events. 260/460 cut-off events. For 11928/11928 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1664 event pairs, 49 based on Foata normal form. 3/461 useless extension candidates. Maximal degree in co-relation 2636. Up to 402 conditions per place. [2024-06-27 20:19:29,060 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 70 selfloop transitions, 19 changer transitions 0/91 dead transitions. [2024-06-27 20:19:29,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 91 transitions, 855 flow [2024-06-27 20:19:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:29,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:29,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-27 20:19:29,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-27 20:19:29,062 INFO L175 Difference]: Start difference. First operand has 92 places, 76 transitions, 579 flow. Second operand 8 states and 96 transitions. [2024-06-27 20:19:29,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 91 transitions, 855 flow [2024-06-27 20:19:29,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 91 transitions, 820 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:29,071 INFO L231 Difference]: Finished difference. Result has 94 places, 78 transitions, 605 flow [2024-06-27 20:19:29,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=605, PETRI_PLACES=94, PETRI_TRANSITIONS=78} [2024-06-27 20:19:29,071 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-06-27 20:19:29,071 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 78 transitions, 605 flow [2024-06-27 20:19:29,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:29,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:29,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:29,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:19:29,073 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:29,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:29,073 INFO L85 PathProgramCache]: Analyzing trace with hash 701848282, now seen corresponding path program 5 times [2024-06-27 20:19:29,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:29,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533530558] [2024-06-27 20:19:29,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:29,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:29,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:29,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533530558] [2024-06-27 20:19:29,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533530558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:29,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:29,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:29,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250064092] [2024-06-27 20:19:29,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:29,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:29,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:29,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:29,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:29,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:29,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 78 transitions, 605 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:29,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:29,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:29,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:29,792 INFO L124 PetriNetUnfolderBase]: 263/465 cut-off events. [2024-06-27 20:19:29,792 INFO L125 PetriNetUnfolderBase]: For 12340/12340 co-relation queries the response was YES. [2024-06-27 20:19:29,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2776 conditions, 465 events. 263/465 cut-off events. For 12340/12340 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1697 event pairs, 49 based on Foata normal form. 1/464 useless extension candidates. Maximal degree in co-relation 2730. Up to 429 conditions per place. [2024-06-27 20:19:29,797 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 68 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-27 20:19:29,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 89 transitions, 875 flow [2024-06-27 20:19:29,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:29,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-27 20:19:29,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-27 20:19:29,798 INFO L175 Difference]: Start difference. First operand has 94 places, 78 transitions, 605 flow. Second operand 8 states and 92 transitions. [2024-06-27 20:19:29,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 89 transitions, 875 flow [2024-06-27 20:19:29,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 89 transitions, 825 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:29,811 INFO L231 Difference]: Finished difference. Result has 96 places, 80 transitions, 624 flow [2024-06-27 20:19:29,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=624, PETRI_PLACES=96, PETRI_TRANSITIONS=80} [2024-06-27 20:19:29,811 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2024-06-27 20:19:29,811 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 80 transitions, 624 flow [2024-06-27 20:19:29,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:29,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:29,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:29,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:19:29,812 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:29,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:29,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1667961119, now seen corresponding path program 4 times [2024-06-27 20:19:29,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:29,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75098586] [2024-06-27 20:19:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:29,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:30,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:30,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75098586] [2024-06-27 20:19:30,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75098586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:30,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:30,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:30,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911453208] [2024-06-27 20:19:30,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:30,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:30,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:30,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:30,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:30,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:30,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 80 transitions, 624 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:30,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:30,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:30,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:30,577 INFO L124 PetriNetUnfolderBase]: 257/456 cut-off events. [2024-06-27 20:19:30,577 INFO L125 PetriNetUnfolderBase]: For 12800/12800 co-relation queries the response was YES. [2024-06-27 20:19:30,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2666 conditions, 456 events. 257/456 cut-off events. For 12800/12800 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1651 event pairs, 47 based on Foata normal form. 3/457 useless extension candidates. Maximal degree in co-relation 2619. Up to 418 conditions per place. [2024-06-27 20:19:30,580 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 75 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-06-27 20:19:30,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 92 transitions, 834 flow [2024-06-27 20:19:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-27 20:19:30,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:19:30,580 INFO L175 Difference]: Start difference. First operand has 96 places, 80 transitions, 624 flow. Second operand 8 states and 93 transitions. [2024-06-27 20:19:30,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 92 transitions, 834 flow [2024-06-27 20:19:30,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 92 transitions, 768 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:30,593 INFO L231 Difference]: Finished difference. Result has 98 places, 80 transitions, 593 flow [2024-06-27 20:19:30,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=593, PETRI_PLACES=98, PETRI_TRANSITIONS=80} [2024-06-27 20:19:30,593 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2024-06-27 20:19:30,593 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 80 transitions, 593 flow [2024-06-27 20:19:30,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:30,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:30,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:30,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:19:30,594 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:30,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:30,594 INFO L85 PathProgramCache]: Analyzing trace with hash -159230844, now seen corresponding path program 6 times [2024-06-27 20:19:30,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:30,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761298668] [2024-06-27 20:19:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:30,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:31,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:31,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761298668] [2024-06-27 20:19:31,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761298668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:31,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:31,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:31,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512352992] [2024-06-27 20:19:31,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:31,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:31,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:31,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:31,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:31,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:31,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 80 transitions, 593 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:31,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:31,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:31,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:31,305 INFO L124 PetriNetUnfolderBase]: 255/453 cut-off events. [2024-06-27 20:19:31,306 INFO L125 PetriNetUnfolderBase]: For 12572/12572 co-relation queries the response was YES. [2024-06-27 20:19:31,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2637 conditions, 453 events. 255/453 cut-off events. For 12572/12572 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1643 event pairs, 47 based on Foata normal form. 1/452 useless extension candidates. Maximal degree in co-relation 2589. Up to 418 conditions per place. [2024-06-27 20:19:31,313 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 66 selfloop transitions, 20 changer transitions 0/88 dead transitions. [2024-06-27 20:19:31,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 88 transitions, 783 flow [2024-06-27 20:19:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-27 20:19:31,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-27 20:19:31,317 INFO L175 Difference]: Start difference. First operand has 98 places, 80 transitions, 593 flow. Second operand 8 states and 90 transitions. [2024-06-27 20:19:31,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 88 transitions, 783 flow [2024-06-27 20:19:31,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 88 transitions, 724 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:31,326 INFO L231 Difference]: Finished difference. Result has 99 places, 80 transitions, 579 flow [2024-06-27 20:19:31,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=579, PETRI_PLACES=99, PETRI_TRANSITIONS=80} [2024-06-27 20:19:31,331 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2024-06-27 20:19:31,331 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 80 transitions, 579 flow [2024-06-27 20:19:31,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:31,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:31,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:31,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:19:31,331 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:31,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:31,332 INFO L85 PathProgramCache]: Analyzing trace with hash -159230999, now seen corresponding path program 4 times [2024-06-27 20:19:31,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:31,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072014955] [2024-06-27 20:19:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:31,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:31,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:31,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072014955] [2024-06-27 20:19:31,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072014955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:31,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:31,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:31,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566009650] [2024-06-27 20:19:31,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:31,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:31,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:31,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:31,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:32,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-27 20:19:32,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 80 transitions, 579 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-27 20:19:32,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:32,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-27 20:19:32,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:32,201 INFO L124 PetriNetUnfolderBase]: 241/438 cut-off events. [2024-06-27 20:19:32,201 INFO L125 PetriNetUnfolderBase]: For 13083/13083 co-relation queries the response was YES. [2024-06-27 20:19:32,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2536 conditions, 438 events. 241/438 cut-off events. For 13083/13083 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1621 event pairs, 45 based on Foata normal form. 1/437 useless extension candidates. Maximal degree in co-relation 2487. Up to 389 conditions per place. [2024-06-27 20:19:32,206 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 65 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2024-06-27 20:19:32,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 90 transitions, 773 flow [2024-06-27 20:19:32,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:32,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:32,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-27 20:19:32,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-27 20:19:32,207 INFO L175 Difference]: Start difference. First operand has 99 places, 80 transitions, 579 flow. Second operand 8 states and 94 transitions. [2024-06-27 20:19:32,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 90 transitions, 773 flow [2024-06-27 20:19:32,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 90 transitions, 728 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:32,218 INFO L231 Difference]: Finished difference. Result has 100 places, 82 transitions, 589 flow [2024-06-27 20:19:32,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=589, PETRI_PLACES=100, PETRI_TRANSITIONS=82} [2024-06-27 20:19:32,220 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 70 predicate places. [2024-06-27 20:19:32,220 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 82 transitions, 589 flow [2024-06-27 20:19:32,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-27 20:19:32,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:32,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:32,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:19:32,220 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:32,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:32,221 INFO L85 PathProgramCache]: Analyzing trace with hash -924980251, now seen corresponding path program 1 times [2024-06-27 20:19:32,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:32,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303522489] [2024-06-27 20:19:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:32,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:32,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:32,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303522489] [2024-06-27 20:19:32,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303522489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:32,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:32,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:32,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715747456] [2024-06-27 20:19:32,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:32,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:32,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:32,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:32,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:33,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-27 20:19:33,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 82 transitions, 589 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:33,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:33,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-27 20:19:33,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:33,318 INFO L124 PetriNetUnfolderBase]: 252/459 cut-off events. [2024-06-27 20:19:33,318 INFO L125 PetriNetUnfolderBase]: For 15481/15481 co-relation queries the response was YES. [2024-06-27 20:19:33,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2744 conditions, 459 events. 252/459 cut-off events. For 15481/15481 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1750 event pairs, 26 based on Foata normal form. 2/459 useless extension candidates. Maximal degree in co-relation 2694. Up to 349 conditions per place. [2024-06-27 20:19:33,321 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 75 selfloop transitions, 18 changer transitions 0/106 dead transitions. [2024-06-27 20:19:33,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 106 transitions, 917 flow [2024-06-27 20:19:33,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:33,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-27 20:19:33,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-27 20:19:33,322 INFO L175 Difference]: Start difference. First operand has 100 places, 82 transitions, 589 flow. Second operand 10 states and 125 transitions. [2024-06-27 20:19:33,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 106 transitions, 917 flow [2024-06-27 20:19:33,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 106 transitions, 878 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:33,334 INFO L231 Difference]: Finished difference. Result has 104 places, 84 transitions, 624 flow [2024-06-27 20:19:33,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=624, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2024-06-27 20:19:33,334 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2024-06-27 20:19:33,334 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 624 flow [2024-06-27 20:19:33,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:33,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:33,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:33,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:19:33,335 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:33,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:33,335 INFO L85 PathProgramCache]: Analyzing trace with hash -924919801, now seen corresponding path program 2 times [2024-06-27 20:19:33,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:33,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235112924] [2024-06-27 20:19:33,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:33,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:34,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:34,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235112924] [2024-06-27 20:19:34,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235112924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:34,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:34,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:34,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547761880] [2024-06-27 20:19:34,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:34,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:34,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:34,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:34,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:34,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-27 20:19:34,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 624 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:34,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:34,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-27 20:19:34,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:34,475 INFO L124 PetriNetUnfolderBase]: 249/454 cut-off events. [2024-06-27 20:19:34,475 INFO L125 PetriNetUnfolderBase]: For 15606/15606 co-relation queries the response was YES. [2024-06-27 20:19:34,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2715 conditions, 454 events. 249/454 cut-off events. For 15606/15606 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1734 event pairs, 43 based on Foata normal form. 2/454 useless extension candidates. Maximal degree in co-relation 2664. Up to 373 conditions per place. [2024-06-27 20:19:34,478 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 74 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2024-06-27 20:19:34,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 104 transitions, 854 flow [2024-06-27 20:19:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-27 20:19:34,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-27 20:19:34,480 INFO L175 Difference]: Start difference. First operand has 104 places, 84 transitions, 624 flow. Second operand 10 states and 123 transitions. [2024-06-27 20:19:34,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 104 transitions, 854 flow [2024-06-27 20:19:34,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 104 transitions, 805 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:34,492 INFO L231 Difference]: Finished difference. Result has 108 places, 84 transitions, 614 flow [2024-06-27 20:19:34,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=614, PETRI_PLACES=108, PETRI_TRANSITIONS=84} [2024-06-27 20:19:34,493 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 78 predicate places. [2024-06-27 20:19:34,493 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 84 transitions, 614 flow [2024-06-27 20:19:34,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:34,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:34,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:34,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:19:34,493 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:34,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:34,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1617960765, now seen corresponding path program 1 times [2024-06-27 20:19:34,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:34,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336564537] [2024-06-27 20:19:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:34,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:35,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:35,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336564537] [2024-06-27 20:19:35,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336564537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:35,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:35,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:35,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692849442] [2024-06-27 20:19:35,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:35,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:35,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:35,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:35,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:35,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:35,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 84 transitions, 614 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:35,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:35,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:35,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:35,699 INFO L124 PetriNetUnfolderBase]: 264/471 cut-off events. [2024-06-27 20:19:35,700 INFO L125 PetriNetUnfolderBase]: For 16037/16037 co-relation queries the response was YES. [2024-06-27 20:19:35,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2808 conditions, 471 events. 264/471 cut-off events. For 16037/16037 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1758 event pairs, 44 based on Foata normal form. 1/470 useless extension candidates. Maximal degree in co-relation 2755. Up to 417 conditions per place. [2024-06-27 20:19:35,702 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 84 selfloop transitions, 20 changer transitions 0/106 dead transitions. [2024-06-27 20:19:35,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 106 transitions, 890 flow [2024-06-27 20:19:35,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:19:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:19:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-27 20:19:35,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-27 20:19:35,703 INFO L175 Difference]: Start difference. First operand has 108 places, 84 transitions, 614 flow. Second operand 11 states and 123 transitions. [2024-06-27 20:19:35,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 106 transitions, 890 flow [2024-06-27 20:19:35,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 106 transitions, 854 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 20:19:35,717 INFO L231 Difference]: Finished difference. Result has 110 places, 86 transitions, 649 flow [2024-06-27 20:19:35,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=649, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2024-06-27 20:19:35,718 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2024-06-27 20:19:35,718 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 649 flow [2024-06-27 20:19:35,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:35,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:35,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:35,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:19:35,718 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:35,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:35,718 INFO L85 PathProgramCache]: Analyzing trace with hash -922118331, now seen corresponding path program 1 times [2024-06-27 20:19:35,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:35,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505684989] [2024-06-27 20:19:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:35,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:36,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:36,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505684989] [2024-06-27 20:19:36,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505684989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:36,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:36,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:36,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488198724] [2024-06-27 20:19:36,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:36,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:36,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:36,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:36,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 649 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:36,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:36,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:36,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:36,560 INFO L124 PetriNetUnfolderBase]: 273/486 cut-off events. [2024-06-27 20:19:36,560 INFO L125 PetriNetUnfolderBase]: For 18142/18142 co-relation queries the response was YES. [2024-06-27 20:19:36,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2936 conditions, 486 events. 273/486 cut-off events. For 18142/18142 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1826 event pairs, 43 based on Foata normal form. 3/487 useless extension candidates. Maximal degree in co-relation 2882. Up to 445 conditions per place. [2024-06-27 20:19:36,563 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 89 selfloop transitions, 14 changer transitions 0/105 dead transitions. [2024-06-27 20:19:36,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 105 transitions, 915 flow [2024-06-27 20:19:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-27 20:19:36,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3727598566308244 [2024-06-27 20:19:36,564 INFO L175 Difference]: Start difference. First operand has 110 places, 86 transitions, 649 flow. Second operand 9 states and 104 transitions. [2024-06-27 20:19:36,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 105 transitions, 915 flow [2024-06-27 20:19:36,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 105 transitions, 864 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 20:19:36,579 INFO L231 Difference]: Finished difference. Result has 110 places, 88 transitions, 653 flow [2024-06-27 20:19:36,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=653, PETRI_PLACES=110, PETRI_TRANSITIONS=88} [2024-06-27 20:19:36,580 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2024-06-27 20:19:36,580 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 88 transitions, 653 flow [2024-06-27 20:19:36,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:36,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:36,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:36,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:19:36,580 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:36,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash -806654181, now seen corresponding path program 2 times [2024-06-27 20:19:36,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:36,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406283681] [2024-06-27 20:19:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:36,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:37,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:37,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406283681] [2024-06-27 20:19:37,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406283681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:37,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:37,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:37,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909183934] [2024-06-27 20:19:37,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:37,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:37,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:37,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:37,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:37,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:37,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 88 transitions, 653 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:37,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:37,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:37,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:37,391 INFO L124 PetriNetUnfolderBase]: 322/565 cut-off events. [2024-06-27 20:19:37,391 INFO L125 PetriNetUnfolderBase]: For 24041/24041 co-relation queries the response was YES. [2024-06-27 20:19:37,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3628 conditions, 565 events. 322/565 cut-off events. For 24041/24041 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2245 event pairs, 53 based on Foata normal form. 3/566 useless extension candidates. Maximal degree in co-relation 3573. Up to 366 conditions per place. [2024-06-27 20:19:37,394 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 78 selfloop transitions, 39 changer transitions 0/119 dead transitions. [2024-06-27 20:19:37,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 1231 flow [2024-06-27 20:19:37,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:37,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:37,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-27 20:19:37,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2024-06-27 20:19:37,396 INFO L175 Difference]: Start difference. First operand has 110 places, 88 transitions, 653 flow. Second operand 9 states and 121 transitions. [2024-06-27 20:19:37,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 1231 flow [2024-06-27 20:19:37,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 119 transitions, 1192 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:37,414 INFO L231 Difference]: Finished difference. Result has 112 places, 96 transitions, 789 flow [2024-06-27 20:19:37,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=789, PETRI_PLACES=112, PETRI_TRANSITIONS=96} [2024-06-27 20:19:37,415 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-06-27 20:19:37,415 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 96 transitions, 789 flow [2024-06-27 20:19:37,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:37,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:37,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:37,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:19:37,415 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:37,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1600927277, now seen corresponding path program 2 times [2024-06-27 20:19:37,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:37,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815365970] [2024-06-27 20:19:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:37,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:38,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:38,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815365970] [2024-06-27 20:19:38,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815365970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:38,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:38,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:38,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876397507] [2024-06-27 20:19:38,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:38,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:38,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:38,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:38,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:38,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:38,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 96 transitions, 789 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:38,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:38,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:38,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:38,296 INFO L124 PetriNetUnfolderBase]: 325/570 cut-off events. [2024-06-27 20:19:38,296 INFO L125 PetriNetUnfolderBase]: For 24565/24565 co-relation queries the response was YES. [2024-06-27 20:19:38,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3780 conditions, 570 events. 325/570 cut-off events. For 24565/24565 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2269 event pairs, 62 based on Foata normal form. 1/569 useless extension candidates. Maximal degree in co-relation 3724. Up to 493 conditions per place. [2024-06-27 20:19:38,299 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 75 selfloop transitions, 33 changer transitions 0/110 dead transitions. [2024-06-27 20:19:38,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 110 transitions, 1057 flow [2024-06-27 20:19:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:38,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:38,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-27 20:19:38,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-27 20:19:38,300 INFO L175 Difference]: Start difference. First operand has 112 places, 96 transitions, 789 flow. Second operand 9 states and 106 transitions. [2024-06-27 20:19:38,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 110 transitions, 1057 flow [2024-06-27 20:19:38,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 110 transitions, 1018 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 20:19:38,319 INFO L231 Difference]: Finished difference. Result has 118 places, 98 transitions, 849 flow [2024-06-27 20:19:38,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=849, PETRI_PLACES=118, PETRI_TRANSITIONS=98} [2024-06-27 20:19:38,319 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-06-27 20:19:38,319 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 98 transitions, 849 flow [2024-06-27 20:19:38,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:38,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:38,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:38,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:19:38,320 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:38,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:38,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1736232771, now seen corresponding path program 3 times [2024-06-27 20:19:38,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:38,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689832386] [2024-06-27 20:19:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:38,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:38,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:38,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689832386] [2024-06-27 20:19:38,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689832386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:38,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:38,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:38,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655265917] [2024-06-27 20:19:38,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:38,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:38,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:38,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:38,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:38,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:38,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 98 transitions, 849 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:38,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:38,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:38,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:39,101 INFO L124 PetriNetUnfolderBase]: 319/561 cut-off events. [2024-06-27 20:19:39,101 INFO L125 PetriNetUnfolderBase]: For 25138/25138 co-relation queries the response was YES. [2024-06-27 20:19:39,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3708 conditions, 561 events. 319/561 cut-off events. For 25138/25138 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2223 event pairs, 53 based on Foata normal form. 3/562 useless extension candidates. Maximal degree in co-relation 3650. Up to 367 conditions per place. [2024-06-27 20:19:39,104 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 75 selfloop transitions, 41 changer transitions 0/118 dead transitions. [2024-06-27 20:19:39,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 118 transitions, 1271 flow [2024-06-27 20:19:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:39,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-27 20:19:39,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:19:39,105 INFO L175 Difference]: Start difference. First operand has 118 places, 98 transitions, 849 flow. Second operand 9 states and 117 transitions. [2024-06-27 20:19:39,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 118 transitions, 1271 flow [2024-06-27 20:19:39,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 118 transitions, 1176 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:39,126 INFO L231 Difference]: Finished difference. Result has 120 places, 98 transitions, 841 flow [2024-06-27 20:19:39,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=841, PETRI_PLACES=120, PETRI_TRANSITIONS=98} [2024-06-27 20:19:39,126 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 90 predicate places. [2024-06-27 20:19:39,126 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 98 transitions, 841 flow [2024-06-27 20:19:39,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:39,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:39,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:39,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:19:39,127 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:39,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:39,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1736048321, now seen corresponding path program 3 times [2024-06-27 20:19:39,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:39,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149681497] [2024-06-27 20:19:39,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:39,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:39,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:39,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149681497] [2024-06-27 20:19:39,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149681497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:39,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:39,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:39,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016267867] [2024-06-27 20:19:39,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:39,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:39,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:39,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:39,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:39,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-27 20:19:39,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 98 transitions, 841 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:39,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:39,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-27 20:19:39,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:40,018 INFO L124 PetriNetUnfolderBase]: 310/556 cut-off events. [2024-06-27 20:19:40,018 INFO L125 PetriNetUnfolderBase]: For 26419/26419 co-relation queries the response was YES. [2024-06-27 20:19:40,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3744 conditions, 556 events. 310/556 cut-off events. For 26419/26419 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2267 event pairs, 53 based on Foata normal form. 2/556 useless extension candidates. Maximal degree in co-relation 3685. Up to 470 conditions per place. [2024-06-27 20:19:40,021 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 77 selfloop transitions, 20 changer transitions 0/112 dead transitions. [2024-06-27 20:19:40,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 112 transitions, 1083 flow [2024-06-27 20:19:40,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-27 20:19:40,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-27 20:19:40,022 INFO L175 Difference]: Start difference. First operand has 120 places, 98 transitions, 841 flow. Second operand 9 states and 111 transitions. [2024-06-27 20:19:40,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 112 transitions, 1083 flow [2024-06-27 20:19:40,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 112 transitions, 1006 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:40,046 INFO L231 Difference]: Finished difference. Result has 122 places, 99 transitions, 828 flow [2024-06-27 20:19:40,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=828, PETRI_PLACES=122, PETRI_TRANSITIONS=99} [2024-06-27 20:19:40,046 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-06-27 20:19:40,046 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 99 transitions, 828 flow [2024-06-27 20:19:40,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:40,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:40,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:40,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:19:40,047 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:40,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:40,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1736053281, now seen corresponding path program 4 times [2024-06-27 20:19:40,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:40,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607560827] [2024-06-27 20:19:40,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:40,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:40,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:40,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607560827] [2024-06-27 20:19:40,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607560827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:40,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:40,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:40,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549315147] [2024-06-27 20:19:40,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:40,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:40,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:40,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:40,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:40,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:40,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 99 transitions, 828 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:40,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:40,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:40,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:40,798 INFO L124 PetriNetUnfolderBase]: 317/560 cut-off events. [2024-06-27 20:19:40,798 INFO L125 PetriNetUnfolderBase]: For 26044/26044 co-relation queries the response was YES. [2024-06-27 20:19:40,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3620 conditions, 560 events. 317/560 cut-off events. For 26044/26044 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2234 event pairs, 51 based on Foata normal form. 3/561 useless extension candidates. Maximal degree in co-relation 3560. Up to 371 conditions per place. [2024-06-27 20:19:40,801 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 80 selfloop transitions, 38 changer transitions 0/120 dead transitions. [2024-06-27 20:19:40,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 120 transitions, 1192 flow [2024-06-27 20:19:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:40,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-27 20:19:40,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-06-27 20:19:40,817 INFO L175 Difference]: Start difference. First operand has 122 places, 99 transitions, 828 flow. Second operand 9 states and 120 transitions. [2024-06-27 20:19:40,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 120 transitions, 1192 flow [2024-06-27 20:19:40,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 120 transitions, 1130 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:40,844 INFO L231 Difference]: Finished difference. Result has 124 places, 99 transitions, 847 flow [2024-06-27 20:19:40,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=847, PETRI_PLACES=124, PETRI_TRANSITIONS=99} [2024-06-27 20:19:40,845 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 94 predicate places. [2024-06-27 20:19:40,845 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 99 transitions, 847 flow [2024-06-27 20:19:40,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:40,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:40,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:40,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:19:40,846 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:40,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:40,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1736048445, now seen corresponding path program 3 times [2024-06-27 20:19:40,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:40,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198772571] [2024-06-27 20:19:40,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:40,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:41,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:41,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198772571] [2024-06-27 20:19:41,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198772571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:41,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:41,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:41,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081964264] [2024-06-27 20:19:41,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:41,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:41,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:41,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:41,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:41,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:41,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 99 transitions, 847 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:41,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:41,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:41,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:41,862 INFO L124 PetriNetUnfolderBase]: 320/565 cut-off events. [2024-06-27 20:19:41,862 INFO L125 PetriNetUnfolderBase]: For 25940/25940 co-relation queries the response was YES. [2024-06-27 20:19:41,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3708 conditions, 565 events. 320/565 cut-off events. For 25940/25940 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2263 event pairs, 54 based on Foata normal form. 1/564 useless extension candidates. Maximal degree in co-relation 3647. Up to 480 conditions per place. [2024-06-27 20:19:41,865 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 76 selfloop transitions, 36 changer transitions 0/114 dead transitions. [2024-06-27 20:19:41,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 114 transitions, 1129 flow [2024-06-27 20:19:41,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:41,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-27 20:19:41,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-27 20:19:41,877 INFO L175 Difference]: Start difference. First operand has 124 places, 99 transitions, 847 flow. Second operand 10 states and 117 transitions. [2024-06-27 20:19:41,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 114 transitions, 1129 flow [2024-06-27 20:19:41,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 114 transitions, 1026 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 20:19:41,903 INFO L231 Difference]: Finished difference. Result has 125 places, 101 transitions, 854 flow [2024-06-27 20:19:41,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=854, PETRI_PLACES=125, PETRI_TRANSITIONS=101} [2024-06-27 20:19:41,903 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2024-06-27 20:19:41,904 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 101 transitions, 854 flow [2024-06-27 20:19:41,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:41,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:41,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:41,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:19:41,907 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:41,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:41,907 INFO L85 PathProgramCache]: Analyzing trace with hash 171856761, now seen corresponding path program 4 times [2024-06-27 20:19:41,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:41,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64633299] [2024-06-27 20:19:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:41,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:42,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:42,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64633299] [2024-06-27 20:19:42,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64633299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:42,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:42,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:42,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787864574] [2024-06-27 20:19:42,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:42,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:42,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:42,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:42,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:42,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:42,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 101 transitions, 854 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:42,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:42,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:42,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:42,732 INFO L124 PetriNetUnfolderBase]: 323/570 cut-off events. [2024-06-27 20:19:42,732 INFO L125 PetriNetUnfolderBase]: For 27086/27086 co-relation queries the response was YES. [2024-06-27 20:19:42,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3757 conditions, 570 events. 323/570 cut-off events. For 27086/27086 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2284 event pairs, 52 based on Foata normal form. 1/569 useless extension candidates. Maximal degree in co-relation 3695. Up to 532 conditions per place. [2024-06-27 20:19:42,735 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 89 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2024-06-27 20:19:42,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 112 transitions, 1126 flow [2024-06-27 20:19:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-27 20:19:42,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-27 20:19:42,745 INFO L175 Difference]: Start difference. First operand has 125 places, 101 transitions, 854 flow. Second operand 9 states and 100 transitions. [2024-06-27 20:19:42,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 112 transitions, 1126 flow [2024-06-27 20:19:42,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 112 transitions, 1034 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:42,774 INFO L231 Difference]: Finished difference. Result has 126 places, 103 transitions, 845 flow [2024-06-27 20:19:42,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=845, PETRI_PLACES=126, PETRI_TRANSITIONS=103} [2024-06-27 20:19:42,775 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2024-06-27 20:19:42,775 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 103 transitions, 845 flow [2024-06-27 20:19:42,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:42,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:42,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:42,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:19:42,775 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:42,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:42,776 INFO L85 PathProgramCache]: Analyzing trace with hash 160925141, now seen corresponding path program 5 times [2024-06-27 20:19:42,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:42,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042439693] [2024-06-27 20:19:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:42,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:43,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:43,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042439693] [2024-06-27 20:19:43,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042439693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:43,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:43,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:43,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114053212] [2024-06-27 20:19:43,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:43,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:43,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:43,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:43,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:43,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:43,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 103 transitions, 845 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:43,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:43,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:43,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:43,621 INFO L124 PetriNetUnfolderBase]: 362/633 cut-off events. [2024-06-27 20:19:43,621 INFO L125 PetriNetUnfolderBase]: For 35273/35273 co-relation queries the response was YES. [2024-06-27 20:19:43,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4343 conditions, 633 events. 362/633 cut-off events. For 35273/35273 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2629 event pairs, 58 based on Foata normal form. 3/634 useless extension candidates. Maximal degree in co-relation 4280. Up to 501 conditions per place. [2024-06-27 20:19:43,625 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 99 selfloop transitions, 28 changer transitions 0/129 dead transitions. [2024-06-27 20:19:43,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 129 transitions, 1467 flow [2024-06-27 20:19:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-27 20:19:43,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-27 20:19:43,626 INFO L175 Difference]: Start difference. First operand has 126 places, 103 transitions, 845 flow. Second operand 9 states and 115 transitions. [2024-06-27 20:19:43,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 129 transitions, 1467 flow [2024-06-27 20:19:43,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 129 transitions, 1400 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:43,660 INFO L231 Difference]: Finished difference. Result has 128 places, 109 transitions, 917 flow [2024-06-27 20:19:43,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=917, PETRI_PLACES=128, PETRI_TRANSITIONS=109} [2024-06-27 20:19:43,660 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-27 20:19:43,661 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 109 transitions, 917 flow [2024-06-27 20:19:43,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:43,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:43,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:43,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:19:43,661 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:43,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:43,661 INFO L85 PathProgramCache]: Analyzing trace with hash 160931651, now seen corresponding path program 6 times [2024-06-27 20:19:43,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:43,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351315543] [2024-06-27 20:19:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:43,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:44,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:44,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351315543] [2024-06-27 20:19:44,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351315543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:44,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:44,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:44,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639476892] [2024-06-27 20:19:44,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:44,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:44,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:44,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:44,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:44,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:44,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 109 transitions, 917 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:44,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:44,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:44,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:44,475 INFO L124 PetriNetUnfolderBase]: 356/624 cut-off events. [2024-06-27 20:19:44,475 INFO L125 PetriNetUnfolderBase]: For 34570/34570 co-relation queries the response was YES. [2024-06-27 20:19:44,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4240 conditions, 624 events. 356/624 cut-off events. For 34570/34570 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2574 event pairs, 58 based on Foata normal form. 3/625 useless extension candidates. Maximal degree in co-relation 4176. Up to 497 conditions per place. [2024-06-27 20:19:44,479 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 95 selfloop transitions, 29 changer transitions 0/126 dead transitions. [2024-06-27 20:19:44,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 126 transitions, 1371 flow [2024-06-27 20:19:44,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:44,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-27 20:19:44,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-27 20:19:44,489 INFO L175 Difference]: Start difference. First operand has 128 places, 109 transitions, 917 flow. Second operand 9 states and 111 transitions. [2024-06-27 20:19:44,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 126 transitions, 1371 flow [2024-06-27 20:19:44,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 126 transitions, 1285 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:44,525 INFO L231 Difference]: Finished difference. Result has 132 places, 109 transitions, 894 flow [2024-06-27 20:19:44,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=894, PETRI_PLACES=132, PETRI_TRANSITIONS=109} [2024-06-27 20:19:44,527 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2024-06-27 20:19:44,528 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 109 transitions, 894 flow [2024-06-27 20:19:44,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:44,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:44,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:44,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:19:44,532 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:44,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:44,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1607103797, now seen corresponding path program 4 times [2024-06-27 20:19:44,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:44,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338798902] [2024-06-27 20:19:44,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:44,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:45,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:45,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338798902] [2024-06-27 20:19:45,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338798902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:45,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:45,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:45,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625139791] [2024-06-27 20:19:45,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:45,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:45,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:45,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:45,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:45,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-27 20:19:45,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 109 transitions, 894 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:45,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:45,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-27 20:19:45,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:45,551 INFO L124 PetriNetUnfolderBase]: 339/605 cut-off events. [2024-06-27 20:19:45,551 INFO L125 PetriNetUnfolderBase]: For 33324/33324 co-relation queries the response was YES. [2024-06-27 20:19:45,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4032 conditions, 605 events. 339/605 cut-off events. For 33324/33324 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2535 event pairs, 59 based on Foata normal form. 2/605 useless extension candidates. Maximal degree in co-relation 3967. Up to 542 conditions per place. [2024-06-27 20:19:45,554 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 89 selfloop transitions, 13 changer transitions 0/119 dead transitions. [2024-06-27 20:19:45,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 119 transitions, 1120 flow [2024-06-27 20:19:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-27 20:19:45,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3727598566308244 [2024-06-27 20:19:45,556 INFO L175 Difference]: Start difference. First operand has 132 places, 109 transitions, 894 flow. Second operand 9 states and 104 transitions. [2024-06-27 20:19:45,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 119 transitions, 1120 flow [2024-06-27 20:19:45,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 119 transitions, 1064 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:45,593 INFO L231 Difference]: Finished difference. Result has 134 places, 109 transitions, 868 flow [2024-06-27 20:19:45,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=868, PETRI_PLACES=134, PETRI_TRANSITIONS=109} [2024-06-27 20:19:45,593 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2024-06-27 20:19:45,594 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 109 transitions, 868 flow [2024-06-27 20:19:45,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:45,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:45,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:45,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:19:45,594 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:45,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:45,594 INFO L85 PathProgramCache]: Analyzing trace with hash 160747325, now seen corresponding path program 5 times [2024-06-27 20:19:45,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:45,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241078326] [2024-06-27 20:19:45,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:45,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:46,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:46,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241078326] [2024-06-27 20:19:46,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241078326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:46,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:46,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:46,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711336918] [2024-06-27 20:19:46,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:46,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:46,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:46,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:46,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:46,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:46,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 109 transitions, 868 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:46,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:46,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:46,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:46,542 INFO L124 PetriNetUnfolderBase]: 356/624 cut-off events. [2024-06-27 20:19:46,542 INFO L125 PetriNetUnfolderBase]: For 33655/33655 co-relation queries the response was YES. [2024-06-27 20:19:46,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4109 conditions, 624 events. 356/624 cut-off events. For 33655/33655 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2579 event pairs, 61 based on Foata normal form. 1/623 useless extension candidates. Maximal degree in co-relation 4043. Up to 574 conditions per place. [2024-06-27 20:19:46,546 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 94 selfloop transitions, 28 changer transitions 0/124 dead transitions. [2024-06-27 20:19:46,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 124 transitions, 1294 flow [2024-06-27 20:19:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-27 20:19:46,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:19:46,546 INFO L175 Difference]: Start difference. First operand has 134 places, 109 transitions, 868 flow. Second operand 10 states and 110 transitions. [2024-06-27 20:19:46,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 124 transitions, 1294 flow [2024-06-27 20:19:46,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 124 transitions, 1225 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 20:19:46,584 INFO L231 Difference]: Finished difference. Result has 135 places, 113 transitions, 937 flow [2024-06-27 20:19:46,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=937, PETRI_PLACES=135, PETRI_TRANSITIONS=113} [2024-06-27 20:19:46,584 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-27 20:19:46,584 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 113 transitions, 937 flow [2024-06-27 20:19:46,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:46,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:46,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:46,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:19:46,585 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:46,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:46,585 INFO L85 PathProgramCache]: Analyzing trace with hash 282288123, now seen corresponding path program 7 times [2024-06-27 20:19:46,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:46,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53327125] [2024-06-27 20:19:46,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:46,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:47,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:47,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53327125] [2024-06-27 20:19:47,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53327125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:47,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:47,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:47,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330429448] [2024-06-27 20:19:47,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:47,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:47,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:47,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:47,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:47,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:47,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 113 transitions, 937 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:47,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:47,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:47,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:47,381 INFO L124 PetriNetUnfolderBase]: 350/615 cut-off events. [2024-06-27 20:19:47,381 INFO L125 PetriNetUnfolderBase]: For 34312/34312 co-relation queries the response was YES. [2024-06-27 20:19:47,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3964 conditions, 615 events. 350/615 cut-off events. For 34312/34312 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2542 event pairs, 51 based on Foata normal form. 3/616 useless extension candidates. Maximal degree in co-relation 3898. Up to 493 conditions per place. [2024-06-27 20:19:47,384 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 96 selfloop transitions, 31 changer transitions 0/129 dead transitions. [2024-06-27 20:19:47,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 129 transitions, 1319 flow [2024-06-27 20:19:47,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-27 20:19:47,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-27 20:19:47,385 INFO L175 Difference]: Start difference. First operand has 135 places, 113 transitions, 937 flow. Second operand 9 states and 109 transitions. [2024-06-27 20:19:47,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 129 transitions, 1319 flow [2024-06-27 20:19:47,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 129 transitions, 1217 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:47,422 INFO L231 Difference]: Finished difference. Result has 136 places, 113 transitions, 902 flow [2024-06-27 20:19:47,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=902, PETRI_PLACES=136, PETRI_TRANSITIONS=113} [2024-06-27 20:19:47,423 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 106 predicate places. [2024-06-27 20:19:47,423 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 113 transitions, 902 flow [2024-06-27 20:19:47,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:47,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:47,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:47,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:19:47,424 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:47,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:47,424 INFO L85 PathProgramCache]: Analyzing trace with hash 388826105, now seen corresponding path program 6 times [2024-06-27 20:19:47,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:47,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695807492] [2024-06-27 20:19:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:47,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:47,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:47,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695807492] [2024-06-27 20:19:47,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695807492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:47,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:47,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:47,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686017255] [2024-06-27 20:19:47,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:47,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:47,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:47,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:47,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:48,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:48,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 113 transitions, 902 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:48,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:48,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:48,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:48,285 INFO L124 PetriNetUnfolderBase]: 348/612 cut-off events. [2024-06-27 20:19:48,285 INFO L125 PetriNetUnfolderBase]: For 32319/32319 co-relation queries the response was YES. [2024-06-27 20:19:48,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3876 conditions, 612 events. 348/612 cut-off events. For 32319/32319 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2523 event pairs, 59 based on Foata normal form. 1/611 useless extension candidates. Maximal degree in co-relation 3810. Up to 589 conditions per place. [2024-06-27 20:19:48,301 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 106 selfloop transitions, 14 changer transitions 0/122 dead transitions. [2024-06-27 20:19:48,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 122 transitions, 1162 flow [2024-06-27 20:19:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-27 20:19:48,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-27 20:19:48,302 INFO L175 Difference]: Start difference. First operand has 136 places, 113 transitions, 902 flow. Second operand 9 states and 96 transitions. [2024-06-27 20:19:48,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 122 transitions, 1162 flow [2024-06-27 20:19:48,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 122 transitions, 1078 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:48,338 INFO L231 Difference]: Finished difference. Result has 137 places, 113 transitions, 851 flow [2024-06-27 20:19:48,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=851, PETRI_PLACES=137, PETRI_TRANSITIONS=113} [2024-06-27 20:19:48,339 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2024-06-27 20:19:48,339 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 113 transitions, 851 flow [2024-06-27 20:19:48,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:48,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:48,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:48,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:19:48,339 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:48,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:48,340 INFO L85 PathProgramCache]: Analyzing trace with hash 397107011, now seen corresponding path program 8 times [2024-06-27 20:19:48,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:48,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733381382] [2024-06-27 20:19:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:48,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:48,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:48,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733381382] [2024-06-27 20:19:48,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733381382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:48,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:48,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:48,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77396353] [2024-06-27 20:19:48,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:48,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:48,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:48,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:48,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:48,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:48,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 113 transitions, 851 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:48,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:48,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:48,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:49,157 INFO L124 PetriNetUnfolderBase]: 357/627 cut-off events. [2024-06-27 20:19:49,157 INFO L125 PetriNetUnfolderBase]: For 35651/35651 co-relation queries the response was YES. [2024-06-27 20:19:49,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3910 conditions, 627 events. 