./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix045_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix045_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix045_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix045_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:56:16,044 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:56:16,105 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:56:16,108 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:56:16,109 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:56:16,133 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:56:16,134 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:56:16,134 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:56:16,134 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:56:16,137 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:56:16,138 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:56:16,138 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:56:16,139 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:56:16,140 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:56:16,140 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:56:16,140 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:56:16,140 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:56:16,140 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:56:16,141 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:56:16,141 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:56:16,141 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:56:16,141 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:56:16,142 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:56:16,142 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:56:16,142 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:56:16,142 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:56:16,142 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:56:16,143 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:56:16,143 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:56:16,143 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:56:16,144 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:56:16,144 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:56:16,144 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:56:16,145 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:56:16,145 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:56:16,145 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:56:16,145 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:56:16,145 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:56:16,146 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:56:16,146 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:56:16,146 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:56:16,146 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:56:16,146 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:56:16,146 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:56:16,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:56:16,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:56:16,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:56:16,378 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:56:16,379 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:56:16,380 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix045_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:56:17,538 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:56:17,789 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:56:17,790 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix045_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:56:17,806 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f402396f4/18e99153a25e400dac9b8659c54289e9/FLAG6112efa41 [2024-06-21 16:56:17,821 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f402396f4/18e99153a25e400dac9b8659c54289e9 [2024-06-21 16:56:17,823 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:56:17,823 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:56:17,825 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix045_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 16:56:17,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:56:17,979 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:56:17,980 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:56:17,980 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:56:17,984 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:56:17,984 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:56:17" (1/2) ... [2024-06-21 16:56:17,986 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a8ff92b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:56:17, skipping insertion in model container [2024-06-21 16:56:17,986 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:56:17" (1/2) ... [2024-06-21 16:56:17,987 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9c2b8ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:56:17, skipping insertion in model container [2024-06-21 16:56:17,987 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:56:17" (2/2) ... [2024-06-21 16:56:17,988 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a8ff92b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:56:17, skipping insertion in model container [2024-06-21 16:56:17,988 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:56:17" (2/2) ... [2024-06-21 16:56:17,988 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:56:18,051 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:56:18,053 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((! multithreaded || a$r_buff1_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 16:56:18,053 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] ((((((((((((((((((! multithreaded || a$r_buff1_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 16:56:18,053 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((! multithreaded || a$r_buff1_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 16:56:18,053 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:56:18,054 INFO L106 edCorrectnessWitness]: ghost_update [L842-L842] multithreaded = 1; [2024-06-21 16:56:18,089 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:56:18,353 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:56:18,367 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:56:18,526 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:56:18,554 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:56:18,555 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:56:18 WrapperNode [2024-06-21 16:56:18,555 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:56:18,556 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:56:18,556 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:56:18,556 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:56:18,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:56:18" (1/1) ... [2024-06-21 16:56:18,573 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:56:18" (1/1) ... [2024-06-21 16:56:18,595 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-21 16:56:18,595 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:56:18,596 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:56:18,596 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:56:18,596 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:56:18,604 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:56:18" (1/1) ... [2024-06-21 16:56:18,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:56:18" (1/1) ... [2024-06-21 16:56:18,608 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:56:18" (1/1) ... [2024-06-21 16:56:18,619 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 16:56:18,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:56:18" (1/1) ... [2024-06-21 16:56:18,620 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:56:18" (1/1) ... [2024-06-21 16:56:18,625 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:56:18" (1/1) ... [2024-06-21 16:56:18,626 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:56:18" (1/1) ... [2024-06-21 16:56:18,628 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:56:18" (1/1) ... [2024-06-21 16:56:18,629 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:56:18" (1/1) ... [2024-06-21 16:56:18,631 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:56:18,632 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:56:18,632 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:56:18,632 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:56:18,632 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:56:18" (1/1) ... [2024-06-21 16:56:18,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:56:18,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:56:18,652 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 16:56:18,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 16:56:18,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:56:18,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:56:18,685 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:56:18,685 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:56:18,685 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:56:18,685 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:56:18,685 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:56:18,686 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:56:18,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:56:18,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:56:18,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:56:18,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:56:18,687 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:56:18,773 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:56:18,774 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:56:19,082 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:56:19,083 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:56:19,194 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:56:19,200 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:56:19,201 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:56:19 BoogieIcfgContainer [2024-06-21 16:56:19,201 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:56:19,202 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:56:19,203 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:56:19,205 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:56:19,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:56:17" (1/4) ... [2024-06-21 16:56:19,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad4e450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:56:19, skipping insertion in model container [2024-06-21 16:56:19,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:56:17" (2/4) ... [2024-06-21 16:56:19,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad4e450 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:56:19, skipping insertion in model container [2024-06-21 16:56:19,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:56:18" (3/4) ... [2024-06-21 16:56:19,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad4e450 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:56:19, skipping insertion in model container [2024-06-21 16:56:19,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:56:19" (4/4) ... [2024-06-21 16:56:19,209 INFO L112 eAbstractionObserver]: Analyzing ICFG mix045_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:56:19,221 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:56:19,221 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 16:56:19,221 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:56:19,269 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:56:19,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 16:56:19,324 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 16:56:19,324 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:56:19,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:56:19,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 16:56:19,328 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 16:56:19,342 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:56:19,350 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;@c84458b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:56:19,350 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 16:56:19,352 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:56:19,352 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:56:19,352 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:56:19,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:19,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:56:19,353 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:19,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:19,357 INFO L85 PathProgramCache]: Analyzing trace with hash 375457951, now seen corresponding path program 1 times [2024-06-21 16:56:19,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:19,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089336566] [2024-06-21 16:56:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:19,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:20,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:20,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089336566] [2024-06-21 16:56:20,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089336566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:20,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:20,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:56:20,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517978435] [2024-06-21 16:56:20,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:20,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:56:20,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:20,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:56:20,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:56:20,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:56:20,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:20,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:20,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:56:20,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:20,798 INFO L124 PetriNetUnfolderBase]: 1911/2909 cut-off events. [2024-06-21 16:56:20,798 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 16:56:20,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5833 conditions, 2909 events. 1911/2909 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13861 event pairs, 1379 based on Foata normal form. 1/2833 useless extension candidates. Maximal degree in co-relation 5821. Up to 2825 conditions per place. [2024-06-21 16:56:20,815 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 16:56:20,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 177 flow [2024-06-21 16:56:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:56:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:56:20,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-21 16:56:20,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-21 16:56:20,825 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 74 transitions. [2024-06-21 16:56:20,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 177 flow [2024-06-21 16:56:20,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:56:20,829 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 16:56:20,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 16:56:20,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 16:56:20,833 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 16:56:20,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:20,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:20,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:20,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:56:20,834 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:20,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:20,834 INFO L85 PathProgramCache]: Analyzing trace with hash 37881534, now seen corresponding path program 1 times [2024-06-21 16:56:20,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:20,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140685433] [2024-06-21 16:56:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:20,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:21,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:21,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140685433] [2024-06-21 16:56:21,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140685433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:21,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:21,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:56:21,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87399595] [2024-06-21 16:56:21,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:21,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:56:21,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:21,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:56:21,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:56:21,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:56:21,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:21,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:21,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:56:21,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:21,667 INFO L124 PetriNetUnfolderBase]: 1905/2900 cut-off events. [2024-06-21 16:56:21,668 INFO L125 PetriNetUnfolderBase]: For 518/518 co-relation queries the response was YES. [2024-06-21 16:56:21,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6521 conditions, 2900 events. 1905/2900 cut-off events. For 518/518 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13853 event pairs, 1212 based on Foata normal form. 3/2866 useless extension candidates. Maximal degree in co-relation 6509. Up to 2801 conditions per place. [2024-06-21 16:56:21,679 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 41 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 16:56:21,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 244 flow [2024-06-21 16:56:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:56:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:56:21,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-21 16:56:21,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-21 16:56:21,681 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 95 transitions. [2024-06-21 16:56:21,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 244 flow [2024-06-21 16:56:21,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:56:21,683 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 16:56:21,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 16:56:21,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 16:56:21,684 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 16:56:21,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:21,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:21,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:21,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:56:21,685 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:21,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1174328974, now seen corresponding path program 1 times [2024-06-21 16:56:21,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:21,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603392493] [2024-06-21 16:56:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:21,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:22,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:22,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603392493] [2024-06-21 16:56:22,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603392493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:22,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:22,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:56:22,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792626488] [2024-06-21 16:56:22,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:22,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:56:22,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:22,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:56:22,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:56:22,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:56:22,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:22,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:22,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:56:22,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:22,562 INFO L124 PetriNetUnfolderBase]: 1913/2918 cut-off events. [2024-06-21 16:56:22,563 INFO L125 PetriNetUnfolderBase]: For 1479/1479 co-relation queries the response was YES. [2024-06-21 16:56:22,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7248 conditions, 2918 events. 1913/2918 cut-off events. For 1479/1479 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13971 event pairs, 951 based on Foata normal form. 5/2891 useless extension candidates. Maximal degree in co-relation 7234. Up to 2747 conditions per place. [2024-06-21 16:56:22,575 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 54 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-21 16:56:22,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 398 flow [2024-06-21 16:56:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:56:22,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:56:22,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-21 16:56:22,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-21 16:56:22,577 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 124 transitions. [2024-06-21 16:56:22,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 398 flow [2024-06-21 16:56:22,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 384 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 16:56:22,580 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-21 16:56:22,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-21 16:56:22,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 16:56:22,581 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-21 16:56:22,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:22,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:22,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:22,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:56:22,581 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:22,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:22,582 INFO L85 PathProgramCache]: Analyzing trace with hash -2111977869, now seen corresponding path program 1 times [2024-06-21 16:56:22,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:22,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983057270] [2024-06-21 16:56:22,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:22,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:23,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:23,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983057270] [2024-06-21 16:56:23,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983057270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:23,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:23,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:56:23,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715896168] [2024-06-21 16:56:23,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:23,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:56:23,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:23,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:56:23,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:56:23,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:56:23,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:23,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:23,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:56:23,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:23,877 INFO L124 PetriNetUnfolderBase]: 1921/2930 cut-off events. [2024-06-21 16:56:23,878 INFO L125 PetriNetUnfolderBase]: For 3456/3458 co-relation queries the response was YES. [2024-06-21 16:56:23,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8493 conditions, 2930 events. 1921/2930 cut-off events. For 3456/3458 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13976 event pairs, 784 based on Foata normal form. 7/2905 useless extension candidates. Maximal degree in co-relation 8476. Up to 2733 conditions per place. [2024-06-21 16:56:23,892 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 61 selfloop transitions, 20 changer transitions 0/86 dead transitions. [2024-06-21 16:56:23,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 525 flow [2024-06-21 16:56:23,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:56:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:56:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 16:56:23,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-21 16:56:23,894 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 146 transitions. [2024-06-21 16:56:23,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 525 flow [2024-06-21 16:56:23,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 517 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 16:56:23,897 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 310 flow [2024-06-21 16:56:23,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-21 16:56:23,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 16:56:23,898 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 310 flow [2024-06-21 16:56:23,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:23,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:23,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:23,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:56:23,899 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:23,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:23,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1046208371, now seen corresponding path program 1 times [2024-06-21 16:56:23,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:23,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77899421] [2024-06-21 16:56:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:23,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:24,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:24,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77899421] [2024-06-21 16:56:24,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77899421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:24,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:24,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:56:24,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047284426] [2024-06-21 16:56:24,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:24,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:56:24,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:24,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:56:24,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:56:24,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:56:24,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:24,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:24,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:56:24,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:25,384 INFO L124 PetriNetUnfolderBase]: 1933/2950 cut-off events. [2024-06-21 16:56:25,384 INFO L125 PetriNetUnfolderBase]: For 5435/5437 co-relation queries the response was YES. [2024-06-21 16:56:25,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9454 conditions, 2950 events. 1933/2950 cut-off events. For 5435/5437 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 14081 event pairs, 596 based on Foata normal form. 12/2930 useless extension candidates. Maximal degree in co-relation 9434. Up to 2701 conditions per place. [2024-06-21 16:56:25,399 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 65 selfloop transitions, 23 changer transitions 0/93 dead transitions. [2024-06-21 16:56:25,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 93 transitions, 626 flow [2024-06-21 16:56:25,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:25,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 16:56:25,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-21 16:56:25,401 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 310 flow. Second operand 7 states and 164 transitions. [2024-06-21 16:56:25,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 93 transitions, 626 flow [2024-06-21 16:56:25,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 577 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:56:25,406 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 337 flow [2024-06-21 16:56:25,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=337, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-21 16:56:25,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 16:56:25,407 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 337 flow [2024-06-21 16:56:25,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:25,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:25,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:25,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:56:25,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:25,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:25,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1941900936, now seen corresponding path program 1 times [2024-06-21 16:56:25,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:25,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548424350] [2024-06-21 16:56:25,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:25,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:25,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:25,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548424350] [2024-06-21 16:56:25,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548424350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:25,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:25,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:56:25,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136535830] [2024-06-21 16:56:25,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:25,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:56:25,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:25,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:56:25,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:56:25,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:25,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:25,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:25,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:25,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:26,305 INFO L124 PetriNetUnfolderBase]: 1928/2939 cut-off events. [2024-06-21 16:56:26,306 INFO L125 PetriNetUnfolderBase]: For 7382/7382 co-relation queries the response was YES. [2024-06-21 16:56:26,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10049 conditions, 2939 events. 