357/627 cut-off events. For 35651/35651 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2617 event pairs, 59 based on Foata normal form. 3/628 useless extension candidates. Maximal degree in co-relation 3843. Up to 588 conditions per place. [2024-06-27 20:19:49,160 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 112 selfloop transitions, 14 changer transitions 0/128 dead transitions. [2024-06-27 20:19:49,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 128 transitions, 1159 flow [2024-06-27 20:19:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-27 20:19:49,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-27 20:19:49,162 INFO L175 Difference]: Start difference. First operand has 137 places, 113 transitions, 851 flow. Second operand 9 states and 100 transitions. [2024-06-27 20:19:49,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 128 transitions, 1159 flow [2024-06-27 20:19:49,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 128 transitions, 1119 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:49,205 INFO L231 Difference]: Finished difference. Result has 138 places, 115 transitions, 872 flow [2024-06-27 20:19:49,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=872, PETRI_PLACES=138, PETRI_TRANSITIONS=115} [2024-06-27 20:19:49,206 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 108 predicate places. [2024-06-27 20:19:49,206 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 115 transitions, 872 flow [2024-06-27 20:19:49,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:49,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:49,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:49,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:19:49,206 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:49,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:49,206 INFO L85 PathProgramCache]: Analyzing trace with hash 388832801, now seen corresponding path program 9 times [2024-06-27 20:19:49,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:49,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997150292] [2024-06-27 20:19:49,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:49,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:49,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:49,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997150292] [2024-06-27 20:19:49,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997150292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:49,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:49,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:49,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061962619] [2024-06-27 20:19:49,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:49,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:49,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:49,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:49,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:49,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:49,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 115 transitions, 872 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:49,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:49,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:49,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:49,996 INFO L124 PetriNetUnfolderBase]: 366/642 cut-off events. [2024-06-27 20:19:49,996 INFO L125 PetriNetUnfolderBase]: For 37599/37599 co-relation queries the response was YES. [2024-06-27 20:19:49,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4041 conditions, 642 events. 366/642 cut-off events. For 37599/37599 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2693 event pairs, 59 based on Foata normal form. 3/643 useless extension candidates. Maximal degree in co-relation 3973. Up to 561 conditions per place. [2024-06-27 20:19:49,999 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 110 selfloop transitions, 21 changer transitions 0/133 dead transitions. [2024-06-27 20:19:50,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 133 transitions, 1296 flow [2024-06-27 20:19:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-27 20:19:50,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835125448028674 [2024-06-27 20:19:50,000 INFO L175 Difference]: Start difference. First operand has 138 places, 115 transitions, 872 flow. Second operand 9 states and 107 transitions. [2024-06-27 20:19:50,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 133 transitions, 1296 flow [2024-06-27 20:19:50,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 133 transitions, 1257 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:50,045 INFO L231 Difference]: Finished difference. Result has 140 places, 117 transitions, 908 flow [2024-06-27 20:19:50,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=908, PETRI_PLACES=140, PETRI_TRANSITIONS=117} [2024-06-27 20:19:50,045 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 110 predicate places. [2024-06-27 20:19:50,045 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 117 transitions, 908 flow [2024-06-27 20:19:50,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:50,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:50,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:50,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:19:50,046 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:50,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:50,046 INFO L85 PathProgramCache]: Analyzing trace with hash 397115629, now seen corresponding path program 1 times [2024-06-27 20:19:50,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:50,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190074712] [2024-06-27 20:19:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:50,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:50,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:50,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190074712] [2024-06-27 20:19:50,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190074712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:50,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:50,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:50,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043660252] [2024-06-27 20:19:50,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:50,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:50,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:50,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:50,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:50,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:50,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 117 transitions, 908 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:50,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:50,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:50,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:50,943 INFO L124 PetriNetUnfolderBase]: 362/636 cut-off events. [2024-06-27 20:19:50,943 INFO L125 PetriNetUnfolderBase]: For 35744/35744 co-relation queries the response was YES. [2024-06-27 20:19:50,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3962 conditions, 636 events. 362/636 cut-off events. For 35744/35744 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2650 event pairs, 55 based on Foata normal form. 2/636 useless extension candidates. Maximal degree in co-relation 3893. Up to 605 conditions per place. [2024-06-27 20:19:50,947 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 114 selfloop transitions, 14 changer transitions 0/130 dead transitions. [2024-06-27 20:19:50,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 130 transitions, 1204 flow [2024-06-27 20:19:50,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:50,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-27 20:19:50,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-27 20:19:50,948 INFO L175 Difference]: Start difference. First operand has 140 places, 117 transitions, 908 flow. Second operand 9 states and 98 transitions. [2024-06-27 20:19:50,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 130 transitions, 1204 flow [2024-06-27 20:19:50,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 130 transitions, 1136 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:50,988 INFO L231 Difference]: Finished difference. Result has 142 places, 119 transitions, 893 flow [2024-06-27 20:19:50,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=893, PETRI_PLACES=142, PETRI_TRANSITIONS=119} [2024-06-27 20:19:50,989 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2024-06-27 20:19:50,989 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 119 transitions, 893 flow [2024-06-27 20:19:50,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:50,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:50,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:50,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:19:50,989 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:50,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:50,990 INFO L85 PathProgramCache]: Analyzing trace with hash -634758937, now seen corresponding path program 10 times [2024-06-27 20:19:50,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:50,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158463178] [2024-06-27 20:19:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:50,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:51,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:51,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158463178] [2024-06-27 20:19:51,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158463178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:51,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:51,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:51,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421659127] [2024-06-27 20:19:51,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:51,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:51,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:51,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:51,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:51,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 119 transitions, 893 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:51,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:51,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:51,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:51,799 INFO L124 PetriNetUnfolderBase]: 356/627 cut-off events. [2024-06-27 20:19:51,799 INFO L125 PetriNetUnfolderBase]: For 34247/34247 co-relation queries the response was YES. [2024-06-27 20:19:51,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3750 conditions, 627 events. 356/627 cut-off events. For 34247/34247 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2629 event pairs, 50 based on Foata normal form. 3/628 useless extension candidates. Maximal degree in co-relation 3680. Up to 551 conditions per place. [2024-06-27 20:19:51,803 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 110 selfloop transitions, 22 changer transitions 0/134 dead transitions. [2024-06-27 20:19:51,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 134 transitions, 1195 flow [2024-06-27 20:19:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-27 20:19:51,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-27 20:19:51,804 INFO L175 Difference]: Start difference. First operand has 142 places, 119 transitions, 893 flow. Second operand 9 states and 105 transitions. [2024-06-27 20:19:51,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 134 transitions, 1195 flow [2024-06-27 20:19:51,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 134 transitions, 1139 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:51,848 INFO L231 Difference]: Finished difference. Result has 144 places, 119 transitions, 886 flow [2024-06-27 20:19:51,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=886, PETRI_PLACES=144, PETRI_TRANSITIONS=119} [2024-06-27 20:19:51,848 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 114 predicate places. [2024-06-27 20:19:51,848 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 119 transitions, 886 flow [2024-06-27 20:19:51,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:51,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:51,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:51,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:19:51,849 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:51,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:51,849 INFO L85 PathProgramCache]: Analyzing trace with hash 397414841, now seen corresponding path program 1 times [2024-06-27 20:19:51,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:51,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812302366] [2024-06-27 20:19:51,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:51,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:52,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:52,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812302366] [2024-06-27 20:19:52,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812302366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:52,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:52,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:52,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393700646] [2024-06-27 20:19:52,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:52,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:52,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:52,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:52,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:52,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:52,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 119 transitions, 886 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:52,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:52,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:52,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:53,045 INFO L124 PetriNetUnfolderBase]: 353/622 cut-off events. [2024-06-27 20:19:53,045 INFO L125 PetriNetUnfolderBase]: For 31781/31781 co-relation queries the response was YES. [2024-06-27 20:19:53,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3646 conditions, 622 events. 353/622 cut-off events. For 31781/31781 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2582 event pairs, 52 based on Foata normal form. 2/622 useless extension candidates. Maximal degree in co-relation 3575. Up to 593 conditions per place. [2024-06-27 20:19:53,048 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 115 selfloop transitions, 13 changer transitions 0/130 dead transitions. [2024-06-27 20:19:53,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 130 transitions, 1166 flow [2024-06-27 20:19:53,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-27 20:19:53,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-27 20:19:53,049 INFO L175 Difference]: Start difference. First operand has 144 places, 119 transitions, 886 flow. Second operand 9 states and 96 transitions. [2024-06-27 20:19:53,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 130 transitions, 1166 flow [2024-06-27 20:19:53,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 130 transitions, 1099 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 20:19:53,097 INFO L231 Difference]: Finished difference. Result has 144 places, 119 transitions, 849 flow [2024-06-27 20:19:53,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=849, PETRI_PLACES=144, PETRI_TRANSITIONS=119} [2024-06-27 20:19:53,098 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 114 predicate places. [2024-06-27 20:19:53,098 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 119 transitions, 849 flow [2024-06-27 20:19:53,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:53,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:53,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:53,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:19:53,098 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:53,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:53,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1763162841, now seen corresponding path program 1 times [2024-06-27 20:19:53,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:53,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403443888] [2024-06-27 20:19:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:53,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:53,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:53,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403443888] [2024-06-27 20:19:53,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403443888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:53,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:53,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:53,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133301140] [2024-06-27 20:19:53,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:53,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:53,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:53,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:53,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:53,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:53,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 119 transitions, 849 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:53,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:53,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:53,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:54,139 INFO L124 PetriNetUnfolderBase]: 364/643 cut-off events. [2024-06-27 20:19:54,139 INFO L125 PetriNetUnfolderBase]: For 35825/35825 co-relation queries the response was YES. [2024-06-27 20:19:54,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3848 conditions, 643 events. 364/643 cut-off events. For 35825/35825 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2730 event pairs, 37 based on Foata normal form. 2/643 useless extension candidates. Maximal degree in co-relation 3776. Up to 534 conditions per place. [2024-06-27 20:19:54,142 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 123 selfloop transitions, 20 changer transitions 0/145 dead transitions. [2024-06-27 20:19:54,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 145 transitions, 1333 flow [2024-06-27 20:19:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:19:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:19:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-27 20:19:54,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-27 20:19:54,143 INFO L175 Difference]: Start difference. First operand has 144 places, 119 transitions, 849 flow. Second operand 11 states and 128 transitions. [2024-06-27 20:19:54,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 145 transitions, 1333 flow [2024-06-27 20:19:54,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 145 transitions, 1301 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:54,192 INFO L231 Difference]: Finished difference. Result has 148 places, 121 transitions, 903 flow [2024-06-27 20:19:54,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=903, PETRI_PLACES=148, PETRI_TRANSITIONS=121} [2024-06-27 20:19:54,192 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2024-06-27 20:19:54,192 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 121 transitions, 903 flow [2024-06-27 20:19:54,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:54,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:54,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:54,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:19:54,193 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:54,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:54,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1711541476, now seen corresponding path program 1 times [2024-06-27 20:19:54,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:54,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941378970] [2024-06-27 20:19:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:54,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:54,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:54,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941378970] [2024-06-27 20:19:54,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941378970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:54,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:54,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:54,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940772533] [2024-06-27 20:19:54,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:54,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:54,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:54,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:54,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:54,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:54,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 121 transitions, 903 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:54,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:54,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:54,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:55,318 INFO L124 PetriNetUnfolderBase]: 373/658 cut-off events. [2024-06-27 20:19:55,318 INFO L125 PetriNetUnfolderBase]: For 38705/38705 co-relation queries the response was YES. [2024-06-27 20:19:55,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3995 conditions, 658 events. 373/658 cut-off events. For 38705/38705 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2816 event pairs, 55 based on Foata normal form. 3/659 useless extension candidates. Maximal degree in co-relation 3922. Up to 582 conditions per place. [2024-06-27 20:19:55,324 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 122 selfloop transitions, 25 changer transitions 0/149 dead transitions. [2024-06-27 20:19:55,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 149 transitions, 1293 flow [2024-06-27 20:19:55,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:19:55,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:19:55,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 145 transitions. [2024-06-27 20:19:55,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3598014888337469 [2024-06-27 20:19:55,325 INFO L175 Difference]: Start difference. First operand has 148 places, 121 transitions, 903 flow. Second operand 13 states and 145 transitions. [2024-06-27 20:19:55,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 149 transitions, 1293 flow [2024-06-27 20:19:55,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 149 transitions, 1244 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:55,388 INFO L231 Difference]: Finished difference. Result has 154 places, 124 transitions, 953 flow [2024-06-27 20:19:55,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=953, PETRI_PLACES=154, PETRI_TRANSITIONS=124} [2024-06-27 20:19:55,388 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2024-06-27 20:19:55,388 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 124 transitions, 953 flow [2024-06-27 20:19:55,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:55,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:55,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:55,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:19:55,389 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:55,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:55,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1763253051, now seen corresponding path program 2 times [2024-06-27 20:19:55,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:55,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113434063] [2024-06-27 20:19:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:55,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:56,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:56,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113434063] [2024-06-27 20:19:56,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113434063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:56,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:56,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:56,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342529534] [2024-06-27 20:19:56,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:56,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:56,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:56,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:56,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 124 transitions, 953 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:56,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:56,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:56,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:56,533 INFO L124 PetriNetUnfolderBase]: 377/666 cut-off events. [2024-06-27 20:19:56,534 INFO L125 PetriNetUnfolderBase]: For 39041/39041 co-relation queries the response was YES. [2024-06-27 20:19:56,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4127 conditions, 666 events. 377/666 cut-off events. For 39041/39041 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2852 event pairs, 59 based on Foata normal form. 2/666 useless extension candidates. Maximal degree in co-relation 4052. Up to 606 conditions per place. [2024-06-27 20:19:56,538 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 124 selfloop transitions, 21 changer transitions 0/147 dead transitions. [2024-06-27 20:19:56,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 147 transitions, 1311 flow [2024-06-27 20:19:56,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:19:56,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:19:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-27 20:19:56,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:19:56,539 INFO L175 Difference]: Start difference. First operand has 154 places, 124 transitions, 953 flow. Second operand 12 states and 132 transitions. [2024-06-27 20:19:56,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 147 transitions, 1311 flow [2024-06-27 20:19:56,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 147 transitions, 1236 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-27 20:19:56,594 INFO L231 Difference]: Finished difference. Result has 155 places, 125 transitions, 942 flow [2024-06-27 20:19:56,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=942, PETRI_PLACES=155, PETRI_TRANSITIONS=125} [2024-06-27 20:19:56,595 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2024-06-27 20:19:56,595 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 125 transitions, 942 flow [2024-06-27 20:19:56,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:56,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:56,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:56,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:19:56,595 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:56,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:56,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1382826871, now seen corresponding path program 3 times [2024-06-27 20:19:56,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:56,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700619321] [2024-06-27 20:19:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:56,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:57,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:57,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700619321] [2024-06-27 20:19:57,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700619321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:57,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:57,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:57,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615587963] [2024-06-27 20:19:57,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:57,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:57,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:57,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:57,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:57,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:57,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 125 transitions, 942 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:57,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:57,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:57,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:57,692 INFO L124 PetriNetUnfolderBase]: 374/661 cut-off events. [2024-06-27 20:19:57,692 INFO L125 PetriNetUnfolderBase]: For 37361/37361 co-relation queries the response was YES. [2024-06-27 20:19:57,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3957 conditions, 661 events. 374/661 cut-off events. For 37361/37361 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2835 event pairs, 56 based on Foata normal form. 2/661 useless extension candidates. Maximal degree in co-relation 3881. Up to 585 conditions per place. [2024-06-27 20:19:57,696 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 125 selfloop transitions, 20 changer transitions 0/147 dead transitions. [2024-06-27 20:19:57,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 147 transitions, 1284 flow [2024-06-27 20:19:57,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:19:57,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:19:57,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-27 20:19:57,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-27 20:19:57,697 INFO L175 Difference]: Start difference. First operand has 155 places, 125 transitions, 942 flow. Second operand 11 states and 126 transitions. [2024-06-27 20:19:57,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 147 transitions, 1284 flow [2024-06-27 20:19:57,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 147 transitions, 1220 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-27 20:19:57,749 INFO L231 Difference]: Finished difference. Result has 156 places, 125 transitions, 922 flow [2024-06-27 20:19:57,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=922, PETRI_PLACES=156, PETRI_TRANSITIONS=125} [2024-06-27 20:19:57,750 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 126 predicate places. [2024-06-27 20:19:57,750 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 125 transitions, 922 flow [2024-06-27 20:19:57,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:57,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:57,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:57,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:19:57,750 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:57,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:57,751 INFO L85 PathProgramCache]: Analyzing trace with hash -2011565682, now seen corresponding path program 2 times [2024-06-27 20:19:57,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:57,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482987481] [2024-06-27 20:19:57,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:57,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:58,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:58,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482987481] [2024-06-27 20:19:58,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482987481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:58,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:58,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:58,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722573989] [2024-06-27 20:19:58,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:58,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:58,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:58,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:58,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:58,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:58,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 125 transitions, 922 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:58,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:58,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:58,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:58,840 INFO L124 PetriNetUnfolderBase]: 398/700 cut-off events. [2024-06-27 20:19:58,841 INFO L125 PetriNetUnfolderBase]: For 45103/45103 co-relation queries the response was YES. [2024-06-27 20:19:58,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4374 conditions, 700 events. 398/700 cut-off events. For 45103/45103 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3044 event pairs, 55 based on Foata normal form. 3/701 useless extension candidates. Maximal degree in co-relation 4297. Up to 450 conditions per place. [2024-06-27 20:19:58,845 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 97 selfloop transitions, 57 changer transitions 0/156 dead transitions. [2024-06-27 20:19:58,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 156 transitions, 1494 flow [2024-06-27 20:19:58,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:19:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:19:58,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-27 20:19:58,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2024-06-27 20:19:58,846 INFO L175 Difference]: Start difference. First operand has 156 places, 125 transitions, 922 flow. Second operand 11 states and 142 transitions. [2024-06-27 20:19:58,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 156 transitions, 1494 flow [2024-06-27 20:19:58,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 156 transitions, 1447 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-27 20:19:58,908 INFO L231 Difference]: Finished difference. Result has 158 places, 131 transitions, 1095 flow [2024-06-27 20:19:58,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1095, PETRI_PLACES=158, PETRI_TRANSITIONS=131} [2024-06-27 20:19:58,908 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-06-27 20:19:58,908 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 131 transitions, 1095 flow [2024-06-27 20:19:58,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:58,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:58,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:58,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:19:58,908 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:19:58,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:58,909 INFO L85 PathProgramCache]: Analyzing trace with hash -2011565837, now seen corresponding path program 4 times [2024-06-27 20:19:58,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:58,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111757883] [2024-06-27 20:19:58,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:58,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:59,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:59,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111757883] [2024-06-27 20:19:59,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111757883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:59,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:59,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:59,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722785797] [2024-06-27 20:19:59,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:59,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:59,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:59,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:59,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:19:59,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 131 transitions, 1095 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:59,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:59,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:19:59,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:59,980 INFO L124 PetriNetUnfolderBase]: 402/708 cut-off events. [2024-06-27 20:19:59,980 INFO L125 PetriNetUnfolderBase]: For 45800/45800 co-relation queries the response was YES. [2024-06-27 20:19:59,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4696 conditions, 708 events. 402/708 cut-off events. For 45800/45800 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3093 event pairs, 65 based on Foata normal form. 2/708 useless extension candidates. Maximal degree in co-relation 4617. Up to 625 conditions per place. [2024-06-27 20:19:59,984 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 110 selfloop transitions, 34 changer transitions 0/146 dead transitions. [2024-06-27 20:19:59,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 146 transitions, 1437 flow [2024-06-27 20:19:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:59,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-27 20:19:59,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-27 20:19:59,985 INFO L175 Difference]: Start difference. First operand has 158 places, 131 transitions, 1095 flow. Second operand 10 states and 115 transitions. [2024-06-27 20:19:59,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 146 transitions, 1437 flow [2024-06-27 20:20:00,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 146 transitions, 1329 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:00,069 INFO L231 Difference]: Finished difference. Result has 161 places, 132 transitions, 1083 flow [2024-06-27 20:20:00,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1083, PETRI_PLACES=161, PETRI_TRANSITIONS=132} [2024-06-27 20:20:00,069 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 131 predicate places. [2024-06-27 20:20:00,069 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 132 transitions, 1083 flow [2024-06-27 20:20:00,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:00,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:00,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:00,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:20:00,070 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:00,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash 758012555, now seen corresponding path program 5 times [2024-06-27 20:20:00,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:00,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861064666] [2024-06-27 20:20:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:00,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:00,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:00,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861064666] [2024-06-27 20:20:00,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861064666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:00,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:00,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:00,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66197139] [2024-06-27 20:20:00,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:00,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:00,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:00,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:00,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:00,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:00,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 132 transitions, 1083 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:00,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:00,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:00,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:01,256 INFO L124 PetriNetUnfolderBase]: 406/716 cut-off events. [2024-06-27 20:20:01,256 INFO L125 PetriNetUnfolderBase]: For 47042/47042 co-relation queries the response was YES. [2024-06-27 20:20:01,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4732 conditions, 716 events. 406/716 cut-off events. For 47042/47042 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3153 event pairs, 67 based on Foata normal form. 2/716 useless extension candidates. Maximal degree in co-relation 4651. Up to 625 conditions per place. [2024-06-27 20:20:01,261 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 109 selfloop transitions, 37 changer transitions 0/148 dead transitions. [2024-06-27 20:20:01,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 148 transitions, 1433 flow [2024-06-27 20:20:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-27 20:20:01,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-27 20:20:01,262 INFO L175 Difference]: Start difference. First operand has 161 places, 132 transitions, 1083 flow. Second operand 11 states and 126 transitions. [2024-06-27 20:20:01,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 148 transitions, 1433 flow [2024-06-27 20:20:01,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 148 transitions, 1347 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:01,334 INFO L231 Difference]: Finished difference. Result has 164 places, 133 transitions, 1101 flow [2024-06-27 20:20:01,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1101, PETRI_PLACES=164, PETRI_TRANSITIONS=133} [2024-06-27 20:20:01,334 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 134 predicate places. [2024-06-27 20:20:01,334 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 133 transitions, 1101 flow [2024-06-27 20:20:01,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:01,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:01,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:01,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:20:01,335 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:01,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:01,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1859358466, now seen corresponding path program 3 times [2024-06-27 20:20:01,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:01,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418733540] [2024-06-27 20:20:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:01,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:02,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:02,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418733540] [2024-06-27 20:20:02,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418733540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:02,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:02,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:02,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823113505] [2024-06-27 20:20:02,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:02,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:02,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:02,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:02,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:02,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:02,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 133 transitions, 1101 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:02,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:02,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:02,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:02,318 INFO L124 PetriNetUnfolderBase]: 400/707 cut-off events. [2024-06-27 20:20:02,318 INFO L125 PetriNetUnfolderBase]: For 45129/45129 co-relation queries the response was YES. [2024-06-27 20:20:02,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4506 conditions, 707 events. 400/707 cut-off events. For 45129/45129 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3118 event pairs, 57 based on Foata normal form. 3/708 useless extension candidates. Maximal degree in co-relation 4424. Up to 477 conditions per place. [2024-06-27 20:20:02,323 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 97 selfloop transitions, 54 changer transitions 0/153 dead transitions. [2024-06-27 20:20:02,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 153 transitions, 1471 flow [2024-06-27 20:20:02,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-27 20:20:02,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-27 20:20:02,324 INFO L175 Difference]: Start difference. First operand has 164 places, 133 transitions, 1101 flow. Second operand 10 states and 126 transitions. [2024-06-27 20:20:02,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 153 transitions, 1471 flow [2024-06-27 20:20:02,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 153 transitions, 1353 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 20:20:02,388 INFO L231 Difference]: Finished difference. Result has 165 places, 133 transitions, 1097 flow [2024-06-27 20:20:02,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1097, PETRI_PLACES=165, PETRI_TRANSITIONS=133} [2024-06-27 20:20:02,388 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2024-06-27 20:20:02,388 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 133 transitions, 1097 flow [2024-06-27 20:20:02,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:02,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:02,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:02,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:20:02,389 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:02,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:02,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1853640671, now seen corresponding path program 6 times [2024-06-27 20:20:02,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:02,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739071010] [2024-06-27 20:20:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:02,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:03,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:03,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739071010] [2024-06-27 20:20:03,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739071010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:03,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:03,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:03,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660459396] [2024-06-27 20:20:03,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:03,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:03,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:03,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:03,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:03,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:03,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 133 transitions, 1097 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:03,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:03,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:03,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:03,400 INFO L124 PetriNetUnfolderBase]: 404/715 cut-off events. [2024-06-27 20:20:03,400 INFO L125 PetriNetUnfolderBase]: For 44924/44924 co-relation queries the response was YES. [2024-06-27 20:20:03,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4590 conditions, 715 events. 404/715 cut-off events. For 44924/44924 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3162 event pairs, 64 based on Foata normal form. 2/715 useless extension candidates. Maximal degree in co-relation 4507. Up to 604 conditions per place. [2024-06-27 20:20:03,405 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 109 selfloop transitions, 38 changer transitions 0/149 dead transitions. [2024-06-27 20:20:03,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 149 transitions, 1451 flow [2024-06-27 20:20:03,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:03,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:03,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-27 20:20:03,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-27 20:20:03,406 INFO L175 Difference]: Start difference. First operand has 165 places, 133 transitions, 1097 flow. Second operand 10 states and 118 transitions. [2024-06-27 20:20:03,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 149 transitions, 1451 flow [2024-06-27 20:20:03,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 149 transitions, 1338 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 20:20:03,465 INFO L231 Difference]: Finished difference. Result has 166 places, 134 transitions, 1092 flow [2024-06-27 20:20:03,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1092, PETRI_PLACES=166, PETRI_TRANSITIONS=134} [2024-06-27 20:20:03,466 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2024-06-27 20:20:03,466 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 134 transitions, 1092 flow [2024-06-27 20:20:03,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:03,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:03,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:03,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:20:03,467 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:03,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:03,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1862114396, now seen corresponding path program 4 times [2024-06-27 20:20:03,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:03,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293936322] [2024-06-27 20:20:03,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:03,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:04,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:04,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293936322] [2024-06-27 20:20:04,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293936322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:04,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:04,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:04,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286884092] [2024-06-27 20:20:04,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:04,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:04,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:04,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:04,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:04,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:04,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 134 transitions, 1092 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:04,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:04,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:04,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:04,619 INFO L124 PetriNetUnfolderBase]: 416/735 cut-off events. [2024-06-27 20:20:04,619 INFO L125 PetriNetUnfolderBase]: For 48437/48437 co-relation queries the response was YES. [2024-06-27 20:20:04,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4682 conditions, 735 events. 416/735 cut-off events. For 48437/48437 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3283 event pairs, 57 based on Foata normal form. 3/736 useless extension candidates. Maximal degree in co-relation 4598. Up to 500 conditions per place. [2024-06-27 20:20:04,624 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 107 selfloop transitions, 53 changer transitions 0/162 dead transitions. [2024-06-27 20:20:04,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 162 transitions, 1558 flow [2024-06-27 20:20:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:04,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:04,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-27 20:20:04,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-27 20:20:04,625 INFO L175 Difference]: Start difference. First operand has 166 places, 134 transitions, 1092 flow. Second operand 11 states and 139 transitions. [2024-06-27 20:20:04,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 162 transitions, 1558 flow [2024-06-27 20:20:04,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 162 transitions, 1456 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:04,689 INFO L231 Difference]: Finished difference. Result has 170 places, 139 transitions, 1180 flow [2024-06-27 20:20:04,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1180, PETRI_PLACES=170, PETRI_TRANSITIONS=139} [2024-06-27 20:20:04,689 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 140 predicate places. [2024-06-27 20:20:04,689 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 139 transitions, 1180 flow [2024-06-27 20:20:04,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:04,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:04,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:04,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:20:04,690 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:04,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:04,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1862258546, now seen corresponding path program 5 times [2024-06-27 20:20:04,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:04,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769607859] [2024-06-27 20:20:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:04,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:05,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:05,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769607859] [2024-06-27 20:20:05,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769607859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:05,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:05,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:05,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585954366] [2024-06-27 20:20:05,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:05,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:05,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:05,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:05,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:05,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:05,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 139 transitions, 1180 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:05,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:05,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:05,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:05,788 INFO L124 PetriNetUnfolderBase]: 419/740 cut-off events. [2024-06-27 20:20:05,788 INFO L125 PetriNetUnfolderBase]: For 46340/46340 co-relation queries the response was YES. [2024-06-27 20:20:05,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4855 conditions, 740 events. 419/740 cut-off events. For 46340/46340 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3326 event pairs, 57 based on Foata normal form. 1/739 useless extension candidates. Maximal degree in co-relation 4769. Up to 469 conditions per place. [2024-06-27 20:20:05,793 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 98 selfloop transitions, 66 changer transitions 0/166 dead transitions. [2024-06-27 20:20:05,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 166 transitions, 1640 flow [2024-06-27 20:20:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:20:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:20:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-06-27 20:20:05,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-27 20:20:05,794 INFO L175 Difference]: Start difference. First operand has 170 places, 139 transitions, 1180 flow. Second operand 12 states and 152 transitions. [2024-06-27 20:20:05,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 166 transitions, 1640 flow [2024-06-27 20:20:05,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 166 transitions, 1498 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:05,874 INFO L231 Difference]: Finished difference. Result has 174 places, 141 transitions, 1222 flow [2024-06-27 20:20:05,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1222, PETRI_PLACES=174, PETRI_TRANSITIONS=141} [2024-06-27 20:20:05,874 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-06-27 20:20:05,874 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 141 transitions, 1222 flow [2024-06-27 20:20:05,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:05,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:05,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:05,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:20:05,874 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:05,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:05,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1032598716, now seen corresponding path program 6 times [2024-06-27 20:20:05,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:05,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458733342] [2024-06-27 20:20:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:05,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:06,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:06,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458733342] [2024-06-27 20:20:06,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458733342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:06,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:06,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:06,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931183865] [2024-06-27 20:20:06,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:06,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:06,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:06,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:06,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:06,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:06,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 141 transitions, 1222 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:06,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:06,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:06,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:06,915 INFO L124 PetriNetUnfolderBase]: 428/755 cut-off events. [2024-06-27 20:20:06,915 INFO L125 PetriNetUnfolderBase]: For 51918/51918 co-relation queries the response was YES. [2024-06-27 20:20:06,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5037 conditions, 755 events. 428/755 cut-off events. For 51918/51918 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3391 event pairs, 62 based on Foata normal form. 3/756 useless extension candidates. Maximal degree in co-relation 4950. Up to 613 conditions per place. [2024-06-27 20:20:06,921 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 126 selfloop transitions, 35 changer transitions 0/163 dead transitions. [2024-06-27 20:20:06,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 163 transitions, 1692 flow [2024-06-27 20:20:06,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:06,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-27 20:20:06,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-27 20:20:06,922 INFO L175 Difference]: Start difference. First operand has 174 places, 141 transitions, 1222 flow. Second operand 10 states and 123 transitions. [2024-06-27 20:20:06,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 163 transitions, 1692 flow [2024-06-27 20:20:06,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 163 transitions, 1538 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-27 20:20:06,998 INFO L231 Difference]: Finished difference. Result has 174 places, 144 transitions, 1210 flow [2024-06-27 20:20:06,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1210, PETRI_PLACES=174, PETRI_TRANSITIONS=144} [2024-06-27 20:20:06,998 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-06-27 20:20:06,998 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 144 transitions, 1210 flow [2024-06-27 20:20:06,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:06,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:06,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:06,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:20:06,999 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:06,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:06,999 INFO L85 PathProgramCache]: Analyzing trace with hash 693706995, now seen corresponding path program 7 times [2024-06-27 20:20:06,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:06,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129688053] [2024-06-27 20:20:07,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:07,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:07,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:07,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129688053] [2024-06-27 20:20:07,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129688053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:07,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:07,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:07,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265857158] [2024-06-27 20:20:07,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:07,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:07,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:07,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:07,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:07,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:07,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 144 transitions, 1210 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:07,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:07,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:07,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:08,092 INFO L124 PetriNetUnfolderBase]: 432/763 cut-off events. [2024-06-27 20:20:08,092 INFO L125 PetriNetUnfolderBase]: For 51876/51876 co-relation queries the response was YES. [2024-06-27 20:20:08,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5094 conditions, 763 events. 432/763 cut-off events. For 51876/51876 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3443 event pairs, 68 based on Foata normal form. 2/763 useless extension candidates. Maximal degree in co-relation 5006. Up to 719 conditions per place. [2024-06-27 20:20:08,097 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 132 selfloop transitions, 22 changer transitions 0/156 dead transitions. [2024-06-27 20:20:08,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 156 transitions, 1570 flow [2024-06-27 20:20:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-27 20:20:08,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-27 20:20:08,099 INFO L175 Difference]: Start difference. First operand has 174 places, 144 transitions, 1210 flow. Second operand 10 states and 109 transitions. [2024-06-27 20:20:08,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 156 transitions, 1570 flow [2024-06-27 20:20:08,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 156 transitions, 1450 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:08,171 INFO L231 Difference]: Finished difference. Result has 176 places, 145 transitions, 1168 flow [2024-06-27 20:20:08,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1168, PETRI_PLACES=176, PETRI_TRANSITIONS=145} [2024-06-27 20:20:08,172 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 146 predicate places. [2024-06-27 20:20:08,172 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 145 transitions, 1168 flow [2024-06-27 20:20:08,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:08,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:08,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:08,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:20:08,172 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:08,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:08,172 INFO L85 PathProgramCache]: Analyzing trace with hash -574583892, now seen corresponding path program 7 times [2024-06-27 20:20:08,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:08,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229855553] [2024-06-27 20:20:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:08,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:08,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:08,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229855553] [2024-06-27 20:20:08,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229855553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:08,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:08,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:08,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601460518] [2024-06-27 20:20:08,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:08,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:08,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:08,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:08,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:08,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:08,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 145 transitions, 1168 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:08,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:08,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:08,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:09,153 INFO L124 PetriNetUnfolderBase]: 441/778 cut-off events. [2024-06-27 20:20:09,153 INFO L125 PetriNetUnfolderBase]: For 55512/55512 co-relation queries the response was YES. [2024-06-27 20:20:09,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5118 conditions, 778 events. 441/778 cut-off events. For 55512/55512 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3543 event pairs, 64 based on Foata normal form. 3/779 useless extension candidates. Maximal degree in co-relation 5029. Up to 728 conditions per place. [2024-06-27 20:20:09,159 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 144 selfloop transitions, 17 changer transitions 0/163 dead transitions. [2024-06-27 20:20:09,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 163 transitions, 1616 flow [2024-06-27 20:20:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-27 20:20:09,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-27 20:20:09,159 INFO L175 Difference]: Start difference. First operand has 176 places, 145 transitions, 1168 flow. Second operand 10 states and 111 transitions. [2024-06-27 20:20:09,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 163 transitions, 1616 flow [2024-06-27 20:20:09,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 163 transitions, 1548 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:09,236 INFO L231 Difference]: Finished difference. Result has 178 places, 148 transitions, 1212 flow [2024-06-27 20:20:09,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1212, PETRI_PLACES=178, PETRI_TRANSITIONS=148} [2024-06-27 20:20:09,237 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-06-27 20:20:09,237 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 148 transitions, 1212 flow [2024-06-27 20:20:09,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:09,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:09,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:09,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:20:09,237 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:09,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:09,237 INFO L85 PathProgramCache]: Analyzing trace with hash 693914540, now seen corresponding path program 8 times [2024-06-27 20:20:09,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:09,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866842192] [2024-06-27 20:20:09,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:09,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:09,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:09,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866842192] [2024-06-27 20:20:09,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866842192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:09,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:09,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:09,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682742546] [2024-06-27 20:20:09,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:09,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:09,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:09,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:09,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:09,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:09,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 148 transitions, 1212 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:09,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:09,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:09,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:10,229 INFO L124 PetriNetUnfolderBase]: 450/793 cut-off events. [2024-06-27 20:20:10,229 INFO L125 PetriNetUnfolderBase]: For 57800/57800 co-relation queries the response was YES. [2024-06-27 20:20:10,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5322 conditions, 793 events. 450/793 cut-off events. For 57800/57800 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3616 event pairs, 62 based on Foata normal form. 3/794 useless extension candidates. Maximal degree in co-relation 5232. Up to 651 conditions per place. [2024-06-27 20:20:10,234 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 130 selfloop transitions, 36 changer transitions 0/168 dead transitions. [2024-06-27 20:20:10,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 168 transitions, 1700 flow [2024-06-27 20:20:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-27 20:20:10,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-27 20:20:10,236 INFO L175 Difference]: Start difference. First operand has 178 places, 148 transitions, 1212 flow. Second operand 10 states and 120 transitions. [2024-06-27 20:20:10,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 168 transitions, 1700 flow [2024-06-27 20:20:10,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 168 transitions, 1610 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:10,318 INFO L231 Difference]: Finished difference. Result has 180 places, 151 transitions, 1278 flow [2024-06-27 20:20:10,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1278, PETRI_PLACES=180, PETRI_TRANSITIONS=151} [2024-06-27 20:20:10,318 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-06-27 20:20:10,318 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 151 transitions, 1278 flow [2024-06-27 20:20:10,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:10,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:10,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:10,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:20:10,319 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:10,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:10,319 INFO L85 PathProgramCache]: Analyzing trace with hash -831084402, now seen corresponding path program 9 times [2024-06-27 20:20:10,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:10,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618014585] [2024-06-27 20:20:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:10,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:10,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:10,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618014585] [2024-06-27 20:20:10,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618014585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:10,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:10,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:10,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502016771] [2024-06-27 20:20:10,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:10,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:10,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:10,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:11,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:11,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 151 transitions, 1278 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:11,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:11,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:11,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:11,319 INFO L124 PetriNetUnfolderBase]: 459/808 cut-off events. [2024-06-27 20:20:11,319 INFO L125 PetriNetUnfolderBase]: For 59850/59850 co-relation queries the response was YES. [2024-06-27 20:20:11,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5534 conditions, 808 events. 459/808 cut-off events. For 59850/59850 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3714 event pairs, 66 based on Foata normal form. 3/809 useless extension candidates. Maximal degree in co-relation 5443. Up to 721 conditions per place. [2024-06-27 20:20:11,325 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 145 selfloop transitions, 24 changer transitions 0/171 dead transitions. [2024-06-27 20:20:11,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 171 transitions, 1784 flow [2024-06-27 20:20:11,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:11,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-27 20:20:11,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-27 20:20:11,326 INFO L175 Difference]: Start difference. First operand has 180 places, 151 transitions, 1278 flow. Second operand 10 states and 117 transitions. [2024-06-27 20:20:11,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 171 transitions, 1784 flow [2024-06-27 20:20:11,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 171 transitions, 1650 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:11,418 INFO L231 Difference]: Finished difference. Result has 182 places, 154 transitions, 1282 flow [2024-06-27 20:20:11,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1282, PETRI_PLACES=182, PETRI_TRANSITIONS=154} [2024-06-27 20:20:11,418 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2024-06-27 20:20:11,418 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 154 transitions, 1282 flow [2024-06-27 20:20:11,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:11,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:11,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:11,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:20:11,418 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:11,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:11,419 INFO L85 PathProgramCache]: Analyzing trace with hash -565379465, now seen corresponding path program 1 times [2024-06-27 20:20:11,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:11,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802703502] [2024-06-27 20:20:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:11,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:12,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:12,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802703502] [2024-06-27 20:20:12,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802703502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:12,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:12,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:12,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388164930] [2024-06-27 20:20:12,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:12,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:12,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:12,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:12,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:12,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:12,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 154 transitions, 1282 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:12,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:12,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:12,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:12,449 INFO L124 PetriNetUnfolderBase]: 455/802 cut-off events. [2024-06-27 20:20:12,449 INFO L125 PetriNetUnfolderBase]: For 54421/54421 co-relation queries the response was YES. [2024-06-27 20:20:12,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5306 conditions, 802 events. 455/802 cut-off events. For 54421/54421 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3662 event pairs, 69 based on Foata normal form. 2/802 useless extension candidates. Maximal degree in co-relation 5214. Up to 763 conditions per place. [2024-06-27 20:20:12,454 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 151 selfloop transitions, 16 changer transitions 0/169 dead transitions. [2024-06-27 20:20:12,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 169 transitions, 1684 flow [2024-06-27 20:20:12,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:12,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-27 20:20:12,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-27 20:20:12,455 INFO L175 Difference]: Start difference. First operand has 182 places, 154 transitions, 1282 flow. Second operand 10 states and 108 transitions. [2024-06-27 20:20:12,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 169 transitions, 1684 flow [2024-06-27 20:20:12,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 169 transitions, 1568 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:12,544 INFO L231 Difference]: Finished difference. Result has 184 places, 156 transitions, 1247 flow [2024-06-27 20:20:12,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1166, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1247, PETRI_PLACES=184, PETRI_TRANSITIONS=156} [2024-06-27 20:20:12,544 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2024-06-27 20:20:12,544 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 156 transitions, 1247 flow [2024-06-27 20:20:12,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:12,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:12,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:12,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:20:12,545 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:12,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:12,545 INFO L85 PathProgramCache]: Analyzing trace with hash 693707150, now seen corresponding path program 10 times [2024-06-27 20:20:12,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:12,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729938749] [2024-06-27 20:20:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:12,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:13,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:13,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729938749] [2024-06-27 20:20:13,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729938749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:13,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:13,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:13,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292792814] [2024-06-27 20:20:13,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:13,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:13,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:13,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:13,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:13,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:13,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 156 transitions, 1247 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:13,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:13,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:13,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:13,747 INFO L124 PetriNetUnfolderBase]: 458/807 cut-off events. [2024-06-27 20:20:13,748 INFO L125 PetriNetUnfolderBase]: For 53088/53088 co-relation queries the response was YES. [2024-06-27 20:20:13,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5253 conditions, 807 events. 