1928/2939 cut-off events. For 7382/7382 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13979 event pairs, 776 based on Foata normal form. 2/2906 useless extension candidates. Maximal degree in co-relation 10027. Up to 2844 conditions per place. [2024-06-21 16:56:26,320 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 55 selfloop transitions, 8 changer transitions 0/67 dead transitions. [2024-06-21 16:56:26,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 491 flow [2024-06-21 16:56:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:56:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:56:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-21 16:56:26,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-21 16:56:26,321 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 337 flow. Second operand 5 states and 92 transitions. [2024-06-21 16:56:26,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 491 flow [2024-06-21 16:56:26,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 427 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 16:56:26,347 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 297 flow [2024-06-21 16:56:26,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-21 16:56:26,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 16:56:26,348 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 297 flow [2024-06-21 16:56:26,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:26,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:26,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:26,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:56:26,349 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:26,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:26,349 INFO L85 PathProgramCache]: Analyzing trace with hash -69673986, now seen corresponding path program 1 times [2024-06-21 16:56:26,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:26,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540486019] [2024-06-21 16:56:26,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:26,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:26,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:26,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540486019] [2024-06-21 16:56:26,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540486019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:26,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:26,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:56:26,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470607892] [2024-06-21 16:56:26,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:26,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:56:26,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:26,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:56:26,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:56:26,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:26,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:26,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:26,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:26,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:27,425 INFO L124 PetriNetUnfolderBase]: 1932/2969 cut-off events. [2024-06-21 16:56:27,425 INFO L125 PetriNetUnfolderBase]: For 8815/8815 co-relation queries the response was YES. [2024-06-21 16:56:27,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10111 conditions, 2969 events. 1932/2969 cut-off events. For 8815/8815 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14198 event pairs, 727 based on Foata normal form. 6/2974 useless extension candidates. Maximal degree in co-relation 10087. Up to 2802 conditions per place. [2024-06-21 16:56:27,442 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 17 changer transitions 0/86 dead transitions. [2024-06-21 16:56:27,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 591 flow [2024-06-21 16:56:27,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:56:27,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:56:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 16:56:27,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 16:56:27,444 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 297 flow. Second operand 6 states and 116 transitions. [2024-06-21 16:56:27,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 591 flow [2024-06-21 16:56:27,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 569 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 16:56:27,448 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 406 flow [2024-06-21 16:56:27,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=406, PETRI_PLACES=63, PETRI_TRANSITIONS=67} [2024-06-21 16:56:27,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-21 16:56:27,449 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 406 flow [2024-06-21 16:56:27,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:27,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:27,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:27,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:56:27,450 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:27,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:27,450 INFO L85 PathProgramCache]: Analyzing trace with hash 417428651, now seen corresponding path program 1 times [2024-06-21 16:56:27,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:27,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251450963] [2024-06-21 16:56:27,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:27,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:28,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:28,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251450963] [2024-06-21 16:56:28,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251450963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:28,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:28,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:56:28,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288475940] [2024-06-21 16:56:28,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:28,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:56:28,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:28,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:56:28,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:56:28,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:28,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 406 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:28,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:28,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:28,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:28,407 INFO L124 PetriNetUnfolderBase]: 1938/2988 cut-off events. [2024-06-21 16:56:28,408 INFO L125 PetriNetUnfolderBase]: For 12342/12346 co-relation queries the response was YES. [2024-06-21 16:56:28,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11223 conditions, 2988 events. 1938/2988 cut-off events. For 12342/12346 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14405 event pairs, 750 based on Foata normal form. 8/2994 useless extension candidates. Maximal degree in co-relation 11197. Up to 2784 conditions per place. [2024-06-21 16:56:28,422 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 67 selfloop transitions, 19 changer transitions 0/90 dead transitions. [2024-06-21 16:56:28,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 90 transitions, 678 flow [2024-06-21 16:56:28,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:56:28,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:56:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-21 16:56:28,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 16:56:28,424 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 406 flow. Second operand 6 states and 117 transitions. [2024-06-21 16:56:28,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 90 transitions, 678 flow [2024-06-21 16:56:28,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 90 transitions, 660 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 16:56:28,431 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 460 flow [2024-06-21 16:56:28,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=460, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2024-06-21 16:56:28,432 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-21 16:56:28,432 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 460 flow [2024-06-21 16:56:28,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:28,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:28,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:28,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:56:28,433 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:28,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:28,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2144004311, now seen corresponding path program 2 times [2024-06-21 16:56:28,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:28,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675142564] [2024-06-21 16:56:28,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:28,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:29,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:29,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675142564] [2024-06-21 16:56:29,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675142564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:29,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:29,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:56:29,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019812177] [2024-06-21 16:56:29,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:29,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:56:29,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:29,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:56:29,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:56:29,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:29,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 460 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:29,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:29,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:29,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:29,538 INFO L124 PetriNetUnfolderBase]: 1923/2962 cut-off events. [2024-06-21 16:56:29,539 INFO L125 PetriNetUnfolderBase]: For 13824/13824 co-relation queries the response was YES. [2024-06-21 16:56:29,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11342 conditions, 2962 events. 1923/2962 cut-off events. For 13824/13824 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14225 event pairs, 746 based on Foata normal form. 2/2962 useless extension candidates. Maximal degree in co-relation 11313. Up to 2825 conditions per place. [2024-06-21 16:56:29,553 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 70 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2024-06-21 16:56:29,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 85 transitions, 660 flow [2024-06-21 16:56:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:56:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:56:29,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 16:56:29,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:56:29,555 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 460 flow. Second operand 6 states and 108 transitions. [2024-06-21 16:56:29,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 85 transitions, 660 flow [2024-06-21 16:56:29,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 85 transitions, 631 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:56:29,565 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 461 flow [2024-06-21 16:56:29,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=461, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2024-06-21 16:56:29,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-21 16:56:29,573 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 461 flow [2024-06-21 16:56:29,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:29,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:29,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:29,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:56:29,574 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:29,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:29,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1849465907, now seen corresponding path program 1 times [2024-06-21 16:56:29,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:29,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74550636] [2024-06-21 16:56:29,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:29,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:30,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:30,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74550636] [2024-06-21 16:56:30,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74550636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:30,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:30,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:30,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867523540] [2024-06-21 16:56:30,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:30,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:30,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:30,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:30,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:30,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:30,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 461 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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) [2024-06-21 16:56:30,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:30,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:30,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:30,762 INFO L124 PetriNetUnfolderBase]: 2091/3195 cut-off events. [2024-06-21 16:56:30,763 INFO L125 PetriNetUnfolderBase]: For 17123/17123 co-relation queries the response was YES. [2024-06-21 16:56:30,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12468 conditions, 3195 events. 2091/3195 cut-off events. For 17123/17123 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15260 event pairs, 644 based on Foata normal form. 12/3206 useless extension candidates. Maximal degree in co-relation 12438. Up to 2721 conditions per place. [2024-06-21 16:56:30,783 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 87 selfloop transitions, 31 changer transitions 0/122 dead transitions. [2024-06-21 16:56:30,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 122 transitions, 987 flow [2024-06-21 16:56:30,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 16:56:30,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-21 16:56:30,785 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 461 flow. Second operand 7 states and 146 transitions. [2024-06-21 16:56:30,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 122 transitions, 987 flow [2024-06-21 16:56:30,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 122 transitions, 940 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:56:30,795 INFO L231 Difference]: Finished difference. Result has 75 places, 89 transitions, 662 flow [2024-06-21 16:56:30,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=662, PETRI_PLACES=75, PETRI_TRANSITIONS=89} [2024-06-21 16:56:30,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-21 16:56:30,798 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 89 transitions, 662 flow [2024-06-21 16:56:30,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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) [2024-06-21 16:56:30,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:30,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:30,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:56:30,798 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:30,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:30,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2039625387, now seen corresponding path program 2 times [2024-06-21 16:56:30,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:30,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086516297] [2024-06-21 16:56:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:30,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:31,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:31,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086516297] [2024-06-21 16:56:31,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086516297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:31,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:31,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:31,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715190836] [2024-06-21 16:56:31,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:31,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:31,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:31,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:31,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:31,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:31,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 89 transitions, 662 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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) [2024-06-21 16:56:31,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:31,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:31,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:31,995 INFO L124 PetriNetUnfolderBase]: 2127/3249 cut-off events. [2024-06-21 16:56:31,995 INFO L125 PetriNetUnfolderBase]: For 22943/22943 co-relation queries the response was YES. [2024-06-21 16:56:32,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14611 conditions, 3249 events. 