458/807 cut-off events. For 53088/53088 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3725 event pairs, 61 based on Foata normal form. 1/806 useless extension candidates. Maximal degree in co-relation 5160. Up to 648 conditions per place. [2024-06-27 20:20:13,754 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 135 selfloop transitions, 42 changer transitions 0/179 dead transitions. [2024-06-27 20:20:13,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 179 transitions, 1783 flow [2024-06-27 20:20:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:13,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-27 20:20:13,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-27 20:20:13,755 INFO L175 Difference]: Start difference. First operand has 184 places, 156 transitions, 1247 flow. Second operand 11 states and 135 transitions. [2024-06-27 20:20:13,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 179 transitions, 1783 flow [2024-06-27 20:20:13,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 179 transitions, 1718 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:13,845 INFO L231 Difference]: Finished difference. Result has 187 places, 158 transitions, 1337 flow [2024-06-27 20:20:13,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1337, PETRI_PLACES=187, PETRI_TRANSITIONS=158} [2024-06-27 20:20:13,846 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 157 predicate places. [2024-06-27 20:20:13,846 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 158 transitions, 1337 flow [2024-06-27 20:20:13,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:13,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:13,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:13,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:20:13,846 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:13,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:13,846 INFO L85 PathProgramCache]: Analyzing trace with hash -831291947, now seen corresponding path program 8 times [2024-06-27 20:20:13,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:13,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106455334] [2024-06-27 20:20:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:13,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:14,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:14,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106455334] [2024-06-27 20:20:14,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106455334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:14,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:14,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:14,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172186323] [2024-06-27 20:20:14,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:14,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:14,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:14,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:14,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:14,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:14,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 158 transitions, 1337 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:14,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:14,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:14,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:14,960 INFO L124 PetriNetUnfolderBase]: 462/815 cut-off events. [2024-06-27 20:20:14,960 INFO L125 PetriNetUnfolderBase]: For 57624/57624 co-relation queries the response was YES. [2024-06-27 20:20:14,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5451 conditions, 815 events. 462/815 cut-off events. For 57624/57624 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3765 event pairs, 73 based on Foata normal form. 2/815 useless extension candidates. Maximal degree in co-relation 5357. Up to 786 conditions per place. [2024-06-27 20:20:14,967 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 153 selfloop transitions, 15 changer transitions 0/170 dead transitions. [2024-06-27 20:20:14,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 170 transitions, 1727 flow [2024-06-27 20:20:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:14,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-27 20:20:14,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-27 20:20:14,969 INFO L175 Difference]: Start difference. First operand has 187 places, 158 transitions, 1337 flow. Second operand 10 states and 105 transitions. [2024-06-27 20:20:14,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 170 transitions, 1727 flow [2024-06-27 20:20:15,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 170 transitions, 1600 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-27 20:20:15,066 INFO L231 Difference]: Finished difference. Result has 188 places, 159 transitions, 1276 flow [2024-06-27 20:20:15,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1276, PETRI_PLACES=188, PETRI_TRANSITIONS=159} [2024-06-27 20:20:15,067 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2024-06-27 20:20:15,067 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 159 transitions, 1276 flow [2024-06-27 20:20:15,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:15,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:15,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:15,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:20:15,067 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:15,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:15,067 INFO L85 PathProgramCache]: Analyzing trace with hash -831286212, now seen corresponding path program 11 times [2024-06-27 20:20:15,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:15,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675643691] [2024-06-27 20:20:15,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:15,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:15,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:15,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675643691] [2024-06-27 20:20:15,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675643691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:15,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:15,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:15,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521565853] [2024-06-27 20:20:15,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:15,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:15,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:15,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:15,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:15,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:15,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 159 transitions, 1276 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:15,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:15,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:15,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:16,089 INFO L124 PetriNetUnfolderBase]: 471/830 cut-off events. [2024-06-27 20:20:16,090 INFO L125 PetriNetUnfolderBase]: For 62289/62289 co-relation queries the response was YES. [2024-06-27 20:20:16,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5539 conditions, 830 events. 471/830 cut-off events. For 62289/62289 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3871 event pairs, 61 based on Foata normal form. 3/831 useless extension candidates. Maximal degree in co-relation 5444. Up to 743 conditions per place. [2024-06-27 20:20:16,095 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 152 selfloop transitions, 25 changer transitions 0/179 dead transitions. [2024-06-27 20:20:16,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 179 transitions, 1822 flow [2024-06-27 20:20:16,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-27 20:20:16,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-27 20:20:16,096 INFO L175 Difference]: Start difference. First operand has 188 places, 159 transitions, 1276 flow. Second operand 10 states and 116 transitions. [2024-06-27 20:20:16,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 179 transitions, 1822 flow [2024-06-27 20:20:16,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 179 transitions, 1766 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:16,192 INFO L231 Difference]: Finished difference. Result has 190 places, 162 transitions, 1372 flow [2024-06-27 20:20:16,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1372, PETRI_PLACES=190, PETRI_TRANSITIONS=162} [2024-06-27 20:20:16,192 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 160 predicate places. [2024-06-27 20:20:16,193 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 162 transitions, 1372 flow [2024-06-27 20:20:16,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:16,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:16,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:16,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:20:16,193 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:16,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash -831291792, now seen corresponding path program 12 times [2024-06-27 20:20:16,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:16,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201390743] [2024-06-27 20:20:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:16,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:16,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:16,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201390743] [2024-06-27 20:20:16,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201390743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:16,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:16,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:16,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641462835] [2024-06-27 20:20:16,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:16,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:16,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:16,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:16,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:16,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:16,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 162 transitions, 1372 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:16,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:16,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:16,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:17,310 INFO L124 PetriNetUnfolderBase]: 474/835 cut-off events. [2024-06-27 20:20:17,310 INFO L125 PetriNetUnfolderBase]: For 59389/59389 co-relation queries the response was YES. [2024-06-27 20:20:17,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5692 conditions, 835 events. 474/835 cut-off events. For 59389/59389 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3898 event pairs, 61 based on Foata normal form. 1/834 useless extension candidates. Maximal degree in co-relation 5596. Up to 720 conditions per place. [2024-06-27 20:20:17,316 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 146 selfloop transitions, 35 changer transitions 0/183 dead transitions. [2024-06-27 20:20:17,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 183 transitions, 1912 flow [2024-06-27 20:20:17,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-27 20:20:17,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-27 20:20:17,317 INFO L175 Difference]: Start difference. First operand has 190 places, 162 transitions, 1372 flow. Second operand 11 states and 128 transitions. [2024-06-27 20:20:17,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 183 transitions, 1912 flow [2024-06-27 20:20:17,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 183 transitions, 1782 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:17,417 INFO L231 Difference]: Finished difference. Result has 193 places, 164 transitions, 1391 flow [2024-06-27 20:20:17,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1391, PETRI_PLACES=193, PETRI_TRANSITIONS=164} [2024-06-27 20:20:17,417 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 163 predicate places. [2024-06-27 20:20:17,418 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 164 transitions, 1391 flow [2024-06-27 20:20:17,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:17,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:17,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:17,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:20:17,418 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:17,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:17,418 INFO L85 PathProgramCache]: Analyzing trace with hash 688200620, now seen corresponding path program 13 times [2024-06-27 20:20:17,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:17,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503725183] [2024-06-27 20:20:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:17,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:18,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:18,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503725183] [2024-06-27 20:20:18,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503725183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:18,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:18,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:18,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019699022] [2024-06-27 20:20:18,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:18,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:18,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:18,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:18,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:18,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:18,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 164 transitions, 1391 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:18,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:18,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:18,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:18,494 INFO L124 PetriNetUnfolderBase]: 478/842 cut-off events. [2024-06-27 20:20:18,494 INFO L125 PetriNetUnfolderBase]: For 63737/63737 co-relation queries the response was YES. [2024-06-27 20:20:18,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5675 conditions, 842 events. 478/842 cut-off events. For 63737/63737 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3954 event pairs, 53 based on Foata normal form. 3/843 useless extension candidates. Maximal degree in co-relation 5578. Up to 623 conditions per place. [2024-06-27 20:20:18,499 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 122 selfloop transitions, 63 changer transitions 0/187 dead transitions. [2024-06-27 20:20:18,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 187 transitions, 1981 flow [2024-06-27 20:20:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:20:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:20:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-27 20:20:18,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-27 20:20:18,500 INFO L175 Difference]: Start difference. First operand has 193 places, 164 transitions, 1391 flow. Second operand 12 states and 141 transitions. [2024-06-27 20:20:18,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 187 transitions, 1981 flow [2024-06-27 20:20:18,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 187 transitions, 1860 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-27 20:20:18,602 INFO L231 Difference]: Finished difference. Result has 196 places, 167 transitions, 1509 flow [2024-06-27 20:20:18,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1509, PETRI_PLACES=196, PETRI_TRANSITIONS=167} [2024-06-27 20:20:18,602 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 166 predicate places. [2024-06-27 20:20:18,602 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 167 transitions, 1509 flow [2024-06-27 20:20:18,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:18,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:18,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:18,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:20:18,603 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:18,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:18,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1177226509, now seen corresponding path program 9 times [2024-06-27 20:20:18,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:18,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561075938] [2024-06-27 20:20:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:18,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:19,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:19,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561075938] [2024-06-27 20:20:19,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561075938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:19,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:19,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:19,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419808497] [2024-06-27 20:20:19,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:19,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:19,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:19,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:19,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:19,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:19,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 167 transitions, 1509 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:19,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:19,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:19,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:19,701 INFO L124 PetriNetUnfolderBase]: 482/850 cut-off events. [2024-06-27 20:20:19,701 INFO L125 PetriNetUnfolderBase]: For 63111/63111 co-relation queries the response was YES. [2024-06-27 20:20:19,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5871 conditions, 850 events. 482/850 cut-off events. For 63111/63111 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 3972 event pairs, 79 based on Foata normal form. 2/850 useless extension candidates. Maximal degree in co-relation 5773. Up to 795 conditions per place. [2024-06-27 20:20:19,707 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 149 selfloop transitions, 29 changer transitions 0/180 dead transitions. [2024-06-27 20:20:19,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 180 transitions, 1923 flow [2024-06-27 20:20:19,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:19,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:19,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-27 20:20:19,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-27 20:20:19,708 INFO L175 Difference]: Start difference. First operand has 196 places, 167 transitions, 1509 flow. Second operand 11 states and 118 transitions. [2024-06-27 20:20:19,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 180 transitions, 1923 flow [2024-06-27 20:20:19,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 180 transitions, 1708 flow, removed 47 selfloop flow, removed 10 redundant places. [2024-06-27 20:20:19,818 INFO L231 Difference]: Finished difference. Result has 197 places, 168 transitions, 1390 flow [2024-06-27 20:20:19,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1390, PETRI_PLACES=197, PETRI_TRANSITIONS=168} [2024-06-27 20:20:19,819 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-27 20:20:19,819 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 168 transitions, 1390 flow [2024-06-27 20:20:19,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:19,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:19,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:19,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:20:19,819 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:19,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:19,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1177230229, now seen corresponding path program 10 times [2024-06-27 20:20:19,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:19,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637211826] [2024-06-27 20:20:19,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:19,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:20,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:20,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637211826] [2024-06-27 20:20:20,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637211826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:20,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:20,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:20,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397951066] [2024-06-27 20:20:20,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:20,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:20,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:20,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:20,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:20,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:20,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 168 transitions, 1390 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:20,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:20,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:20,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:20,871 INFO L124 PetriNetUnfolderBase]: 479/845 cut-off events. [2024-06-27 20:20:20,871 INFO L125 PetriNetUnfolderBase]: For 57779/57779 co-relation queries the response was YES. [2024-06-27 20:20:20,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5420 conditions, 845 events. 479/845 cut-off events. For 57779/57779 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 3961 event pairs, 76 based on Foata normal form. 2/845 useless extension candidates. Maximal degree in co-relation 5321. Up to 764 conditions per place. [2024-06-27 20:20:20,876 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 147 selfloop transitions, 31 changer transitions 0/180 dead transitions. [2024-06-27 20:20:20,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 180 transitions, 1772 flow [2024-06-27 20:20:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:20,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-27 20:20:20,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:20:20,879 INFO L175 Difference]: Start difference. First operand has 197 places, 168 transitions, 1390 flow. Second operand 10 states and 110 transitions. [2024-06-27 20:20:20,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 180 transitions, 1772 flow [2024-06-27 20:20:21,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 180 transitions, 1686 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 20:20:21,008 INFO L231 Difference]: Finished difference. Result has 198 places, 168 transitions, 1370 flow [2024-06-27 20:20:21,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1370, PETRI_PLACES=198, PETRI_TRANSITIONS=168} [2024-06-27 20:20:21,009 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 168 predicate places. [2024-06-27 20:20:21,009 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 168 transitions, 1370 flow [2024-06-27 20:20:21,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:21,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:21,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:21,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:20:21,010 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:21,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:21,010 INFO L85 PathProgramCache]: Analyzing trace with hash 23948350, now seen corresponding path program 1 times [2024-06-27 20:20:21,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:21,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159325864] [2024-06-27 20:20:21,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:21,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:21,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:21,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159325864] [2024-06-27 20:20:21,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159325864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:21,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:21,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:21,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403594414] [2024-06-27 20:20:21,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:21,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:21,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:21,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:21,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:21,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:21,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 168 transitions, 1370 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:21,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:21,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:21,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:22,227 INFO L124 PetriNetUnfolderBase]: 490/866 cut-off events. [2024-06-27 20:20:22,227 INFO L125 PetriNetUnfolderBase]: For 65254/65254 co-relation queries the response was YES. [2024-06-27 20:20:22,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5729 conditions, 866 events. 490/866 cut-off events. For 65254/65254 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4112 event pairs, 59 based on Foata normal form. 2/866 useless extension candidates. Maximal degree in co-relation 5629. Up to 723 conditions per place. [2024-06-27 20:20:22,234 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 174 selfloop transitions, 23 changer transitions 0/199 dead transitions. [2024-06-27 20:20:22,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 199 transitions, 2076 flow [2024-06-27 20:20:22,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:20:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:20:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-27 20:20:22,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-27 20:20:22,236 INFO L175 Difference]: Start difference. First operand has 198 places, 168 transitions, 1370 flow. Second operand 12 states and 140 transitions. [2024-06-27 20:20:22,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 199 transitions, 2076 flow [2024-06-27 20:20:22,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 199 transitions, 1935 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 20:20:22,352 INFO L231 Difference]: Finished difference. Result has 202 places, 173 transitions, 1402 flow [2024-06-27 20:20:22,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1402, PETRI_PLACES=202, PETRI_TRANSITIONS=173} [2024-06-27 20:20:22,352 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2024-06-27 20:20:22,352 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 173 transitions, 1402 flow [2024-06-27 20:20:22,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:22,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:22,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:22,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:20:22,353 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:22,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:22,353 INFO L85 PathProgramCache]: Analyzing trace with hash 82160956, now seen corresponding path program 1 times [2024-06-27 20:20:22,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:22,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515321332] [2024-06-27 20:20:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:22,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:23,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:23,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515321332] [2024-06-27 20:20:23,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515321332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:23,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:23,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:23,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13964086] [2024-06-27 20:20:23,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:23,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:23,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:23,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:23,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:23,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:23,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 173 transitions, 1402 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:23,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:23,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:23,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:23,768 INFO L124 PetriNetUnfolderBase]: 496/876 cut-off events. [2024-06-27 20:20:23,768 INFO L125 PetriNetUnfolderBase]: For 67527/67527 co-relation queries the response was YES. [2024-06-27 20:20:23,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5831 conditions, 876 events. 496/876 cut-off events. For 67527/67527 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4170 event pairs, 76 based on Foata normal form. 2/876 useless extension candidates. Maximal degree in co-relation 5729. Up to 794 conditions per place. [2024-06-27 20:20:23,775 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 170 selfloop transitions, 30 changer transitions 0/202 dead transitions. [2024-06-27 20:20:23,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 202 transitions, 1940 flow [2024-06-27 20:20:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 20:20:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 20:20:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 163 transitions. [2024-06-27 20:20:23,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35053763440860214 [2024-06-27 20:20:23,776 INFO L175 Difference]: Start difference. First operand has 202 places, 173 transitions, 1402 flow. Second operand 15 states and 163 transitions. [2024-06-27 20:20:23,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 202 transitions, 1940 flow [2024-06-27 20:20:23,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 202 transitions, 1829 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:23,916 INFO L231 Difference]: Finished difference. Result has 209 places, 175 transitions, 1436 flow [2024-06-27 20:20:23,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1436, PETRI_PLACES=209, PETRI_TRANSITIONS=175} [2024-06-27 20:20:23,916 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-27 20:20:23,916 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 175 transitions, 1436 flow [2024-06-27 20:20:23,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:23,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:23,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:23,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:20:23,917 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:23,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:23,917 INFO L85 PathProgramCache]: Analyzing trace with hash 82040800, now seen corresponding path program 2 times [2024-06-27 20:20:23,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:23,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552801516] [2024-06-27 20:20:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:23,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:24,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:24,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552801516] [2024-06-27 20:20:24,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552801516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:24,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:24,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:24,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802726695] [2024-06-27 20:20:24,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:24,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:24,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:24,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:24,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:24,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:24,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 175 transitions, 1436 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:24,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:24,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:24,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:25,144 INFO L124 PetriNetUnfolderBase]: 525/931 cut-off events. [2024-06-27 20:20:25,145 INFO L125 PetriNetUnfolderBase]: For 76638/76638 co-relation queries the response was YES. [2024-06-27 20:20:25,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6198 conditions, 931 events. 525/931 cut-off events. For 76638/76638 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4575 event pairs, 81 based on Foata normal form. 2/931 useless extension candidates. Maximal degree in co-relation 6096. Up to 824 conditions per place. [2024-06-27 20:20:25,152 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 181 selfloop transitions, 26 changer transitions 0/209 dead transitions. [2024-06-27 20:20:25,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 209 transitions, 2165 flow [2024-06-27 20:20:25,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:20:25,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:20:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-27 20:20:25,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-27 20:20:25,153 INFO L175 Difference]: Start difference. First operand has 209 places, 175 transitions, 1436 flow. Second operand 12 states and 142 transitions. [2024-06-27 20:20:25,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 209 transitions, 2165 flow [2024-06-27 20:20:25,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 209 transitions, 2019 flow, removed 37 selfloop flow, removed 14 redundant places. [2024-06-27 20:20:25,302 INFO L231 Difference]: Finished difference. Result has 209 places, 182 transitions, 1454 flow [2024-06-27 20:20:25,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1454, PETRI_PLACES=209, PETRI_TRANSITIONS=182} [2024-06-27 20:20:25,303 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-27 20:20:25,303 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 182 transitions, 1454 flow [2024-06-27 20:20:25,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:25,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:25,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:25,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:20:25,303 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:25,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:25,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2005671916, now seen corresponding path program 3 times [2024-06-27 20:20:25,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:25,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113799606] [2024-06-27 20:20:25,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:25,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:26,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:26,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113799606] [2024-06-27 20:20:26,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113799606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:26,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:26,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:26,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882460396] [2024-06-27 20:20:26,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:26,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:26,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:26,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:26,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:26,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:26,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 182 transitions, 1454 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:26,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:26,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:26,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:26,513 INFO L124 PetriNetUnfolderBase]: 529/939 cut-off events. [2024-06-27 20:20:26,513 INFO L125 PetriNetUnfolderBase]: For 79033/79033 co-relation queries the response was YES. [2024-06-27 20:20:26,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6196 conditions, 939 events. 529/939 cut-off events. For 79033/79033 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4608 event pairs, 83 based on Foata normal form. 2/939 useless extension candidates. Maximal degree in co-relation 6092. Up to 850 conditions per place. [2024-06-27 20:20:26,521 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 181 selfloop transitions, 26 changer transitions 0/209 dead transitions. [2024-06-27 20:20:26,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 209 transitions, 2119 flow [2024-06-27 20:20:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:20:26,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:20:26,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-27 20:20:26,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-27 20:20:26,522 INFO L175 Difference]: Start difference. First operand has 209 places, 182 transitions, 1454 flow. Second operand 12 states and 140 transitions. [2024-06-27 20:20:26,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 209 transitions, 2119 flow [2024-06-27 20:20:26,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 209 transitions, 2066 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:26,657 INFO L231 Difference]: Finished difference. Result has 216 places, 184 transitions, 1497 flow [2024-06-27 20:20:26,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1497, PETRI_PLACES=216, PETRI_TRANSITIONS=184} [2024-06-27 20:20:26,658 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2024-06-27 20:20:26,658 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 184 transitions, 1497 flow [2024-06-27 20:20:26,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:26,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:26,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:26,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:20:26,659 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:26,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:26,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1173724776, now seen corresponding path program 4 times [2024-06-27 20:20:26,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:26,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588740453] [2024-06-27 20:20:26,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:26,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:27,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:27,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588740453] [2024-06-27 20:20:27,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588740453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:27,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:27,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:27,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908499171] [2024-06-27 20:20:27,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:27,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:27,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:27,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:27,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:27,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:27,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 184 transitions, 1497 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:27,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:27,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:27,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:27,902 INFO L124 PetriNetUnfolderBase]: 526/934 cut-off events. [2024-06-27 20:20:27,902 INFO L125 PetriNetUnfolderBase]: For 74451/74451 co-relation queries the response was YES. [2024-06-27 20:20:27,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6034 conditions, 934 events. 526/934 cut-off events. For 74451/74451 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4571 event pairs, 84 based on Foata normal form. 2/934 useless extension candidates. Maximal degree in co-relation 5927. Up to 862 conditions per place. [2024-06-27 20:20:27,910 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 180 selfloop transitions, 25 changer transitions 0/207 dead transitions. [2024-06-27 20:20:27,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 207 transitions, 1964 flow [2024-06-27 20:20:27,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:20:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:20:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-27 20:20:27,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-27 20:20:27,911 INFO L175 Difference]: Start difference. First operand has 216 places, 184 transitions, 1497 flow. Second operand 12 states and 137 transitions. [2024-06-27 20:20:27,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 207 transitions, 1964 flow [2024-06-27 20:20:28,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 207 transitions, 1869 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-27 20:20:28,063 INFO L231 Difference]: Finished difference. Result has 220 places, 185 transitions, 1466 flow [2024-06-27 20:20:28,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1466, PETRI_PLACES=220, PETRI_TRANSITIONS=185} [2024-06-27 20:20:28,064 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 190 predicate places. [2024-06-27 20:20:28,064 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 185 transitions, 1466 flow [2024-06-27 20:20:28,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:28,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:28,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:28,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:20:28,064 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:28,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:28,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1525480386, now seen corresponding path program 5 times [2024-06-27 20:20:28,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:28,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792268070] [2024-06-27 20:20:28,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:28,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:28,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:28,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792268070] [2024-06-27 20:20:28,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792268070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:28,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:28,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:28,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227448942] [2024-06-27 20:20:28,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:28,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:28,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:28,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:28,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:28,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:28,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 185 transitions, 1466 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:28,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:28,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:28,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:29,238 INFO L124 PetriNetUnfolderBase]: 530/942 cut-off events. [2024-06-27 20:20:29,238 INFO L125 PetriNetUnfolderBase]: For 75797/75797 co-relation queries the response was YES. [2024-06-27 20:20:29,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6044 conditions, 942 events. 530/942 cut-off events. For 75797/75797 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4642 event pairs, 80 based on Foata normal form. 2/942 useless extension candidates. Maximal degree in co-relation 5935. Up to 853 conditions per place. [2024-06-27 20:20:29,245 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 185 selfloop transitions, 20 changer transitions 0/207 dead transitions. [2024-06-27 20:20:29,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 207 transitions, 2114 flow [2024-06-27 20:20:29,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:29,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-27 20:20:29,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-27 20:20:29,246 INFO L175 Difference]: Start difference. First operand has 220 places, 185 transitions, 1466 flow. Second operand 11 states and 127 transitions. [2024-06-27 20:20:29,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 207 transitions, 2114 flow [2024-06-27 20:20:29,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 207 transitions, 2068 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 20:20:29,388 INFO L231 Difference]: Finished difference. Result has 222 places, 186 transitions, 1494 flow [2024-06-27 20:20:29,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1494, PETRI_PLACES=222, PETRI_TRANSITIONS=186} [2024-06-27 20:20:29,388 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 192 predicate places. [2024-06-27 20:20:29,388 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 186 transitions, 1494 flow [2024-06-27 20:20:29,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:29,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:29,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:29,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:20:29,389 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:29,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:29,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1525360416, now seen corresponding path program 6 times [2024-06-27 20:20:29,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:29,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963292522] [2024-06-27 20:20:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:29,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:30,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:30,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963292522] [2024-06-27 20:20:30,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963292522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:30,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:30,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:30,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343497246] [2024-06-27 20:20:30,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:30,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:30,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:30,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:30,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:30,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:30,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 186 transitions, 1494 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:30,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:30,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:30,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:30,622 INFO L124 PetriNetUnfolderBase]: 540/960 cut-off events. [2024-06-27 20:20:30,623 INFO L125 PetriNetUnfolderBase]: For 78013/78013 co-relation queries the response was YES. [2024-06-27 20:20:30,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6204 conditions, 960 events. 540/960 cut-off events. For 78013/78013 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 4754 event pairs, 86 based on Foata normal form. 2/960 useless extension candidates. Maximal degree in co-relation 6094. Up to 902 conditions per place. [2024-06-27 20:20:30,630 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 185 selfloop transitions, 22 changer transitions 0/209 dead transitions. [2024-06-27 20:20:30,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 209 transitions, 2023 flow [2024-06-27 20:20:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-27 20:20:30,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-27 20:20:30,631 INFO L175 Difference]: Start difference. First operand has 222 places, 186 transitions, 1494 flow. Second operand 11 states and 124 transitions. [2024-06-27 20:20:30,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 209 transitions, 2023 flow [2024-06-27 20:20:30,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 209 transitions, 1906 flow, removed 17 selfloop flow, removed 12 redundant places. [2024-06-27 20:20:30,776 INFO L231 Difference]: Finished difference. Result has 222 places, 191 transitions, 1505 flow [2024-06-27 20:20:30,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1505, PETRI_PLACES=222, PETRI_TRANSITIONS=191} [2024-06-27 20:20:30,777 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 192 predicate places. [2024-06-27 20:20:30,777 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 191 transitions, 1505 flow [2024-06-27 20:20:30,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:30,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:30,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:30,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:20:30,777 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:30,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:30,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1392609754, now seen corresponding path program 7 times [2024-06-27 20:20:30,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:30,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532433879] [2024-06-27 20:20:30,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:30,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:31,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:31,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532433879] [2024-06-27 20:20:31,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532433879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:31,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:31,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:31,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806792539] [2024-06-27 20:20:31,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:31,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:31,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:31,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:31,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:31,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:31,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 191 transitions, 1505 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:31,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:31,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:31,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:32,013 INFO L124 PetriNetUnfolderBase]: 555/989 cut-off events. [2024-06-27 20:20:32,014 INFO L125 PetriNetUnfolderBase]: For 86639/86639 co-relation queries the response was YES. [2024-06-27 20:20:32,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6454 conditions, 989 events. 555/989 cut-off events. For 86639/86639 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 4964 event pairs, 87 based on Foata normal form. 2/989 useless extension candidates. Maximal degree in co-relation 6345. Up to 923 conditions per place. [2024-06-27 20:20:32,021 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 193 selfloop transitions, 19 changer transitions 0/214 dead transitions. [2024-06-27 20:20:32,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 214 transitions, 2204 flow [2024-06-27 20:20:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-27 20:20:32,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-27 20:20:32,022 INFO L175 Difference]: Start difference. First operand has 222 places, 191 transitions, 1505 flow. Second operand 11 states and 124 transitions. [2024-06-27 20:20:32,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 214 transitions, 2204 flow [2024-06-27 20:20:32,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 214 transitions, 2140 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:32,183 INFO L231 Difference]: Finished difference. Result has 227 places, 194 transitions, 1556 flow [2024-06-27 20:20:32,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1441, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1556, PETRI_PLACES=227, PETRI_TRANSITIONS=194} [2024-06-27 20:20:32,184 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 197 predicate places. [2024-06-27 20:20:32,184 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 194 transitions, 1556 flow [2024-06-27 20:20:32,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:32,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:32,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:32,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:20:32,184 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:32,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:32,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1525365066, now seen corresponding path program 8 times [2024-06-27 20:20:32,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:32,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24551074] [2024-06-27 20:20:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:32,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:32,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:32,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24551074] [2024-06-27 20:20:32,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24551074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:32,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:32,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:32,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675175412] [2024-06-27 20:20:32,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:32,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:32,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:32,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:32,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:33,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:33,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 194 transitions, 1556 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:33,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:33,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:33,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:33,380 INFO L124 PetriNetUnfolderBase]: 552/984 cut-off events. [2024-06-27 20:20:33,380 INFO L125 PetriNetUnfolderBase]: For 81531/81531 co-relation queries the response was YES. [2024-06-27 20:20:33,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6252 conditions, 984 events. 552/984 cut-off events. For 81531/81531 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 4946 event pairs, 86 based on Foata normal form. 2/984 useless extension candidates. Maximal degree in co-relation 6141. Up to 912 conditions per place. [2024-06-27 20:20:33,388 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 188 selfloop transitions, 23 changer transitions 0/213 dead transitions. [2024-06-27 20:20:33,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 213 transitions, 2022 flow [2024-06-27 20:20:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-27 20:20:33,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-27 20:20:33,389 INFO L175 Difference]: Start difference. First operand has 227 places, 194 transitions, 1556 flow. Second operand 11 states and 126 transitions. [2024-06-27 20:20:33,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 213 transitions, 2022 flow [2024-06-27 20:20:33,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 213 transitions, 1968 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:33,546 INFO L231 Difference]: Finished difference. Result has 231 places, 194 transitions, 1552 flow [2024-06-27 20:20:33,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1552, PETRI_PLACES=231, PETRI_TRANSITIONS=194} [2024-06-27 20:20:33,546 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 201 predicate places. [2024-06-27 20:20:33,546 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 194 transitions, 1552 flow [2024-06-27 20:20:33,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:33,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:33,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:33,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:20:33,547 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:33,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:33,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1392432124, now seen corresponding path program 9 times [2024-06-27 20:20:33,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:33,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613947005] [2024-06-27 20:20:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:33,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:34,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:34,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613947005] [2024-06-27 20:20:34,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613947005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:34,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:34,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:34,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233823262] [2024-06-27 20:20:34,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:34,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:34,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:34,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:34,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:34,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:34,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 194 transitions, 1552 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:34,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:34,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:34,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:34,953 INFO L124 PetriNetUnfolderBase]: 579/1041 cut-off events. [2024-06-27 20:20:34,953 INFO L125 PetriNetUnfolderBase]: For 125533/125533 co-relation queries the response was YES. [2024-06-27 20:20:34,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6635 conditions, 1041 events. 579/1041 cut-off events. For 125533/125533 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5293 event pairs, 90 based on Foata normal form. 14/1053 useless extension candidates. Maximal degree in co-relation 6522. Up to 931 conditions per place. [2024-06-27 20:20:34,961 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 192 selfloop transitions, 16 changer transitions 12/222 dead transitions. [2024-06-27 20:20:34,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 222 transitions, 2192 flow [2024-06-27 20:20:34,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:34,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-27 20:20:34,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-27 20:20:34,962 INFO L175 Difference]: Start difference. First operand has 231 places, 194 transitions, 1552 flow. Second operand 11 states and 129 transitions. [2024-06-27 20:20:34,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 222 transitions, 2192 flow [2024-06-27 20:20:35,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 222 transitions, 2095 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-27 20:20:35,147 INFO L231 Difference]: Finished difference. Result has 232 places, 192 transitions, 1527 flow [2024-06-27 20:20:35,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1527, PETRI_PLACES=232, PETRI_TRANSITIONS=192} [2024-06-27 20:20:35,147 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 202 predicate places. [2024-06-27 20:20:35,147 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 192 transitions, 1527 flow [2024-06-27 20:20:35,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:35,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:35,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:35,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:20:35,148 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:35,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:35,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1633470060, now seen corresponding path program 10 times [2024-06-27 20:20:35,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:35,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357056620] [2024-06-27 20:20:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:35,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:35,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:35,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357056620] [2024-06-27 20:20:35,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357056620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:35,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:35,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:35,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605575472] [2024-06-27 20:20:35,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:35,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:35,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:35,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:35,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:36,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:36,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 192 transitions, 1527 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:36,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:36,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:36,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:36,467 INFO L124 PetriNetUnfolderBase]: 542/970 cut-off events. [2024-06-27 20:20:36,467 INFO L125 PetriNetUnfolderBase]: For 77733/77733 co-relation queries the response was YES. [2024-06-27 20:20:36,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5987 conditions, 970 events. 542/970 cut-off events. For 77733/77733 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4861 event pairs, 85 based on Foata normal form. 2/970 useless extension candidates. Maximal degree in co-relation 5875. Up to 914 conditions per place. [2024-06-27 20:20:36,475 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 188 selfloop transitions, 21 changer transitions 0/211 dead transitions. [2024-06-27 20:20:36,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 211 transitions, 1989 flow [2024-06-27 20:20:36,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:20:36,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:20:36,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-27 20:20:36,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-27 20:20:36,476 INFO L175 Difference]: Start difference. First operand has 232 places, 192 transitions, 1527 flow. Second operand 12 states and 128 transitions. [2024-06-27 20:20:36,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 211 transitions, 1989 flow [2024-06-27 20:20:36,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 211 transitions, 1892 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-27 20:20:36,644 INFO L231 Difference]: Finished difference. Result has 234 places, 192 transitions, 1478 flow [2024-06-27 20:20:36,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1478, PETRI_PLACES=234, PETRI_TRANSITIONS=192} [2024-06-27 20:20:36,645 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 204 predicate places. [2024-06-27 20:20:36,645 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 192 transitions, 1478 flow [2024-06-27 20:20:36,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:36,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:36,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:36,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:20:36,645 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:36,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:36,646 INFO L85 PathProgramCache]: Analyzing trace with hash -2100706650, now seen corresponding path program 11 times [2024-06-27 20:20:36,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:36,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420404934] [2024-06-27 20:20:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:36,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:37,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:37,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420404934] [2024-06-27 20:20:37,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420404934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:37,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:37,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:37,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713471419] [2024-06-27 20:20:37,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:37,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:37,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:37,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:37,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:37,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:37,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 192 transitions, 1478 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:37,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:37,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:37,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:37,783 INFO L124 PetriNetUnfolderBase]: 549/983 cut-off events. [2024-06-27 20:20:37,783 INFO L125 PetriNetUnfolderBase]: For 78929/78929 co-relation queries the response was YES. [2024-06-27 20:20:37,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5988 conditions, 983 events. 549/983 cut-off events. For 78929/78929 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 4967 event pairs, 74 based on Foata normal form. 2/983 useless extension candidates. Maximal degree in co-relation 5876. Up to 846 conditions per place. [2024-06-27 20:20:37,791 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 180 selfloop transitions, 46 changer transitions 0/228 dead transitions. [2024-06-27 20:20:37,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 228 transitions, 2218 flow [2024-06-27 20:20:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-27 20:20:37,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-27 20:20:37,800 INFO L175 Difference]: Start difference. First operand has 234 places, 192 transitions, 1478 flow. Second operand 11 states and 129 transitions. [2024-06-27 20:20:37,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 228 transitions, 2218 flow [2024-06-27 20:20:37,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 228 transitions, 2149 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-27 20:20:37,971 INFO L231 Difference]: Finished difference. Result has 236 places, 210 transitions, 1807 flow [2024-06-27 20:20:37,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1807, PETRI_PLACES=236, PETRI_TRANSITIONS=210} [2024-06-27 20:20:37,971 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 206 predicate places. [2024-06-27 20:20:37,971 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 210 transitions, 1807 flow [2024-06-27 20:20:37,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:37,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:37,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:37,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:20:37,975 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:37,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:37,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2100706464, now seen corresponding path program 2 times [2024-06-27 20:20:37,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:37,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870896511] [2024-06-27 20:20:37,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:37,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:38,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:38,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870896511] [2024-06-27 20:20:38,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870896511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:38,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:38,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:38,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923444438] [2024-06-27 20:20:38,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:38,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:38,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:38,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:38,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:38,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:38,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 210 transitions, 1807 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:38,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:38,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:38,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:39,454 INFO L124 PetriNetUnfolderBase]: 565/1009 cut-off events. [2024-06-27 20:20:39,455 INFO L125 PetriNetUnfolderBase]: For 89255/89255 co-relation queries the response was YES. [2024-06-27 20:20:39,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6703 conditions, 1009 events. 565/1009 cut-off events. For 89255/89255 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5107 event pairs, 65 based on Foata normal form. 2/1009 useless extension candidates. Maximal degree in co-relation 6588. Up to 729 conditions per place. [2024-06-27 20:20:39,463 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 158 selfloop transitions, 76 changer transitions 0/236 dead transitions. [2024-06-27 20:20:39,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 236 transitions, 2655 flow [2024-06-27 20:20:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:20:39,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:20:39,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-27 20:20:39,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40053763440860213 [2024-06-27 20:20:39,464 INFO L175 Difference]: Start difference. First operand has 236 places, 210 transitions, 1807 flow. Second operand 12 states and 149 transitions. [2024-06-27 20:20:39,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 236 transitions, 2655 flow [2024-06-27 20:20:39,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 236 transitions, 2516 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-27 20:20:39,675 INFO L231 Difference]: Finished difference. Result has 244 places, 214 transitions, 1989 flow [2024-06-27 20:20:39,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1989, PETRI_PLACES=244, PETRI_TRANSITIONS=214} [2024-06-27 20:20:39,676 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 214 predicate places. [2024-06-27 20:20:39,676 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 214 transitions, 1989 flow [2024-06-27 20:20:39,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:39,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:39,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:39,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:20:39,676 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:39,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:39,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2065969334, now seen corresponding path program 12 times [2024-06-27 20:20:39,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:39,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733848939] [2024-06-27 20:20:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:39,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:40,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:40,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733848939] [2024-06-27 20:20:40,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733848939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:40,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:40,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:40,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111436435] [2024-06-27 20:20:40,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:40,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:40,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:40,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:40,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:40,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:40,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 214 transitions, 1989 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:40,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:40,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:40,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:41,064 INFO L124 PetriNetUnfolderBase]: 612/1102 cut-off events. [2024-06-27 20:20:41,064 INFO L125 PetriNetUnfolderBase]: For 142000/142000 co-relation queries the response was YES. [2024-06-27 20:20:41,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8319 conditions, 1102 events. 612/1102 cut-off events. For 142000/142000 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 5689 event pairs, 86 based on Foata normal form. 2/1102 useless extension candidates. Maximal degree in co-relation 8203. Up to 742 conditions per place. [2024-06-27 20:20:41,074 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 168 selfloop transitions, 72 changer transitions 0/242 dead transitions. [2024-06-27 20:20:41,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 242 transitions, 2855 flow [2024-06-27 20:20:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:41,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-06-27 20:20:41,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222873900293255 [2024-06-27 20:20:41,075 INFO L175 Difference]: Start difference. First operand has 244 places, 214 transitions, 1989 flow. Second operand 11 states and 144 transitions. [2024-06-27 20:20:41,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 242 transitions, 2855 flow [2024-06-27 20:20:41,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 242 transitions, 2683 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:41,318 INFO L231 Difference]: Finished difference. Result has 247 places, 216 transitions, 2035 flow [2024-06-27 20:20:41,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2035, PETRI_PLACES=247, PETRI_TRANSITIONS=216} [2024-06-27 20:20:41,319 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2024-06-27 20:20:41,319 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 216 transitions, 2035 flow [2024-06-27 20:20:41,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:41,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:41,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:41,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:20:41,319 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:41,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:41,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1724563796, now seen corresponding path program 3 times [2024-06-27 20:20:41,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:41,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811537724] [2024-06-27 20:20:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:41,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:42,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:42,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811537724] [2024-06-27 20:20:42,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811537724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:42,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:42,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:42,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609325940] [2024-06-27 20:20:42,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:42,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:42,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:42,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:42,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:42,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:42,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 216 transitions, 2035 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:42,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:42,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:42,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:42,750 INFO L124 PetriNetUnfolderBase]: 618/1112 cut-off events. [2024-06-27 20:20:42,750 INFO L125 PetriNetUnfolderBase]: For 144243/144243 co-relation queries the response was YES. [2024-06-27 20:20:42,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8471 conditions, 1112 events. 