2127/3249 cut-off events. For 22943/22943 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15552 event pairs, 700 based on Foata normal form. 6/3254 useless extension candidates. Maximal degree in co-relation 14577. Up to 3007 conditions per place. [2024-06-21 16:56:32,018 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 97 selfloop transitions, 23 changer transitions 0/124 dead transitions. [2024-06-21 16:56:32,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 124 transitions, 1144 flow [2024-06-21 16:56:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 16:56:32,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-21 16:56:32,020 INFO L175 Difference]: Start difference. First operand has 75 places, 89 transitions, 662 flow. Second operand 7 states and 136 transitions. [2024-06-21 16:56:32,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 124 transitions, 1144 flow [2024-06-21 16:56:32,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 1100 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-21 16:56:32,037 INFO L231 Difference]: Finished difference. Result has 82 places, 97 transitions, 770 flow [2024-06-21 16:56:32,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=770, PETRI_PLACES=82, PETRI_TRANSITIONS=97} [2024-06-21 16:56:32,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 16:56:32,038 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 97 transitions, 770 flow [2024-06-21 16:56:32,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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) [2024-06-21 16:56:32,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:32,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:32,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:56:32,039 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:32,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:32,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1762806237, now seen corresponding path program 3 times [2024-06-21 16:56:32,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:32,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013174477] [2024-06-21 16:56:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:32,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:32,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:32,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013174477] [2024-06-21 16:56:32,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013174477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:32,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:32,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:32,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429659958] [2024-06-21 16:56:32,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:32,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:32,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:32,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:32,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:32,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:32,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 97 transitions, 770 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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) [2024-06-21 16:56:32,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:32,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:32,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:33,181 INFO L124 PetriNetUnfolderBase]: 2131/3255 cut-off events. [2024-06-21 16:56:33,181 INFO L125 PetriNetUnfolderBase]: For 27428/27428 co-relation queries the response was YES. [2024-06-21 16:56:33,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15259 conditions, 3255 events. 2131/3255 cut-off events. For 27428/27428 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15608 event pairs, 694 based on Foata normal form. 6/3260 useless extension candidates. Maximal degree in co-relation 15221. Up to 3076 conditions per place. [2024-06-21 16:56:33,197 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 100 selfloop transitions, 21 changer transitions 0/125 dead transitions. [2024-06-21 16:56:33,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 125 transitions, 1172 flow [2024-06-21 16:56:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:33,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 16:56:33,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 16:56:33,198 INFO L175 Difference]: Start difference. First operand has 82 places, 97 transitions, 770 flow. Second operand 7 states and 132 transitions. [2024-06-21 16:56:33,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 125 transitions, 1172 flow [2024-06-21 16:56:33,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 1123 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 16:56:33,213 INFO L231 Difference]: Finished difference. Result has 87 places, 103 transitions, 848 flow [2024-06-21 16:56:33,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=848, PETRI_PLACES=87, PETRI_TRANSITIONS=103} [2024-06-21 16:56:33,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 16:56:33,214 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 103 transitions, 848 flow [2024-06-21 16:56:33,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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) [2024-06-21 16:56:33,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:33,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:33,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:56:33,214 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:33,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:33,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1672088309, now seen corresponding path program 1 times [2024-06-21 16:56:33,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:33,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950205725] [2024-06-21 16:56:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:33,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:34,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:34,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950205725] [2024-06-21 16:56:34,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950205725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:34,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:34,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:34,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987871668] [2024-06-21 16:56:34,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:34,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:34,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:34,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:34,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:34,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:34,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 103 transitions, 848 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:34,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:34,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:34,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:34,689 INFO L124 PetriNetUnfolderBase]: 2134/3259 cut-off events. [2024-06-21 16:56:34,690 INFO L125 PetriNetUnfolderBase]: For 30219/30219 co-relation queries the response was YES. [2024-06-21 16:56:34,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15629 conditions, 3259 events. 2134/3259 cut-off events. For 30219/30219 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15643 event pairs, 673 based on Foata normal form. 6/3264 useless extension candidates. Maximal degree in co-relation 15589. Up to 3061 conditions per place. [2024-06-21 16:56:34,734 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 25 changer transitions 0/128 dead transitions. [2024-06-21 16:56:34,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 128 transitions, 1230 flow [2024-06-21 16:56:34,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 16:56:34,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:56:34,749 INFO L175 Difference]: Start difference. First operand has 87 places, 103 transitions, 848 flow. Second operand 7 states and 133 transitions. [2024-06-21 16:56:34,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 128 transitions, 1230 flow [2024-06-21 16:56:34,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 128 transitions, 1177 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 16:56:34,800 INFO L231 Difference]: Finished difference. Result has 90 places, 106 transitions, 891 flow [2024-06-21 16:56:34,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=891, PETRI_PLACES=90, PETRI_TRANSITIONS=106} [2024-06-21 16:56:34,801 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-21 16:56:34,801 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 106 transitions, 891 flow [2024-06-21 16:56:34,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:34,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:34,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:34,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:56:34,802 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:34,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:34,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1948830532, now seen corresponding path program 1 times [2024-06-21 16:56:34,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:34,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106775563] [2024-06-21 16:56:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:34,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:35,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:35,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106775563] [2024-06-21 16:56:35,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106775563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:35,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:35,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:56:35,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545022925] [2024-06-21 16:56:35,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:35,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:56:35,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:35,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:56:35,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:56:35,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:35,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 106 transitions, 891 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:35,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:35,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:35,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:35,772 INFO L124 PetriNetUnfolderBase]: 2131/3255 cut-off events. [2024-06-21 16:56:35,772 INFO L125 PetriNetUnfolderBase]: For 32999/32999 co-relation queries the response was YES. [2024-06-21 16:56:35,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16074 conditions, 3255 events. 2131/3255 cut-off events. For 32999/32999 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15540 event pairs, 697 based on Foata normal form. 1/3255 useless extension candidates. Maximal degree in co-relation 16033. Up to 3137 conditions per place. [2024-06-21 16:56:35,791 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 102 selfloop transitions, 8 changer transitions 0/114 dead transitions. [2024-06-21 16:56:35,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 114 transitions, 1131 flow [2024-06-21 16:56:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:56:35,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:56:35,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-21 16:56:35,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 16:56:35,793 INFO L175 Difference]: Start difference. First operand has 90 places, 106 transitions, 891 flow. Second operand 5 states and 88 transitions. [2024-06-21 16:56:35,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 114 transitions, 1131 flow [2024-06-21 16:56:35,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 114 transitions, 1051 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 16:56:35,813 INFO L231 Difference]: Finished difference. Result has 90 places, 106 transitions, 833 flow [2024-06-21 16:56:35,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=833, PETRI_PLACES=90, PETRI_TRANSITIONS=106} [2024-06-21 16:56:35,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-21 16:56:35,814 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 106 transitions, 833 flow [2024-06-21 16:56:35,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:35,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:35,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:35,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:56:35,814 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:35,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:35,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1713197834, now seen corresponding path program 1 times [2024-06-21 16:56:35,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:35,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577460309] [2024-06-21 16:56:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:35,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:36,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:36,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577460309] [2024-06-21 16:56:36,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577460309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:36,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:36,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:36,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244284642] [2024-06-21 16:56:36,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:36,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:36,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:36,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:36,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:36,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:36,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 106 transitions, 833 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:36,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:36,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:36,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:37,315 INFO L124 PetriNetUnfolderBase]: 2142/3272 cut-off events. [2024-06-21 16:56:37,315 INFO L125 PetriNetUnfolderBase]: For 36332/36338 co-relation queries the response was YES. [2024-06-21 16:56:37,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16245 conditions, 3272 events. 