618/1112 cut-off events. For 144243/144243 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 5757 event pairs, 92 based on Foata normal form. 2/1112 useless extension candidates. Maximal degree in co-relation 8353. Up to 882 conditions per place. [2024-06-27 20:20:42,761 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 173 selfloop transitions, 65 changer transitions 0/240 dead transitions. [2024-06-27 20:20:42,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 240 transitions, 2638 flow [2024-06-27 20:20:42,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:20:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:20:42,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-27 20:20:42,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-27 20:20:42,762 INFO L175 Difference]: Start difference. First operand has 247 places, 216 transitions, 2035 flow. Second operand 12 states and 147 transitions. [2024-06-27 20:20:42,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 240 transitions, 2638 flow [2024-06-27 20:20:43,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 240 transitions, 2505 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:43,085 INFO L231 Difference]: Finished difference. Result has 252 places, 219 transitions, 2127 flow [2024-06-27 20:20:43,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2127, PETRI_PLACES=252, PETRI_TRANSITIONS=219} [2024-06-27 20:20:43,085 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 222 predicate places. [2024-06-27 20:20:43,085 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 219 transitions, 2127 flow [2024-06-27 20:20:43,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:43,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:43,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:43,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:20:43,086 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:43,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:43,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2066146964, now seen corresponding path program 13 times [2024-06-27 20:20:43,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:43,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084770066] [2024-06-27 20:20:43,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:43,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:43,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:43,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084770066] [2024-06-27 20:20:43,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084770066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:43,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:43,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:43,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048543715] [2024-06-27 20:20:43,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:43,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:43,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:43,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:43,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:44,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:44,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 219 transitions, 2127 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:44,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:44,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:44,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:44,451 INFO L124 PetriNetUnfolderBase]: 642/1164 cut-off events. [2024-06-27 20:20:44,451 INFO L125 PetriNetUnfolderBase]: For 193437/193437 co-relation queries the response was YES. [2024-06-27 20:20:44,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8879 conditions, 1164 events. 642/1164 cut-off events. For 193437/193437 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6135 event pairs, 94 based on Foata normal form. 14/1176 useless extension candidates. Maximal degree in co-relation 8759. Up to 882 conditions per place. [2024-06-27 20:20:44,462 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 172 selfloop transitions, 59 changer transitions 12/245 dead transitions. [2024-06-27 20:20:44,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 245 transitions, 2785 flow [2024-06-27 20:20:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-27 20:20:44,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:20:44,463 INFO L175 Difference]: Start difference. First operand has 252 places, 219 transitions, 2127 flow. Second operand 11 states and 143 transitions. [2024-06-27 20:20:44,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 245 transitions, 2785 flow [2024-06-27 20:20:44,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 245 transitions, 2587 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-27 20:20:44,777 INFO L231 Difference]: Finished difference. Result has 254 places, 215 transitions, 2041 flow [2024-06-27 20:20:44,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1929, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2041, PETRI_PLACES=254, PETRI_TRANSITIONS=215} [2024-06-27 20:20:44,778 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2024-06-27 20:20:44,778 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 215 transitions, 2041 flow [2024-06-27 20:20:44,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:44,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:44,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:44,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:20:44,778 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:44,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:44,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1895271554, now seen corresponding path program 14 times [2024-06-27 20:20:44,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:44,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913868874] [2024-06-27 20:20:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:44,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:45,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:45,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913868874] [2024-06-27 20:20:45,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913868874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:45,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:45,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:45,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230123033] [2024-06-27 20:20:45,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:45,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:45,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:45,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:45,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:45,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:45,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 215 transitions, 2041 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:45,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:45,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:45,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:46,044 INFO L124 PetriNetUnfolderBase]: 612/1106 cut-off events. [2024-06-27 20:20:46,044 INFO L125 PetriNetUnfolderBase]: For 149472/149472 co-relation queries the response was YES. [2024-06-27 20:20:46,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8500 conditions, 1106 events. 612/1106 cut-off events. For 149472/149472 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 5742 event pairs, 98 based on Foata normal form. 2/1106 useless extension candidates. Maximal degree in co-relation 8379. Up to 952 conditions per place. [2024-06-27 20:20:46,054 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 181 selfloop transitions, 53 changer transitions 0/236 dead transitions. [2024-06-27 20:20:46,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 236 transitions, 2607 flow [2024-06-27 20:20:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:46,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-27 20:20:46,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-27 20:20:46,056 INFO L175 Difference]: Start difference. First operand has 254 places, 215 transitions, 2041 flow. Second operand 11 states and 131 transitions. [2024-06-27 20:20:46,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 236 transitions, 2607 flow [2024-06-27 20:20:46,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 236 transitions, 2465 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 20:20:46,359 INFO L231 Difference]: Finished difference. Result has 256 places, 218 transitions, 2074 flow [2024-06-27 20:20:46,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2074, PETRI_PLACES=256, PETRI_TRANSITIONS=218} [2024-06-27 20:20:46,359 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 226 predicate places. [2024-06-27 20:20:46,359 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 218 transitions, 2074 flow [2024-06-27 20:20:46,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:46,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:46,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:46,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:20:46,360 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:46,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:46,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2072649338, now seen corresponding path program 1 times [2024-06-27 20:20:46,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:46,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395107459] [2024-06-27 20:20:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:46,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:47,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:47,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395107459] [2024-06-27 20:20:47,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395107459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:47,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:47,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:47,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364196465] [2024-06-27 20:20:47,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:47,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:47,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:47,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:47,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:47,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:47,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 218 transitions, 2074 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:47,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:47,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:47,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:47,612 INFO L124 PetriNetUnfolderBase]: 616/1114 cut-off events. [2024-06-27 20:20:47,613 INFO L125 PetriNetUnfolderBase]: For 151624/151624 co-relation queries the response was YES. [2024-06-27 20:20:47,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8534 conditions, 1114 events. 616/1114 cut-off events. For 151624/151624 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 5784 event pairs, 96 based on Foata normal form. 2/1114 useless extension candidates. Maximal degree in co-relation 8411. Up to 1031 conditions per place. [2024-06-27 20:20:47,623 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 207 selfloop transitions, 27 changer transitions 0/236 dead transitions. [2024-06-27 20:20:47,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 236 transitions, 2593 flow [2024-06-27 20:20:47,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:47,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-27 20:20:47,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-27 20:20:47,624 INFO L175 Difference]: Start difference. First operand has 256 places, 218 transitions, 2074 flow. Second operand 10 states and 117 transitions. [2024-06-27 20:20:47,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 236 transitions, 2593 flow [2024-06-27 20:20:47,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 236 transitions, 2474 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:47,948 INFO L231 Difference]: Finished difference. Result has 259 places, 219 transitions, 2023 flow [2024-06-27 20:20:47,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2023, PETRI_PLACES=259, PETRI_TRANSITIONS=219} [2024-06-27 20:20:47,949 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 229 predicate places. [2024-06-27 20:20:47,949 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 219 transitions, 2023 flow [2024-06-27 20:20:47,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:47,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:47,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:47,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:20:47,949 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:47,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:47,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1895151584, now seen corresponding path program 15 times [2024-06-27 20:20:47,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:47,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711256260] [2024-06-27 20:20:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:47,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:48,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:48,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711256260] [2024-06-27 20:20:48,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711256260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:48,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:48,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:48,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988821448] [2024-06-27 20:20:48,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:48,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:48,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:48,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:48,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:48,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:48,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 219 transitions, 2023 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:48,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:48,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:48,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:49,178 INFO L124 PetriNetUnfolderBase]: 627/1135 cut-off events. [2024-06-27 20:20:49,178 INFO L125 PetriNetUnfolderBase]: For 163815/163815 co-relation queries the response was YES. [2024-06-27 20:20:49,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8844 conditions, 1135 events. 627/1135 cut-off events. For 163815/163815 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 5958 event pairs, 95 based on Foata normal form. 2/1135 useless extension candidates. Maximal degree in co-relation 8721. Up to 903 conditions per place. [2024-06-27 20:20:49,186 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 181 selfloop transitions, 59 changer transitions 0/242 dead transitions. [2024-06-27 20:20:49,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 242 transitions, 2818 flow [2024-06-27 20:20:49,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:49,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-27 20:20:49,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-27 20:20:49,187 INFO L175 Difference]: Start difference. First operand has 259 places, 219 transitions, 2023 flow. Second operand 11 states and 134 transitions. [2024-06-27 20:20:49,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 242 transitions, 2818 flow [2024-06-27 20:20:49,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 242 transitions, 2745 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:49,542 INFO L231 Difference]: Finished difference. Result has 262 places, 221 transitions, 2144 flow [2024-06-27 20:20:49,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1956, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2144, PETRI_PLACES=262, PETRI_TRANSITIONS=221} [2024-06-27 20:20:49,543 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 232 predicate places. [2024-06-27 20:20:49,543 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 221 transitions, 2144 flow [2024-06-27 20:20:49,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:49,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:49,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:49,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:20:49,543 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:49,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:49,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1895271740, now seen corresponding path program 4 times [2024-06-27 20:20:49,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:49,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194296745] [2024-06-27 20:20:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:49,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:50,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:50,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194296745] [2024-06-27 20:20:50,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194296745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:50,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:50,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:50,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716660872] [2024-06-27 20:20:50,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:50,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:50,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:50,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:50,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:50,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:50,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 221 transitions, 2144 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:50,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:50,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:50,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:50,845 INFO L124 PetriNetUnfolderBase]: 643/1161 cut-off events. [2024-06-27 20:20:50,845 INFO L125 PetriNetUnfolderBase]: For 179480/179480 co-relation queries the response was YES. [2024-06-27 20:20:50,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9501 conditions, 1161 events. 643/1161 cut-off events. For 179480/179480 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6084 event pairs, 88 based on Foata normal form. 2/1161 useless extension candidates. Maximal degree in co-relation 9377. Up to 851 conditions per place. [2024-06-27 20:20:50,854 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 161 selfloop transitions, 83 changer transitions 0/246 dead transitions. [2024-06-27 20:20:50,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 246 transitions, 3024 flow [2024-06-27 20:20:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-27 20:20:50,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:20:50,855 INFO L175 Difference]: Start difference. First operand has 262 places, 221 transitions, 2144 flow. Second operand 11 states and 143 transitions. [2024-06-27 20:20:50,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 246 transitions, 3024 flow [2024-06-27 20:20:51,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 246 transitions, 2924 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:51,172 INFO L231 Difference]: Finished difference. Result has 266 places, 225 transitions, 2379 flow [2024-06-27 20:20:51,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2379, PETRI_PLACES=266, PETRI_TRANSITIONS=225} [2024-06-27 20:20:51,172 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 236 predicate places. [2024-06-27 20:20:51,172 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 225 transitions, 2379 flow [2024-06-27 20:20:51,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:51,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:51,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:51,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:20:51,173 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:51,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:51,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1895266904, now seen corresponding path program 16 times [2024-06-27 20:20:51,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:51,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091118990] [2024-06-27 20:20:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:51,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:51,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:51,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091118990] [2024-06-27 20:20:51,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091118990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:51,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:51,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:51,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816148437] [2024-06-27 20:20:51,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:51,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:51,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:51,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:51,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:52,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:52,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 225 transitions, 2379 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:52,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:52,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:52,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:52,376 INFO L124 PetriNetUnfolderBase]: 651/1177 cut-off events. [2024-06-27 20:20:52,377 INFO L125 PetriNetUnfolderBase]: For 183624/183624 co-relation queries the response was YES. [2024-06-27 20:20:52,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9783 conditions, 1177 events. 651/1177 cut-off events. For 183624/183624 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 6218 event pairs, 98 based on Foata normal form. 2/1177 useless extension candidates. Maximal degree in co-relation 9657. Up to 1009 conditions per place. [2024-06-27 20:20:52,388 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 190 selfloop transitions, 54 changer transitions 0/246 dead transitions. [2024-06-27 20:20:52,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 246 transitions, 2959 flow [2024-06-27 20:20:52,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-27 20:20:52,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-27 20:20:52,389 INFO L175 Difference]: Start difference. First operand has 266 places, 225 transitions, 2379 flow. Second operand 11 states and 133 transitions. [2024-06-27 20:20:52,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 246 transitions, 2959 flow [2024-06-27 20:20:52,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 246 transitions, 2796 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:52,815 INFO L231 Difference]: Finished difference. Result has 271 places, 227 transitions, 2371 flow [2024-06-27 20:20:52,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2216, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2371, PETRI_PLACES=271, PETRI_TRANSITIONS=227} [2024-06-27 20:20:52,815 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 241 predicate places. [2024-06-27 20:20:52,815 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 227 transitions, 2371 flow [2024-06-27 20:20:52,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:52,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:52,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:52,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:20:52,816 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:52,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:52,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1058855272, now seen corresponding path program 17 times [2024-06-27 20:20:52,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:52,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446084207] [2024-06-27 20:20:52,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:52,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:53,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:53,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446084207] [2024-06-27 20:20:53,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446084207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:53,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:53,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:53,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163423205] [2024-06-27 20:20:53,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:53,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:53,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:53,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:53,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:53,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:53,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 227 transitions, 2371 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:53,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:53,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:53,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:54,057 INFO L124 PetriNetUnfolderBase]: 678/1234 cut-off events. [2024-06-27 20:20:54,057 INFO L125 PetriNetUnfolderBase]: For 238976/238976 co-relation queries the response was YES. [2024-06-27 20:20:54,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10150 conditions, 1234 events. 678/1234 cut-off events. For 238976/238976 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6628 event pairs, 102 based on Foata normal form. 14/1246 useless extension candidates. Maximal degree in co-relation 10021. Up to 958 conditions per place. [2024-06-27 20:20:54,069 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 185 selfloop transitions, 56 changer transitions 12/255 dead transitions. [2024-06-27 20:20:54,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 255 transitions, 3075 flow [2024-06-27 20:20:54,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:54,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:54,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-06-27 20:20:54,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222873900293255 [2024-06-27 20:20:54,070 INFO L175 Difference]: Start difference. First operand has 271 places, 227 transitions, 2371 flow. Second operand 11 states and 144 transitions. [2024-06-27 20:20:54,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 255 transitions, 3075 flow [2024-06-27 20:20:54,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 255 transitions, 2941 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:54,496 INFO L231 Difference]: Finished difference. Result has 275 places, 225 transitions, 2372 flow [2024-06-27 20:20:54,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2372, PETRI_PLACES=275, PETRI_TRANSITIONS=225} [2024-06-27 20:20:54,496 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2024-06-27 20:20:54,496 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 225 transitions, 2372 flow [2024-06-27 20:20:54,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:54,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:54,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:54,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:20:54,497 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:54,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:54,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2028200032, now seen corresponding path program 5 times [2024-06-27 20:20:54,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:54,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141726338] [2024-06-27 20:20:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:54,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:55,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:55,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141726338] [2024-06-27 20:20:55,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141726338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:55,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:55,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:55,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957794663] [2024-06-27 20:20:55,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:55,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:55,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:55,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:55,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:55,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:55,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 225 transitions, 2372 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:55,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:55,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:55,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:55,966 INFO L124 PetriNetUnfolderBase]: 703/1273 cut-off events. [2024-06-27 20:20:55,966 INFO L125 PetriNetUnfolderBase]: For 190866/190866 co-relation queries the response was YES. [2024-06-27 20:20:55,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10533 conditions, 1273 events. 703/1273 cut-off events. For 190866/190866 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 6845 event pairs, 122 based on Foata normal form. 2/1273 useless extension candidates. Maximal degree in co-relation 10402. Up to 1069 conditions per place. [2024-06-27 20:20:55,980 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 214 selfloop transitions, 59 changer transitions 0/275 dead transitions. [2024-06-27 20:20:55,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 275 transitions, 3417 flow [2024-06-27 20:20:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:20:55,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:20:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-27 20:20:55,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-27 20:20:55,981 INFO L175 Difference]: Start difference. First operand has 275 places, 225 transitions, 2372 flow. Second operand 12 states and 140 transitions. [2024-06-27 20:20:55,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 275 transitions, 3417 flow [2024-06-27 20:20:56,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 275 transitions, 3120 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-06-27 20:20:56,466 INFO L231 Difference]: Finished difference. Result has 281 places, 252 transitions, 2735 flow [2024-06-27 20:20:56,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2165, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2735, PETRI_PLACES=281, PETRI_TRANSITIONS=252} [2024-06-27 20:20:56,466 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2024-06-27 20:20:56,466 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 252 transitions, 2735 flow [2024-06-27 20:20:56,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:56,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:56,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:56,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:20:56,467 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:56,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:56,467 INFO L85 PathProgramCache]: Analyzing trace with hash 2028022216, now seen corresponding path program 18 times [2024-06-27 20:20:56,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:56,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694461906] [2024-06-27 20:20:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:56,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:57,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:57,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694461906] [2024-06-27 20:20:57,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694461906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:57,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:57,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:57,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227833065] [2024-06-27 20:20:57,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:57,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:57,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:57,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:57,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:57,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:57,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 252 transitions, 2735 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:57,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:57,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:57,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:57,750 INFO L124 PetriNetUnfolderBase]: 707/1281 cut-off events. [2024-06-27 20:20:57,750 INFO L125 PetriNetUnfolderBase]: For 194556/194556 co-relation queries the response was YES. [2024-06-27 20:20:57,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10640 conditions, 1281 events. 707/1281 cut-off events. For 194556/194556 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 6911 event pairs, 107 based on Foata normal form. 2/1281 useless extension candidates. Maximal degree in co-relation 10503. Up to 1072 conditions per place. [2024-06-27 20:20:57,763 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 206 selfloop transitions, 64 changer transitions 0/272 dead transitions. [2024-06-27 20:20:57,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 272 transitions, 3564 flow [2024-06-27 20:20:57,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-27 20:20:57,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-27 20:20:57,764 INFO L175 Difference]: Start difference. First operand has 281 places, 252 transitions, 2735 flow. Second operand 11 states and 132 transitions. [2024-06-27 20:20:57,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 272 transitions, 3564 flow [2024-06-27 20:20:58,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 272 transitions, 3451 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-27 20:20:58,322 INFO L231 Difference]: Finished difference. Result has 290 places, 253 transitions, 2790 flow [2024-06-27 20:20:58,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2622, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2790, PETRI_PLACES=290, PETRI_TRANSITIONS=253} [2024-06-27 20:20:58,322 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2024-06-27 20:20:58,322 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 253 transitions, 2790 flow [2024-06-27 20:20:58,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:58,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:58,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:58,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:20:58,323 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:20:58,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:58,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2072403074, now seen corresponding path program 19 times [2024-06-27 20:20:58,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:58,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407752363] [2024-06-27 20:20:58,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:58,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:59,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:59,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407752363] [2024-06-27 20:20:59,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407752363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:59,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:59,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:59,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031534202] [2024-06-27 20:20:59,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:59,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:59,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:59,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:59,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:59,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:20:59,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 253 transitions, 2790 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:59,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:59,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:20:59,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:59,687 INFO L124 PetriNetUnfolderBase]: 688/1248 cut-off events. [2024-06-27 20:20:59,687 INFO L125 PetriNetUnfolderBase]: For 188129/188129 co-relation queries the response was YES. [2024-06-27 20:20:59,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9076 conditions, 1248 events. 688/1248 cut-off events. For 188129/188129 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 6733 event pairs, 86 based on Foata normal form. 14/1260 useless extension candidates. Maximal degree in co-relation 8937. Up to 909 conditions per place. [2024-06-27 20:20:59,697 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 185 selfloop transitions, 73 changer transitions 16/276 dead transitions. [2024-06-27 20:20:59,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 276 transitions, 3478 flow [2024-06-27 20:20:59,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:20:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:20:59,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-27 20:20:59,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41055718475073316 [2024-06-27 20:20:59,698 INFO L175 Difference]: Start difference. First operand has 290 places, 253 transitions, 2790 flow. Second operand 11 states and 140 transitions. [2024-06-27 20:20:59,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 276 transitions, 3478 flow [2024-06-27 20:21:00,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 276 transitions, 3317 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-27 20:21:00,041 INFO L231 Difference]: Finished difference. Result has 292 places, 244 transitions, 2681 flow [2024-06-27 20:21:00,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2629, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2681, PETRI_PLACES=292, PETRI_TRANSITIONS=244} [2024-06-27 20:21:00,041 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 262 predicate places. [2024-06-27 20:21:00,041 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 244 transitions, 2681 flow [2024-06-27 20:21:00,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:00,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:00,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:00,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:21:00,042 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:00,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:00,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1899740390, now seen corresponding path program 6 times [2024-06-27 20:21:00,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:00,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211673657] [2024-06-27 20:21:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:00,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:00,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:00,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211673657] [2024-06-27 20:21:00,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211673657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:00,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:00,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:00,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682555078] [2024-06-27 20:21:00,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:00,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:00,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:00,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:00,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:00,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 244 transitions, 2681 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:00,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:00,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:00,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:01,342 INFO L124 PetriNetUnfolderBase]: 644/1172 cut-off events. [2024-06-27 20:21:01,342 INFO L125 PetriNetUnfolderBase]: For 134293/134293 co-relation queries the response was YES. [2024-06-27 20:21:01,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8664 conditions, 1172 events. 644/1172 cut-off events. For 134293/134293 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6272 event pairs, 80 based on Foata normal form. 2/1172 useless extension candidates. Maximal degree in co-relation 8525. Up to 873 conditions per place. [2024-06-27 20:21:01,354 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 180 selfloop transitions, 83 changer transitions 0/265 dead transitions. [2024-06-27 20:21:01,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 265 transitions, 3529 flow [2024-06-27 20:21:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-27 20:21:01,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-27 20:21:01,356 INFO L175 Difference]: Start difference. First operand has 292 places, 244 transitions, 2681 flow. Second operand 11 states and 139 transitions. [2024-06-27 20:21:01,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 265 transitions, 3529 flow [2024-06-27 20:21:01,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 265 transitions, 3248 flow, removed 13 selfloop flow, removed 17 redundant places. [2024-06-27 20:21:01,726 INFO L231 Difference]: Finished difference. Result has 286 places, 246 transitions, 2651 flow [2024-06-27 20:21:01,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2651, PETRI_PLACES=286, PETRI_TRANSITIONS=246} [2024-06-27 20:21:01,727 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2024-06-27 20:21:01,727 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 246 transitions, 2651 flow [2024-06-27 20:21:01,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:01,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:01,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:01,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:21:01,727 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:01,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:01,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1059028252, now seen corresponding path program 20 times [2024-06-27 20:21:01,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:01,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999414436] [2024-06-27 20:21:01,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:01,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:02,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:02,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999414436] [2024-06-27 20:21:02,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999414436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:02,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:02,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:02,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325321425] [2024-06-27 20:21:02,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:02,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:02,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:02,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:02,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:02,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:02,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 246 transitions, 2651 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:02,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:02,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:02,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:03,021 INFO L124 PetriNetUnfolderBase]: 641/1167 cut-off events. [2024-06-27 20:21:03,021 INFO L125 PetriNetUnfolderBase]: For 126420/126420 co-relation queries the response was YES. [2024-06-27 20:21:03,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8250 conditions, 1167 events. 641/1167 cut-off events. For 126420/126420 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6287 event pairs, 81 based on Foata normal form. 2/1167 useless extension candidates. Maximal degree in co-relation 8114. Up to 897 conditions per place. [2024-06-27 20:21:03,032 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 182 selfloop transitions, 79 changer transitions 0/263 dead transitions. [2024-06-27 20:21:03,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 263 transitions, 3213 flow [2024-06-27 20:21:03,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:21:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:21:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-27 20:21:03,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-27 20:21:03,033 INFO L175 Difference]: Start difference. First operand has 286 places, 246 transitions, 2651 flow. Second operand 12 states and 140 transitions. [2024-06-27 20:21:03,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 263 transitions, 3213 flow [2024-06-27 20:21:03,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 263 transitions, 2852 flow, removed 54 selfloop flow, removed 11 redundant places. [2024-06-27 20:21:03,356 INFO L231 Difference]: Finished difference. Result has 287 places, 246 transitions, 2455 flow [2024-06-27 20:21:03,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2455, PETRI_PLACES=287, PETRI_TRANSITIONS=246} [2024-06-27 20:21:03,356 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 257 predicate places. [2024-06-27 20:21:03,356 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 246 transitions, 2455 flow [2024-06-27 20:21:03,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:03,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:03,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:03,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:21:03,357 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:03,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:03,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2072403260, now seen corresponding path program 7 times [2024-06-27 20:21:03,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:03,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058367800] [2024-06-27 20:21:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:03,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:04,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:04,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058367800] [2024-06-27 20:21:04,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058367800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:04,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:04,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:04,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853697331] [2024-06-27 20:21:04,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:04,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:04,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:04,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:04,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:04,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:04,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 246 transitions, 2455 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:04,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:04,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:04,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:04,771 INFO L124 PetriNetUnfolderBase]: 637/1161 cut-off events. [2024-06-27 20:21:04,771 INFO L125 PetriNetUnfolderBase]: For 116553/116553 co-relation queries the response was YES. [2024-06-27 20:21:04,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7642 conditions, 1161 events. 637/1161 cut-off events. For 116553/116553 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6269 event pairs, 80 based on Foata normal form. 2/1161 useless extension candidates. Maximal degree in co-relation 7507. Up to 908 conditions per place. [2024-06-27 20:21:04,780 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 186 selfloop transitions, 74 changer transitions 0/262 dead transitions. [2024-06-27 20:21:04,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 262 transitions, 3013 flow [2024-06-27 20:21:04,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:04,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:04,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-27 20:21:04,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-27 20:21:04,781 INFO L175 Difference]: Start difference. First operand has 287 places, 246 transitions, 2455 flow. Second operand 11 states and 131 transitions. [2024-06-27 20:21:04,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 262 transitions, 3013 flow [2024-06-27 20:21:05,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 262 transitions, 2796 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-27 20:21:05,114 INFO L231 Difference]: Finished difference. Result has 288 places, 246 transitions, 2391 flow [2024-06-27 20:21:05,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2238, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2391, PETRI_PLACES=288, PETRI_TRANSITIONS=246} [2024-06-27 20:21:05,114 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2024-06-27 20:21:05,114 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 246 transitions, 2391 flow [2024-06-27 20:21:05,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:05,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:05,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:05,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:21:05,114 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:05,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:05,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1945789996, now seen corresponding path program 8 times [2024-06-27 20:21:05,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:05,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905245032] [2024-06-27 20:21:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:05,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:05,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:05,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905245032] [2024-06-27 20:21:05,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905245032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:05,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:05,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:05,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604659283] [2024-06-27 20:21:05,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:05,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:05,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:05,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:05,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:06,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:06,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 246 transitions, 2391 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:06,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:06,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:06,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:06,604 INFO L124 PetriNetUnfolderBase]: 643/1171 cut-off events. [2024-06-27 20:21:06,604 INFO L125 PetriNetUnfolderBase]: For 116406/116406 co-relation queries the response was YES. [2024-06-27 20:21:06,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7695 conditions, 1171 events. 643/1171 cut-off events. For 116406/116406 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6342 event pairs, 90 based on Foata normal form. 2/1171 useless extension candidates. Maximal degree in co-relation 7559. Up to 1021 conditions per place. [2024-06-27 20:21:06,616 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 221 selfloop transitions, 45 changer transitions 0/268 dead transitions. [2024-06-27 20:21:06,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 268 transitions, 3060 flow [2024-06-27 20:21:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:21:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:21:06,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-27 20:21:06,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-27 20:21:06,617 INFO L175 Difference]: Start difference. First operand has 288 places, 246 transitions, 2391 flow. Second operand 12 states and 141 transitions. [2024-06-27 20:21:06,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 268 transitions, 3060 flow [2024-06-27 20:21:06,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 268 transitions, 2841 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 20:21:06,911 INFO L231 Difference]: Finished difference. Result has 290 places, 249 transitions, 2363 flow [2024-06-27 20:21:06,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2363, PETRI_PLACES=290, PETRI_TRANSITIONS=249} [2024-06-27 20:21:06,912 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2024-06-27 20:21:06,912 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 249 transitions, 2363 flow [2024-06-27 20:21:06,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:06,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:06,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:06,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:21:06,912 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:06,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:06,913 INFO L85 PathProgramCache]: Analyzing trace with hash 30258836, now seen corresponding path program 21 times [2024-06-27 20:21:06,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:06,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008460661] [2024-06-27 20:21:06,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:06,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:07,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:07,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008460661] [2024-06-27 20:21:07,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008460661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:07,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:07,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:07,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162293184] [2024-06-27 20:21:07,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:07,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:07,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:07,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:07,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:07,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:07,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 249 transitions, 2363 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:07,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:07,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:07,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:08,229 INFO L124 PetriNetUnfolderBase]: 667/1223 cut-off events. [2024-06-27 20:21:08,229 INFO L125 PetriNetUnfolderBase]: For 180701/180701 co-relation queries the response was YES. [2024-06-27 20:21:08,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7911 conditions, 1223 events. 667/1223 cut-off events. For 180701/180701 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6657 event pairs, 94 based on Foata normal form. 14/1235 useless extension candidates. Maximal degree in co-relation 7774. Up to 1021 conditions per place. [2024-06-27 20:21:08,242 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 220 selfloop transitions, 40 changer transitions 11/273 dead transitions. [2024-06-27 20:21:08,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 273 transitions, 3093 flow [2024-06-27 20:21:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-27 20:21:08,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-27 20:21:08,243 INFO L175 Difference]: Start difference. First operand has 290 places, 249 transitions, 2363 flow. Second operand 11 states and 137 transitions. [2024-06-27 20:21:08,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 273 transitions, 3093 flow [2024-06-27 20:21:08,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 273 transitions, 2928 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-27 20:21:08,592 INFO L231 Difference]: Finished difference. Result has 292 places, 246 transitions, 2282 flow [2024-06-27 20:21:08,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2282, PETRI_PLACES=292, PETRI_TRANSITIONS=246} [2024-06-27 20:21:08,593 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 262 predicate places. [2024-06-27 20:21:08,593 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 246 transitions, 2282 flow [2024-06-27 20:21:08,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:08,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:08,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:08,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:21:08,593 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:08,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:08,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1709355446, now seen corresponding path program 22 times [2024-06-27 20:21:08,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:08,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293166794] [2024-06-27 20:21:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:08,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:09,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:09,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293166794] [2024-06-27 20:21:09,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293166794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:09,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:09,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:09,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808988826] [2024-06-27 20:21:09,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:09,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:09,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:09,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:09,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:09,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:09,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 246 transitions, 2282 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:09,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:09,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:09,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:09,869 INFO L124 PetriNetUnfolderBase]: 657/1209 cut-off events. [2024-06-27 20:21:09,869 INFO L125 PetriNetUnfolderBase]: For 183681/183681 co-relation queries the response was YES. [2024-06-27 20:21:09,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7786 conditions, 1209 events. 657/1209 cut-off events. For 183681/183681 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 6581 event pairs, 100 based on Foata normal form. 14/1221 useless extension candidates. Maximal degree in co-relation 7648. Up to 1062 conditions per place. [2024-06-27 20:21:09,879 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 231 selfloop transitions, 26 changer transitions 11/270 dead transitions. [2024-06-27 20:21:09,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 270 transitions, 3015 flow [2024-06-27 20:21:09,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-27 20:21:09,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-27 20:21:09,880 INFO L175 Difference]: Start difference. First operand has 292 places, 246 transitions, 2282 flow. Second operand 11 states and 131 transitions. [2024-06-27 20:21:09,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 270 transitions, 3015 flow [2024-06-27 20:21:10,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 270 transitions, 2905 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 20:21:10,251 INFO L231 Difference]: Finished difference. Result has 293 places, 244 transitions, 2240 flow [2024-06-27 20:21:10,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2240, PETRI_PLACES=293, PETRI_TRANSITIONS=244} [2024-06-27 20:21:10,251 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 263 predicate places. [2024-06-27 20:21:10,251 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 244 transitions, 2240 flow [2024-06-27 20:21:10,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:10,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:10,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:10,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:21:10,252 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:10,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:10,252 INFO L85 PathProgramCache]: Analyzing trace with hash 30081206, now seen corresponding path program 23 times [2024-06-27 20:21:10,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:10,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625068988] [2024-06-27 20:21:10,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:10,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:10,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:10,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625068988] [2024-06-27 20:21:10,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625068988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:10,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:10,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:10,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066002209] [2024-06-27 20:21:10,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:10,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:10,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:10,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:10,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:11,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:11,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 244 transitions, 2240 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:11,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:11,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:11,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:11,523 INFO L124 PetriNetUnfolderBase]: 636/1170 cut-off events. [2024-06-27 20:21:11,523 INFO L125 PetriNetUnfolderBase]: For 134517/134517 co-relation queries the response was YES. [2024-06-27 20:21:11,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7803 conditions, 1170 events. 636/1170 cut-off events. For 134517/134517 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 6383 event pairs, 91 based on Foata normal form. 2/1170 useless extension candidates. Maximal degree in co-relation 7664. Up to 1060 conditions per place. [2024-06-27 20:21:11,535 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 225 selfloop transitions, 37 changer transitions 1/265 dead transitions. [2024-06-27 20:21:11,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 265 transitions, 3123 flow [2024-06-27 20:21:11,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-27 20:21:11,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-27 20:21:11,536 INFO L175 Difference]: Start difference. First operand has 293 places, 244 transitions, 2240 flow. Second operand 11 states and 125 transitions. [2024-06-27 20:21:11,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 265 transitions, 3123 flow [2024-06-27 20:21:11,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 265 transitions, 3037 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 20:21:11,884 INFO L231 Difference]: Finished difference. Result has 297 places, 250 transitions, 2362 flow [2024-06-27 20:21:11,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2362, PETRI_PLACES=297, PETRI_TRANSITIONS=250} [2024-06-27 20:21:11,884 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 267 predicate places. [2024-06-27 20:21:11,884 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 250 transitions, 2362 flow [2024-06-27 20:21:11,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:11,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:11,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:11,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:21:11,885 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:11,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:11,885 INFO L85 PathProgramCache]: Analyzing trace with hash 6434264, now seen corresponding path program 2 times [2024-06-27 20:21:11,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:11,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259403236] [2024-06-27 20:21:11,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:11,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:12,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:12,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259403236] [2024-06-27 20:21:12,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259403236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:12,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:12,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:12,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374637143] [2024-06-27 20:21:12,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:12,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:12,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:12,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:12,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:12,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:12,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 250 transitions, 2362 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:12,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:12,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:12,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:13,232 INFO L124 PetriNetUnfolderBase]: 640/1178 cut-off events. [2024-06-27 20:21:13,232 INFO L125 PetriNetUnfolderBase]: For 136703/136703 co-relation queries the response was YES. [2024-06-27 20:21:13,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7866 conditions, 1178 events. 640/1178 cut-off events. For 136703/136703 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6454 event pairs, 93 based on Foata normal form. 2/1178 useless extension candidates. Maximal degree in co-relation 7724. Up to 1132 conditions per place. [2024-06-27 20:21:13,246 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 245 selfloop transitions, 18 changer transitions 1/266 dead transitions. [2024-06-27 20:21:13,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 266 transitions, 2953 flow [2024-06-27 20:21:13,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:21:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:21:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-27 20:21:13,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:21:13,247 INFO L175 Difference]: Start difference. First operand has 297 places, 250 transitions, 2362 flow. Second operand 10 states and 110 transitions. [2024-06-27 20:21:13,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 266 transitions, 2953 flow [2024-06-27 20:21:13,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 266 transitions, 2856 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 20:21:13,618 INFO L231 Difference]: Finished difference. Result has 304 places, 252 transitions, 2336 flow [2024-06-27 20:21:13,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2275, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2336, PETRI_PLACES=304, PETRI_TRANSITIONS=252} [2024-06-27 20:21:13,619 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 274 predicate places. [2024-06-27 20:21:13,619 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 252 transitions, 2336 flow [2024-06-27 20:21:13,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:13,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:13,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:13,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:21:13,619 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:13,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:13,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1709355260, now seen corresponding path program 9 times [2024-06-27 20:21:13,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:13,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327458724] [2024-06-27 20:21:13,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:13,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:14,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:14,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327458724] [2024-06-27 20:21:14,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327458724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:14,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:14,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:14,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031890350] [2024-06-27 20:21:14,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:14,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:14,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:14,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:14,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:14,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 252 transitions, 2336 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:14,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:14,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:14,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:15,121 INFO L124 PetriNetUnfolderBase]: 642/1184 cut-off events. [2024-06-27 20:21:15,121 INFO L125 PetriNetUnfolderBase]: For 139392/139392 co-relation queries the response was YES. [2024-06-27 20:21:15,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7945 conditions, 1184 events. 642/1184 cut-off events. For 139392/139392 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6486 event pairs, 93 based on Foata normal form. 2/1184 useless extension candidates. Maximal degree in co-relation 7800. Up to 1101 conditions per place. [2024-06-27 20:21:15,135 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 239 selfloop transitions, 27 changer transitions 3/271 dead transitions. [2024-06-27 20:21:15,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 271 transitions, 3006 flow [2024-06-27 20:21:15,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:21:15,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:21:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-27 20:21:15,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-27 20:21:15,136 INFO L175 Difference]: Start difference. First operand has 304 places, 252 transitions, 2336 flow. Second operand 12 states and 131 transitions. [2024-06-27 20:21:15,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 271 transitions, 3006 flow [2024-06-27 20:21:15,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 271 transitions, 2968 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:15,445 INFO L231 Difference]: Finished difference. Result has 310 places, 254 transitions, 2449 flow [2024-06-27 20:21:15,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2449, PETRI_PLACES=310, PETRI_TRANSITIONS=254} [2024-06-27 20:21:15,445 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 280 predicate places. [2024-06-27 20:21:15,445 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 254 transitions, 2449 flow [2024-06-27 20:21:15,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:15,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:15,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:15,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:21:15,446 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:15,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:15,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1747413436, now seen corresponding path program 10 times [2024-06-27 20:21:15,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:15,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691325116] [2024-06-27 20:21:15,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:15,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:16,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:16,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691325116] [2024-06-27 20:21:16,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691325116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:16,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:16,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:16,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263330118] [2024-06-27 20:21:16,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:16,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:16,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:16,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:16,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:16,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:16,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 254 transitions, 2449 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:16,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:16,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:16,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:16,901 INFO L124 PetriNetUnfolderBase]: 646/1188 cut-off events. [2024-06-27 20:21:16,901 INFO L125 PetriNetUnfolderBase]: For 143414/143414 co-relation queries the response was YES. [2024-06-27 20:21:16,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8146 conditions, 1188 events. 646/1188 cut-off events. For 143414/143414 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6514 event pairs, 91 based on Foata normal form. 2/1188 useless extension candidates. Maximal degree in co-relation 7999. Up to 1103 conditions per place. [2024-06-27 20:21:16,914 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 242 selfloop transitions, 30 changer transitions 0/274 dead transitions. [2024-06-27 20:21:16,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 274 transitions, 3135 flow [2024-06-27 20:21:16,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:21:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:21:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-27 20:21:16,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-27 20:21:16,915 INFO L175 Difference]: Start difference. First operand has 310 places, 254 transitions, 2449 flow. Second operand 12 states and 134 transitions. [2024-06-27 20:21:16,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 274 transitions, 3135 flow [2024-06-27 20:21:17,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 274 transitions, 3004 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-27 20:21:17,249 INFO L231 Difference]: Finished difference. Result has 313 places, 257 transitions, 2490 flow [2024-06-27 20:21:17,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2490, PETRI_PLACES=313, PETRI_TRANSITIONS=257} [2024-06-27 20:21:17,249 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2024-06-27 20:21:17,249 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 257 transitions, 2490 flow [2024-06-27 20:21:17,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:17,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:17,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:17,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:21:17,250 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:17,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:17,250 INFO L85 PathProgramCache]: Analyzing trace with hash 30086042, now seen corresponding path program 11 times [2024-06-27 20:21:17,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:17,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410065662] [2024-06-27 20:21:17,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:17,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:17,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:17,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410065662] [2024-06-27 20:21:17,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410065662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:17,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:17,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:17,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794158885] [2024-06-27 20:21:17,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:17,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:17,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:17,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:17,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:18,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:18,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 257 transitions, 2490 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:18,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:18,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:18,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:18,577 INFO L124 PetriNetUnfolderBase]: 662/1214 cut-off events. [2024-06-27 20:21:18,577 INFO L125 PetriNetUnfolderBase]: For 159777/159777 co-relation queries the response was YES. [2024-06-27 20:21:18,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8708 conditions, 1214 events. 