2142/3272 cut-off events. For 36332/36338 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15683 event pairs, 680 based on Foata normal form. 8/3279 useless extension candidates. Maximal degree in co-relation 16203. Up to 3032 conditions per place. [2024-06-21 16:56:37,335 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 109 selfloop transitions, 26 changer transitions 0/139 dead transitions. [2024-06-21 16:56:37,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 139 transitions, 1305 flow [2024-06-21 16:56:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:37,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 16:56:37,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-21 16:56:37,337 INFO L175 Difference]: Start difference. First operand has 90 places, 106 transitions, 833 flow. Second operand 7 states and 136 transitions. [2024-06-21 16:56:37,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 139 transitions, 1305 flow [2024-06-21 16:56:37,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 139 transitions, 1281 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 16:56:37,358 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 955 flow [2024-06-21 16:56:37,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=955, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2024-06-21 16:56:37,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-21 16:56:37,359 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 955 flow [2024-06-21 16:56:37,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:37,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:37,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:37,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:56:37,360 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:37,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:37,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1502592074, now seen corresponding path program 2 times [2024-06-21 16:56:37,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:37,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770453488] [2024-06-21 16:56:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:37,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:38,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:38,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770453488] [2024-06-21 16:56:38,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770453488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:38,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:38,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:38,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997931806] [2024-06-21 16:56:38,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:38,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:38,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:38,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:38,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:38,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:38,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 955 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:38,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:38,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:38,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:38,683 INFO L124 PetriNetUnfolderBase]: 2137/3265 cut-off events. [2024-06-21 16:56:38,684 INFO L125 PetriNetUnfolderBase]: For 41235/41241 co-relation queries the response was YES. [2024-06-21 16:56:38,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16875 conditions, 3265 events. 2137/3265 cut-off events. For 41235/41241 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15654 event pairs, 680 based on Foata normal form. 8/3272 useless extension candidates. Maximal degree in co-relation 16833. Up to 3060 conditions per place. [2024-06-21 16:56:38,727 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 108 selfloop transitions, 22 changer transitions 0/134 dead transitions. [2024-06-21 16:56:38,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 134 transitions, 1271 flow [2024-06-21 16:56:38,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:38,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 16:56:38,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 16:56:38,730 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 955 flow. Second operand 7 states and 131 transitions. [2024-06-21 16:56:38,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 134 transitions, 1271 flow [2024-06-21 16:56:38,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1190 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 16:56:38,782 INFO L231 Difference]: Finished difference. Result has 97 places, 112 transitions, 926 flow [2024-06-21 16:56:38,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=926, PETRI_PLACES=97, PETRI_TRANSITIONS=112} [2024-06-21 16:56:38,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-21 16:56:38,783 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 112 transitions, 926 flow [2024-06-21 16:56:38,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:38,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:38,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:38,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:56:38,790 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:38,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:38,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1498867269, now seen corresponding path program 1 times [2024-06-21 16:56:38,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:38,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141740055] [2024-06-21 16:56:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:38,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:39,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:39,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141740055] [2024-06-21 16:56:39,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141740055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:39,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:39,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:39,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117249222] [2024-06-21 16:56:39,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:39,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:39,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:39,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:39,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:39,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 112 transitions, 926 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:39,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:39,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:39,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:40,000 INFO L124 PetriNetUnfolderBase]: 2221/3380 cut-off events. [2024-06-21 16:56:40,000 INFO L125 PetriNetUnfolderBase]: For 46826/46828 co-relation queries the response was YES. [2024-06-21 16:56:40,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17807 conditions, 3380 events. 2221/3380 cut-off events. For 46826/46828 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16205 event pairs, 639 based on Foata normal form. 8/3387 useless extension candidates. Maximal degree in co-relation 17763. Up to 2821 conditions per place. [2024-06-21 16:56:40,024 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 102 selfloop transitions, 47 changer transitions 0/153 dead transitions. [2024-06-21 16:56:40,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 153 transitions, 1600 flow [2024-06-21 16:56:40,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:40,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:40,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 16:56:40,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-21 16:56:40,029 INFO L175 Difference]: Start difference. First operand has 97 places, 112 transitions, 926 flow. Second operand 7 states and 145 transitions. [2024-06-21 16:56:40,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 153 transitions, 1600 flow [2024-06-21 16:56:40,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 153 transitions, 1545 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:56:40,066 INFO L231 Difference]: Finished difference. Result has 100 places, 121 transitions, 1133 flow [2024-06-21 16:56:40,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1133, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2024-06-21 16:56:40,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-21 16:56:40,066 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 1133 flow [2024-06-21 16:56:40,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:40,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:40,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:40,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:56:40,067 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:40,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:40,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1498872849, now seen corresponding path program 2 times [2024-06-21 16:56:40,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:40,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286148715] [2024-06-21 16:56:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:40,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:40,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:40,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286148715] [2024-06-21 16:56:40,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286148715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:40,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:40,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:40,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626065372] [2024-06-21 16:56:40,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:40,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:40,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:40,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:40,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:40,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:40,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 1133 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:40,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:40,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:40,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:41,260 INFO L124 PetriNetUnfolderBase]: 2209/3364 cut-off events. [2024-06-21 16:56:41,261 INFO L125 PetriNetUnfolderBase]: For 53119/53121 co-relation queries the response was YES. [2024-06-21 16:56:41,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18741 conditions, 3364 events. 2209/3364 cut-off events. For 53119/53121 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 16116 event pairs, 636 based on Foata normal form. 8/3371 useless extension candidates. Maximal degree in co-relation 18694. Up to 2815 conditions per place. [2024-06-21 16:56:41,283 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 103 selfloop transitions, 50 changer transitions 0/157 dead transitions. [2024-06-21 16:56:41,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 157 transitions, 1723 flow [2024-06-21 16:56:41,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:41,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:41,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-21 16:56:41,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-21 16:56:41,285 INFO L175 Difference]: Start difference. First operand has 100 places, 121 transitions, 1133 flow. Second operand 7 states and 148 transitions. [2024-06-21 16:56:41,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 157 transitions, 1723 flow [2024-06-21 16:56:41,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 157 transitions, 1628 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 16:56:41,333 INFO L231 Difference]: Finished difference. Result has 106 places, 124 transitions, 1241 flow [2024-06-21 16:56:41,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1241, PETRI_PLACES=106, PETRI_TRANSITIONS=124} [2024-06-21 16:56:41,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-21 16:56:41,334 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 124 transitions, 1241 flow [2024-06-21 16:56:41,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:41,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:41,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:41,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:56:41,335 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:41,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:41,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1188762136, now seen corresponding path program 1 times [2024-06-21 16:56:41,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:41,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762495849] [2024-06-21 16:56:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:41,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:42,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:42,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762495849] [2024-06-21 16:56:42,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762495849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:42,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:42,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:56:42,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954239098] [2024-06-21 16:56:42,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:42,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:56:42,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:56:42,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:56:42,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:42,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 124 transitions, 1241 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:42,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:42,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:42,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:42,830 INFO L124 PetriNetUnfolderBase]: 2211/3371 cut-off events. [2024-06-21 16:56:42,831 INFO L125 PetriNetUnfolderBase]: For 57677/57677 co-relation queries the response was YES. [2024-06-21 16:56:42,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19360 conditions, 3371 events. 