662/1214 cut-off events. For 159777/159777 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 6646 event pairs, 88 based on Foata normal form. 2/1214 useless extension candidates. Maximal degree in co-relation 8559. Up to 1034 conditions per place. [2024-06-27 20:21:18,588 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 223 selfloop transitions, 53 changer transitions 0/278 dead transitions. [2024-06-27 20:21:18,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 278 transitions, 3478 flow [2024-06-27 20:21:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-27 20:21:18,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-27 20:21:18,588 INFO L175 Difference]: Start difference. First operand has 313 places, 257 transitions, 2490 flow. Second operand 11 states and 135 transitions. [2024-06-27 20:21:18,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 278 transitions, 3478 flow [2024-06-27 20:21:18,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 278 transitions, 3333 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-27 20:21:18,958 INFO L231 Difference]: Finished difference. Result has 315 places, 261 transitions, 2644 flow [2024-06-27 20:21:18,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2644, PETRI_PLACES=315, PETRI_TRANSITIONS=261} [2024-06-27 20:21:18,958 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 285 predicate places. [2024-06-27 20:21:18,958 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 261 transitions, 2644 flow [2024-06-27 20:21:18,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:18,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:18,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:18,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:21:18,958 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:18,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:18,959 INFO L85 PathProgramCache]: Analyzing trace with hash 30085856, now seen corresponding path program 24 times [2024-06-27 20:21:18,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:18,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792311475] [2024-06-27 20:21:18,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:18,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:19,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:19,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792311475] [2024-06-27 20:21:19,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792311475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:19,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:19,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:19,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452639098] [2024-06-27 20:21:19,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:19,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:19,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:19,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:19,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:19,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 261 transitions, 2644 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:19,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:19,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:19,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:20,239 INFO L124 PetriNetUnfolderBase]: 666/1222 cut-off events. [2024-06-27 20:21:20,239 INFO L125 PetriNetUnfolderBase]: For 162162/162162 co-relation queries the response was YES. [2024-06-27 20:21:20,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8761 conditions, 1222 events. 666/1222 cut-off events. For 162162/162162 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 6701 event pairs, 96 based on Foata normal form. 2/1222 useless extension candidates. Maximal degree in co-relation 8611. Up to 1137 conditions per place. [2024-06-27 20:21:20,250 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 235 selfloop transitions, 37 changer transitions 0/274 dead transitions. [2024-06-27 20:21:20,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 274 transitions, 3253 flow [2024-06-27 20:21:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:20,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-27 20:21:20,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-27 20:21:20,251 INFO L175 Difference]: Start difference. First operand has 315 places, 261 transitions, 2644 flow. Second operand 11 states and 123 transitions. [2024-06-27 20:21:20,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 274 transitions, 3253 flow [2024-06-27 20:21:20,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 274 transitions, 3095 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:20,663 INFO L231 Difference]: Finished difference. Result has 319 places, 262 transitions, 2600 flow [2024-06-27 20:21:20,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2600, PETRI_PLACES=319, PETRI_TRANSITIONS=262} [2024-06-27 20:21:20,663 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 289 predicate places. [2024-06-27 20:21:20,663 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 262 transitions, 2600 flow [2024-06-27 20:21:20,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:20,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:20,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:20,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:21:20,664 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:20,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:20,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1747413250, now seen corresponding path program 25 times [2024-06-27 20:21:20,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:20,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348308427] [2024-06-27 20:21:20,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:20,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:21,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:21,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348308427] [2024-06-27 20:21:21,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348308427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:21,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:21,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:21,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411719668] [2024-06-27 20:21:21,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:21,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:21,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:21,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:21,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:21,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:21,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 262 transitions, 2600 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:21,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:21,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:21,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:22,022 INFO L124 PetriNetUnfolderBase]: 690/1274 cut-off events. [2024-06-27 20:21:22,022 INFO L125 PetriNetUnfolderBase]: For 235270/235270 co-relation queries the response was YES. [2024-06-27 20:21:22,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9071 conditions, 1274 events. 690/1274 cut-off events. For 235270/235270 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7042 event pairs, 96 based on Foata normal form. 14/1286 useless extension candidates. Maximal degree in co-relation 8919. Up to 1137 conditions per place. [2024-06-27 20:21:22,034 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 246 selfloop transitions, 25 changer transitions 11/284 dead transitions. [2024-06-27 20:21:22,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 284 transitions, 3364 flow [2024-06-27 20:21:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-27 20:21:22,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-27 20:21:22,035 INFO L175 Difference]: Start difference. First operand has 319 places, 262 transitions, 2600 flow. Second operand 11 states and 130 transitions. [2024-06-27 20:21:22,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 284 transitions, 3364 flow [2024-06-27 20:21:22,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 284 transitions, 3259 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 20:21:22,429 INFO L231 Difference]: Finished difference. Result has 321 places, 259 transitions, 2554 flow [2024-06-27 20:21:22,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2497, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2554, PETRI_PLACES=321, PETRI_TRANSITIONS=259} [2024-06-27 20:21:22,429 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 291 predicate places. [2024-06-27 20:21:22,429 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 259 transitions, 2554 flow [2024-06-27 20:21:22,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:22,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:22,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:22,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:21:22,429 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:22,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:22,430 INFO L85 PathProgramCache]: Analyzing trace with hash 868703700, now seen corresponding path program 3 times [2024-06-27 20:21:22,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:22,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713020632] [2024-06-27 20:21:22,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:22,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:23,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:23,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713020632] [2024-06-27 20:21:23,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713020632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:23,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:23,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:23,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858302241] [2024-06-27 20:21:23,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:23,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:23,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:23,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:23,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:23,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:23,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 259 transitions, 2554 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:23,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:23,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:23,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:23,668 INFO L124 PetriNetUnfolderBase]: 660/1216 cut-off events. [2024-06-27 20:21:23,668 INFO L125 PetriNetUnfolderBase]: For 166235/166235 co-relation queries the response was YES. [2024-06-27 20:21:23,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8652 conditions, 1216 events. 660/1216 cut-off events. For 166235/166235 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 6693 event pairs, 92 based on Foata normal form. 2/1216 useless extension candidates. Maximal degree in co-relation 8499. Up to 1155 conditions per place. [2024-06-27 20:21:23,682 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 249 selfloop transitions, 23 changer transitions 0/274 dead transitions. [2024-06-27 20:21:23,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 274 transitions, 3153 flow [2024-06-27 20:21:23,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:21:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:21:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-27 20:21:23,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-27 20:21:23,682 INFO L175 Difference]: Start difference. First operand has 321 places, 259 transitions, 2554 flow. Second operand 10 states and 112 transitions. [2024-06-27 20:21:23,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 274 transitions, 3153 flow [2024-06-27 20:21:24,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 274 transitions, 3067 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-27 20:21:24,118 INFO L231 Difference]: Finished difference. Result has 322 places, 261 transitions, 2542 flow [2024-06-27 20:21:24,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2468, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2542, PETRI_PLACES=322, PETRI_TRANSITIONS=261} [2024-06-27 20:21:24,118 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2024-06-27 20:21:24,118 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 261 transitions, 2542 flow [2024-06-27 20:21:24,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:24,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:24,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:24,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:21:24,119 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:24,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:24,119 INFO L85 PathProgramCache]: Analyzing trace with hash -240904, now seen corresponding path program 12 times [2024-06-27 20:21:24,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:24,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870933311] [2024-06-27 20:21:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:24,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:24,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:24,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870933311] [2024-06-27 20:21:24,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870933311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:24,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:24,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:24,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829030605] [2024-06-27 20:21:24,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:24,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:24,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:24,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:24,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:24,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:24,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 261 transitions, 2542 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:24,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:24,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:24,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:25,431 INFO L124 PetriNetUnfolderBase]: 676/1242 cut-off events. [2024-06-27 20:21:25,432 INFO L125 PetriNetUnfolderBase]: For 184417/184417 co-relation queries the response was YES. [2024-06-27 20:21:25,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9252 conditions, 1242 events. 676/1242 cut-off events. For 184417/184417 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 6847 event pairs, 91 based on Foata normal form. 2/1242 useless extension candidates. Maximal degree in co-relation 9097. Up to 1104 conditions per place. [2024-06-27 20:21:25,447 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 238 selfloop transitions, 42 changer transitions 0/282 dead transitions. [2024-06-27 20:21:25,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 282 transitions, 3564 flow [2024-06-27 20:21:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-27 20:21:25,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-27 20:21:25,448 INFO L175 Difference]: Start difference. First operand has 322 places, 261 transitions, 2542 flow. Second operand 11 states and 128 transitions. [2024-06-27 20:21:25,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 282 transitions, 3564 flow [2024-06-27 20:21:25,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 282 transitions, 3504 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:21:25,978 INFO L231 Difference]: Finished difference. Result has 325 places, 265 transitions, 2767 flow [2024-06-27 20:21:25,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2482, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2767, PETRI_PLACES=325, PETRI_TRANSITIONS=265} [2024-06-27 20:21:25,979 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 295 predicate places. [2024-06-27 20:21:25,980 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 265 transitions, 2767 flow [2024-06-27 20:21:25,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:25,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:25,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:25,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:21:25,980 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:25,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash -140621224, now seen corresponding path program 26 times [2024-06-27 20:21:25,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:25,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989519675] [2024-06-27 20:21:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:25,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:26,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:26,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989519675] [2024-06-27 20:21:26,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989519675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:26,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:26,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:26,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42617850] [2024-06-27 20:21:26,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:26,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:26,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:26,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:26,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:26,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:26,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 265 transitions, 2767 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:26,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:26,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:26,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:27,172 INFO L124 PetriNetUnfolderBase]: 697/1281 cut-off events. [2024-06-27 20:21:27,172 INFO L125 PetriNetUnfolderBase]: For 202477/202477 co-relation queries the response was YES. [2024-06-27 20:21:27,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9858 conditions, 1281 events. 697/1281 cut-off events. For 202477/202477 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 7127 event pairs, 100 based on Foata normal form. 2/1281 useless extension candidates. Maximal degree in co-relation 9703. Up to 1147 conditions per place. [2024-06-27 20:21:27,186 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 229 selfloop transitions, 58 changer transitions 0/289 dead transitions. [2024-06-27 20:21:27,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 289 transitions, 3734 flow [2024-06-27 20:21:27,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:27,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-27 20:21:27,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-27 20:21:27,187 INFO L175 Difference]: Start difference. First operand has 325 places, 265 transitions, 2767 flow. Second operand 11 states and 125 transitions. [2024-06-27 20:21:27,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 289 transitions, 3734 flow [2024-06-27 20:21:27,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 289 transitions, 3580 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:27,704 INFO L231 Difference]: Finished difference. Result has 332 places, 275 transitions, 2923 flow [2024-06-27 20:21:27,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2615, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2923, PETRI_PLACES=332, PETRI_TRANSITIONS=275} [2024-06-27 20:21:27,704 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 302 predicate places. [2024-06-27 20:21:27,704 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 275 transitions, 2923 flow [2024-06-27 20:21:27,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:27,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:27,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:27,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:21:27,705 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:27,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:27,705 INFO L85 PathProgramCache]: Analyzing trace with hash 868457436, now seen corresponding path program 27 times [2024-06-27 20:21:27,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:27,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210170654] [2024-06-27 20:21:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:27,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:28,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:28,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210170654] [2024-06-27 20:21:28,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210170654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:28,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:28,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:28,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301029893] [2024-06-27 20:21:28,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:28,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:28,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:28,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:28,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:28,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:28,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 275 transitions, 2923 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:28,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:28,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:28,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:29,026 INFO L124 PetriNetUnfolderBase]: 714/1320 cut-off events. [2024-06-27 20:21:29,026 INFO L125 PetriNetUnfolderBase]: For 268270/268270 co-relation queries the response was YES. [2024-06-27 20:21:29,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9932 conditions, 1320 events. 714/1320 cut-off events. For 268270/268270 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 7374 event pairs, 95 based on Foata normal form. 14/1332 useless extension candidates. Maximal degree in co-relation 9772. Up to 1140 conditions per place. [2024-06-27 20:21:29,041 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 245 selfloop transitions, 35 changer transitions 13/295 dead transitions. [2024-06-27 20:21:29,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 295 transitions, 3659 flow [2024-06-27 20:21:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:29,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:29,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-27 20:21:29,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-27 20:21:29,041 INFO L175 Difference]: Start difference. First operand has 332 places, 275 transitions, 2923 flow. Second operand 11 states and 134 transitions. [2024-06-27 20:21:29,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 295 transitions, 3659 flow [2024-06-27 20:21:29,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 295 transitions, 3561 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 20:21:29,558 INFO L231 Difference]: Finished difference. Result has 339 places, 269 transitions, 2844 flow [2024-06-27 20:21:29,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2844, PETRI_PLACES=339, PETRI_TRANSITIONS=269} [2024-06-27 20:21:29,558 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 309 predicate places. [2024-06-27 20:21:29,558 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 269 transitions, 2844 flow [2024-06-27 20:21:29,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:29,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:29,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:29,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:21:29,559 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:29,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:29,559 INFO L85 PathProgramCache]: Analyzing trace with hash -241090, now seen corresponding path program 28 times [2024-06-27 20:21:29,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:29,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231396969] [2024-06-27 20:21:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:29,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:30,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:30,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231396969] [2024-06-27 20:21:30,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231396969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:30,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:30,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:30,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237292600] [2024-06-27 20:21:30,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:30,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:30,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:30,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:30,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:30,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:30,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 269 transitions, 2844 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:30,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:30,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:30,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:30,840 INFO L124 PetriNetUnfolderBase]: 680/1258 cut-off events. [2024-06-27 20:21:30,840 INFO L125 PetriNetUnfolderBase]: For 193503/193503 co-relation queries the response was YES. [2024-06-27 20:21:30,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9524 conditions, 1258 events. 680/1258 cut-off events. For 193503/193503 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 7027 event pairs, 93 based on Foata normal form. 2/1258 useless extension candidates. Maximal degree in co-relation 9363. Up to 1161 conditions per place. [2024-06-27 20:21:30,855 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 246 selfloop transitions, 37 changer transitions 0/285 dead transitions. [2024-06-27 20:21:30,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 285 transitions, 3486 flow [2024-06-27 20:21:30,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:21:30,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:21:30,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-27 20:21:30,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:21:30,856 INFO L175 Difference]: Start difference. First operand has 339 places, 269 transitions, 2844 flow. Second operand 12 states and 132 transitions. [2024-06-27 20:21:30,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 285 transitions, 3486 flow [2024-06-27 20:21:31,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 285 transitions, 3380 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-06-27 20:21:31,440 INFO L231 Difference]: Finished difference. Result has 337 places, 270 transitions, 2864 flow [2024-06-27 20:21:31,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2738, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2864, PETRI_PLACES=337, PETRI_TRANSITIONS=270} [2024-06-27 20:21:31,440 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 307 predicate places. [2024-06-27 20:21:31,440 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 270 transitions, 2864 flow [2024-06-27 20:21:31,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:31,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:31,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:31,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:21:31,441 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:31,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:31,441 INFO L85 PathProgramCache]: Analyzing trace with hash 691326102, now seen corresponding path program 13 times [2024-06-27 20:21:31,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:31,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177736918] [2024-06-27 20:21:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:31,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:32,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:32,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177736918] [2024-06-27 20:21:32,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177736918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:32,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:32,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:32,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136149474] [2024-06-27 20:21:32,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:32,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:32,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:32,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:32,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:32,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:32,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 270 transitions, 2864 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:32,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:32,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:32,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:33,032 INFO L124 PetriNetUnfolderBase]: 686/1268 cut-off events. [2024-06-27 20:21:33,032 INFO L125 PetriNetUnfolderBase]: For 197784/197784 co-relation queries the response was YES. [2024-06-27 20:21:33,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9671 conditions, 1268 events. 686/1268 cut-off events. For 197784/197784 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7098 event pairs, 93 based on Foata normal form. 2/1268 useless extension candidates. Maximal degree in co-relation 9511. Up to 1051 conditions per place. [2024-06-27 20:21:33,047 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 218 selfloop transitions, 74 changer transitions 0/294 dead transitions. [2024-06-27 20:21:33,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 294 transitions, 3908 flow [2024-06-27 20:21:33,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 20:21:33,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 20:21:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 160 transitions. [2024-06-27 20:21:33,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-27 20:21:33,048 INFO L175 Difference]: Start difference. First operand has 337 places, 270 transitions, 2864 flow. Second operand 14 states and 160 transitions. [2024-06-27 20:21:33,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 294 transitions, 3908 flow [2024-06-27 20:21:33,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 294 transitions, 3798 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-27 20:21:33,650 INFO L231 Difference]: Finished difference. Result has 342 places, 274 transitions, 3138 flow [2024-06-27 20:21:33,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3138, PETRI_PLACES=342, PETRI_TRANSITIONS=274} [2024-06-27 20:21:33,651 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 312 predicate places. [2024-06-27 20:21:33,651 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 274 transitions, 3138 flow [2024-06-27 20:21:33,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:33,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:33,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:33,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:21:33,651 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:33,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:33,652 INFO L85 PathProgramCache]: Analyzing trace with hash 691325916, now seen corresponding path program 29 times [2024-06-27 20:21:33,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:33,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973950256] [2024-06-27 20:21:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:33,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:34,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:34,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973950256] [2024-06-27 20:21:34,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973950256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:34,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:34,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:34,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606126613] [2024-06-27 20:21:34,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:34,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:34,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:34,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:34,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:34,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:34,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 274 transitions, 3138 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:34,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:34,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:34,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:34,877 INFO L124 PetriNetUnfolderBase]: 683/1263 cut-off events. [2024-06-27 20:21:34,877 INFO L125 PetriNetUnfolderBase]: For 187187/187187 co-relation queries the response was YES. [2024-06-27 20:21:34,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9544 conditions, 1263 events. 683/1263 cut-off events. For 187187/187187 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 7056 event pairs, 96 based on Foata normal form. 2/1263 useless extension candidates. Maximal degree in co-relation 9382. Up to 1146 conditions per place. [2024-06-27 20:21:34,889 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 228 selfloop transitions, 56 changer transitions 0/286 dead transitions. [2024-06-27 20:21:34,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 286 transitions, 3738 flow [2024-06-27 20:21:34,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-27 20:21:34,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-27 20:21:34,890 INFO L175 Difference]: Start difference. First operand has 342 places, 274 transitions, 3138 flow. Second operand 11 states and 122 transitions. [2024-06-27 20:21:34,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 286 transitions, 3738 flow [2024-06-27 20:21:35,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 286 transitions, 3492 flow, removed 65 selfloop flow, removed 11 redundant places. [2024-06-27 20:21:35,369 INFO L231 Difference]: Finished difference. Result has 343 places, 275 transitions, 3021 flow [2024-06-27 20:21:35,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2894, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3021, PETRI_PLACES=343, PETRI_TRANSITIONS=275} [2024-06-27 20:21:35,369 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 313 predicate places. [2024-06-27 20:21:35,369 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 275 transitions, 3021 flow [2024-06-27 20:21:35,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:35,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:35,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:35,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:21:35,369 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:35,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:35,370 INFO L85 PathProgramCache]: Analyzing trace with hash -645491538, now seen corresponding path program 30 times [2024-06-27 20:21:35,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:35,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334052439] [2024-06-27 20:21:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:35,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:36,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:36,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334052439] [2024-06-27 20:21:36,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334052439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:36,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:36,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:36,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194883733] [2024-06-27 20:21:36,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:36,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:36,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:36,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:36,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:36,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:36,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 275 transitions, 3021 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:36,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:36,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:36,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:36,907 INFO L124 PetriNetUnfolderBase]: 694/1284 cut-off events. [2024-06-27 20:21:36,907 INFO L125 PetriNetUnfolderBase]: For 203316/203316 co-relation queries the response was YES. [2024-06-27 20:21:36,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9814 conditions, 1284 events. 694/1284 cut-off events. For 203316/203316 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 7205 event pairs, 99 based on Foata normal form. 2/1284 useless extension candidates. Maximal degree in co-relation 9650. Up to 1188 conditions per place. [2024-06-27 20:21:36,921 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 256 selfloop transitions, 31 changer transitions 0/289 dead transitions. [2024-06-27 20:21:36,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 289 transitions, 3949 flow [2024-06-27 20:21:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:21:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:21:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-27 20:21:36,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-27 20:21:36,922 INFO L175 Difference]: Start difference. First operand has 343 places, 275 transitions, 3021 flow. Second operand 10 states and 111 transitions. [2024-06-27 20:21:36,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 289 transitions, 3949 flow [2024-06-27 20:21:37,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 289 transitions, 3831 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:21:37,497 INFO L231 Difference]: Finished difference. Result has 345 places, 277 transitions, 3065 flow [2024-06-27 20:21:37,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2909, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3065, PETRI_PLACES=345, PETRI_TRANSITIONS=277} [2024-06-27 20:21:37,497 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 315 predicate places. [2024-06-27 20:21:37,497 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 277 transitions, 3065 flow [2024-06-27 20:21:37,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:37,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:37,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:37,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:21:37,498 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:37,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:37,498 INFO L85 PathProgramCache]: Analyzing trace with hash 868457622, now seen corresponding path program 14 times [2024-06-27 20:21:37,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:37,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009867149] [2024-06-27 20:21:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:37,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:38,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:38,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009867149] [2024-06-27 20:21:38,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009867149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:38,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:38,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:38,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689422842] [2024-06-27 20:21:38,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:38,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:38,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:38,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:38,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:38,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:38,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 277 transitions, 3065 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:38,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:38,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:38,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:38,942 INFO L124 PetriNetUnfolderBase]: 690/1278 cut-off events. [2024-06-27 20:21:38,942 INFO L125 PetriNetUnfolderBase]: For 189361/189361 co-relation queries the response was YES. [2024-06-27 20:21:38,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9459 conditions, 1278 events. 690/1278 cut-off events. For 189361/189361 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 7192 event pairs, 96 based on Foata normal form. 2/1278 useless extension candidates. Maximal degree in co-relation 9294. Up to 1168 conditions per place. [2024-06-27 20:21:38,958 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 252 selfloop transitions, 36 changer transitions 0/290 dead transitions. [2024-06-27 20:21:38,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 290 transitions, 3669 flow [2024-06-27 20:21:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:38,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-27 20:21:38,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-27 20:21:38,959 INFO L175 Difference]: Start difference. First operand has 345 places, 277 transitions, 3065 flow. Second operand 11 states and 125 transitions. [2024-06-27 20:21:38,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 290 transitions, 3669 flow [2024-06-27 20:21:39,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 290 transitions, 3532 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 20:21:39,490 INFO L231 Difference]: Finished difference. Result has 351 places, 277 transitions, 3005 flow [2024-06-27 20:21:39,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2928, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3005, PETRI_PLACES=351, PETRI_TRANSITIONS=277} [2024-06-27 20:21:39,491 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 321 predicate places. [2024-06-27 20:21:39,491 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 277 transitions, 3005 flow [2024-06-27 20:21:39,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:39,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:39,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:39,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:21:39,491 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:39,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:39,491 INFO L85 PathProgramCache]: Analyzing trace with hash -417166494, now seen corresponding path program 4 times [2024-06-27 20:21:39,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:39,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067194364] [2024-06-27 20:21:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:39,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:40,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:40,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067194364] [2024-06-27 20:21:40,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067194364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:40,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:40,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:40,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304869664] [2024-06-27 20:21:40,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:40,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:40,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:40,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:40,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:40,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:40,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 277 transitions, 3005 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:40,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:40,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:40,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:40,856 INFO L124 PetriNetUnfolderBase]: 694/1286 cut-off events. [2024-06-27 20:21:40,856 INFO L125 PetriNetUnfolderBase]: For 190083/190083 co-relation queries the response was YES. [2024-06-27 20:21:40,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9384 conditions, 1286 events. 694/1286 cut-off events. For 190083/190083 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 7260 event pairs, 96 based on Foata normal form. 2/1286 useless extension candidates. Maximal degree in co-relation 9217. Up to 1252 conditions per place. [2024-06-27 20:21:40,870 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 271 selfloop transitions, 16 changer transitions 0/289 dead transitions. [2024-06-27 20:21:40,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 289 transitions, 3615 flow [2024-06-27 20:21:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:21:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:21:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-27 20:21:40,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-27 20:21:40,871 INFO L175 Difference]: Start difference. First operand has 351 places, 277 transitions, 3005 flow. Second operand 10 states and 106 transitions. [2024-06-27 20:21:40,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 289 transitions, 3615 flow [2024-06-27 20:21:41,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 289 transitions, 3517 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 20:21:41,444 INFO L231 Difference]: Finished difference. Result has 351 places, 278 transitions, 2957 flow [2024-06-27 20:21:41,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2907, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2957, PETRI_PLACES=351, PETRI_TRANSITIONS=278} [2024-06-27 20:21:41,444 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 321 predicate places. [2024-06-27 20:21:41,444 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 278 transitions, 2957 flow [2024-06-27 20:21:41,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:41,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:41,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:41,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:21:41,445 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:41,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:41,445 INFO L85 PathProgramCache]: Analyzing trace with hash -632230782, now seen corresponding path program 31 times [2024-06-27 20:21:41,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:41,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793827169] [2024-06-27 20:21:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:42,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:42,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793827169] [2024-06-27 20:21:42,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793827169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:42,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:42,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:42,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691473905] [2024-06-27 20:21:42,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:42,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:42,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:42,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:42,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:42,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:42,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 278 transitions, 2957 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:42,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:42,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:42,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:42,782 INFO L124 PetriNetUnfolderBase]: 711/1325 cut-off events. [2024-06-27 20:21:42,782 INFO L125 PetriNetUnfolderBase]: For 263703/263703 co-relation queries the response was YES. [2024-06-27 20:21:42,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9371 conditions, 1325 events. 711/1325 cut-off events. For 263703/263703 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7477 event pairs, 99 based on Foata normal form. 14/1337 useless extension candidates. Maximal degree in co-relation 9203. Up to 1215 conditions per place. [2024-06-27 20:21:42,798 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 265 selfloop transitions, 17 changer transitions 13/297 dead transitions. [2024-06-27 20:21:42,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 297 transitions, 3699 flow [2024-06-27 20:21:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-27 20:21:42,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-27 20:21:42,799 INFO L175 Difference]: Start difference. First operand has 351 places, 278 transitions, 2957 flow. Second operand 11 states and 125 transitions. [2024-06-27 20:21:42,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 297 transitions, 3699 flow [2024-06-27 20:21:43,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 297 transitions, 3607 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-27 20:21:43,321 INFO L231 Difference]: Finished difference. Result has 352 places, 272 transitions, 2836 flow [2024-06-27 20:21:43,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2836, PETRI_PLACES=352, PETRI_TRANSITIONS=272} [2024-06-27 20:21:43,321 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 322 predicate places. [2024-06-27 20:21:43,321 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 272 transitions, 2836 flow [2024-06-27 20:21:43,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:43,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:43,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:43,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:21:43,322 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:43,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:43,322 INFO L85 PathProgramCache]: Analyzing trace with hash 691205946, now seen corresponding path program 32 times [2024-06-27 20:21:43,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:43,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846641552] [2024-06-27 20:21:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:43,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:44,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:44,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846641552] [2024-06-27 20:21:44,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846641552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:44,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:44,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:44,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432404997] [2024-06-27 20:21:44,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:44,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:44,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:44,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:44,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:44,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:44,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 272 transitions, 2836 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:44,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:44,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:44,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:44,508 INFO L124 PetriNetUnfolderBase]: 677/1263 cut-off events. [2024-06-27 20:21:44,509 INFO L125 PetriNetUnfolderBase]: For 181308/181308 co-relation queries the response was YES. [2024-06-27 20:21:44,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8930 conditions, 1263 events. 677/1263 cut-off events. For 181308/181308 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 7157 event pairs, 93 based on Foata normal form. 2/1263 useless extension candidates. Maximal degree in co-relation 8763. Up to 1021 conditions per place. [2024-06-27 20:21:44,522 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 218 selfloop transitions, 67 changer transitions 0/287 dead transitions. [2024-06-27 20:21:44,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 287 transitions, 3724 flow [2024-06-27 20:21:44,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:44,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-27 20:21:44,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-27 20:21:44,523 INFO L175 Difference]: Start difference. First operand has 352 places, 272 transitions, 2836 flow. Second operand 11 states and 125 transitions. [2024-06-27 20:21:44,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 287 transitions, 3724 flow [2024-06-27 20:21:44,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 287 transitions, 3577 flow, removed 2 selfloop flow, removed 17 redundant places. [2024-06-27 20:21:45,000 INFO L231 Difference]: Finished difference. Result has 346 places, 273 transitions, 2873 flow [2024-06-27 20:21:45,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2689, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2873, PETRI_PLACES=346, PETRI_TRANSITIONS=273} [2024-06-27 20:21:45,000 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 316 predicate places. [2024-06-27 20:21:45,000 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 273 transitions, 2873 flow [2024-06-27 20:21:45,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:45,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:45,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:45,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:21:45,001 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:45,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:45,001 INFO L85 PathProgramCache]: Analyzing trace with hash 695789916, now seen corresponding path program 33 times [2024-06-27 20:21:45,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:45,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948588401] [2024-06-27 20:21:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:45,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:45,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:45,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948588401] [2024-06-27 20:21:45,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948588401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:45,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:45,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:45,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664117503] [2024-06-27 20:21:45,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:45,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:45,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:45,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:45,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:45,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:45,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 273 transitions, 2873 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:45,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:45,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:45,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:46,280 INFO L124 PetriNetUnfolderBase]: 681/1271 cut-off events. [2024-06-27 20:21:46,280 INFO L125 PetriNetUnfolderBase]: For 185238/185238 co-relation queries the response was YES. [2024-06-27 20:21:46,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9061 conditions, 1271 events. 681/1271 cut-off events. For 185238/185238 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7192 event pairs, 95 based on Foata normal form. 2/1271 useless extension candidates. Maximal degree in co-relation 8897. Up to 1173 conditions per place. [2024-06-27 20:21:46,293 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 249 selfloop transitions, 36 changer transitions 0/287 dead transitions. [2024-06-27 20:21:46,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 287 transitions, 3763 flow [2024-06-27 20:21:46,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-27 20:21:46,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-27 20:21:46,295 INFO L175 Difference]: Start difference. First operand has 346 places, 273 transitions, 2873 flow. Second operand 11 states and 123 transitions. [2024-06-27 20:21:46,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 287 transitions, 3763 flow [2024-06-27 20:21:46,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 287 transitions, 3501 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-06-27 20:21:46,808 INFO L231 Difference]: Finished difference. Result has 346 places, 274 transitions, 2735 flow [2024-06-27 20:21:46,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2735, PETRI_PLACES=346, PETRI_TRANSITIONS=274} [2024-06-27 20:21:46,808 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 316 predicate places. [2024-06-27 20:21:46,808 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 274 transitions, 2735 flow [2024-06-27 20:21:46,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:46,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:46,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:46,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:21:46,809 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:46,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:46,809 INFO L85 PathProgramCache]: Analyzing trace with hash -136147924, now seen corresponding path program 34 times [2024-06-27 20:21:46,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:46,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127981687] [2024-06-27 20:21:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:46,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:47,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:47,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127981687] [2024-06-27 20:21:47,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127981687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:47,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:47,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:47,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493741723] [2024-06-27 20:21:47,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:47,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:47,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:47,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:47,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:47,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:47,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 274 transitions, 2735 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:47,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:47,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:47,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:48,043 INFO L124 PetriNetUnfolderBase]: 688/1284 cut-off events. [2024-06-27 20:21:48,043 INFO L125 PetriNetUnfolderBase]: For 187597/187597 co-relation queries the response was YES. [2024-06-27 20:21:48,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8777 conditions, 1284 events. 688/1284 cut-off events. For 187597/187597 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 7310 event pairs, 97 based on Foata normal form. 2/1284 useless extension candidates. Maximal degree in co-relation 8615. Up to 1202 conditions per place. [2024-06-27 20:21:48,057 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 249 selfloop transitions, 37 changer transitions 0/288 dead transitions. [2024-06-27 20:21:48,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 288 transitions, 3393 flow [2024-06-27 20:21:48,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:48,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-27 20:21:48,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:21:48,058 INFO L175 Difference]: Start difference. First operand has 346 places, 274 transitions, 2735 flow. Second operand 11 states and 121 transitions. [2024-06-27 20:21:48,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 288 transitions, 3393 flow [2024-06-27 20:21:48,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 288 transitions, 3173 flow, removed 26 selfloop flow, removed 12 redundant places. [2024-06-27 20:21:48,570 INFO L231 Difference]: Finished difference. Result has 345 places, 277 transitions, 2657 flow [2024-06-27 20:21:48,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2657, PETRI_PLACES=345, PETRI_TRANSITIONS=277} [2024-06-27 20:21:48,570 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 315 predicate places. [2024-06-27 20:21:48,570 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 277 transitions, 2657 flow [2024-06-27 20:21:48,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:48,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:48,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:48,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:21:48,571 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:48,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:48,572 INFO L85 PathProgramCache]: Analyzing trace with hash 199711894, now seen corresponding path program 15 times [2024-06-27 20:21:48,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:48,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410369459] [2024-06-27 20:21:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:48,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:49,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:49,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410369459] [2024-06-27 20:21:49,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410369459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:49,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:49,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:49,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974679752] [2024-06-27 20:21:49,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:49,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:49,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:49,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:49,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:49,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:49,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 277 transitions, 2657 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:49,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:49,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:49,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:49,998 INFO L124 PetriNetUnfolderBase]: 684/1278 cut-off events. [2024-06-27 20:21:49,999 INFO L125 PetriNetUnfolderBase]: For 173929/173929 co-relation queries the response was YES. [2024-06-27 20:21:50,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8221 conditions, 1278 events. 684/1278 cut-off events. For 173929/173929 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 7265 event pairs, 96 based on Foata normal form. 2/1278 useless extension candidates. Maximal degree in co-relation 8061. Up to 1238 conditions per place. [2024-06-27 20:21:50,014 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 269 selfloop transitions, 18 changer transitions 0/289 dead transitions. [2024-06-27 20:21:50,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 289 transitions, 3257 flow [2024-06-27 20:21:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-27 20:21:50,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34017595307917886 [2024-06-27 20:21:50,015 INFO L175 Difference]: Start difference. First operand has 345 places, 277 transitions, 2657 flow. Second operand 11 states and 116 transitions. [2024-06-27 20:21:50,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 289 transitions, 3257 flow [2024-06-27 20:21:50,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 289 transitions, 3114 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-27 20:21:50,534 INFO L231 Difference]: Finished difference. Result has 347 places, 277 transitions, 2555 flow [2024-06-27 20:21:50,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2555, PETRI_PLACES=347, PETRI_TRANSITIONS=277} [2024-06-27 20:21:50,535 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 317 predicate places. [2024-06-27 20:21:50,535 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 277 transitions, 2555 flow [2024-06-27 20:21:50,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:50,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:50,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:50,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:21:50,537 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:50,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:50,537 INFO L85 PathProgramCache]: Analyzing trace with hash -135974944, now seen corresponding path program 35 times [2024-06-27 20:21:50,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:50,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725325218] [2024-06-27 20:21:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:50,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:51,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:51,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725325218] [2024-06-27 20:21:51,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725325218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:51,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:51,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:51,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395233268] [2024-06-27 20:21:51,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:51,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:51,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:51,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:51,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:51,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:51,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 277 transitions, 2555 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:51,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:51,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:51,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:51,906 INFO L124 PetriNetUnfolderBase]: 701/1317 cut-off events. [2024-06-27 20:21:51,906 INFO L125 PetriNetUnfolderBase]: For 252038/252038 co-relation queries the response was YES. [2024-06-27 20:21:51,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8105 conditions, 1317 events. 701/1317 cut-off events. For 252038/252038 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 7514 event pairs, 97 based on Foata normal form. 14/1329 useless extension candidates. Maximal degree in co-relation 7945. Up to 1157 conditions per place. [2024-06-27 20:21:51,922 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 249 selfloop transitions, 33 changer transitions 12/296 dead transitions. [2024-06-27 20:21:51,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 296 transitions, 3295 flow [2024-06-27 20:21:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-27 20:21:51,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-27 20:21:51,923 INFO L175 Difference]: Start difference. First operand has 347 places, 277 transitions, 2555 flow. Second operand 11 states and 130 transitions. [2024-06-27 20:21:51,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 296 transitions, 3295 flow [2024-06-27 20:21:52,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 296 transitions, 3155 flow, removed 37 selfloop flow, removed 10 redundant places. [2024-06-27 20:21:52,421 INFO L231 Difference]: Finished difference. Result has 348 places, 272 transitions, 2450 flow [2024-06-27 20:21:52,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2450, PETRI_PLACES=348, PETRI_TRANSITIONS=272} [2024-06-27 20:21:52,421 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 318 predicate places. [2024-06-27 20:21:52,421 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 272 transitions, 2450 flow [2024-06-27 20:21:52,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:52,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:52,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:52,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:21:52,422 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:52,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:52,422 INFO L85 PathProgramCache]: Analyzing trace with hash 485057842, now seen corresponding path program 5 times [2024-06-27 20:21:52,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:52,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310523762] [2024-06-27 20:21:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:52,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:53,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:53,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310523762] [2024-06-27 20:21:53,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310523762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:53,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:53,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:53,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471366675] [2024-06-27 20:21:53,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:53,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:53,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:53,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:53,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:53,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:53,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 272 transitions, 2450 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:53,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:53,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:53,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:53,817 INFO L124 PetriNetUnfolderBase]: 671/1259 cut-off events. [2024-06-27 20:21:53,817 INFO L125 PetriNetUnfolderBase]: For 160741/160741 co-relation queries the response was YES. [2024-06-27 20:21:53,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7648 conditions, 1259 events. 671/1259 cut-off events. For 160741/160741 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7140 event pairs, 88 based on Foata normal form. 2/1259 useless extension candidates. Maximal degree in co-relation 7487. Up to 1220 conditions per place. [2024-06-27 20:21:53,831 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 267 selfloop transitions, 16 changer transitions 0/285 dead transitions. [2024-06-27 20:21:53,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 285 transitions, 3056 flow [2024-06-27 20:21:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:21:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:21:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-27 20:21:53,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-27 20:21:53,832 INFO L175 Difference]: Start difference. First operand has 348 places, 272 transitions, 2450 flow. Second operand 10 states and 107 transitions. [2024-06-27 20:21:53,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 285 transitions, 3056 flow [2024-06-27 20:21:54,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 285 transitions, 2855 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-27 20:21:54,292 INFO L231 Difference]: Finished difference. Result has 346 places, 273 transitions, 2301 flow [2024-06-27 20:21:54,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2301, PETRI_PLACES=346, PETRI_TRANSITIONS=273} [2024-06-27 20:21:54,292 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 316 predicate places. [2024-06-27 20:21:54,292 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 273 transitions, 2301 flow [2024-06-27 20:21:54,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:54,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:54,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:54,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:21:54,293 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:54,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash 485048914, now seen corresponding path program 16 times [2024-06-27 20:21:54,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:54,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72942981] [2024-06-27 20:21:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:54,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:55,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:55,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72942981] [2024-06-27 20:21:55,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72942981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:55,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:55,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:55,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894928291] [2024-06-27 20:21:55,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:55,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:55,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:55,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:55,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:55,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:55,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 273 transitions, 2301 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:55,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:55,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:55,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:55,793 INFO L124 PetriNetUnfolderBase]: 667/1253 cut-off events. [2024-06-27 20:21:55,793 INFO L125 PetriNetUnfolderBase]: For 146960/146960 co-relation queries the response was YES. [2024-06-27 20:21:55,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7131 conditions, 1253 events. 667/1253 cut-off events. For 146960/146960 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7135 event pairs, 88 based on Foata normal form. 2/1253 useless extension candidates. Maximal degree in co-relation 6970. Up to 1204 conditions per place. [2024-06-27 20:21:55,806 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 266 selfloop transitions, 19 changer transitions 0/287 dead transitions. [2024-06-27 20:21:55,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 287 transitions, 2901 flow [2024-06-27 20:21:55,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-27 20:21:55,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-27 20:21:55,807 INFO L175 Difference]: Start difference. First operand has 346 places, 273 transitions, 2301 flow. Second operand 11 states and 118 transitions. [2024-06-27 20:21:55,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 287 transitions, 2901 flow [2024-06-27 20:21:56,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 287 transitions, 2805 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 20:21:56,261 INFO L231 Difference]: Finished difference. Result has 349 places, 273 transitions, 2248 flow [2024-06-27 20:21:56,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2248, PETRI_PLACES=349, PETRI_TRANSITIONS=273} [2024-06-27 20:21:56,262 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 319 predicate places. [2024-06-27 20:21:56,262 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 273 transitions, 2248 flow [2024-06-27 20:21:56,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:56,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:56,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:56,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:21:56,262 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:56,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:56,263 INFO L85 PathProgramCache]: Analyzing trace with hash -336409128, now seen corresponding path program 6 times [2024-06-27 20:21:56,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:56,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535100911] [2024-06-27 20:21:56,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:56,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:57,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:57,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535100911] [2024-06-27 20:21:57,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535100911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:57,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:57,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:57,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624181502] [2024-06-27 20:21:57,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:57,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:57,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:57,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:57,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:57,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:57,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 273 transitions, 2248 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:57,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:57,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:57,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:57,540 INFO L124 PetriNetUnfolderBase]: 664/1248 cut-off events. [2024-06-27 20:21:57,540 INFO L125 PetriNetUnfolderBase]: For 131514/131514 co-relation queries the response was YES. [2024-06-27 20:21:57,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6774 conditions, 1248 events. 664/1248 cut-off events. For 131514/131514 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7108 event pairs, 85 based on Foata normal form. 2/1248 useless extension candidates. Maximal degree in co-relation 6612. Up to 1209 conditions per place. [2024-06-27 20:21:57,554 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 268 selfloop transitions, 15 changer transitions 0/285 dead transitions. [2024-06-27 20:21:57,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 285 transitions, 2840 flow [2024-06-27 20:21:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:21:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:21:57,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-27 20:21:57,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-27 20:21:57,555 INFO L175 Difference]: Start difference. First operand has 349 places, 273 transitions, 2248 flow. Second operand 10 states and 105 transitions. [2024-06-27 20:21:57,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 285 transitions, 2840 flow [2024-06-27 20:21:57,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 285 transitions, 2726 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-27 20:21:57,863 INFO L231 Difference]: Finished difference. Result has 348 places, 273 transitions, 2168 flow [2024-06-27 20:21:57,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2134, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2168, PETRI_PLACES=348, PETRI_TRANSITIONS=273} [2024-06-27 20:21:57,864 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 318 predicate places. [2024-06-27 20:21:57,864 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 273 transitions, 2168 flow [2024-06-27 20:21:57,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:57,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:57,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:57,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:21:57,864 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:57,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:57,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1776592406, now seen corresponding path program 17 times [2024-06-27 20:21:57,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:57,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553480063] [2024-06-27 20:21:57,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:57,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:58,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:58,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553480063] [2024-06-27 20:21:58,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553480063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:58,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:58,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:58,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150887805] [2024-06-27 20:21:58,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:58,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:58,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:58,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:58,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:58,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:21:58,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 273 transitions, 2168 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:58,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:58,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:21:58,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:59,432 INFO L124 PetriNetUnfolderBase]: 660/1242 cut-off events. [2024-06-27 20:21:59,432 INFO L125 PetriNetUnfolderBase]: For 116818/116818 co-relation queries the response was YES. [2024-06-27 20:21:59,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6339 conditions, 1242 events. 