2211/3371 cut-off events. For 57677/57677 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16185 event pairs, 669 based on Foata normal form. 3/3373 useless extension candidates. Maximal degree in co-relation 19310. Up to 3162 conditions per place. [2024-06-21 16:56:42,854 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 115 selfloop transitions, 30 changer transitions 0/149 dead transitions. [2024-06-21 16:56:42,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 149 transitions, 1677 flow [2024-06-21 16:56:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:42,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 16:56:42,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:56:42,856 INFO L175 Difference]: Start difference. First operand has 106 places, 124 transitions, 1241 flow. Second operand 7 states and 133 transitions. [2024-06-21 16:56:42,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 149 transitions, 1677 flow [2024-06-21 16:56:42,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 149 transitions, 1582 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 16:56:42,907 INFO L231 Difference]: Finished difference. Result has 108 places, 128 transitions, 1284 flow [2024-06-21 16:56:42,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1284, PETRI_PLACES=108, PETRI_TRANSITIONS=128} [2024-06-21 16:56:42,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-21 16:56:42,907 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 128 transitions, 1284 flow [2024-06-21 16:56:42,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:42,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:42,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:42,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:56:42,908 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:42,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:42,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1187580501, now seen corresponding path program 3 times [2024-06-21 16:56:42,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:42,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903728939] [2024-06-21 16:56:42,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:42,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:43,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:43,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903728939] [2024-06-21 16:56:43,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903728939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:43,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:43,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:43,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603205963] [2024-06-21 16:56:43,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:43,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:43,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:43,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:43,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:43,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:43,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 128 transitions, 1284 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:43,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:43,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:43,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:44,065 INFO L124 PetriNetUnfolderBase]: 2215/3379 cut-off events. [2024-06-21 16:56:44,065 INFO L125 PetriNetUnfolderBase]: For 61852/61858 co-relation queries the response was YES. [2024-06-21 16:56:44,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19625 conditions, 3379 events. 2215/3379 cut-off events. For 61852/61858 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16285 event pairs, 674 based on Foata normal form. 12/3390 useless extension candidates. Maximal degree in co-relation 19575. Up to 3167 conditions per place. [2024-06-21 16:56:44,089 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 127 selfloop transitions, 23 changer transitions 0/154 dead transitions. [2024-06-21 16:56:44,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 154 transitions, 1739 flow [2024-06-21 16:56:44,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 16:56:44,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:56:44,093 INFO L175 Difference]: Start difference. First operand has 108 places, 128 transitions, 1284 flow. Second operand 7 states and 133 transitions. [2024-06-21 16:56:44,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 154 transitions, 1739 flow [2024-06-21 16:56:44,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 154 transitions, 1653 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 16:56:44,142 INFO L231 Difference]: Finished difference. Result has 110 places, 132 transitions, 1320 flow [2024-06-21 16:56:44,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1320, PETRI_PLACES=110, PETRI_TRANSITIONS=132} [2024-06-21 16:56:44,143 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-21 16:56:44,143 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 132 transitions, 1320 flow [2024-06-21 16:56:44,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:44,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:44,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:44,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:56:44,144 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:44,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:44,144 INFO L85 PathProgramCache]: Analyzing trace with hash 284206230, now seen corresponding path program 1 times [2024-06-21 16:56:44,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:44,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349750349] [2024-06-21 16:56:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:44,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:44,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:44,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349750349] [2024-06-21 16:56:44,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349750349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:44,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:44,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:56:44,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647198215] [2024-06-21 16:56:44,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:44,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:56:44,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:44,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:56:44,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:56:44,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:56:44,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 132 transitions, 1320 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:44,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:44,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:56:44,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:45,308 INFO L124 PetriNetUnfolderBase]: 2464/3630 cut-off events. [2024-06-21 16:56:45,308 INFO L125 PetriNetUnfolderBase]: For 75398/75398 co-relation queries the response was YES. [2024-06-21 16:56:45,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21801 conditions, 3630 events. 2464/3630 cut-off events. For 75398/75398 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16666 event pairs, 778 based on Foata normal form. 1/3630 useless extension candidates. Maximal degree in co-relation 21750. Up to 3612 conditions per place. [2024-06-21 16:56:45,335 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 130 selfloop transitions, 11 changer transitions 0/144 dead transitions. [2024-06-21 16:56:45,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 144 transitions, 1650 flow [2024-06-21 16:56:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:56:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:56:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 16:56:45,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 16:56:45,336 INFO L175 Difference]: Start difference. First operand has 110 places, 132 transitions, 1320 flow. Second operand 6 states and 96 transitions. [2024-06-21 16:56:45,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 144 transitions, 1650 flow [2024-06-21 16:56:45,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 144 transitions, 1579 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 16:56:45,382 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1309 flow [2024-06-21 16:56:45,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1309, PETRI_PLACES=111, PETRI_TRANSITIONS=135} [2024-06-21 16:56:45,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-21 16:56:45,382 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1309 flow [2024-06-21 16:56:45,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:45,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:45,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:45,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:56:45,383 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:45,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:45,383 INFO L85 PathProgramCache]: Analyzing trace with hash 661430064, now seen corresponding path program 1 times [2024-06-21 16:56:45,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:45,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357129082] [2024-06-21 16:56:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:45,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:46,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:46,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357129082] [2024-06-21 16:56:46,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357129082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:46,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:46,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:56:46,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937123019] [2024-06-21 16:56:46,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:46,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:56:46,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:46,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:56:46,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:56:46,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:46,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 135 transitions, 1309 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:46,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:46,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:46,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:46,958 INFO L124 PetriNetUnfolderBase]: 2301/3478 cut-off events. [2024-06-21 16:56:46,958 INFO L125 PetriNetUnfolderBase]: For 82010/82016 co-relation queries the response was YES. [2024-06-21 16:56:46,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21601 conditions, 3478 events. 2301/3478 cut-off events. For 82010/82016 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16734 event pairs, 533 based on Foata normal form. 10/3487 useless extension candidates. Maximal degree in co-relation 21549. Up to 3136 conditions per place. [2024-06-21 16:56:46,981 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 135 selfloop transitions, 32 changer transitions 0/172 dead transitions. [2024-06-21 16:56:46,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 172 transitions, 1901 flow [2024-06-21 16:56:46,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:56:46,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:56:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:56:46,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 16:56:46,983 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1309 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:56:46,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 172 transitions, 1901 flow [2024-06-21 16:56:47,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 172 transitions, 1863 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:56:47,030 INFO L231 Difference]: Finished difference. Result has 115 places, 139 transitions, 1442 flow [2024-06-21 16:56:47,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1442, PETRI_PLACES=115, PETRI_TRANSITIONS=139} [2024-06-21 16:56:47,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-21 16:56:47,031 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 139 transitions, 1442 flow [2024-06-21 16:56:47,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:47,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:47,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:47,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:56:47,032 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:47,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:47,033 INFO L85 PathProgramCache]: Analyzing trace with hash 661490514, now seen corresponding path program 2 times [2024-06-21 16:56:47,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:47,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897065759] [2024-06-21 16:56:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:47,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:47,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:47,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897065759] [2024-06-21 16:56:47,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897065759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:47,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:47,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:56:47,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884904900] [2024-06-21 16:56:47,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:47,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:56:47,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:47,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:56:47,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:56:47,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:47,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 139 transitions, 1442 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:47,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:47,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:47,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:48,572 INFO L124 PetriNetUnfolderBase]: 2318/3505 cut-off events. [2024-06-21 16:56:48,573 INFO L125 PetriNetUnfolderBase]: For 90451/90457 co-relation queries the response was YES. [2024-06-21 16:56:48,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22399 conditions, 3505 events. 2318/3505 cut-off events. For 90451/90457 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16848 event pairs, 674 based on Foata normal form. 10/3514 useless extension candidates. Maximal degree in co-relation 22346. Up to 3245 conditions per place. [2024-06-21 16:56:48,595 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 138 selfloop transitions, 28 changer transitions 0/171 dead transitions. [2024-06-21 16:56:48,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 171 transitions, 1902 flow [2024-06-21 16:56:48,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:56:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:56:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:56:48,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 16:56:48,597 INFO L175 Difference]: Start difference. First operand has 115 places, 139 transitions, 1442 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:56:48,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 171 transitions, 1902 flow [2024-06-21 16:56:48,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 171 transitions, 1796 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 16:56:48,658 INFO L231 Difference]: Finished difference. Result has 119 places, 141 transitions, 1455 flow [2024-06-21 16:56:48,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1455, PETRI_PLACES=119, PETRI_TRANSITIONS=141} [2024-06-21 16:56:48,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-21 16:56:48,659 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 141 transitions, 1455 flow [2024-06-21 16:56:48,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:48,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:48,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:48,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:56:48,660 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:48,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:48,660 INFO L85 PathProgramCache]: Analyzing trace with hash 661490638, now seen corresponding path program 1 times [2024-06-21 16:56:48,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:48,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141205824] [2024-06-21 16:56:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:48,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:49,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:49,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141205824] [2024-06-21 16:56:49,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141205824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:49,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:49,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:56:49,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733363391] [2024-06-21 16:56:49,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:49,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:56:49,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:49,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:56:49,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:56:49,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:49,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 141 transitions, 1455 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:49,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:49,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:49,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:50,303 INFO L124 PetriNetUnfolderBase]: 2421/3640 cut-off events. [2024-06-21 16:56:50,303 INFO L125 PetriNetUnfolderBase]: For 98775/98779 co-relation queries the response was YES. [2024-06-21 16:56:50,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23388 conditions, 3640 events. 2421/3640 cut-off events. For 98775/98779 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 17603 event pairs, 582 based on Foata normal form. 8/3643 useless extension candidates. Maximal degree in co-relation 23333. Up to 2862 conditions per place. [2024-06-21 16:56:50,332 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 132 selfloop transitions, 67 changer transitions 0/204 dead transitions. [2024-06-21 16:56:50,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 204 transitions, 2449 flow [2024-06-21 16:56:50,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:56:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:56:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 16:56:50,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-21 16:56:50,334 INFO L175 Difference]: Start difference. First operand has 119 places, 141 transitions, 1455 flow. Second operand 10 states and 208 transitions. [2024-06-21 16:56:50,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 204 transitions, 2449 flow [2024-06-21 16:56:50,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 204 transitions, 2368 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 16:56:50,414 INFO L231 Difference]: Finished difference. Result has 125 places, 153 transitions, 1698 flow [2024-06-21 16:56:50,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1698, PETRI_PLACES=125, PETRI_TRANSITIONS=153} [2024-06-21 16:56:50,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-21 16:56:50,415 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 153 transitions, 1698 flow [2024-06-21 16:56:50,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:50,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:50,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:50,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:56:50,416 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:50,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:50,416 INFO L85 PathProgramCache]: Analyzing trace with hash 664287024, now seen corresponding path program 3 times [2024-06-21 16:56:50,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:50,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972320432] [2024-06-21 16:56:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:50,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:51,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:51,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972320432] [2024-06-21 16:56:51,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972320432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:51,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:51,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:56:51,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408008218] [2024-06-21 16:56:51,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:51,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:56:51,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:56:51,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:56:51,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:51,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 153 transitions, 1698 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:51,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:51,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:51,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:52,211 INFO L124 PetriNetUnfolderBase]: 2397/3611 cut-off events. [2024-06-21 16:56:52,211 INFO L125 PetriNetUnfolderBase]: For 108401/108409 co-relation queries the response was YES. [2024-06-21 16:56:52,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24494 conditions, 3611 events. 2397/3611 cut-off events. For 108401/108409 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 17432 event pairs, 671 based on Foata normal form. 10/3615 useless extension candidates. Maximal degree in co-relation 24436. Up to 3390 conditions per place. [2024-06-21 16:56:52,242 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 151 selfloop transitions, 24 changer transitions 0/180 dead transitions. [2024-06-21 16:56:52,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 180 transitions, 2116 flow [2024-06-21 16:56:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:56:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:56:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:56:52,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:56:52,244 INFO L175 Difference]: Start difference. First operand has 125 places, 153 transitions, 1698 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:56:52,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 180 transitions, 2116 flow [2024-06-21 16:56:52,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 180 transitions, 1949 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 16:56:52,332 INFO L231 Difference]: Finished difference. Result has 128 places, 153 transitions, 1586 flow [2024-06-21 16:56:52,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1586, PETRI_PLACES=128, PETRI_TRANSITIONS=153} [2024-06-21 16:56:52,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-21 16:56:52,333 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 153 transitions, 1586 flow [2024-06-21 16:56:52,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:52,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:52,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:52,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:56:52,334 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:52,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash 779578318, now seen corresponding path program 2 times [2024-06-21 16:56:52,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:52,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526938363] [2024-06-21 16:56:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:52,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:53,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:53,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526938363] [2024-06-21 16:56:53,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526938363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:53,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:53,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:56:53,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533647620] [2024-06-21 16:56:53,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:53,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:56:53,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:53,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:56:53,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:56:53,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:53,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 153 transitions, 1586 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:53,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:53,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:53,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:53,973 INFO L124 PetriNetUnfolderBase]: 2432/3667 cut-off events. [2024-06-21 16:56:53,973 INFO L125 PetriNetUnfolderBase]: For 115343/115345 co-relation queries the response was YES. [2024-06-21 16:56:53,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24840 conditions, 3667 events. 2432/3667 cut-off events. For 115343/115345 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17836 event pairs, 554 based on Foata normal form. 6/3672 useless extension candidates. Maximal degree in co-relation 24780. Up to 2874 conditions per place. [2024-06-21 16:56:54,000 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 128 selfloop transitions, 78 changer transitions 0/211 dead transitions. [2024-06-21 16:56:54,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 211 transitions, 2647 flow [2024-06-21 16:56:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:56:54,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:56:54,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-21 16:56:54,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-21 16:56:54,002 INFO L175 Difference]: Start difference. First operand has 128 places, 153 transitions, 1586 flow. Second operand 8 states and 174 transitions. [2024-06-21 16:56:54,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 211 transitions, 2647 flow [2024-06-21 16:56:54,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 211 transitions, 2584 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 16:56:54,077 INFO L231 Difference]: Finished difference. Result has 132 places, 167 transitions, 1963 flow [2024-06-21 16:56:54,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1963, PETRI_PLACES=132, PETRI_TRANSITIONS=167} [2024-06-21 16:56:54,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-21 16:56:54,078 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 167 transitions, 1963 flow [2024-06-21 16:56:54,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:54,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:54,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:54,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:56:54,079 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:54,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:54,079 INFO L85 PathProgramCache]: Analyzing trace with hash 779582968, now seen corresponding path program 3 times [2024-06-21 16:56:54,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:54,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698157323] [2024-06-21 16:56:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:54,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:54,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:54,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698157323] [2024-06-21 16:56:54,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698157323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:54,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:54,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:56:54,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420225005] [2024-06-21 16:56:54,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:54,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:56:54,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:54,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:56:54,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:56:54,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:54,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 167 transitions, 1963 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:54,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:54,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:54,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:55,558 INFO L124 PetriNetUnfolderBase]: 2467/3718 cut-off events. [2024-06-21 16:56:55,558 INFO L125 PetriNetUnfolderBase]: For 129290/129292 co-relation queries the response was YES. [2024-06-21 16:56:55,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27127 conditions, 3718 events. 2467/3718 cut-off events. For 129290/129292 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18103 event pairs, 556 based on Foata normal form. 6/3723 useless extension candidates. Maximal degree in co-relation 27063. Up to 3066 conditions per place. [2024-06-21 16:56:55,600 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 134 selfloop transitions, 70 changer transitions 0/209 dead transitions. [2024-06-21 16:56:55,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 209 transitions, 2783 flow [2024-06-21 16:56:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:56:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:56:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 16:56:55,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-21 16:56:55,602 INFO L175 Difference]: Start difference. First operand has 132 places, 167 transitions, 1963 flow. Second operand 8 states and 167 transitions. [2024-06-21 16:56:55,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 209 transitions, 2783 flow [2024-06-21 16:56:55,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 209 transitions, 2696 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-21 16:56:55,718 INFO L231 Difference]: Finished difference. Result has 138 places, 171 transitions, 2105 flow [2024-06-21 16:56:55,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2105, PETRI_PLACES=138, PETRI_TRANSITIONS=171} [2024-06-21 16:56:55,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-21 16:56:55,719 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 171 transitions, 2105 flow [2024-06-21 16:56:55,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:55,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:55,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:55,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:56:55,719 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:55,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:55,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1687791798, now seen corresponding path program 4 times [2024-06-21 16:56:55,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:55,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319713958] [2024-06-21 16:56:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:55,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:56,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:56,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319713958] [2024-06-21 16:56:56,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319713958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:56,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:56,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:56:56,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84566550] [2024-06-21 16:56:56,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:56,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:56:56,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:56,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:56:56,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:56:56,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:56,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 171 transitions, 2105 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:56,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:56,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:56,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:57,313 INFO L124 PetriNetUnfolderBase]: 2502/3769 cut-off events. [2024-06-21 16:56:57,313 INFO L125 PetriNetUnfolderBase]: For 139464/139466 co-relation queries the response was YES. [2024-06-21 16:56:57,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28180 conditions, 3769 events. 2502/3769 cut-off events. For 139464/139466 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 18342 event pairs, 555 based on Foata normal form. 8/3776 useless extension candidates. Maximal degree in co-relation 28114. Up to 3179 conditions per place. [2024-06-21 16:56:57,342 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 147 selfloop transitions, 55 changer transitions 0/207 dead transitions. [2024-06-21 16:56:57,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 207 transitions, 2783 flow [2024-06-21 16:56:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:56:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:56:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:56:57,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 16:56:57,343 INFO L175 Difference]: Start difference. First operand has 138 places, 171 transitions, 2105 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:56:57,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 207 transitions, 2783 flow [2024-06-21 16:56:57,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 207 transitions, 2602 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 16:56:57,443 INFO L231 Difference]: Finished difference. Result has 140 places, 175 transitions, 2131 flow [2024-06-21 16:56:57,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2131, PETRI_PLACES=140, PETRI_TRANSITIONS=175} [2024-06-21 16:56:57,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-21 16:56:57,444 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 175 transitions, 2131 flow [2024-06-21 16:56:57,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:57,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:57,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:57,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:56:57,445 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:57,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:57,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1687798742, now seen corresponding path program 1 times [2024-06-21 16:56:57,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:57,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737166111] [2024-06-21 16:56:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:57,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:58,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:58,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737166111] [2024-06-21 16:56:58,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737166111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:58,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:58,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:56:58,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283407818] [2024-06-21 16:56:58,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:58,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:56:58,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:58,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:56:58,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:56:58,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:58,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 175 transitions, 2131 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:58,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:58,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:58,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:59,188 INFO L124 PetriNetUnfolderBase]: 2570/3869 cut-off events. [2024-06-21 16:56:59,188 INFO L125 PetriNetUnfolderBase]: For 151960/151962 co-relation queries the response was YES. [2024-06-21 16:56:59,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29063 conditions, 3869 events. 2570/3869 cut-off events. For 151960/151962 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18951 event pairs, 580 based on Foata normal form. 14/3882 useless extension candidates. Maximal degree in co-relation 28996. Up to 3261 conditions per place. [2024-06-21 16:56:59,213 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 154 selfloop transitions, 53 changer transitions 0/212 dead transitions. [2024-06-21 16:56:59,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 212 transitions, 2877 flow [2024-06-21 16:56:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:56:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:56:59,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 16:56:59,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-21 16:56:59,214 INFO L175 Difference]: Start difference. First operand has 140 places, 175 transitions, 2131 flow. Second operand 8 states and 163 transitions. [2024-06-21 16:56:59,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 212 transitions, 2877 flow [2024-06-21 16:56:59,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 212 transitions, 2718 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 16:56:59,317 INFO L231 Difference]: Finished difference. Result has 142 places, 179 transitions, 2173 flow [2024-06-21 16:56:59,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1972, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2173, PETRI_PLACES=142, PETRI_TRANSITIONS=179} [2024-06-21 16:56:59,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-21 16:56:59,318 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 179 transitions, 2173 flow [2024-06-21 16:56:59,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:59,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:59,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:59,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:56:59,319 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:59,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:59,319 INFO L85 PathProgramCache]: Analyzing trace with hash -878650687, now seen corresponding path program 1 times [2024-06-21 16:56:59,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:59,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211009271] [2024-06-21 16:56:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:59,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:59,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:59,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211009271] [2024-06-21 16:56:59,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211009271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:59,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:59,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:56:59,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551941224] [2024-06-21 16:56:59,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:59,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:56:59,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:59,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:56:59,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:56:59,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:56:59,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 179 transitions, 2173 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:59,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:59,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:56:59,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:00,473 INFO L124 PetriNetUnfolderBase]: 2567/3866 cut-off events. [2024-06-21 16:57:00,473 INFO L125 PetriNetUnfolderBase]: For 155700/155700 co-relation queries the response was YES. [2024-06-21 16:57:00,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29623 conditions, 3866 events. 2567/3866 cut-off events. For 155700/155700 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18943 event pairs, 672 based on Foata normal form. 1/3866 useless extension candidates. Maximal degree in co-relation 29555. Up to 3722 conditions per place. [2024-06-21 16:57:00,608 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 177 selfloop transitions, 16 changer transitions 0/198 dead transitions. [2024-06-21 16:57:00,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 198 transitions, 2714 flow [2024-06-21 16:57:00,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:57:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:57:00,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 16:57:00,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 16:57:00,610 INFO L175 Difference]: Start difference. First operand has 142 places, 179 transitions, 2173 flow. Second operand 6 states and 110 transitions. [2024-06-21 16:57:00,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 198 transitions, 2714 flow [2024-06-21 16:57:00,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 198 transitions, 2539 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 16:57:00,711 INFO L231 Difference]: Finished difference. Result has 142 places, 182 transitions, 2093 flow [2024-06-21 16:57:00,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2093, PETRI_PLACES=142, PETRI_TRANSITIONS=182} [2024-06-21 16:57:00,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-21 16:57:00,712 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 182 transitions, 2093 flow [2024-06-21 16:57:00,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:00,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:00,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:00,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:57:00,713 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:00,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:00,713 INFO L85 PathProgramCache]: Analyzing trace with hash -567637078, now seen corresponding path program 2 times [2024-06-21 16:57:00,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:00,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560625196] [2024-06-21 16:57:00,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:00,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:01,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:01,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560625196] [2024-06-21 16:57:01,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560625196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:01,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:01,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:57:01,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580244170] [2024-06-21 16:57:01,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:01,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:57:01,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:01,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:57:01,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:57:01,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:01,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 182 transitions, 2093 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:01,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:01,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:01,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:02,316 INFO L124 PetriNetUnfolderBase]: 2595/3910 cut-off events. [2024-06-21 16:57:02,317 INFO L125 PetriNetUnfolderBase]: For 165464/165464 co-relation queries the response was YES. [2024-06-21 16:57:02,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29497 conditions, 3910 events. 2595/3910 cut-off events. For 165464/165464 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 19182 event pairs, 662 based on Foata normal form. 6/3915 useless extension candidates. Maximal degree in co-relation 29428. Up to 3704 conditions per place. [2024-06-21 16:57:02,345 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 182 selfloop transitions, 24 changer transitions 0/211 dead transitions. [2024-06-21 16:57:02,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 211 transitions, 2707 flow [2024-06-21 16:57:02,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:57:02,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:57:02,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 16:57:02,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 16:57:02,346 INFO L175 Difference]: Start difference. First operand has 142 places, 182 transitions, 2093 flow. Second operand 8 states and 148 transitions. [2024-06-21 16:57:02,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 211 transitions, 2707 flow [2024-06-21 16:57:02,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 211 transitions, 2564 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:57:02,455 INFO L231 Difference]: Finished difference. Result has 144 places, 185 transitions, 2088 flow [2024-06-21 16:57:02,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1950, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2088, PETRI_PLACES=144, PETRI_TRANSITIONS=185} [2024-06-21 16:57:02,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 16:57:02,456 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 185 transitions, 2088 flow [2024-06-21 16:57:02,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:02,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:02,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:02,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:57:02,457 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:02,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:02,457 INFO L85 PathProgramCache]: Analyzing trace with hash -795538228, now seen corresponding path program 3 times [2024-06-21 16:57:02,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:02,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517264423] [2024-06-21 16:57:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:02,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:03,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:03,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517264423] [2024-06-21 16:57:03,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517264423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:03,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:03,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:57:03,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015115650] [2024-06-21 16:57:03,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:03,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:57:03,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:03,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:57:03,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:57:03,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:03,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 185 transitions, 2088 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:03,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:03,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:03,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:04,079 INFO L124 PetriNetUnfolderBase]: 2623/3954 cut-off events. [2024-06-21 16:57:04,079 INFO L125 PetriNetUnfolderBase]: For 175346/175346 co-relation queries the response was YES. [2024-06-21 16:57:04,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30245 conditions, 3954 events. 2623/3954 cut-off events. For 175346/175346 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19427 event pairs, 664 based on Foata normal form. 6/3959 useless extension candidates. Maximal degree in co-relation 30176. Up to 3688 conditions per place. [2024-06-21 16:57:04,111 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 181 selfloop transitions, 30 changer transitions 0/216 dead transitions. [2024-06-21 16:57:04,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 216 transitions, 2788 flow [2024-06-21 16:57:04