660/1242 cut-off events. For 116818/116818 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7085 event pairs, 71 based on Foata normal form. 2/1242 useless extension candidates. Maximal degree in co-relation 6177. Up to 1017 conditions per place. [2024-06-27 20:21:59,446 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 238 selfloop transitions, 60 changer transitions 0/300 dead transitions. [2024-06-27 20:21:59,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 300 transitions, 2849 flow [2024-06-27 20:21:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:21:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:21:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-27 20:21:59,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897849462365591 [2024-06-27 20:21:59,446 INFO L175 Difference]: Start difference. First operand has 348 places, 273 transitions, 2168 flow. Second operand 12 states and 145 transitions. [2024-06-27 20:21:59,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 300 transitions, 2849 flow [2024-06-27 20:21:59,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 300 transitions, 2723 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-27 20:21:59,758 INFO L231 Difference]: Finished difference. Result has 352 places, 275 transitions, 2219 flow [2024-06-27 20:21:59,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2043, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2219, PETRI_PLACES=352, PETRI_TRANSITIONS=275} [2024-06-27 20:21:59,759 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 322 predicate places. [2024-06-27 20:21:59,759 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 275 transitions, 2219 flow [2024-06-27 20:21:59,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:59,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:59,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:59,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:21:59,759 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:21:59,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:59,759 INFO L85 PathProgramCache]: Analyzing trace with hash -903136630, now seen corresponding path program 1 times [2024-06-27 20:21:59,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:59,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436173214] [2024-06-27 20:21:59,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:59,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:00,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:00,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436173214] [2024-06-27 20:22:00,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436173214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:00,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:00,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:00,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742958568] [2024-06-27 20:22:00,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:00,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:00,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:00,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:00,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:00,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:00,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 275 transitions, 2219 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:00,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:00,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:00,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:01,300 INFO L124 PetriNetUnfolderBase]: 819/1554 cut-off events. [2024-06-27 20:22:01,300 INFO L125 PetriNetUnfolderBase]: For 249294/249294 co-relation queries the response was YES. [2024-06-27 20:22:01,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8919 conditions, 1554 events. 819/1554 cut-off events. For 249294/249294 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 9363 event pairs, 180 based on Foata normal form. 8/1560 useless extension candidates. Maximal degree in co-relation 8755. Up to 1204 conditions per place. [2024-06-27 20:22:01,318 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 307 selfloop transitions, 24 changer transitions 17/350 dead transitions. [2024-06-27 20:22:01,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 350 transitions, 3637 flow [2024-06-27 20:22:01,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 20:22:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 20:22:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 159 transitions. [2024-06-27 20:22:01,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3663594470046083 [2024-06-27 20:22:01,318 INFO L175 Difference]: Start difference. First operand has 352 places, 275 transitions, 2219 flow. Second operand 14 states and 159 transitions. [2024-06-27 20:22:01,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 350 transitions, 3637 flow [2024-06-27 20:22:01,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 350 transitions, 3450 flow, removed 30 selfloop flow, removed 13 redundant places. [2024-06-27 20:22:01,915 INFO L231 Difference]: Finished difference. Result has 359 places, 287 transitions, 2239 flow [2024-06-27 20:22:01,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2239, PETRI_PLACES=359, PETRI_TRANSITIONS=287} [2024-06-27 20:22:01,916 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 329 predicate places. [2024-06-27 20:22:01,916 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 287 transitions, 2239 flow [2024-06-27 20:22:01,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:01,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:01,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:01,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:22:01,916 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:01,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:01,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2066207478, now seen corresponding path program 2 times [2024-06-27 20:22:01,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:01,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418847473] [2024-06-27 20:22:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:01,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:02,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:02,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418847473] [2024-06-27 20:22:02,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418847473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:02,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:02,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:02,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022033999] [2024-06-27 20:22:02,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:02,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:02,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:02,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:02,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:03,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:03,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 287 transitions, 2239 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:03,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:03,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:03,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:03,652 INFO L124 PetriNetUnfolderBase]: 862/1648 cut-off events. [2024-06-27 20:22:03,652 INFO L125 PetriNetUnfolderBase]: For 468753/468755 co-relation queries the response was YES. [2024-06-27 20:22:03,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11824 conditions, 1648 events. 862/1648 cut-off events. For 468753/468755 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 9966 event pairs, 118 based on Foata normal form. 18/1664 useless extension candidates. Maximal degree in co-relation 11659. Up to 1130 conditions per place. [2024-06-27 20:22:03,672 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 258 selfloop transitions, 41 changer transitions 19/320 dead transitions. [2024-06-27 20:22:03,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 320 transitions, 3358 flow [2024-06-27 20:22:03,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 20:22:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 20:22:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 161 transitions. [2024-06-27 20:22:03,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-27 20:22:03,673 INFO L175 Difference]: Start difference. First operand has 359 places, 287 transitions, 2239 flow. Second operand 14 states and 161 transitions. [2024-06-27 20:22:03,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 320 transitions, 3358 flow [2024-06-27 20:22:04,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 320 transitions, 3296 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-27 20:22:04,696 INFO L231 Difference]: Finished difference. Result has 358 places, 275 transitions, 2173 flow [2024-06-27 20:22:04,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2179, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2173, PETRI_PLACES=358, PETRI_TRANSITIONS=275} [2024-06-27 20:22:04,696 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 328 predicate places. [2024-06-27 20:22:04,696 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 275 transitions, 2173 flow [2024-06-27 20:22:04,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:04,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:04,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:04,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:22:04,697 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:04,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:04,697 INFO L85 PathProgramCache]: Analyzing trace with hash -2066057748, now seen corresponding path program 3 times [2024-06-27 20:22:04,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:04,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851757117] [2024-06-27 20:22:04,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:04,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:05,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:05,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851757117] [2024-06-27 20:22:05,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851757117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:05,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:05,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:05,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247618071] [2024-06-27 20:22:05,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:05,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:05,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:05,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:05,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:05,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:05,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 275 transitions, 2173 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:05,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:05,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:05,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:06,287 INFO L124 PetriNetUnfolderBase]: 822/1576 cut-off events. [2024-06-27 20:22:06,287 INFO L125 PetriNetUnfolderBase]: For 505313/505315 co-relation queries the response was YES. [2024-06-27 20:22:06,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11895 conditions, 1576 events. 822/1576 cut-off events. For 505313/505315 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 9401 event pairs, 138 based on Foata normal form. 22/1596 useless extension candidates. Maximal degree in co-relation 11735. Up to 1340 conditions per place. [2024-06-27 20:22:06,302 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 251 selfloop transitions, 40 changer transitions 13/306 dead transitions. [2024-06-27 20:22:06,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 306 transitions, 2982 flow [2024-06-27 20:22:06,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:22:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:22:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 150 transitions. [2024-06-27 20:22:06,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37220843672456577 [2024-06-27 20:22:06,303 INFO L175 Difference]: Start difference. First operand has 358 places, 275 transitions, 2173 flow. Second operand 13 states and 150 transitions. [2024-06-27 20:22:06,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 306 transitions, 2982 flow [2024-06-27 20:22:07,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 306 transitions, 2886 flow, removed 5 selfloop flow, removed 18 redundant places. [2024-06-27 20:22:07,273 INFO L231 Difference]: Finished difference. Result has 347 places, 274 transitions, 2158 flow [2024-06-27 20:22:07,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2158, PETRI_PLACES=347, PETRI_TRANSITIONS=274} [2024-06-27 20:22:07,273 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 317 predicate places. [2024-06-27 20:22:07,273 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 274 transitions, 2158 flow [2024-06-27 20:22:07,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:07,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:07,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:07,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:22:07,274 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:07,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:07,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2066063328, now seen corresponding path program 4 times [2024-06-27 20:22:07,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:07,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405000115] [2024-06-27 20:22:07,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:07,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:08,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:08,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405000115] [2024-06-27 20:22:08,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405000115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:08,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:08,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:08,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845794030] [2024-06-27 20:22:08,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:08,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:08,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:08,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:08,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:08,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:08,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 274 transitions, 2158 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:08,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:08,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:08,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:08,986 INFO L124 PetriNetUnfolderBase]: 798/1536 cut-off events. [2024-06-27 20:22:08,986 INFO L125 PetriNetUnfolderBase]: For 440431/440433 co-relation queries the response was YES. [2024-06-27 20:22:08,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11385 conditions, 1536 events. 798/1536 cut-off events. For 440431/440433 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 9111 event pairs, 118 based on Foata normal form. 18/1552 useless extension candidates. Maximal degree in co-relation 11229. Up to 1130 conditions per place. [2024-06-27 20:22:09,000 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 251 selfloop transitions, 35 changer transitions 19/307 dead transitions. [2024-06-27 20:22:09,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 307 transitions, 3243 flow [2024-06-27 20:22:09,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 20:22:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 20:22:09,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 166 transitions. [2024-06-27 20:22:09,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35698924731182796 [2024-06-27 20:22:09,001 INFO L175 Difference]: Start difference. First operand has 347 places, 274 transitions, 2158 flow. Second operand 15 states and 166 transitions. [2024-06-27 20:22:09,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 307 transitions, 3243 flow [2024-06-27 20:22:10,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 307 transitions, 3159 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:22:10,026 INFO L231 Difference]: Finished difference. Result has 349 places, 260 transitions, 2023 flow [2024-06-27 20:22:10,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2076, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2023, PETRI_PLACES=349, PETRI_TRANSITIONS=260} [2024-06-27 20:22:10,027 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 319 predicate places. [2024-06-27 20:22:10,027 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 260 transitions, 2023 flow [2024-06-27 20:22:10,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:10,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:10,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:10,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:22:10,028 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:10,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:10,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1751701624, now seen corresponding path program 5 times [2024-06-27 20:22:10,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:10,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062798072] [2024-06-27 20:22:10,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:10,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:10,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:10,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062798072] [2024-06-27 20:22:10,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062798072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:10,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:10,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:10,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128058631] [2024-06-27 20:22:10,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:10,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:10,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:10,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:10,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:11,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:11,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 260 transitions, 2023 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:11,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:11,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:11,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:11,599 INFO L124 PetriNetUnfolderBase]: 724/1398 cut-off events. [2024-06-27 20:22:11,599 INFO L125 PetriNetUnfolderBase]: For 378691/378693 co-relation queries the response was YES. [2024-06-27 20:22:11,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9803 conditions, 1398 events. 724/1398 cut-off events. For 378691/378693 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8146 event pairs, 84 based on Foata normal form. 18/1414 useless extension candidates. Maximal degree in co-relation 9658. Up to 980 conditions per place. [2024-06-27 20:22:11,614 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 246 selfloop transitions, 24 changer transitions 21/293 dead transitions. [2024-06-27 20:22:11,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 293 transitions, 3080 flow [2024-06-27 20:22:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:22:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:22:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 153 transitions. [2024-06-27 20:22:11,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37965260545905705 [2024-06-27 20:22:11,615 INFO L175 Difference]: Start difference. First operand has 349 places, 260 transitions, 2023 flow. Second operand 13 states and 153 transitions. [2024-06-27 20:22:11,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 293 transitions, 3080 flow [2024-06-27 20:22:12,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 293 transitions, 2992 flow, removed 8 selfloop flow, removed 17 redundant places. [2024-06-27 20:22:12,294 INFO L231 Difference]: Finished difference. Result has 338 places, 248 transitions, 1914 flow [2024-06-27 20:22:12,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1914, PETRI_PLACES=338, PETRI_TRANSITIONS=248} [2024-06-27 20:22:12,295 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 308 predicate places. [2024-06-27 20:22:12,295 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 248 transitions, 1914 flow [2024-06-27 20:22:12,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:12,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:12,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:12,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:22:12,295 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:12,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:12,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1213792962, now seen corresponding path program 6 times [2024-06-27 20:22:12,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:12,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049376908] [2024-06-27 20:22:12,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:12,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:13,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:13,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049376908] [2024-06-27 20:22:13,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049376908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:13,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:13,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:13,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103395321] [2024-06-27 20:22:13,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:13,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:13,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:13,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:13,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:13,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:13,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 248 transitions, 1914 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:13,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:13,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:13,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:13,838 INFO L124 PetriNetUnfolderBase]: 684/1319 cut-off events. [2024-06-27 20:22:13,838 INFO L125 PetriNetUnfolderBase]: For 394329/394331 co-relation queries the response was YES. [2024-06-27 20:22:13,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9694 conditions, 1319 events. 684/1319 cut-off events. For 394329/394331 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 7561 event pairs, 104 based on Foata normal form. 22/1339 useless extension candidates. Maximal degree in co-relation 9552. Up to 1165 conditions per place. [2024-06-27 20:22:13,852 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 236 selfloop transitions, 18 changer transitions 18/274 dead transitions. [2024-06-27 20:22:13,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 274 transitions, 2651 flow [2024-06-27 20:22:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-27 20:22:13,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-27 20:22:13,853 INFO L175 Difference]: Start difference. First operand has 338 places, 248 transitions, 1914 flow. Second operand 12 states and 131 transitions. [2024-06-27 20:22:13,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 274 transitions, 2651 flow [2024-06-27 20:22:14,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 274 transitions, 2589 flow, removed 7 selfloop flow, removed 14 redundant places. [2024-06-27 20:22:14,491 INFO L231 Difference]: Finished difference. Result has 327 places, 244 transitions, 1864 flow [2024-06-27 20:22:14,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1856, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1864, PETRI_PLACES=327, PETRI_TRANSITIONS=244} [2024-06-27 20:22:14,492 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 297 predicate places. [2024-06-27 20:22:14,492 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 244 transitions, 1864 flow [2024-06-27 20:22:14,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:14,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:14,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:14,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:22:14,493 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:14,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:14,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1357683492, now seen corresponding path program 7 times [2024-06-27 20:22:14,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:14,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458788953] [2024-06-27 20:22:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:14,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:15,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:15,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458788953] [2024-06-27 20:22:15,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458788953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:15,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:15,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:15,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417988646] [2024-06-27 20:22:15,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:15,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:15,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:15,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:15,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:15,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:15,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 244 transitions, 1864 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:15,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:15,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:15,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:15,986 INFO L124 PetriNetUnfolderBase]: 676/1303 cut-off events. [2024-06-27 20:22:15,986 INFO L125 PetriNetUnfolderBase]: For 363599/363601 co-relation queries the response was YES. [2024-06-27 20:22:15,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9472 conditions, 1303 events. 676/1303 cut-off events. For 363599/363601 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7414 event pairs, 100 based on Foata normal form. 22/1323 useless extension candidates. Maximal degree in co-relation 9334. Up to 1119 conditions per place. [2024-06-27 20:22:16,001 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 231 selfloop transitions, 19 changer transitions 19/271 dead transitions. [2024-06-27 20:22:16,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 271 transitions, 2601 flow [2024-06-27 20:22:16,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:16,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-27 20:22:16,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-27 20:22:16,002 INFO L175 Difference]: Start difference. First operand has 327 places, 244 transitions, 1864 flow. Second operand 12 states and 135 transitions. [2024-06-27 20:22:16,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 271 transitions, 2601 flow [2024-06-27 20:22:16,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 271 transitions, 2537 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-27 20:22:16,604 INFO L231 Difference]: Finished difference. Result has 322 places, 239 transitions, 1813 flow [2024-06-27 20:22:16,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1813, PETRI_PLACES=322, PETRI_TRANSITIONS=239} [2024-06-27 20:22:16,605 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2024-06-27 20:22:16,605 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 239 transitions, 1813 flow [2024-06-27 20:22:16,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:16,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:16,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:16,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:22:16,605 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:16,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:16,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1537236116, now seen corresponding path program 8 times [2024-06-27 20:22:16,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:16,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805541415] [2024-06-27 20:22:16,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:16,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:17,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:17,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805541415] [2024-06-27 20:22:17,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805541415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:17,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:17,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:17,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487331815] [2024-06-27 20:22:17,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:17,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:17,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:17,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:17,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:17,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:17,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 239 transitions, 1813 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:17,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:17,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:17,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:18,058 INFO L124 PetriNetUnfolderBase]: 596/1143 cut-off events. [2024-06-27 20:22:18,058 INFO L125 PetriNetUnfolderBase]: For 220512/220514 co-relation queries the response was YES. [2024-06-27 20:22:18,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6019 conditions, 1143 events. 596/1143 cut-off events. For 220512/220514 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6399 event pairs, 66 based on Foata normal form. 22/1163 useless extension candidates. Maximal degree in co-relation 5884. Up to 989 conditions per place. [2024-06-27 20:22:18,068 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 225 selfloop transitions, 10 changer transitions 24/261 dead transitions. [2024-06-27 20:22:18,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 261 transitions, 2480 flow [2024-06-27 20:22:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 129 transitions. [2024-06-27 20:22:18,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-27 20:22:18,069 INFO L175 Difference]: Start difference. First operand has 322 places, 239 transitions, 1813 flow. Second operand 12 states and 129 transitions. [2024-06-27 20:22:18,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 261 transitions, 2480 flow [2024-06-27 20:22:18,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 261 transitions, 2438 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 20:22:18,305 INFO L231 Difference]: Finished difference. Result has 318 places, 227 transitions, 1696 flow [2024-06-27 20:22:18,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1696, PETRI_PLACES=318, PETRI_TRANSITIONS=227} [2024-06-27 20:22:18,305 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 288 predicate places. [2024-06-27 20:22:18,305 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 227 transitions, 1696 flow [2024-06-27 20:22:18,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:18,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:18,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:18,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:22:18,306 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:18,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:18,306 INFO L85 PathProgramCache]: Analyzing trace with hash -697395838, now seen corresponding path program 9 times [2024-06-27 20:22:18,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:18,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117804048] [2024-06-27 20:22:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:18,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:19,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:19,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117804048] [2024-06-27 20:22:19,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117804048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:19,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:19,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:19,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779734794] [2024-06-27 20:22:19,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:19,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:19,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:19,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:19,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:19,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:19,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 227 transitions, 1696 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:19,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:19,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:19,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:19,675 INFO L124 PetriNetUnfolderBase]: 579/1106 cut-off events. [2024-06-27 20:22:19,675 INFO L125 PetriNetUnfolderBase]: For 201898/201898 co-relation queries the response was YES. [2024-06-27 20:22:19,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6933 conditions, 1106 events. 579/1106 cut-off events. For 201898/201898 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 6075 event pairs, 73 based on Foata normal form. 8/1112 useless extension candidates. Maximal degree in co-relation 6799. Up to 774 conditions per place. [2024-06-27 20:22:19,684 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 186 selfloop transitions, 60 changer transitions 7/255 dead transitions. [2024-06-27 20:22:19,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 255 transitions, 2632 flow [2024-06-27 20:22:19,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:19,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:19,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 154 transitions. [2024-06-27 20:22:19,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41397849462365593 [2024-06-27 20:22:19,684 INFO L175 Difference]: Start difference. First operand has 318 places, 227 transitions, 1696 flow. Second operand 12 states and 154 transitions. [2024-06-27 20:22:19,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 255 transitions, 2632 flow [2024-06-27 20:22:20,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 255 transitions, 2540 flow, removed 27 selfloop flow, removed 12 redundant places. [2024-06-27 20:22:20,044 INFO L231 Difference]: Finished difference. Result has 300 places, 225 transitions, 1742 flow [2024-06-27 20:22:20,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1742, PETRI_PLACES=300, PETRI_TRANSITIONS=225} [2024-06-27 20:22:20,045 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 270 predicate places. [2024-06-27 20:22:20,045 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 225 transitions, 1742 flow [2024-06-27 20:22:20,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:20,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:20,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:20,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:22:20,045 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:20,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:20,045 INFO L85 PathProgramCache]: Analyzing trace with hash -697390258, now seen corresponding path program 10 times [2024-06-27 20:22:20,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:20,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348357662] [2024-06-27 20:22:20,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:20,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:20,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:20,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348357662] [2024-06-27 20:22:20,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348357662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:20,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:20,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:20,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237563525] [2024-06-27 20:22:20,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:20,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:20,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:20,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:20,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:21,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:21,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 225 transitions, 1742 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:21,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:21,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:21,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:21,554 INFO L124 PetriNetUnfolderBase]: 564/1081 cut-off events. [2024-06-27 20:22:21,554 INFO L125 PetriNetUnfolderBase]: For 198406/198406 co-relation queries the response was YES. [2024-06-27 20:22:21,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5650 conditions, 1081 events. 564/1081 cut-off events. For 198406/198406 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 5961 event pairs, 76 based on Foata normal form. 20/1099 useless extension candidates. Maximal degree in co-relation 5522. Up to 790 conditions per place. [2024-06-27 20:22:21,565 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 179 selfloop transitions, 52 changer transitions 15/248 dead transitions. [2024-06-27 20:22:21,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 248 transitions, 2370 flow [2024-06-27 20:22:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:22:21,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:22:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 155 transitions. [2024-06-27 20:22:21,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-27 20:22:21,566 INFO L175 Difference]: Start difference. First operand has 300 places, 225 transitions, 1742 flow. Second operand 13 states and 155 transitions. [2024-06-27 20:22:21,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 248 transitions, 2370 flow [2024-06-27 20:22:21,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 248 transitions, 2248 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:22:21,842 INFO L231 Difference]: Finished difference. Result has 300 places, 218 transitions, 1690 flow [2024-06-27 20:22:21,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1690, PETRI_PLACES=300, PETRI_TRANSITIONS=218} [2024-06-27 20:22:21,842 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 270 predicate places. [2024-06-27 20:22:21,842 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 218 transitions, 1690 flow [2024-06-27 20:22:21,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:21,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:21,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:21,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:22:21,842 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:21,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:21,843 INFO L85 PathProgramCache]: Analyzing trace with hash -379459214, now seen corresponding path program 11 times [2024-06-27 20:22:21,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:21,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684433172] [2024-06-27 20:22:21,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:21,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:22,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:22,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684433172] [2024-06-27 20:22:22,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684433172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:22,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:22,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:22,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950715729] [2024-06-27 20:22:22,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:22,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:22,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:22,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:22,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:22,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 218 transitions, 1690 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:22,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:22,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:22,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:23,252 INFO L124 PetriNetUnfolderBase]: 556/1069 cut-off events. [2024-06-27 20:22:23,252 INFO L125 PetriNetUnfolderBase]: For 180427/180427 co-relation queries the response was YES. [2024-06-27 20:22:23,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6653 conditions, 1069 events. 556/1069 cut-off events. For 180427/180427 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 5868 event pairs, 85 based on Foata normal form. 8/1075 useless extension candidates. Maximal degree in co-relation 6526. Up to 746 conditions per place. [2024-06-27 20:22:23,262 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 183 selfloop transitions, 48 changer transitions 12/245 dead transitions. [2024-06-27 20:22:23,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 245 transitions, 2578 flow [2024-06-27 20:22:23,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-27 20:22:23,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-27 20:22:23,264 INFO L175 Difference]: Start difference. First operand has 300 places, 218 transitions, 1690 flow. Second operand 12 states and 150 transitions. [2024-06-27 20:22:23,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 245 transitions, 2578 flow [2024-06-27 20:22:23,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 245 transitions, 2462 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-27 20:22:23,634 INFO L231 Difference]: Finished difference. Result has 293 places, 213 transitions, 1646 flow [2024-06-27 20:22:23,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1646, PETRI_PLACES=293, PETRI_TRANSITIONS=213} [2024-06-27 20:22:23,635 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 263 predicate places. [2024-06-27 20:22:23,635 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 213 transitions, 1646 flow [2024-06-27 20:22:23,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:23,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:23,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:23,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:22:23,635 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:23,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:23,636 INFO L85 PathProgramCache]: Analyzing trace with hash -692033458, now seen corresponding path program 12 times [2024-06-27 20:22:23,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:23,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726332680] [2024-06-27 20:22:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:23,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:24,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:24,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726332680] [2024-06-27 20:22:24,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726332680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:24,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:24,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:24,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573847392] [2024-06-27 20:22:24,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:24,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:24,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:24,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:24,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:24,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:24,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 213 transitions, 1646 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:24,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:24,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:24,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:25,057 INFO L124 PetriNetUnfolderBase]: 543/1046 cut-off events. [2024-06-27 20:22:25,057 INFO L125 PetriNetUnfolderBase]: For 173751/173751 co-relation queries the response was YES. [2024-06-27 20:22:25,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6523 conditions, 1046 events. 543/1046 cut-off events. For 173751/173751 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 5723 event pairs, 85 based on Foata normal form. 8/1052 useless extension candidates. Maximal degree in co-relation 6398. Up to 832 conditions per place. [2024-06-27 20:22:25,067 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 175 selfloop transitions, 40 changer transitions 16/233 dead transitions. [2024-06-27 20:22:25,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 233 transitions, 2188 flow [2024-06-27 20:22:25,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-27 20:22:25,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-27 20:22:25,068 INFO L175 Difference]: Start difference. First operand has 293 places, 213 transitions, 1646 flow. Second operand 12 states and 140 transitions. [2024-06-27 20:22:25,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 233 transitions, 2188 flow [2024-06-27 20:22:25,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 233 transitions, 2086 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-27 20:22:25,445 INFO L231 Difference]: Finished difference. Result has 288 places, 206 transitions, 1579 flow [2024-06-27 20:22:25,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1579, PETRI_PLACES=288, PETRI_TRANSITIONS=206} [2024-06-27 20:22:25,446 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2024-06-27 20:22:25,446 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 206 transitions, 1579 flow [2024-06-27 20:22:25,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:25,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:25,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:25,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:22:25,446 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:25,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:25,446 INFO L85 PathProgramCache]: Analyzing trace with hash -172379338, now seen corresponding path program 1 times [2024-06-27 20:22:25,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:25,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623306477] [2024-06-27 20:22:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:25,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:26,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:26,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623306477] [2024-06-27 20:22:26,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623306477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:26,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:26,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:26,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800753634] [2024-06-27 20:22:26,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:26,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:26,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:26,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:26,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:26,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:26,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 206 transitions, 1579 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:26,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:26,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:26,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:26,879 INFO L124 PetriNetUnfolderBase]: 528/1009 cut-off events. [2024-06-27 20:22:26,879 INFO L125 PetriNetUnfolderBase]: For 132725/132725 co-relation queries the response was YES. [2024-06-27 20:22:26,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6294 conditions, 1009 events. 528/1009 cut-off events. For 132725/132725 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 5448 event pairs, 78 based on Foata normal form. 2/1009 useless extension candidates. Maximal degree in co-relation 6172. Up to 817 conditions per place. [2024-06-27 20:22:26,887 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 179 selfloop transitions, 48 changer transitions 0/229 dead transitions. [2024-06-27 20:22:26,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 229 transitions, 2121 flow [2024-06-27 20:22:26,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:22:26,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:22:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-27 20:22:26,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-27 20:22:26,887 INFO L175 Difference]: Start difference. First operand has 288 places, 206 transitions, 1579 flow. Second operand 11 states and 129 transitions. [2024-06-27 20:22:26,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 229 transitions, 2121 flow [2024-06-27 20:22:27,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 229 transitions, 2031 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-27 20:22:27,269 INFO L231 Difference]: Finished difference. Result has 281 places, 212 transitions, 1682 flow [2024-06-27 20:22:27,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1682, PETRI_PLACES=281, PETRI_TRANSITIONS=212} [2024-06-27 20:22:27,270 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2024-06-27 20:22:27,270 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 212 transitions, 1682 flow [2024-06-27 20:22:27,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:27,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:27,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:27,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:22:27,271 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:27,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:27,271 INFO L85 PathProgramCache]: Analyzing trace with hash -498088468, now seen corresponding path program 13 times [2024-06-27 20:22:27,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:27,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491695194] [2024-06-27 20:22:27,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:27,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:28,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:28,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491695194] [2024-06-27 20:22:28,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491695194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:28,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:28,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:28,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535619814] [2024-06-27 20:22:28,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:28,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:28,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:28,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:28,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:28,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:28,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 212 transitions, 1682 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:28,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:28,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:28,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:28,724 INFO L124 PetriNetUnfolderBase]: 537/1032 cut-off events. [2024-06-27 20:22:28,724 INFO L125 PetriNetUnfolderBase]: For 152087/152087 co-relation queries the response was YES. [2024-06-27 20:22:28,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6230 conditions, 1032 events. 537/1032 cut-off events. For 152087/152087 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 5616 event pairs, 86 based on Foata normal form. 10/1040 useless extension candidates. Maximal degree in co-relation 6110. Up to 794 conditions per place. [2024-06-27 20:22:28,734 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 168 selfloop transitions, 52 changer transitions 11/233 dead transitions. [2024-06-27 20:22:28,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 233 transitions, 2282 flow [2024-06-27 20:22:28,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-27 20:22:28,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-27 20:22:28,734 INFO L175 Difference]: Start difference. First operand has 281 places, 212 transitions, 1682 flow. Second operand 12 states and 144 transitions. [2024-06-27 20:22:28,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 233 transitions, 2282 flow [2024-06-27 20:22:29,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 233 transitions, 2216 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:22:29,038 INFO L231 Difference]: Finished difference. Result has 286 places, 209 transitions, 1705 flow [2024-06-27 20:22:29,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1705, PETRI_PLACES=286, PETRI_TRANSITIONS=209} [2024-06-27 20:22:29,038 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2024-06-27 20:22:29,038 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 209 transitions, 1705 flow [2024-06-27 20:22:29,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:29,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:29,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:29,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:22:29,039 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:29,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:29,039 INFO L85 PathProgramCache]: Analyzing trace with hash -498094048, now seen corresponding path program 14 times [2024-06-27 20:22:29,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:29,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092080434] [2024-06-27 20:22:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:29,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:29,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:29,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092080434] [2024-06-27 20:22:29,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092080434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:29,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:29,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:29,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217052491] [2024-06-27 20:22:29,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:29,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:29,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:29,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:29,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:30,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:30,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 209 transitions, 1705 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:30,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:30,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:30,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:30,386 INFO L124 PetriNetUnfolderBase]: 503/966 cut-off events. [2024-06-27 20:22:30,386 INFO L125 PetriNetUnfolderBase]: For 103342/103342 co-relation queries the response was YES. [2024-06-27 20:22:30,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5069 conditions, 966 events. 503/966 cut-off events. For 103342/103342 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5226 event pairs, 64 based on Foata normal form. 8/972 useless extension candidates. Maximal degree in co-relation 4948. Up to 764 conditions per place. [2024-06-27 20:22:30,395 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 173 selfloop transitions, 39 changer transitions 15/229 dead transitions. [2024-06-27 20:22:30,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 229 transitions, 2245 flow [2024-06-27 20:22:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:30,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-27 20:22:30,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-27 20:22:30,396 INFO L175 Difference]: Start difference. First operand has 286 places, 209 transitions, 1705 flow. Second operand 12 states and 139 transitions. [2024-06-27 20:22:30,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 229 transitions, 2245 flow [2024-06-27 20:22:30,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 229 transitions, 2137 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:22:30,579 INFO L231 Difference]: Finished difference. Result has 284 places, 203 transitions, 1634 flow [2024-06-27 20:22:30,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1634, PETRI_PLACES=284, PETRI_TRANSITIONS=203} [2024-06-27 20:22:30,580 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2024-06-27 20:22:30,580 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 203 transitions, 1634 flow [2024-06-27 20:22:30,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:30,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:30,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:30,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:22:30,580 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:30,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1376123098, now seen corresponding path program 15 times [2024-06-27 20:22:30,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:30,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759571451] [2024-06-27 20:22:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:30,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:31,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:31,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759571451] [2024-06-27 20:22:31,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759571451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:31,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:31,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:31,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510019034] [2024-06-27 20:22:31,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:31,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:31,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:31,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:31,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:31,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:31,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 203 transitions, 1634 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:31,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:31,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:31,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:32,048 INFO L124 PetriNetUnfolderBase]: 521/1004 cut-off events. [2024-06-27 20:22:32,048 INFO L125 PetriNetUnfolderBase]: For 153003/153003 co-relation queries the response was YES. [2024-06-27 20:22:32,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6344 conditions, 1004 events. 521/1004 cut-off events. For 153003/153003 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5433 event pairs, 71 based on Foata normal form. 8/1010 useless extension candidates. Maximal degree in co-relation 6224. Up to 673 conditions per place. [2024-06-27 20:22:32,058 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 162 selfloop transitions, 59 changer transitions 7/230 dead transitions. [2024-06-27 20:22:32,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 230 transitions, 2484 flow [2024-06-27 20:22:32,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:32,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 155 transitions. [2024-06-27 20:22:32,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:22:32,059 INFO L175 Difference]: Start difference. First operand has 284 places, 203 transitions, 1634 flow. Second operand 12 states and 155 transitions. [2024-06-27 20:22:32,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 230 transitions, 2484 flow [2024-06-27 20:22:32,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 230 transitions, 2384 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-27 20:22:32,400 INFO L231 Difference]: Finished difference. Result has 276 places, 201 transitions, 1650 flow [2024-06-27 20:22:32,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1650, PETRI_PLACES=276, PETRI_TRANSITIONS=201} [2024-06-27 20:22:32,400 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 246 predicate places. [2024-06-27 20:22:32,401 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 201 transitions, 1650 flow [2024-06-27 20:22:32,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:32,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:32,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:32,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:22:32,402 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:32,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:32,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1550307762, now seen corresponding path program 16 times [2024-06-27 20:22:32,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:32,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435102788] [2024-06-27 20:22:32,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:32,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:33,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:33,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435102788] [2024-06-27 20:22:33,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435102788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:33,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:33,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:33,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51152289] [2024-06-27 20:22:33,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:33,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:33,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:33,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:33,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:33,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:33,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 201 transitions, 1650 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:33,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:33,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:33,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:33,888 INFO L124 PetriNetUnfolderBase]: 519/1002 cut-off events. [2024-06-27 20:22:33,889 INFO L125 PetriNetUnfolderBase]: For 156042/156042 co-relation queries the response was YES. [2024-06-27 20:22:33,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6397 conditions, 1002 events. 519/1002 cut-off events. For 156042/156042 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5406 event pairs, 85 based on Foata normal form. 10/1010 useless extension candidates. Maximal degree in co-relation 6280. Up to 757 conditions per place. [2024-06-27 20:22:33,896 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 157 selfloop transitions, 49 changer transitions 14/222 dead transitions. [2024-06-27 20:22:33,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 222 transitions, 2228 flow [2024-06-27 20:22:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:33,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-27 20:22:33,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-27 20:22:33,896 INFO L175 Difference]: Start difference. First operand has 276 places, 201 transitions, 1650 flow. Second operand 12 states and 144 transitions. [2024-06-27 20:22:33,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 222 transitions, 2228 flow [2024-06-27 20:22:34,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 222 transitions, 2108 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:22:34,225 INFO L231 Difference]: Finished difference. Result has 275 places, 195 transitions, 1598 flow [2024-06-27 20:22:34,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1598, PETRI_PLACES=275, PETRI_TRANSITIONS=195} [2024-06-27 20:22:34,225 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2024-06-27 20:22:34,225 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 195 transitions, 1598 flow [2024-06-27 20:22:34,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:34,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:34,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:34,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:22:34,226 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:34,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:34,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1697922942, now seen corresponding path program 17 times [2024-06-27 20:22:34,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:34,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094596393] [2024-06-27 20:22:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:34,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:35,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:35,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094596393] [2024-06-27 20:22:35,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094596393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:35,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:35,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:35,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994671849] [2024-06-27 20:22:35,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:35,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:35,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:35,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:35,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:35,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:35,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 195 transitions, 1598 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:35,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:35,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:35,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:35,634 INFO L124 PetriNetUnfolderBase]: 528/1029 cut-off events. [2024-06-27 20:22:35,634 INFO L125 PetriNetUnfolderBase]: For 189138/189138 co-relation queries the response was YES. [2024-06-27 20:22:35,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7508 conditions, 1029 events. 528/1029 cut-off events. For 189138/189138 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5592 event pairs, 92 based on Foata normal form. 8/1035 useless extension candidates. Maximal degree in co-relation 7392. Up to 597 conditions per place. [2024-06-27 20:22:35,643 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 164 selfloop transitions, 44 changer transitions 13/223 dead transitions. [2024-06-27 20:22:35,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 223 transitions, 2426 flow [2024-06-27 20:22:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 153 transitions. [2024-06-27 20:22:35,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2024-06-27 20:22:35,644 INFO L175 Difference]: Start difference. First operand has 275 places, 195 transitions, 1598 flow. Second operand 12 states and 153 transitions. [2024-06-27 20:22:35,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 223 transitions, 2426 flow [2024-06-27 20:22:36,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 223 transitions, 2316 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-27 20:22:36,116 INFO L231 Difference]: Finished difference. Result has 271 places, 191 transitions, 1566 flow [2024-06-27 20:22:36,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1566, PETRI_PLACES=271, PETRI_TRANSITIONS=191} [2024-06-27 20:22:36,116 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 241 predicate places. [2024-06-27 20:22:36,116 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 191 transitions, 1566 flow [2024-06-27 20:22:36,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:36,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:36,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:36,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:22:36,117 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:36,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:36,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1694198292, now seen corresponding path program 18 times [2024-06-27 20:22:36,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:36,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25230471] [2024-06-27 20:22:36,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:36,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:37,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:37,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25230471] [2024-06-27 20:22:37,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25230471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:37,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:37,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:37,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163933648] [2024-06-27 20:22:37,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:37,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:37,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:37,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:37,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:37,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:37,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 191 transitions, 1566 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:37,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:37,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:37,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:37,652 INFO L124 PetriNetUnfolderBase]: 498/975 cut-off events. [2024-06-27 20:22:37,652 INFO L125 PetriNetUnfolderBase]: For 180980/180980 co-relation queries the response was YES. [2024-06-27 20:22:37,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6022 conditions, 975 events. 498/975 cut-off events. For 180980/180980 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5258 event pairs, 86 based on Foata normal form. 20/993 useless extension candidates. Maximal degree in co-relation 5908. Up to 701 conditions per place. [2024-06-27 20:22:37,660 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 151 selfloop transitions, 46 changer transitions 15/214 dead transitions. [2024-06-27 20:22:37,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 214 transitions, 2132 flow [2024-06-27 20:22:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 20:22:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 20:22:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 159 transitions. [2024-06-27 20:22:37,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3663594470046083 [2024-06-27 20:22:37,660 INFO L175 Difference]: Start difference. First operand has 271 places, 191 transitions, 1566 flow. Second operand 14 states and 159 transitions. [2024-06-27 20:22:37,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 214 transitions, 2132 flow [2024-06-27 20:22:37,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 214 transitions, 2045 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-27 20:22:37,929 INFO L231 Difference]: Finished difference. Result has 268 places, 184 transitions, 1532 flow [2024-06-27 20:22:37,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1532, PETRI_PLACES=268, PETRI_TRANSITIONS=184} [2024-06-27 20:22:37,929 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-06-27 20:22:37,929 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 184 transitions, 1532 flow [2024-06-27 20:22:37,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:37,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:37,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:37,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 20:22:37,930 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:37,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:37,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1694348022, now seen corresponding path program 19 times [2024-06-27 20:22:37,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:37,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993037178] [2024-06-27 20:22:37,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:37,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:38,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:38,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993037178] [2024-06-27 20:22:38,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993037178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:38,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:38,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:38,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096997405] [2024-06-27 20:22:38,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:38,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:38,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:38,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:38,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:38,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:38,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 184 transitions, 1532 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:38,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:38,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:38,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:39,305 INFO L124 PetriNetUnfolderBase]: 461/904 cut-off events. [2024-06-27 20:22:39,305 INFO L125 PetriNetUnfolderBase]: For 117268/117268 co-relation queries the response was YES. [2024-06-27 20:22:39,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5513 conditions, 904 events. 461/904 cut-off events. For 117268/117268 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4786 event pairs, 74 based on Foata normal form. 8/910 useless extension candidates. Maximal degree in co-relation 5402. Up to 657 conditions per place. [2024-06-27 20:22:39,312 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 142 selfloop transitions, 46 changer transitions 16/206 dead transitions. [2024-06-27 20:22:39,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 206 transitions, 2030 flow [2024-06-27 20:22:39,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:22:39,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:22:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 152 transitions. [2024-06-27 20:22:39,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3771712158808933 [2024-06-27 20:22:39,313 INFO L175 Difference]: Start difference. First operand has 268 places, 184 transitions, 1532 flow. Second operand 13 states and 152 transitions. [2024-06-27 20:22:39,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 206 transitions, 2030 flow [2024-06-27 20:22:39,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 206 transitions, 1922 flow, removed 5 selfloop flow, removed 15 redundant places. [2024-06-27 20:22:39,521 INFO L231 Difference]: Finished difference. Result has 260 places, 178 transitions, 1481 flow [2024-06-27 20:22:39,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1481, PETRI_PLACES=260, PETRI_TRANSITIONS=178} [2024-06-27 20:22:39,522 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 230 predicate places. [2024-06-27 20:22:39,522 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 178 transitions, 1481 flow [2024-06-27 20:22:39,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:39,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:39,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:39,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 20:22:39,522 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:39,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:39,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1237739098, now seen corresponding path program 20 times [2024-06-27 20:22:39,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:39,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951614032] [2024-06-27 20:22:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:39,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:40,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:40,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951614032] [2024-06-27 20:22:40,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951614032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:40,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:40,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:40,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47225609] [2024-06-27 20:22:40,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:40,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:40,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:40,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:40,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:40,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:40,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 178 transitions, 1481 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:40,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:40,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:40,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:40,873 INFO L124 PetriNetUnfolderBase]: 447/878 cut-off events. [2024-06-27 20:22:40,873 INFO L125 PetriNetUnfolderBase]: For 109974/109974 co-relation queries the response was YES. [2024-06-27 20:22:40,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5354 conditions, 878 events. 447/878 cut-off events. For 109974/109974 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4638 event pairs, 74 based on Foata normal form. 8/884 useless extension candidates. Maximal degree in co-relation 5246. Up to 597 conditions per place. [2024-06-27 20:22:40,880 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 153 selfloop transitions, 38 changer transitions 10/203 dead transitions. [2024-06-27 20:22:40,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 203 transitions, 2197 flow [2024-06-27 20:22:40,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-27 20:22:40,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897849462365591 [2024-06-27 20:22:40,881 INFO L175 Difference]: Start difference. First operand has 260 places, 178 transitions, 1481 flow. Second operand 12 states and 145 transitions. [2024-06-27 20:22:40,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 203 transitions, 2197 flow [2024-06-27 20:22:41,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 203 transitions, 2084 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-27 20:22:41,087 INFO L231 Difference]: Finished difference. Result has 252 places, 175 transitions, 1437 flow [2024-06-27 20:22:41,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1437, PETRI_PLACES=252, PETRI_TRANSITIONS=175} [2024-06-27 20:22:41,088 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 222 predicate places. [2024-06-27 20:22:41,088 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 175 transitions, 1437 flow [2024-06-27 20:22:41,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:41,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:41,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:41,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 20:22:41,088 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:41,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:41,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1232232568, now seen corresponding path program 21 times [2024-06-27 20:22:41,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:41,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984347011] [2024-06-27 20:22:41,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:41,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:42,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:42,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984347011] [2024-06-27 20:22:42,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984347011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:42,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:42,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:42,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801734729] [2024-06-27 20:22:42,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:42,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:42,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:42,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:42,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:42,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:42,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 175 transitions, 1437 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:42,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:42,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:42,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:42,525 INFO L124 PetriNetUnfolderBase]: 437/860 cut-off events. [2024-06-27 20:22:42,525 INFO L125 PetriNetUnfolderBase]: For 105142/105142 co-relation queries the response was YES. [2024-06-27 20:22:42,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5228 conditions, 860 events. 437/860 cut-off events. For 105142/105142 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4507 event pairs, 74 based on Foata normal form. 8/866 useless extension candidates. Maximal degree in co-relation 5122. Up to 661 conditions per place. [2024-06-27 20:22:42,531 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 144 selfloop transitions, 33 changer transitions 16/195 dead transitions. [2024-06-27 20:22:42,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 195 transitions, 1909 flow [2024-06-27 20:22:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-27 20:22:42,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-27 20:22:42,532 INFO L175 Difference]: Start difference. First operand has 252 places, 175 transitions, 1437 flow. Second operand 12 states and 138 transitions. [2024-06-27 20:22:42,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 195 transitions, 1909 flow [2024-06-27 20:22:42,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 195 transitions, 1830 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 20:22:42,699 INFO L231 Difference]: Finished difference. Result has 249 places, 168 transitions, 1375 flow [2024-06-27 20:22:42,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1375, PETRI_PLACES=249, PETRI_TRANSITIONS=168} [2024-06-27 20:22:42,699 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-27 20:22:42,700 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 168 transitions, 1375 flow [2024-06-27 20:22:42,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:42,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:42,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:42,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 20:22:42,700 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:42,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:42,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1555675722, now seen corresponding path program 22 times [2024-06-27 20:22:42,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:42,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568685513] [2024-06-27 20:22:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:42,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:43,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:43,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568685513] [2024-06-27 20:22:43,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568685513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:43,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:43,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:43,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001640786] [2024-06-27 20:22:43,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:43,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:43,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:43,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:43,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:43,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:43,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 168 transitions, 1375 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:43,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:43,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:43,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:43,993 INFO L124 PetriNetUnfolderBase]: 403/790 cut-off events. [2024-06-27 20:22:43,994 INFO L125 PetriNetUnfolderBase]: For 72236/72236 co-relation queries the response was YES. [2024-06-27 20:22:43,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4190 conditions, 790 events. 403/790 cut-off events. For 72236/72236 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4057 event pairs, 56 based on Foata normal form. 8/796 useless extension candidates. Maximal degree in co-relation 4086. Up to 571 conditions per place. [2024-06-27 20:22:44,000 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 131 selfloop transitions, 35 changer transitions 20/188 dead transitions. [2024-06-27 20:22:44,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 188 transitions, 1833 flow [2024-06-27 20:22:44,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-27 20:22:44,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-27 20:22:44,005 INFO L175 Difference]: Start difference. First operand has 249 places, 168 transitions, 1375 flow. Second operand 12 states and 139 transitions. [2024-06-27 20:22:44,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 188 transitions, 1833 flow [2024-06-27 20:22:44,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 188 transitions, 1761 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 20:22:44,131 INFO L231 Difference]: Finished difference. Result has 242 places, 159 transitions, 1323 flow [2024-06-27 20:22:44,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1323, PETRI_PLACES=242, PETRI_TRANSITIONS=159} [2024-06-27 20:22:44,132 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 212 predicate places. [2024-06-27 20:22:44,132 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 159 transitions, 1323 flow [2024-06-27 20:22:44,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:44,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:44,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:44,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 20:22:44,132 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:44,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:44,132 INFO L85 PathProgramCache]: Analyzing trace with hash 856008876, now seen corresponding path program 23 times [2024-06-27 20:22:44,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:44,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922275069] [2024-06-27 20:22:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:44,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:44,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:44,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922275069] [2024-06-27 20:22:44,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922275069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:44,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:44,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:44,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233932395] [2024-06-27 20:22:44,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:44,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:44,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:44,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:44,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:45,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:45,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 159 transitions, 1323 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:45,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:45,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:45,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:45,640 INFO L124 PetriNetUnfolderBase]: 418/819 cut-off events. [2024-06-27 20:22:45,640 INFO L125 PetriNetUnfolderBase]: For 106555/106555 co-relation queries the response was YES. [2024-06-27 20:22:45,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5290 conditions, 819 events. 418/819 cut-off events. For 106555/106555 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4170 event pairs, 85 based on Foata normal form. 8/825 useless extension candidates. Maximal degree in co-relation 5188. Up to 525 conditions per place. [2024-06-27 20:22:45,648 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 129 selfloop transitions, 44 changer transitions 10/185 dead transitions. [2024-06-27 20:22:45,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 185 transitions, 2039 flow [2024-06-27 20:22:45,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:22:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:22:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 155 transitions. [2024-06-27 20:22:45,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-27 20:22:45,649 INFO L175 Difference]: Start difference. First operand has 242 places, 159 transitions, 1323 flow. Second operand 13 states and 155 transitions. [2024-06-27 20:22:45,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 185 transitions, 2039 flow [2024-06-27 20:22:45,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 185 transitions, 1927 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-27 20:22:45,853 INFO L231 Difference]: Finished difference. Result has 229 places, 156 transitions, 1308 flow [2024-06-27 20:22:45,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1308, PETRI_PLACES=229, PETRI_TRANSITIONS=156} [2024-06-27 20:22:45,854 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 199 predicate places. [2024-06-27 20:22:45,854 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 156 transitions, 1308 flow [2024-06-27 20:22:45,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:45,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:45,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:45,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 20:22:45,854 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:45,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:45,855 INFO L85 PathProgramCache]: Analyzing trace with hash 199462808, now seen corresponding path program 2 times [2024-06-27 20:22:45,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:45,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451154636] [2024-06-27 20:22:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:45,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:46,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:46,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451154636] [2024-06-27 20:22:46,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451154636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:46,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:46,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:46,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575338086] [2024-06-27 20:22:46,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:46,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:46,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:46,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:46,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:47,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:47,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 156 transitions, 1308 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:47,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:47,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:47,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:47,294 INFO L124 PetriNetUnfolderBase]: 400/781 cut-off events. [2024-06-27 20:22:47,294 INFO L125 PetriNetUnfolderBase]: For 76252/76252 co-relation queries the response was YES. [2024-06-27 20:22:47,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4998 conditions, 781 events. 400/781 cut-off events. For 76252/76252 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3904 event pairs, 83 based on Foata normal form. 2/781 useless extension candidates. Maximal degree in co-relation 4901. Up to 698 conditions per place. [2024-06-27 20:22:47,301 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 145 selfloop transitions, 25 changer transitions 0/172 dead transitions. [2024-06-27 20:22:47,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 172 transitions, 1697 flow [2024-06-27 20:22:47,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:22:47,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:22:47,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-27 20:22:47,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:22:47,302 INFO L175 Difference]: Start difference. First operand has 229 places, 156 transitions, 1308 flow. Second operand 11 states and 121 transitions. [2024-06-27 20:22:47,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 172 transitions, 1697 flow [2024-06-27 20:22:47,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 172 transitions, 1612 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-27 20:22:47,469 INFO L231 Difference]: Finished difference. Result has 224 places, 157 transitions, 1289 flow [2024-06-27 20:22:47,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1289, PETRI_PLACES=224, PETRI_TRANSITIONS=157} [2024-06-27 20:22:47,469 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2024-06-27 20:22:47,469 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 157 transitions, 1289 flow [2024-06-27 20:22:47,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:47,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:47,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:47,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 20:22:47,470 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:47,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:47,470 INFO L85 PathProgramCache]: Analyzing trace with hash 191828872, now seen corresponding path program 24 times [2024-06-27 20:22:47,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:47,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37050704] [2024-06-27 20:22:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:47,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:48,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:48,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37050704] [2024-06-27 20:22:48,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37050704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:48,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:48,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:48,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179920578] [2024-06-27 20:22:48,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:48,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:48,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:48,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:48,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:48,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:48,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 157 transitions, 1289 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:48,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:48,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:48,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:48,968 INFO L124 PetriNetUnfolderBase]: 441/868 cut-off events. [2024-06-27 20:22:48,968 INFO L125 PetriNetUnfolderBase]: For 119674/119674 co-relation queries the response was YES. [2024-06-27 20:22:48,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6194 conditions, 868 events. 441/868 cut-off events. For 119674/119674 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4465 event pairs, 100 based on Foata normal form. 8/874 useless extension candidates. Maximal degree in co-relation 6099. Up to 704 conditions per place. [2024-06-27 20:22:48,975 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 151 selfloop transitions, 21 changer transitions 7/181 dead transitions. [2024-06-27 20:22:48,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 181 transitions, 1969 flow [2024-06-27 20:22:48,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-27 20:22:48,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-27 20:22:48,976 INFO L175 Difference]: Start difference. First operand has 224 places, 157 transitions, 1289 flow. Second operand 12 states and 139 transitions. [2024-06-27 20:22:48,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 181 transitions, 1969 flow [2024-06-27 20:22:49,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 181 transitions, 1895 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 20:22:49,160 INFO L231 Difference]: Finished difference. Result has 227 places, 155 transitions, 1249 flow [2024-06-27 20:22:49,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1249, PETRI_PLACES=227, PETRI_TRANSITIONS=155} [2024-06-27 20:22:49,161 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 197 predicate places. [2024-06-27 20:22:49,161 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 155 transitions, 1249 flow [2024-06-27 20:22:49,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:49,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:49,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:49,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 20:22:49,161 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:49,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:49,161 INFO L85 PathProgramCache]: Analyzing trace with hash 191834452, now seen corresponding path program 25 times [2024-06-27 20:22:49,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:49,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086923461] [2024-06-27 20:22:49,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:49,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:49,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:49,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086923461] [2024-06-27 20:22:49,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086923461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:49,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:49,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:49,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964516819] [2024-06-27 20:22:49,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:49,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:49,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:49,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:49,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:50,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:50,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 155 transitions, 1249 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:50,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:50,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:50,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:50,530 INFO L124 PetriNetUnfolderBase]: 410/807 cut-off events. [2024-06-27 20:22:50,530 INFO L125 PetriNetUnfolderBase]: For 98609/98609 co-relation queries the response was YES. [2024-06-27 20:22:50,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5129 conditions, 807 events. 410/807 cut-off events. For 98609/98609 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4107 event pairs, 91 based on Foata normal form. 10/815 useless extension candidates. Maximal degree in co-relation 5033. Up to 678 conditions per place. [2024-06-27 20:22:50,536 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 132 selfloop transitions, 25 changer transitions 15/174 dead transitions. [2024-06-27 20:22:50,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 174 transitions, 1713 flow [2024-06-27 20:22:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-27 20:22:50,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-27 20:22:50,537 INFO L175 Difference]: Start difference. First operand has 227 places, 155 transitions, 1249 flow. Second operand 12 states and 135 transitions. [2024-06-27 20:22:50,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 174 transitions, 1713 flow [2024-06-27 20:22:50,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 174 transitions, 1669 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:22:50,688 INFO L231 Difference]: Finished difference. Result has 226 places, 150 transitions, 1223 flow [2024-06-27 20:22:50,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1223, PETRI_PLACES=226, PETRI_TRANSITIONS=150} [2024-06-27 20:22:50,688 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 196 predicate places. [2024-06-27 20:22:50,688 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 150 transitions, 1223 flow [2024-06-27 20:22:50,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:50,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:50,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:50,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 20:22:50,688 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:50,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash 932667988, now seen corresponding path program 26 times [2024-06-27 20:22:50,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:50,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461807748] [2024-06-27 20:22:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:50,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:51,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:51,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461807748] [2024-06-27 20:22:51,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461807748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:51,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:51,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:51,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847314922] [2024-06-27 20:22:51,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:51,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:51,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:51,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:51,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:51,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:51,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 150 transitions, 1223 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:51,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:51,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:51,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:52,019 INFO L124 PetriNetUnfolderBase]: 400/789 cut-off events. [2024-06-27 20:22:52,019 INFO L125 PetriNetUnfolderBase]: For 96217/96217 co-relation queries the response was YES. [2024-06-27 20:22:52,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5042 conditions, 789 events. 400/789 cut-off events. For 96217/96217 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3985 event pairs, 91 based on Foata normal form. 10/797 useless extension candidates. Maximal degree in co-relation 4947. Up to 609 conditions per place. [2024-06-27 20:22:52,025 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 116 selfloop transitions, 41 changer transitions 11/170 dead transitions. [2024-06-27 20:22:52,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 170 transitions, 1683 flow [2024-06-27 20:22:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-27 20:22:52,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3844086021505376 [2024-06-27 20:22:52,026 INFO L175 Difference]: Start difference. First operand has 226 places, 150 transitions, 1223 flow. Second operand 12 states and 143 transitions. [2024-06-27 20:22:52,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 170 transitions, 1683 flow [2024-06-27 20:22:52,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 170 transitions, 1609 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-27 20:22:52,181 INFO L231 Difference]: Finished difference. Result has 219 places, 147 transitions, 1224 flow [2024-06-27 20:22:52,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1224, PETRI_PLACES=219, PETRI_TRANSITIONS=147} [2024-06-27 20:22:52,182 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 189 predicate places. [2024-06-27 20:22:52,182 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 147 transitions, 1224 flow [2024-06-27 20:22:52,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:52,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:52,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:52,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 20:22:52,182 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:52,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:52,182 INFO L85 PathProgramCache]: Analyzing trace with hash 932662408, now seen corresponding path program 27 times [2024-06-27 20:22:52,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:52,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447579260] [2024-06-27 20:22:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:52,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:53,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:53,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447579260] [2024-06-27 20:22:53,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447579260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:53,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:53,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:53,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035805642] [2024-06-27 20:22:53,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:53,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:53,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:53,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:53,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:53,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:53,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 147 transitions, 1224 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:53,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:53,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:53,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:53,747 INFO L124 PetriNetUnfolderBase]: 417/828 cut-off events. [2024-06-27 20:22:53,747 INFO L125 PetriNetUnfolderBase]: For 110800/110800 co-relation queries the response was YES. [2024-06-27 20:22:53,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5879 conditions, 828 events. 417/828 cut-off events. For 110800/110800 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4203 event pairs, 100 based on Foata normal form. 8/834 useless extension candidates. Maximal degree in co-relation 5787. Up to 609 conditions per place. [2024-06-27 20:22:53,755 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 130 selfloop transitions, 30 changer transitions 11/173 dead transitions. [2024-06-27 20:22:53,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 173 transitions, 1876 flow [2024-06-27 20:22:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:22:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:22:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 154 transitions. [2024-06-27 20:22:53,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38213399503722084 [2024-06-27 20:22:53,756 INFO L175 Difference]: Start difference. First operand has 219 places, 147 transitions, 1224 flow. Second operand 13 states and 154 transitions. [2024-06-27 20:22:53,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 173 transitions, 1876 flow [2024-06-27 20:22:53,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 173 transitions, 1786 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-27 20:22:53,922 INFO L231 Difference]: Finished difference. Result has 218 places, 141 transitions, 1161 flow [2024-06-27 20:22:53,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1161, PETRI_PLACES=218, PETRI_TRANSITIONS=141} [2024-06-27 20:22:53,922 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 188 predicate places. [2024-06-27 20:22:53,922 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 141 transitions, 1161 flow [2024-06-27 20:22:53,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:53,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:53,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:53,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 20:22:53,922 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:53,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:53,923 INFO L85 PathProgramCache]: Analyzing trace with hash 12940496, now seen corresponding path program 28 times [2024-06-27 20:22:53,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:53,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897444475] [2024-06-27 20:22:53,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:53,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:54,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:54,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897444475] [2024-06-27 20:22:54,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897444475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:54,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:54,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:54,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086932468] [2024-06-27 20:22:54,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:54,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:54,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:54,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:54,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 141 transitions, 1161 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:54,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:54,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:54,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:55,352 INFO L124 PetriNetUnfolderBase]: 432/861 cut-off events. [2024-06-27 20:22:55,353 INFO L125 PetriNetUnfolderBase]: For 135002/135002 co-relation queries the response was YES. [2024-06-27 20:22:55,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6784 conditions, 861 events. 432/861 cut-off events. For 135002/135002 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4429 event pairs, 119 based on Foata normal form. 8/867 useless extension candidates. Maximal degree in co-relation 6693. Up to 663 conditions per place. [2024-06-27 20:22:55,359 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 128 selfloop transitions, 27 changer transitions 9/166 dead transitions. [2024-06-27 20:22:55,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 166 transitions, 1793 flow [2024-06-27 20:22:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:22:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:22:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 147 transitions. [2024-06-27 20:22:55,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36476426799007444 [2024-06-27 20:22:55,360 INFO L175 Difference]: Start difference. First operand has 218 places, 141 transitions, 1161 flow. Second operand 13 states and 147 transitions. [2024-06-27 20:22:55,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 166 transitions, 1793 flow [2024-06-27 20:22:55,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 166 transitions, 1705 flow, removed 14 selfloop flow, removed 15 redundant places. [2024-06-27 20:22:55,538 INFO L231 Difference]: Finished difference. Result has 211 places, 137 transitions, 1116 flow [2024-06-27 20:22:55,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1116, PETRI_PLACES=211, PETRI_TRANSITIONS=137} [2024-06-27 20:22:55,539 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-06-27 20:22:55,539 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 137 transitions, 1116 flow [2024-06-27 20:22:55,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:55,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:55,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:55,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 20:22:55,539 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:55,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:55,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1464749404, now seen corresponding path program 29 times [2024-06-27 20:22:55,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:55,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838131772] [2024-06-27 20:22:55,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:55,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:56,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:56,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838131772] [2024-06-27 20:22:56,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838131772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:56,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:56,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:56,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623427830] [2024-06-27 20:22:56,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:56,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:56,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:56,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:56,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:56,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:56,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 137 transitions, 1116 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:56,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:56,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:56,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:56,971 INFO L124 PetriNetUnfolderBase]: 424/849 cut-off events. [2024-06-27 20:22:56,972 INFO L125 PetriNetUnfolderBase]: For 125905/125905 co-relation queries the response was YES. [2024-06-27 20:22:56,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6568 conditions, 849 events. 424/849 cut-off events. For 125905/125905 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4404 event pairs, 125 based on Foata normal form. 10/857 useless extension candidates. Maximal degree in co-relation 6481. Up to 692 conditions per place. [2024-06-27 20:22:56,978 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 107 selfloop transitions, 35 changer transitions 13/157 dead transitions. [2024-06-27 20:22:56,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 157 transitions, 1538 flow [2024-06-27 20:22:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:22:56,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:22:56,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 144 transitions. [2024-06-27 20:22:56,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573200992555831 [2024-06-27 20:22:56,979 INFO L175 Difference]: Start difference. First operand has 211 places, 137 transitions, 1116 flow. Second operand 13 states and 144 transitions. [2024-06-27 20:22:56,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 157 transitions, 1538 flow [2024-06-27 20:22:57,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 157 transitions, 1484 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-27 20:22:57,129 INFO L231 Difference]: Finished difference. Result has 209 places, 133 transitions, 1112 flow [2024-06-27 20:22:57,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1112, PETRI_PLACES=209, PETRI_TRANSITIONS=133} [2024-06-27 20:22:57,130 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-27 20:22:57,130 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 133 transitions, 1112 flow [2024-06-27 20:22:57,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:57,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:57,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:57,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 20:22:57,131 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:57,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:57,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1054009988, now seen corresponding path program 30 times [2024-06-27 20:22:57,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:57,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378175879] [2024-06-27 20:22:57,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:57,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:58,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:58,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378175879] [2024-06-27 20:22:58,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378175879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:58,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:58,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:58,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052822039] [2024-06-27 20:22:58,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:58,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:58,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:58,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:58,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:58,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:58,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 133 transitions, 1112 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:58,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:58,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:58,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:58,457 INFO L124 PetriNetUnfolderBase]: 386/775 cut-off events. [2024-06-27 20:22:58,457 INFO L125 PetriNetUnfolderBase]: For 98872/98872 co-relation queries the response was YES. [2024-06-27 20:22:58,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5506 conditions, 775 events. 386/775 cut-off events. For 98872/98872 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3910 event pairs, 112 based on Foata normal form. 10/783 useless extension candidates. Maximal degree in co-relation 5420. Up to 642 conditions per place. [2024-06-27 20:22:58,462 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 112 selfloop transitions, 22 changer transitions 16/152 dead transitions. [2024-06-27 20:22:58,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 152 transitions, 1520 flow [2024-06-27 20:22:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:22:58,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:22:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-27 20:22:58,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-27 20:22:58,464 INFO L175 Difference]: Start difference. First operand has 209 places, 133 transitions, 1112 flow. Second operand 12 states and 136 transitions. [2024-06-27 20:22:58,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 152 transitions, 1520 flow [2024-06-27 20:22:58,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 152 transitions, 1438 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-27 20:22:58,608 INFO L231 Difference]: Finished difference. Result has 204 places, 127 transitions, 1038 flow [2024-06-27 20:22:58,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1038, PETRI_PLACES=204, PETRI_TRANSITIONS=127} [2024-06-27 20:22:58,608 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2024-06-27 20:22:58,608 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 127 transitions, 1038 flow [2024-06-27 20:22:58,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:58,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:58,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:58,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 20:22:58,609 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:22:58,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:58,609 INFO L85 PathProgramCache]: Analyzing trace with hash 638169294, now seen corresponding path program 31 times [2024-06-27 20:22:58,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:58,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429034174] [2024-06-27 20:22:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:58,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:59,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:59,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429034174] [2024-06-27 20:22:59,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429034174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:59,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:59,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:22:59,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256210881] [2024-06-27 20:22:59,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:59,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:22:59,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:59,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:22:59,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:22:59,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:22:59,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 127 transitions, 1038 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:59,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:59,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:22:59,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:00,034 INFO L124 PetriNetUnfolderBase]: 346/695 cut-off events. [2024-06-27 20:23:00,034 INFO L125 PetriNetUnfolderBase]: For 71220/71220 co-relation queries the response was YES. [2024-06-27 20:23:00,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4319 conditions, 695 events. 346/695 cut-off events. For 71220/71220 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3405 event pairs, 87 based on Foata normal form. 10/703 useless extension candidates. Maximal degree in co-relation 4235. Up to 569 conditions per place. [2024-06-27 20:23:00,038 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 104 selfloop transitions, 26 changer transitions 15/147 dead transitions. [2024-06-27 20:23:00,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 147 transitions, 1436 flow [2024-06-27 20:23:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:23:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:23:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 141 transitions. [2024-06-27 20:23:00,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34987593052109184 [2024-06-27 20:23:00,039 INFO L175 Difference]: Start difference. First operand has 204 places, 127 transitions, 1038 flow. Second operand 13 states and 141 transitions. [2024-06-27 20:23:00,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 147 transitions, 1436 flow [2024-06-27 20:23:00,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 147 transitions, 1366 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-27 20:23:00,114 INFO L231 Difference]: Finished difference. Result has 196 places, 122 transitions, 995 flow [2024-06-27 20:23:00,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=995, PETRI_PLACES=196, PETRI_TRANSITIONS=122} [2024-06-27 20:23:00,114 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 166 predicate places. [2024-06-27 20:23:00,114 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 122 transitions, 995 flow [2024-06-27 20:23:00,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:00,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:00,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:00,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 20:23:00,115 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:00,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:00,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1670269756, now seen corresponding path program 32 times [2024-06-27 20:23:00,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:00,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629848701] [2024-06-27 20:23:00,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:00,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:00,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:00,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629848701] [2024-06-27 20:23:00,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629848701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:00,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:00,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:00,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464515169] [2024-06-27 20:23:00,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:00,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:00,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:00,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:00,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:01,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:01,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 122 transitions, 995 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:01,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:01,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:01,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:01,388 INFO L124 PetriNetUnfolderBase]: 361/728 cut-off events. [2024-06-27 20:23:01,388 INFO L125 PetriNetUnfolderBase]: For 78524/78524 co-relation queries the response was YES. [2024-06-27 20:23:01,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4939 conditions, 728 events. 361/728 cut-off events. For 78524/78524 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3601 event pairs, 94 based on Foata normal form. 8/734 useless extension candidates. Maximal degree in co-relation 4859. Up to 507 conditions per place. [2024-06-27 20:23:01,393 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 105 selfloop transitions, 28 changer transitions 12/147 dead transitions. [2024-06-27 20:23:01,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 147 transitions, 1549 flow [2024-06-27 20:23:01,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-27 20:23:01,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-27 20:23:01,394 INFO L175 Difference]: Start difference. First operand has 196 places, 122 transitions, 995 flow. Second operand 12 states and 140 transitions. [2024-06-27 20:23:01,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 147 transitions, 1549 flow [2024-06-27 20:23:01,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 147 transitions, 1461 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-06-27 20:23:01,490 INFO L231 Difference]: Finished difference. Result has 188 places, 117 transitions, 952 flow [2024-06-27 20:23:01,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=952, PETRI_PLACES=188, PETRI_TRANSITIONS=117} [2024-06-27 20:23:01,490 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2024-06-27 20:23:01,490 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 117 transitions, 952 flow [2024-06-27 20:23:01,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:01,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:01,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:01,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 20:23:01,490 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:01,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:01,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2131469124, now seen corresponding path program 3 times [2024-06-27 20:23:01,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:01,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416066609] [2024-06-27 20:23:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:01,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:02,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:02,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416066609] [2024-06-27 20:23:02,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416066609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:02,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:02,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:02,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117977378] [2024-06-27 20:23:02,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:02,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:02,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:02,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:02,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:02,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:02,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 117 transitions, 952 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:02,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:02,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:02,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:02,956 INFO L124 PetriNetUnfolderBase]: 341/684 cut-off events. [2024-06-27 20:23:02,956 INFO L125 PetriNetUnfolderBase]: For 61129/61129 co-relation queries the response was YES. [2024-06-27 20:23:02,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4618 conditions, 684 events. 341/684 cut-off events. For 61129/61129 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3322 event pairs, 102 based on Foata normal form. 2/684 useless extension candidates. Maximal degree in co-relation 4541. Up to 631 conditions per place. [2024-06-27 20:23:02,960 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 107 selfloop transitions, 22 changer transitions 0/131 dead transitions. [2024-06-27 20:23:02,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 131 transitions, 1254 flow [2024-06-27 20:23:02,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:23:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:23:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-27 20:23:02,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-27 20:23:02,961 INFO L175 Difference]: Start difference. First operand has 188 places, 117 transitions, 952 flow. Second operand 11 states and 117 transitions. [2024-06-27 20:23:02,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 131 transitions, 1254 flow [2024-06-27 20:23:03,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 131 transitions, 1193 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-27 20:23:03,041 INFO L231 Difference]: Finished difference. Result has 180 places, 118 transitions, 954 flow [2024-06-27 20:23:03,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=954, PETRI_PLACES=180, PETRI_TRANSITIONS=118} [2024-06-27 20:23:03,042 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-06-27 20:23:03,042 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 118 transitions, 954 flow [2024-06-27 20:23:03,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:03,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:03,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:03,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 20:23:03,042 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:03,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:03,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2131201718, now seen corresponding path program 33 times [2024-06-27 20:23:03,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:03,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898075446] [2024-06-27 20:23:03,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:03,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:03,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:03,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898075446] [2024-06-27 20:23:03,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898075446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:03,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:03,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:03,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325571886] [2024-06-27 20:23:03,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:03,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:03,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:03,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:03,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:04,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:04,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 118 transitions, 954 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:04,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:04,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:04,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:04,402 INFO L124 PetriNetUnfolderBase]: 357/720 cut-off events. [2024-06-27 20:23:04,402 INFO L125 PetriNetUnfolderBase]: For 65739/65739 co-relation queries the response was YES. [2024-06-27 20:23:04,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4656 conditions, 720 events. 357/720 cut-off events. For 65739/65739 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3565 event pairs, 106 based on Foata normal form. 10/728 useless extension candidates. Maximal degree in co-relation 4583. Up to 623 conditions per place. [2024-06-27 20:23:04,407 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 104 selfloop transitions, 19 changer transitions 12/137 dead transitions. [2024-06-27 20:23:04,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 137 transitions, 1314 flow [2024-06-27 20:23:04,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:04,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-27 20:23:04,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34946236559139787 [2024-06-27 20:23:04,408 INFO L175 Difference]: Start difference. First operand has 180 places, 118 transitions, 954 flow. Second operand 12 states and 130 transitions. [2024-06-27 20:23:04,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 137 transitions, 1314 flow [2024-06-27 20:23:04,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 137 transitions, 1263 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 20:23:04,499 INFO L231 Difference]: Finished difference. Result has 183 places, 114 transitions, 907 flow [2024-06-27 20:23:04,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=907, PETRI_PLACES=183, PETRI_TRANSITIONS=114} [2024-06-27 20:23:04,499 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-27 20:23:04,499 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 114 transitions, 907 flow [2024-06-27 20:23:04,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:04,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:04,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:04,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 20:23:04,500 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:04,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:04,500 INFO L85 PathProgramCache]: Analyzing trace with hash -534361448, now seen corresponding path program 4 times [2024-06-27 20:23:04,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:04,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990621192] [2024-06-27 20:23:04,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:04,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:05,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:05,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990621192] [2024-06-27 20:23:05,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990621192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:05,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:05,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:05,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922558594] [2024-06-27 20:23:05,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:05,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:05,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:05,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:05,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:05,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:05,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 114 transitions, 907 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:05,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:05,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:05,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:05,870 INFO L124 PetriNetUnfolderBase]: 333/676 cut-off events. [2024-06-27 20:23:05,870 INFO L125 PetriNetUnfolderBase]: For 55187/55187 co-relation queries the response was YES. [2024-06-27 20:23:05,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4455 conditions, 676 events. 333/676 cut-off events. For 55187/55187 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3303 event pairs, 104 based on Foata normal form. 2/676 useless extension candidates. Maximal degree in co-relation 4381. Up to 575 conditions per place. [2024-06-27 20:23:05,874 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 101 selfloop transitions, 27 changer transitions 0/130 dead transitions. [2024-06-27 20:23:05,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 130 transitions, 1218 flow [2024-06-27 20:23:05,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:23:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:23:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-27 20:23:05,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-27 20:23:05,875 INFO L175 Difference]: Start difference. First operand has 183 places, 114 transitions, 907 flow. Second operand 11 states and 123 transitions. [2024-06-27 20:23:05,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 130 transitions, 1218 flow [2024-06-27 20:23:05,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 130 transitions, 1174 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:23:05,947 INFO L231 Difference]: Finished difference. Result has 180 places, 115 transitions, 939 flow [2024-06-27 20:23:05,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=939, PETRI_PLACES=180, PETRI_TRANSITIONS=115} [2024-06-27 20:23:05,948 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-06-27 20:23:05,948 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 115 transitions, 939 flow [2024-06-27 20:23:05,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:05,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:05,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:05,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 20:23:05,949 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:05,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:05,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1131969778, now seen corresponding path program 34 times [2024-06-27 20:23:05,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:05,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322016606] [2024-06-27 20:23:05,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:05,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:06,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:06,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322016606] [2024-06-27 20:23:06,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322016606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:06,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:06,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:06,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963612490] [2024-06-27 20:23:06,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:06,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:06,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:06,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:06,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:06,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:06,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 115 transitions, 939 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:06,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:06,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:06,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:07,247 INFO L124 PetriNetUnfolderBase]: 342/699 cut-off events. [2024-06-27 20:23:07,248 INFO L125 PetriNetUnfolderBase]: For 62425/62425 co-relation queries the response was YES. [2024-06-27 20:23:07,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4410 conditions, 699 events. 342/699 cut-off events. For 62425/62425 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3476 event pairs, 109 based on Foata normal form. 10/707 useless extension candidates. Maximal degree in co-relation 4337. Up to 552 conditions per place. [2024-06-27 20:23:07,253 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 92 selfloop transitions, 29 changer transitions 11/134 dead transitions. [2024-06-27 20:23:07,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 134 transitions, 1293 flow [2024-06-27 20:23:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-27 20:23:07,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-27 20:23:07,254 INFO L175 Difference]: Start difference. First operand has 180 places, 115 transitions, 939 flow. Second operand 12 states and 138 transitions. [2024-06-27 20:23:07,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 134 transitions, 1293 flow [2024-06-27 20:23:07,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 134 transitions, 1229 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 20:23:07,330 INFO L231 Difference]: Finished difference. Result has 183 places, 112 transitions, 918 flow [2024-06-27 20:23:07,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=918, PETRI_PLACES=183, PETRI_TRANSITIONS=112} [2024-06-27 20:23:07,331 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-27 20:23:07,331 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 112 transitions, 918 flow [2024-06-27 20:23:07,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:07,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:07,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:07,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 20:23:07,331 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:07,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:07,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1883317046, now seen corresponding path program 5 times [2024-06-27 20:23:07,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:07,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151455165] [2024-06-27 20:23:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:07,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:08,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:08,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151455165] [2024-06-27 20:23:08,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151455165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:08,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:08,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:08,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659730338] [2024-06-27 20:23:08,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:08,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:08,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:08,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:08,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:08,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:08,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 112 transitions, 918 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:08,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:08,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:08,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:08,755 INFO L124 PetriNetUnfolderBase]: 322/659 cut-off events. [2024-06-27 20:23:08,755 INFO L125 PetriNetUnfolderBase]: For 51812/51812 co-relation queries the response was YES. [2024-06-27 20:23:08,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4257 conditions, 659 events. 322/659 cut-off events. For 51812/51812 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3214 event pairs, 105 based on Foata normal form. 2/659 useless extension candidates. Maximal degree in co-relation 4183. Up to 597 conditions per place. [2024-06-27 20:23:08,759 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 107 selfloop transitions, 19 changer transitions 0/128 dead transitions. [2024-06-27 20:23:08,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 128 transitions, 1225 flow [2024-06-27 20:23:08,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:23:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:23:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-27 20:23:08,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-27 20:23:08,760 INFO L175 Difference]: Start difference. First operand has 183 places, 112 transitions, 918 flow. Second operand 11 states and 118 transitions. [2024-06-27 20:23:08,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 128 transitions, 1225 flow [2024-06-27 20:23:08,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 128 transitions, 1163 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:23:08,836 INFO L231 Difference]: Finished difference. Result has 180 places, 113 transitions, 916 flow [2024-06-27 20:23:08,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=916, PETRI_PLACES=180, PETRI_TRANSITIONS=113} [2024-06-27 20:23:08,836 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-06-27 20:23:08,836 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 113 transitions, 916 flow [2024-06-27 20:23:08,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:08,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:08,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:08,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 20:23:08,837 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:08,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:08,837 INFO L85 PathProgramCache]: Analyzing trace with hash -886829648, now seen corresponding path program 35 times [2024-06-27 20:23:08,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:08,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438238855] [2024-06-27 20:23:08,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:08,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:09,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:09,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438238855] [2024-06-27 20:23:09,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438238855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:09,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:09,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:09,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938863196] [2024-06-27 20:23:09,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:09,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:09,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:09,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:09,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:09,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:09,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 113 transitions, 916 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:09,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:09,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:09,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:10,191 INFO L124 PetriNetUnfolderBase]: 331/682 cut-off events. [2024-06-27 20:23:10,191 INFO L125 PetriNetUnfolderBase]: For 59055/59055 co-relation queries the response was YES. [2024-06-27 20:23:10,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4182 conditions, 682 events. 331/682 cut-off events. For 59055/59055 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3396 event pairs, 108 based on Foata normal form. 10/690 useless extension candidates. Maximal degree in co-relation 4109. Up to 574 conditions per place. [2024-06-27 20:23:10,195 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 97 selfloop transitions, 22 changer transitions 11/132 dead transitions. [2024-06-27 20:23:10,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 132 transitions, 1266 flow [2024-06-27 20:23:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:10,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-27 20:23:10,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-27 20:23:10,196 INFO L175 Difference]: Start difference. First operand has 180 places, 113 transitions, 916 flow. Second operand 12 states and 132 transitions. [2024-06-27 20:23:10,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 132 transitions, 1266 flow [2024-06-27 20:23:10,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 132 transitions, 1213 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 20:23:10,262 INFO L231 Difference]: Finished difference. Result has 183 places, 110 transitions, 892 flow [2024-06-27 20:23:10,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=892, PETRI_PLACES=183, PETRI_TRANSITIONS=110} [2024-06-27 20:23:10,262 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-27 20:23:10,262 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 110 transitions, 892 flow [2024-06-27 20:23:10,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:10,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:10,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:10,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 20:23:10,263 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:10,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:10,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1875683110, now seen corresponding path program 36 times [2024-06-27 20:23:10,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:10,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510470040] [2024-06-27 20:23:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:10,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:11,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:11,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510470040] [2024-06-27 20:23:11,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510470040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:11,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:11,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:11,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817147144] [2024-06-27 20:23:11,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:11,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:11,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:11,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:11,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:11,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:11,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 110 transitions, 892 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:11,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:11,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:11,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:11,697 INFO L124 PetriNetUnfolderBase]: 297/616 cut-off events. [2024-06-27 20:23:11,697 INFO L125 PetriNetUnfolderBase]: For 44977/44977 co-relation queries the response was YES. [2024-06-27 20:23:11,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3467 conditions, 616 events. 297/616 cut-off events. For 44977/44977 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2985 event pairs, 88 based on Foata normal form. 8/622 useless extension candidates. Maximal degree in co-relation 3393. Up to 544 conditions per place. [2024-06-27 20:23:11,700 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 100 selfloop transitions, 12 changer transitions 13/127 dead transitions. [2024-06-27 20:23:11,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 127 transitions, 1204 flow [2024-06-27 20:23:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:11,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-27 20:23:11,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33602150537634407 [2024-06-27 20:23:11,701 INFO L175 Difference]: Start difference. First operand has 183 places, 110 transitions, 892 flow. Second operand 12 states and 125 transitions. [2024-06-27 20:23:11,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 127 transitions, 1204 flow [2024-06-27 20:23:11,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 127 transitions, 1156 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:23:11,757 INFO L231 Difference]: Finished difference. Result has 181 places, 106 transitions, 841 flow [2024-06-27 20:23:11,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=841, PETRI_PLACES=181, PETRI_TRANSITIONS=106} [2024-06-27 20:23:11,757 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2024-06-27 20:23:11,757 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 106 transitions, 841 flow [2024-06-27 20:23:11,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:11,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:11,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:11,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 20:23:11,758 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:11,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:11,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2143075458, now seen corresponding path program 6 times [2024-06-27 20:23:11,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:11,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030253781] [2024-06-27 20:23:11,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:11,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:12,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:12,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030253781] [2024-06-27 20:23:12,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030253781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:12,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:12,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:12,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089464987] [2024-06-27 20:23:12,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:12,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:12,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:12,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:12,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:12,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:12,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 106 transitions, 841 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:12,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:12,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:12,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:13,219 INFO L124 PetriNetUnfolderBase]: 304/633 cut-off events. [2024-06-27 20:23:13,219 INFO L125 PetriNetUnfolderBase]: For 51843/51843 co-relation queries the response was YES. [2024-06-27 20:23:13,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3846 conditions, 633 events. 304/633 cut-off events. For 51843/51843 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3060 event pairs, 101 based on Foata normal form. 8/639 useless extension candidates. Maximal degree in co-relation 3773. Up to 503 conditions per place. [2024-06-27 20:23:13,223 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 99 selfloop transitions, 16 changer transitions 8/125 dead transitions. [2024-06-27 20:23:13,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 125 transitions, 1297 flow [2024-06-27 20:23:13,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:23:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:23:13,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-27 20:23:13,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-27 20:23:13,224 INFO L175 Difference]: Start difference. First operand has 181 places, 106 transitions, 841 flow. Second operand 11 states and 122 transitions. [2024-06-27 20:23:13,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 125 transitions, 1297 flow [2024-06-27 20:23:13,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 125 transitions, 1230 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-27 20:23:13,295 INFO L231 Difference]: Finished difference. Result has 172 places, 103 transitions, 797 flow [2024-06-27 20:23:13,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=797, PETRI_PLACES=172, PETRI_TRANSITIONS=103} [2024-06-27 20:23:13,295 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-06-27 20:23:13,295 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 103 transitions, 797 flow [2024-06-27 20:23:13,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:13,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:13,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:13,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 20:23:13,296 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:13,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:13,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1131964198, now seen corresponding path program 37 times [2024-06-27 20:23:13,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:13,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742420865] [2024-06-27 20:23:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:13,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:14,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:14,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742420865] [2024-06-27 20:23:14,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742420865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:14,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:14,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:14,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047418671] [2024-06-27 20:23:14,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:14,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:14,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:14,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:14,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:14,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:14,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 103 transitions, 797 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:14,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:14,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:14,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:14,712 INFO L124 PetriNetUnfolderBase]: 274/575 cut-off events. [2024-06-27 20:23:14,712 INFO L125 PetriNetUnfolderBase]: For 36089/36089 co-relation queries the response was YES. [2024-06-27 20:23:14,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3043 conditions, 575 events. 274/575 cut-off events. For 36089/36089 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2741 event pairs, 83 based on Foata normal form. 8/581 useless extension candidates. Maximal degree in co-relation 2974. Up to 467 conditions per place. [2024-06-27 20:23:14,716 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 87 selfloop transitions, 19 changer transitions 13/121 dead transitions. [2024-06-27 20:23:14,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 121 transitions, 1097 flow [2024-06-27 20:23:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:14,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:14,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-27 20:23:14,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2024-06-27 20:23:14,716 INFO L175 Difference]: Start difference. First operand has 172 places, 103 transitions, 797 flow. Second operand 12 states and 133 transitions. [2024-06-27 20:23:14,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 121 transitions, 1097 flow [2024-06-27 20:23:14,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 121 transitions, 1063 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 20:23:14,767 INFO L231 Difference]: Finished difference. Result has 172 places, 99 transitions, 776 flow [2024-06-27 20:23:14,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=776, PETRI_PLACES=172, PETRI_TRANSITIONS=99} [2024-06-27 20:23:14,767 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-06-27 20:23:14,767 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 99 transitions, 776 flow [2024-06-27 20:23:14,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:14,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:14,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:14,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 20:23:14,768 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:14,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash -2056330132, now seen corresponding path program 38 times [2024-06-27 20:23:14,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:14,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868816075] [2024-06-27 20:23:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:14,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:15,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:15,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868816075] [2024-06-27 20:23:15,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868816075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:15,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:15,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:15,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148378502] [2024-06-27 20:23:15,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:15,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:15,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:15,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:15,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:16,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:16,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 99 transitions, 776 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:16,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:16,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:16,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:16,515 INFO L124 PetriNetUnfolderBase]: 295/618 cut-off events. [2024-06-27 20:23:16,515 INFO L125 PetriNetUnfolderBase]: For 48121/48121 co-relation queries the response was YES. [2024-06-27 20:23:16,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3720 conditions, 618 events. 295/618 cut-off events. For 48121/48121 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2976 event pairs, 98 based on Foata normal form. 8/624 useless extension candidates. Maximal degree in co-relation 3652. Up to 367 conditions per place. [2024-06-27 20:23:16,520 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 84 selfloop transitions, 25 changer transitions 13/124 dead transitions. [2024-06-27 20:23:16,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 124 transitions, 1236 flow [2024-06-27 20:23:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 20:23:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 20:23:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 156 transitions. [2024-06-27 20:23:16,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-27 20:23:16,521 INFO L175 Difference]: Start difference. First operand has 172 places, 99 transitions, 776 flow. Second operand 14 states and 156 transitions. [2024-06-27 20:23:16,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 124 transitions, 1236 flow [2024-06-27 20:23:16,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 124 transitions, 1168 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-27 20:23:16,585 INFO L231 Difference]: Finished difference. Result has 167 places, 93 transitions, 742 flow [2024-06-27 20:23:16,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=742, PETRI_PLACES=167, PETRI_TRANSITIONS=93} [2024-06-27 20:23:16,585 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2024-06-27 20:23:16,585 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 93 transitions, 742 flow [2024-06-27 20:23:16,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:16,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:16,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:16,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 20:23:16,586 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:16,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:16,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2056185982, now seen corresponding path program 39 times [2024-06-27 20:23:16,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:16,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466629785] [2024-06-27 20:23:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:16,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:17,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:17,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466629785] [2024-06-27 20:23:17,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466629785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:17,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:17,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:17,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298777995] [2024-06-27 20:23:17,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:17,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:17,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:17,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:17,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:17,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:17,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 93 transitions, 742 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:17,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:17,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:17,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:18,074 INFO L124 PetriNetUnfolderBase]: 310/651 cut-off events. [2024-06-27 20:23:18,074 INFO L125 PetriNetUnfolderBase]: For 54719/54719 co-relation queries the response was YES. [2024-06-27 20:23:18,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4222 conditions, 651 events. 310/651 cut-off events. For 54719/54719 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3175 event pairs, 111 based on Foata normal form. 8/657 useless extension candidates. Maximal degree in co-relation 4157. Up to 452 conditions per place. [2024-06-27 20:23:18,077 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 85 selfloop transitions, 25 changer transitions 7/119 dead transitions. [2024-06-27 20:23:18,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 119 transitions, 1190 flow [2024-06-27 20:23:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:18,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:18,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-27 20:23:18,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-27 20:23:18,078 INFO L175 Difference]: Start difference. First operand has 167 places, 93 transitions, 742 flow. Second operand 12 states and 142 transitions. [2024-06-27 20:23:18,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 119 transitions, 1190 flow [2024-06-27 20:23:18,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 119 transitions, 1103 flow, removed 11 selfloop flow, removed 17 redundant places. [2024-06-27 20:23:18,127 INFO L231 Difference]: Finished difference. Result has 157 places, 93 transitions, 721 flow [2024-06-27 20:23:18,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=721, PETRI_PLACES=157, PETRI_TRANSITIONS=93} [2024-06-27 20:23:18,127 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 127 predicate places. [2024-06-27 20:23:18,127 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 93 transitions, 721 flow [2024-06-27 20:23:18,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:18,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:18,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:18,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-27 20:23:18,127 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:18,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:18,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1838747752, now seen corresponding path program 7 times [2024-06-27 20:23:18,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:18,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209132558] [2024-06-27 20:23:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:18,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:19,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:19,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209132558] [2024-06-27 20:23:19,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209132558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:19,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:19,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:19,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406482450] [2024-06-27 20:23:19,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:19,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:19,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:19,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:19,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:19,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:19,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 93 transitions, 721 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:19,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:19,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:19,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:19,472 INFO L124 PetriNetUnfolderBase]: 289/608 cut-off events. [2024-06-27 20:23:19,472 INFO L125 PetriNetUnfolderBase]: For 39929/39929 co-relation queries the response was YES. [2024-06-27 20:23:19,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3832 conditions, 608 events. 289/608 cut-off events. For 39929/39929 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2898 event pairs, 112 based on Foata normal form. 2/608 useless extension candidates. Maximal degree in co-relation 3771. Up to 561 conditions per place. [2024-06-27 20:23:19,475 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 87 selfloop transitions, 17 changer transitions 0/106 dead transitions. [2024-06-27 20:23:19,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 106 transitions, 957 flow [2024-06-27 20:23:19,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:23:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:23:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-27 20:23:19,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3343108504398827 [2024-06-27 20:23:19,476 INFO L175 Difference]: Start difference. First operand has 157 places, 93 transitions, 721 flow. Second operand 11 states and 114 transitions. [2024-06-27 20:23:19,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 106 transitions, 957 flow [2024-06-27 20:23:19,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 106 transitions, 917 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 20:23:19,530 INFO L231 Difference]: Finished difference. Result has 157 places, 93 transitions, 719 flow [2024-06-27 20:23:19,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=719, PETRI_PLACES=157, PETRI_TRANSITIONS=93} [2024-06-27 20:23:19,530 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 127 predicate places. [2024-06-27 20:23:19,530 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 93 transitions, 719 flow [2024-06-27 20:23:19,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:19,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:19,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:19,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-27 20:23:19,531 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:19,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:19,531 INFO L85 PathProgramCache]: Analyzing trace with hash -64140046, now seen corresponding path program 40 times [2024-06-27 20:23:19,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:19,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059759107] [2024-06-27 20:23:19,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:19,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:20,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:20,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059759107] [2024-06-27 20:23:20,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059759107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:20,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:20,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:20,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472698435] [2024-06-27 20:23:20,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:20,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:20,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:20,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:20,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:20,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:20,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 93 transitions, 719 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:20,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:20,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:20,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:20,819 INFO L124 PetriNetUnfolderBase]: 276/585 cut-off events. [2024-06-27 20:23:20,819 INFO L125 PetriNetUnfolderBase]: For 36213/36213 co-relation queries the response was YES. [2024-06-27 20:23:20,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3275 conditions, 585 events. 276/585 cut-off events. For 36213/36213 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2783 event pairs, 99 based on Foata normal form. 10/593 useless extension candidates. Maximal degree in co-relation 3215. Up to 421 conditions per place. [2024-06-27 20:23:20,822 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 70 selfloop transitions, 26 changer transitions 15/113 dead transitions. [2024-06-27 20:23:20,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 113 transitions, 1019 flow [2024-06-27 20:23:20,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:20,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:20,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-27 20:23:20,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-27 20:23:20,822 INFO L175 Difference]: Start difference. First operand has 157 places, 93 transitions, 719 flow. Second operand 12 states and 140 transitions. [2024-06-27 20:23:20,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 113 transitions, 1019 flow [2024-06-27 20:23:20,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 113 transitions, 952 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-27 20:23:20,865 INFO L231 Difference]: Finished difference. Result has 159 places, 88 transitions, 674 flow [2024-06-27 20:23:20,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=674, PETRI_PLACES=159, PETRI_TRANSITIONS=88} [2024-06-27 20:23:20,865 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 129 predicate places. [2024-06-27 20:23:20,865 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 88 transitions, 674 flow [2024-06-27 20:23:20,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:20,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:20,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:20,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-27 20:23:20,866 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:20,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:20,866 INFO L85 PathProgramCache]: Analyzing trace with hash -67864696, now seen corresponding path program 41 times [2024-06-27 20:23:20,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:20,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058130312] [2024-06-27 20:23:20,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:20,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:21,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:21,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058130312] [2024-06-27 20:23:21,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058130312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:21,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:21,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:21,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276863947] [2024-06-27 20:23:21,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:21,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:21,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:21,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:21,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:21,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:21,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 88 transitions, 674 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:21,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:21,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:21,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:22,271 INFO L124 PetriNetUnfolderBase]: 262/559 cut-off events. [2024-06-27 20:23:22,271 INFO L125 PetriNetUnfolderBase]: For 35577/35577 co-relation queries the response was YES. [2024-06-27 20:23:22,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3149 conditions, 559 events. 262/559 cut-off events. For 35577/35577 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2639 event pairs, 89 based on Foata normal form. 8/565 useless extension candidates. Maximal degree in co-relation 3088. Up to 310 conditions per place. [2024-06-27 20:23:22,274 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 74 selfloop transitions, 24 changer transitions 14/114 dead transitions. [2024-06-27 20:23:22,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 114 transitions, 1094 flow [2024-06-27 20:23:22,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:22,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-27 20:23:22,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897849462365591 [2024-06-27 20:23:22,275 INFO L175 Difference]: Start difference. First operand has 159 places, 88 transitions, 674 flow. Second operand 12 states and 145 transitions. [2024-06-27 20:23:22,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 114 transitions, 1094 flow [2024-06-27 20:23:22,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 114 transitions, 1007 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 20:23:22,324 INFO L231 Difference]: Finished difference. Result has 152 places, 83 transitions, 616 flow [2024-06-27 20:23:22,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=616, PETRI_PLACES=152, PETRI_TRANSITIONS=83} [2024-06-27 20:23:22,325 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 122 predicate places. [2024-06-27 20:23:22,325 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 83 transitions, 616 flow [2024-06-27 20:23:22,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:22,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:22,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:22,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-27 20:23:22,325 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:22,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash 74388104, now seen corresponding path program 42 times [2024-06-27 20:23:22,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:22,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674133296] [2024-06-27 20:23:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:22,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:23,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:23,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674133296] [2024-06-27 20:23:23,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674133296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:23,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:23,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:23,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733964581] [2024-06-27 20:23:23,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:23,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:23,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:23,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:23,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:23,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:23,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 83 transitions, 616 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:23,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:23,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:23,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:23,655 INFO L124 PetriNetUnfolderBase]: 257/548 cut-off events. [2024-06-27 20:23:23,655 INFO L125 PetriNetUnfolderBase]: For 37701/37701 co-relation queries the response was YES. [2024-06-27 20:23:23,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3089 conditions, 548 events. 257/548 cut-off events. For 37701/37701 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2556 event pairs, 97 based on Foata normal form. 10/556 useless extension candidates. Maximal degree in co-relation 3029. Up to 395 conditions per place. [2024-06-27 20:23:23,658 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 66 selfloop transitions, 26 changer transitions 11/105 dead transitions. [2024-06-27 20:23:23,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 105 transitions, 912 flow [2024-06-27 20:23:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:23,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-27 20:23:23,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-27 20:23:23,659 INFO L175 Difference]: Start difference. First operand has 152 places, 83 transitions, 616 flow. Second operand 12 states and 139 transitions. [2024-06-27 20:23:23,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 105 transitions, 912 flow [2024-06-27 20:23:23,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 105 transitions, 852 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-27 20:23:23,705 INFO L231 Difference]: Finished difference. Result has 145 places, 82 transitions, 609 flow [2024-06-27 20:23:23,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=609, PETRI_PLACES=145, PETRI_TRANSITIONS=82} [2024-06-27 20:23:23,705 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-27 20:23:23,705 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 82 transitions, 609 flow [2024-06-27 20:23:23,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:23,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:23,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:23,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-27 20:23:23,705 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:23,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:23,705 INFO L85 PathProgramCache]: Analyzing trace with hash 100163898, now seen corresponding path program 43 times [2024-06-27 20:23:23,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:23,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168194610] [2024-06-27 20:23:23,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:23,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:24,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:24,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168194610] [2024-06-27 20:23:24,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168194610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:24,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:24,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:24,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946500730] [2024-06-27 20:23:24,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:24,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:24,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:24,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:24,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:24,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:24,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 82 transitions, 609 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:24,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:24,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:24,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:24,989 INFO L124 PetriNetUnfolderBase]: 242/523 cut-off events. [2024-06-27 20:23:24,989 INFO L125 PetriNetUnfolderBase]: For 29669/29669 co-relation queries the response was YES. [2024-06-27 20:23:24,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2785 conditions, 523 events. 242/523 cut-off events. For 29669/29669 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2426 event pairs, 98 based on Foata normal form. 10/531 useless extension candidates. Maximal degree in co-relation 2729. Up to 382 conditions per place. [2024-06-27 20:23:24,992 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 65 selfloop transitions, 23 changer transitions 11/101 dead transitions. [2024-06-27 20:23:24,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 101 transitions, 877 flow [2024-06-27 20:23:24,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:24,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-27 20:23:24,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-27 20:23:24,992 INFO L175 Difference]: Start difference. First operand has 145 places, 82 transitions, 609 flow. Second operand 12 states and 135 transitions. [2024-06-27 20:23:24,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 101 transitions, 877 flow [2024-06-27 20:23:25,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 101 transitions, 823 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-27 20:23:25,035 INFO L231 Difference]: Finished difference. Result has 145 places, 79 transitions, 586 flow [2024-06-27 20:23:25,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=586, PETRI_PLACES=145, PETRI_TRANSITIONS=79} [2024-06-27 20:23:25,035 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-27 20:23:25,035 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 79 transitions, 586 flow [2024-06-27 20:23:25,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:25,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:25,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:25,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-27 20:23:25,036 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:25,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:25,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1917657832, now seen corresponding path program 44 times [2024-06-27 20:23:25,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:25,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052238396] [2024-06-27 20:23:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:25,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:25,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:25,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052238396] [2024-06-27 20:23:25,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052238396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:25,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:25,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:25,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304951497] [2024-06-27 20:23:25,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:25,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:25,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:25,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:25,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:26,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:26,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 79 transitions, 586 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:26,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:26,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:26,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:26,288 INFO L124 PetriNetUnfolderBase]: 230/503 cut-off events. [2024-06-27 20:23:26,289 INFO L125 PetriNetUnfolderBase]: For 27825/27825 co-relation queries the response was YES. [2024-06-27 20:23:26,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2693 conditions, 503 events. 230/503 cut-off events. For 27825/27825 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2325 event pairs, 94 based on Foata normal form. 8/509 useless extension candidates. Maximal degree in co-relation 2637. Up to 366 conditions per place. [2024-06-27 20:23:26,291 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 62 selfloop transitions, 21 changer transitions 12/97 dead transitions. [2024-06-27 20:23:26,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 97 transitions, 832 flow [2024-06-27 20:23:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-27 20:23:26,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2024-06-27 20:23:26,292 INFO L175 Difference]: Start difference. First operand has 145 places, 79 transitions, 586 flow. Second operand 12 states and 133 transitions. [2024-06-27 20:23:26,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 97 transitions, 832 flow [2024-06-27 20:23:26,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 97 transitions, 776 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 20:23:26,322 INFO L231 Difference]: Finished difference. Result has 143 places, 75 transitions, 551 flow [2024-06-27 20:23:26,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=551, PETRI_PLACES=143, PETRI_TRANSITIONS=75} [2024-06-27 20:23:26,322 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2024-06-27 20:23:26,322 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 75 transitions, 551 flow [2024-06-27 20:23:26,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:26,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:26,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:26,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-27 20:23:26,323 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:26,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:26,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1912295452, now seen corresponding path program 45 times [2024-06-27 20:23:26,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:26,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904612415] [2024-06-27 20:23:26,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:26,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:27,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:27,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904612415] [2024-06-27 20:23:27,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904612415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:27,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:27,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:27,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319068553] [2024-06-27 20:23:27,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:27,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:27,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:27,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:27,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:27,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:27,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 75 transitions, 551 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:27,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:27,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:27,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:27,572 INFO L124 PetriNetUnfolderBase]: 200/441 cut-off events. [2024-06-27 20:23:27,572 INFO L125 PetriNetUnfolderBase]: For 20201/20201 co-relation queries the response was YES. [2024-06-27 20:23:27,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2122 conditions, 441 events. 200/441 cut-off events. For 20201/20201 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1952 event pairs, 78 based on Foata normal form. 8/447 useless extension candidates. Maximal degree in co-relation 2067. Up to 336 conditions per place. [2024-06-27 20:23:27,574 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 61 selfloop transitions, 12 changer transitions 17/92 dead transitions. [2024-06-27 20:23:27,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 92 transitions, 781 flow [2024-06-27 20:23:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:27,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 127 transitions. [2024-06-27 20:23:27,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34139784946236557 [2024-06-27 20:23:27,575 INFO L175 Difference]: Start difference. First operand has 143 places, 75 transitions, 551 flow. Second operand 12 states and 127 transitions. [2024-06-27 20:23:27,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 92 transitions, 781 flow [2024-06-27 20:23:27,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 92 transitions, 724 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 20:23:27,617 INFO L231 Difference]: Finished difference. Result has 137 places, 69 transitions, 488 flow [2024-06-27 20:23:27,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=488, PETRI_PLACES=137, PETRI_TRANSITIONS=69} [2024-06-27 20:23:27,617 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2024-06-27 20:23:27,617 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 69 transitions, 488 flow [2024-06-27 20:23:27,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:27,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:27,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:27,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-27 20:23:27,618 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:27,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:27,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1438687814, now seen corresponding path program 46 times [2024-06-27 20:23:27,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:27,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440640239] [2024-06-27 20:23:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:27,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:28,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:28,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440640239] [2024-06-27 20:23:28,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440640239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:28,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:28,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:28,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541578570] [2024-06-27 20:23:28,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:28,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:28,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:28,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:28,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:28,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:28,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 69 transitions, 488 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:28,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:28,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:28,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:28,960 INFO L124 PetriNetUnfolderBase]: 211/464 cut-off events. [2024-06-27 20:23:28,960 INFO L125 PetriNetUnfolderBase]: For 18251/18252 co-relation queries the response was YES. [2024-06-27 20:23:28,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2103 conditions, 464 events. 211/464 cut-off events. For 18251/18252 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2102 event pairs, 54 based on Foata normal form. 9/471 useless extension candidates. Maximal degree in co-relation 2051. Up to 361 conditions per place. [2024-06-27 20:23:28,962 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 66 selfloop transitions, 10 changer transitions 25/103 dead transitions. [2024-06-27 20:23:28,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 103 transitions, 804 flow [2024-06-27 20:23:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:23:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:23:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 140 transitions. [2024-06-27 20:23:28,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34739454094292804 [2024-06-27 20:23:28,963 INFO L175 Difference]: Start difference. First operand has 137 places, 69 transitions, 488 flow. Second operand 13 states and 140 transitions. [2024-06-27 20:23:28,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 103 transitions, 804 flow [2024-06-27 20:23:28,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 103 transitions, 770 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 20:23:28,980 INFO L231 Difference]: Finished difference. Result has 133 places, 69 transitions, 491 flow [2024-06-27 20:23:28,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=491, PETRI_PLACES=133, PETRI_TRANSITIONS=69} [2024-06-27 20:23:28,980 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 103 predicate places. [2024-06-27 20:23:28,980 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 69 transitions, 491 flow [2024-06-27 20:23:28,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:28,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:28,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:28,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-27 20:23:28,980 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:28,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:28,981 INFO L85 PathProgramCache]: Analyzing trace with hash -979276904, now seen corresponding path program 47 times [2024-06-27 20:23:28,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:28,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521264199] [2024-06-27 20:23:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:28,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:29,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521264199] [2024-06-27 20:23:29,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521264199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:29,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:29,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:29,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276929787] [2024-06-27 20:23:29,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:29,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:29,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:29,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:29,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:29,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 69 transitions, 491 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:29,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:29,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:29,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:30,339 INFO L124 PetriNetUnfolderBase]: 208/460 cut-off events. [2024-06-27 20:23:30,340 INFO L125 PetriNetUnfolderBase]: For 14797/14797 co-relation queries the response was YES. [2024-06-27 20:23:30,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2061 conditions, 460 events. 208/460 cut-off events. For 14797/14797 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2071 event pairs, 70 based on Foata normal form. 8/466 useless extension candidates. Maximal degree in co-relation 2007. Up to 358 conditions per place. [2024-06-27 20:23:30,342 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 65 selfloop transitions, 9 changer transitions 25/101 dead transitions. [2024-06-27 20:23:30,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 101 transitions, 805 flow [2024-06-27 20:23:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:23:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:23:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 140 transitions. [2024-06-27 20:23:30,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34739454094292804 [2024-06-27 20:23:30,342 INFO L175 Difference]: Start difference. First operand has 133 places, 69 transitions, 491 flow. Second operand 13 states and 140 transitions. [2024-06-27 20:23:30,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 101 transitions, 805 flow [2024-06-27 20:23:30,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 101 transitions, 761 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-27 20:23:30,357 INFO L231 Difference]: Finished difference. Result has 134 places, 68 transitions, 484 flow [2024-06-27 20:23:30,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=484, PETRI_PLACES=134, PETRI_TRANSITIONS=68} [2024-06-27 20:23:30,357 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2024-06-27 20:23:30,357 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 68 transitions, 484 flow [2024-06-27 20:23:30,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:30,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:30,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:30,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-27 20:23:30,357 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:30,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:30,358 INFO L85 PathProgramCache]: Analyzing trace with hash 328479242, now seen corresponding path program 48 times [2024-06-27 20:23:30,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:30,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954688246] [2024-06-27 20:23:30,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:30,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:31,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:31,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954688246] [2024-06-27 20:23:31,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954688246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:31,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:31,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:23:31,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222139476] [2024-06-27 20:23:31,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:31,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:23:31,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:31,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:23:31,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:23:31,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:31,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 68 transitions, 484 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:31,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:31,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:31,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:31,666 INFO L124 PetriNetUnfolderBase]: 209/467 cut-off events. [2024-06-27 20:23:31,667 INFO L125 PetriNetUnfolderBase]: For 17034/17034 co-relation queries the response was YES. [2024-06-27 20:23:31,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2179 conditions, 467 events. 209/467 cut-off events. For 17034/17034 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2126 event pairs, 64 based on Foata normal form. 8/473 useless extension candidates. Maximal degree in co-relation 2124. Up to 280 conditions per place. [2024-06-27 20:23:31,669 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 70 selfloop transitions, 10 changer transitions 20/102 dead transitions. [2024-06-27 20:23:31,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 102 transitions, 864 flow [2024-06-27 20:23:31,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:23:31,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:23:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 145 transitions. [2024-06-27 20:23:31,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3598014888337469 [2024-06-27 20:23:31,669 INFO L175 Difference]: Start difference. First operand has 134 places, 68 transitions, 484 flow. Second operand 13 states and 145 transitions. [2024-06-27 20:23:31,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 102 transitions, 864 flow [2024-06-27 20:23:31,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 102 transitions, 814 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-27 20:23:31,687 INFO L231 Difference]: Finished difference. Result has 134 places, 68 transitions, 477 flow [2024-06-27 20:23:31,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=477, PETRI_PLACES=134, PETRI_TRANSITIONS=68} [2024-06-27 20:23:31,688 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2024-06-27 20:23:31,688 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 68 transitions, 477 flow [2024-06-27 20:23:31,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:31,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:31,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:31,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-27 20:23:31,688 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:31,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:31,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1029221032, now seen corresponding path program 49 times [2024-06-27 20:23:31,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:31,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107227106] [2024-06-27 20:23:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:31,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:32,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:32,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107227106] [2024-06-27 20:23:32,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107227106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:32,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:32,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:23:32,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502619869] [2024-06-27 20:23:32,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:32,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:23:32,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:32,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:23:32,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:23:32,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:32,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 68 transitions, 477 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:32,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:32,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:32,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:32,892 INFO L124 PetriNetUnfolderBase]: 168/382 cut-off events. [2024-06-27 20:23:32,892 INFO L125 PetriNetUnfolderBase]: For 12226/12226 co-relation queries the response was YES. [2024-06-27 20:23:32,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1647 conditions, 382 events. 168/382 cut-off events. For 12226/12226 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1644 event pairs, 40 based on Foata normal form. 8/388 useless extension candidates. Maximal degree in co-relation 1592. Up to 286 conditions per place. [2024-06-27 20:23:32,894 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 54 selfloop transitions, 7 changer transitions 27/90 dead transitions. [2024-06-27 20:23:32,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 90 transitions, 713 flow [2024-06-27 20:23:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 127 transitions. [2024-06-27 20:23:32,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34139784946236557 [2024-06-27 20:23:32,894 INFO L175 Difference]: Start difference. First operand has 134 places, 68 transitions, 477 flow. Second operand 12 states and 127 transitions. [2024-06-27 20:23:32,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 90 transitions, 713 flow [2024-06-27 20:23:32,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 90 transitions, 681 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-27 20:23:32,909 INFO L231 Difference]: Finished difference. Result has 130 places, 59 transitions, 402 flow [2024-06-27 20:23:32,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=402, PETRI_PLACES=130, PETRI_TRANSITIONS=59} [2024-06-27 20:23:32,909 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2024-06-27 20:23:32,909 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 59 transitions, 402 flow [2024-06-27 20:23:32,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:32,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:32,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:32,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-27 20:23:32,910 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:32,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:32,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1156927791, now seen corresponding path program 1 times [2024-06-27 20:23:32,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:32,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778889135] [2024-06-27 20:23:32,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:32,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:34,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:34,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778889135] [2024-06-27 20:23:34,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778889135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:34,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:34,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:23:34,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691296690] [2024-06-27 20:23:34,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:34,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:23:34,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:34,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:23:34,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:23:34,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:34,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 59 transitions, 402 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:34,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:34,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:34,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:34,965 INFO L124 PetriNetUnfolderBase]: 140/320 cut-off events. [2024-06-27 20:23:34,965 INFO L125 PetriNetUnfolderBase]: For 11008/11008 co-relation queries the response was YES. [2024-06-27 20:23:34,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1427 conditions, 320 events. 140/320 cut-off events. For 11008/11008 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1286 event pairs, 41 based on Foata normal form. 6/324 useless extension candidates. Maximal degree in co-relation 1376. Up to 185 conditions per place. [2024-06-27 20:23:34,967 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 39 selfloop transitions, 9 changer transitions 27/77 dead transitions. [2024-06-27 20:23:34,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 77 transitions, 600 flow [2024-06-27 20:23:34,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:34,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:34,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 124 transitions. [2024-06-27 20:23:34,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-27 20:23:34,967 INFO L175 Difference]: Start difference. First operand has 130 places, 59 transitions, 402 flow. Second operand 12 states and 124 transitions. [2024-06-27 20:23:34,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 77 transitions, 600 flow [2024-06-27 20:23:34,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 77 transitions, 526 flow, removed 11 selfloop flow, removed 18 redundant places. [2024-06-27 20:23:34,979 INFO L231 Difference]: Finished difference. Result has 110 places, 47 transitions, 286 flow [2024-06-27 20:23:34,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=286, PETRI_PLACES=110, PETRI_TRANSITIONS=47} [2024-06-27 20:23:34,979 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2024-06-27 20:23:34,979 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 47 transitions, 286 flow [2024-06-27 20:23:34,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:34,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:34,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:34,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-27 20:23:34,979 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:34,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:34,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1403986401, now seen corresponding path program 2 times [2024-06-27 20:23:34,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:34,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273542811] [2024-06-27 20:23:34,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:34,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:36,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:36,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273542811] [2024-06-27 20:23:36,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273542811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:36,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:36,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:23:36,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86181181] [2024-06-27 20:23:36,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:36,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:23:36,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:36,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:23:36,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:23:36,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:36,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 47 transitions, 286 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:36,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:36,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:36,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:36,672 INFO L124 PetriNetUnfolderBase]: 115/258 cut-off events. [2024-06-27 20:23:36,672 INFO L125 PetriNetUnfolderBase]: For 8122/8122 co-relation queries the response was YES. [2024-06-27 20:23:36,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 258 events. 115/258 cut-off events. For 8122/8122 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 952 event pairs, 36 based on Foata normal form. 6/263 useless extension candidates. Maximal degree in co-relation 1054. Up to 167 conditions per place. [2024-06-27 20:23:36,673 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 34 selfloop transitions, 8 changer transitions 19/63 dead transitions. [2024-06-27 20:23:36,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 63 transitions, 446 flow [2024-06-27 20:23:36,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:36,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 119 transitions. [2024-06-27 20:23:36,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31989247311827956 [2024-06-27 20:23:36,674 INFO L175 Difference]: Start difference. First operand has 110 places, 47 transitions, 286 flow. Second operand 12 states and 119 transitions. [2024-06-27 20:23:36,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 63 transitions, 446 flow [2024-06-27 20:23:36,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 63 transitions, 410 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-27 20:23:36,678 INFO L231 Difference]: Finished difference. Result has 91 places, 40 transitions, 236 flow [2024-06-27 20:23:36,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=236, PETRI_PLACES=91, PETRI_TRANSITIONS=40} [2024-06-27 20:23:36,679 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 61 predicate places. [2024-06-27 20:23:36,679 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 40 transitions, 236 flow [2024-06-27 20:23:36,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:36,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:36,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:36,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-27 20:23:36,680 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:36,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:36,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1888380407, now seen corresponding path program 3 times [2024-06-27 20:23:36,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:36,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106828634] [2024-06-27 20:23:36,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:36,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:38,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:38,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106828634] [2024-06-27 20:23:38,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106828634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:38,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:38,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:23:38,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93554769] [2024-06-27 20:23:38,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:38,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:23:38,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:38,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:23:38,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:23:38,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:38,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 40 transitions, 236 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:38,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:38,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:38,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:38,511 INFO L124 PetriNetUnfolderBase]: 100/225 cut-off events. [2024-06-27 20:23:38,512 INFO L125 PetriNetUnfolderBase]: For 5204/5204 co-relation queries the response was YES. [2024-06-27 20:23:38,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 225 events. 100/225 cut-off events. For 5204/5204 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 789 event pairs, 34 based on Foata normal form. 6/230 useless extension candidates. Maximal degree in co-relation 886. Up to 149 conditions per place. [2024-06-27 20:23:38,513 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 30 selfloop transitions, 7 changer transitions 17/56 dead transitions. [2024-06-27 20:23:38,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 56 transitions, 382 flow [2024-06-27 20:23:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 117 transitions. [2024-06-27 20:23:38,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31451612903225806 [2024-06-27 20:23:38,514 INFO L175 Difference]: Start difference. First operand has 91 places, 40 transitions, 236 flow. Second operand 12 states and 117 transitions. [2024-06-27 20:23:38,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 56 transitions, 382 flow [2024-06-27 20:23:38,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 56 transitions, 354 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-27 20:23:38,518 INFO L231 Difference]: Finished difference. Result has 80 places, 34 transitions, 196 flow [2024-06-27 20:23:38,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=68, 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=12, PETRI_FLOW=196, PETRI_PLACES=80, PETRI_TRANSITIONS=34} [2024-06-27 20:23:38,518 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2024-06-27 20:23:38,518 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 34 transitions, 196 flow [2024-06-27 20:23:38,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:38,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:38,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:38,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-27 20:23:38,519 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:38,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:38,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1746713063, now seen corresponding path program 4 times [2024-06-27 20:23:38,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:38,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330622072] [2024-06-27 20:23:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:38,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:39,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:39,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330622072] [2024-06-27 20:23:39,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330622072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:39,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:39,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:23:39,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454734298] [2024-06-27 20:23:39,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:39,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:23:39,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:39,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:23:39,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:23:39,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:39,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 34 transitions, 196 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:39,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:39,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:39,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:40,100 INFO L124 PetriNetUnfolderBase]: 86/195 cut-off events. [2024-06-27 20:23:40,100 INFO L125 PetriNetUnfolderBase]: For 3264/3264 co-relation queries the response was YES. [2024-06-27 20:23:40,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 195 events. 86/195 cut-off events. For 3264/3264 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 644 event pairs, 32 based on Foata normal form. 6/200 useless extension candidates. Maximal degree in co-relation 740. Up to 131 conditions per place. [2024-06-27 20:23:40,101 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 25 selfloop transitions, 6 changer transitions 16/49 dead transitions. [2024-06-27 20:23:40,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 49 transitions, 324 flow [2024-06-27 20:23:40,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 113 transitions. [2024-06-27 20:23:40,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30376344086021506 [2024-06-27 20:23:40,102 INFO L175 Difference]: Start difference. First operand has 80 places, 34 transitions, 196 flow. Second operand 12 states and 113 transitions. [2024-06-27 20:23:40,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 49 transitions, 324 flow [2024-06-27 20:23:40,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 49 transitions, 300 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 20:23:40,104 INFO L231 Difference]: Finished difference. Result has 71 places, 29 transitions, 159 flow [2024-06-27 20:23:40,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=159, PETRI_PLACES=71, PETRI_TRANSITIONS=29} [2024-06-27 20:23:40,105 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2024-06-27 20:23:40,105 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 29 transitions, 159 flow [2024-06-27 20:23:40,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:40,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:40,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:40,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-27 20:23:40,105 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:40,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:40,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1642990489, now seen corresponding path program 5 times [2024-06-27 20:23:40,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:40,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469899869] [2024-06-27 20:23:40,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:40,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:41,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:41,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469899869] [2024-06-27 20:23:41,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469899869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:41,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:41,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:23:41,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435638056] [2024-06-27 20:23:41,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:41,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:23:41,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:41,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:23:41,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:23:41,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:41,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 29 transitions, 159 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:41,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:41,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:41,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:41,672 INFO L124 PetriNetUnfolderBase]: 58/135 cut-off events. [2024-06-27 20:23:41,672 INFO L125 PetriNetUnfolderBase]: For 1372/1372 co-relation queries the response was YES. [2024-06-27 20:23:41,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 135 events. 58/135 cut-off events. For 1372/1372 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 17 based on Foata normal form. 6/140 useless extension candidates. Maximal degree in co-relation 450. Up to 60 conditions per place. [2024-06-27 20:23:41,672 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 18 selfloop transitions, 7 changer transitions 16/43 dead transitions. [2024-06-27 20:23:41,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 43 transitions, 273 flow [2024-06-27 20:23:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:41,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 112 transitions. [2024-06-27 20:23:41,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3010752688172043 [2024-06-27 20:23:41,673 INFO L175 Difference]: Start difference. First operand has 71 places, 29 transitions, 159 flow. Second operand 12 states and 112 transitions. [2024-06-27 20:23:41,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 43 transitions, 273 flow [2024-06-27 20:23:41,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 43 transitions, 253 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 20:23:41,674 INFO L231 Difference]: Finished difference. Result has 64 places, 22 transitions, 110 flow [2024-06-27 20:23:41,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=110, PETRI_PLACES=64, PETRI_TRANSITIONS=22} [2024-06-27 20:23:41,674 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2024-06-27 20:23:41,674 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 22 transitions, 110 flow [2024-06-27 20:23:41,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:41,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:41,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:41,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-27 20:23:41,675 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:23:41,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:41,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1975077741, now seen corresponding path program 6 times [2024-06-27 20:23:41,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:41,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860766281] [2024-06-27 20:23:41,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:41,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:42,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:42,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860766281] [2024-06-27 20:23:42,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860766281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:42,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:42,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 20:23:42,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519437690] [2024-06-27 20:23:42,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:42,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 20:23:42,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:42,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 20:23:42,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-27 20:23:43,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-27 20:23:43,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 22 transitions, 110 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:43,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:43,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-27 20:23:43,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:43,320 INFO L124 PetriNetUnfolderBase]: 27/70 cut-off events. [2024-06-27 20:23:43,320 INFO L125 PetriNetUnfolderBase]: For 440/440 co-relation queries the response was YES. [2024-06-27 20:23:43,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 70 events. 27/70 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 102 event pairs, 0 based on Foata normal form. 6/75 useless extension candidates. Maximal degree in co-relation 186. Up to 24 conditions per place. [2024-06-27 20:23:43,320 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2024-06-27 20:23:43,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 32 transitions, 166 flow [2024-06-27 20:23:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:23:43,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:23:43,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 103 transitions. [2024-06-27 20:23:43,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2768817204301075 [2024-06-27 20:23:43,321 INFO L175 Difference]: Start difference. First operand has 64 places, 22 transitions, 110 flow. Second operand 12 states and 103 transitions. [2024-06-27 20:23:43,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 32 transitions, 166 flow [2024-06-27 20:23:43,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 32 transitions, 130 flow, removed 1 selfloop flow, removed 18 redundant places. [2024-06-27 20:23:43,321 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2024-06-27 20:23:43,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2024-06-27 20:23:43,321 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-27 20:23:43,322 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2024-06-27 20:23:43,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:43,324 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-27 20:23:43,324 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-27 20:23:43,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-27 20:23:43,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-27 20:23:43,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-27 20:23:43,325 INFO L445 BasicCegarLoop]: Path program histogram: [49, 35, 17, 13, 10, 10, 7, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:43,327 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 20:23:43,327 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 20:23:43,330 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 20:23:43,331 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 20:23:43,331 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 08:23:43 BasicIcfg [2024-06-27 20:23:43,331 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 20:23:43,332 INFO L158 Benchmark]: Toolchain (without parser) took 274974.54ms. Allocated memory was 140.5MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 78.7MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 111.1MB. Max. memory is 16.1GB. [2024-06-27 20:23:43,332 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 140.5MB. Free memory is still 101.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 20:23:43,332 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 140.5MB. Free memory is still 84.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 20:23:43,332 INFO L158 Benchmark]: CACSL2BoogieTranslator took 528.71ms. Allocated memory was 140.5MB in the beginning and 180.4MB in the end (delta: 39.8MB). Free memory was 78.4MB in the beginning and 137.6MB in the end (delta: -59.1MB). Peak memory consumption was 26.8MB. Max. memory is 16.1GB. [2024-06-27 20:23:43,333 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.32ms. Allocated memory is still 180.4MB. Free memory was 137.6MB in the beginning and 135.5MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-27 20:23:43,333 INFO L158 Benchmark]: Boogie Preprocessor took 53.36ms. Allocated memory is still 180.4MB. Free memory was 135.5MB in the beginning and 132.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 20:23:43,333 INFO L158 Benchmark]: RCFGBuilder took 564.99ms. Allocated memory is still 180.4MB. Free memory was 131.3MB in the beginning and 82.0MB in the end (delta: 49.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2024-06-27 20:23:43,333 INFO L158 Benchmark]: TraceAbstraction took 273784.61ms. Allocated memory was 180.4MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 82.0MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 71.7MB. Max. memory is 16.1GB. [2024-06-27 20:23:43,334 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 140.5MB. Free memory is still 101.0MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.14ms. Allocated memory is still 140.5MB. Free memory is still 84.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 528.71ms. Allocated memory was 140.5MB in the beginning and 180.4MB in the end (delta: 39.8MB). Free memory was 78.4MB in the beginning and 137.6MB in the end (delta: -59.1MB). Peak memory consumption was 26.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.32ms. Allocated memory is still 180.4MB. Free memory was 137.6MB in the beginning and 135.5MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.36ms. Allocated memory is still 180.4MB. Free memory was 135.5MB in the beginning and 132.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 564.99ms. Allocated memory is still 180.4MB. Free memory was 131.3MB in the beginning and 82.0MB in the end (delta: 49.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. * TraceAbstraction took 273784.61ms. Allocated memory was 180.4MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 82.0MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 71.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 820]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 821]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 50 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 273.7s, OverallIterations: 195, TraceHistogramMax: 1, PathProgramHistogramMax: 49, EmptinessCheckTime: 0.0s, AutomataDifference: 124.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14484 SdHoareTripleChecker+Valid, 48.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12334 mSDsluCounter, 10438 SdHoareTripleChecker+Invalid, 42.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9390 mSDsCounter, 3308 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 84420 IncrementalHoareTripleChecker+Invalid, 87728 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3308 mSolverCounterUnsat, 1048 mSDtfsCounter, 84420 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2375 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5796 ImplicationChecksByTransitivity, 66.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3138occurred in iteration=119, InterpolantAutomatonStates: 2078, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 146.9s InterpolantComputationTime, 3184 NumberOfCodeBlocks, 3184 NumberOfCodeBlocksAsserted, 195 NumberOfCheckSat, 2989 ConstructedInterpolants, 0 QuantifiedInterpolants, 139512 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 195 InterpolantComputations, 195 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-27 20:23:43,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE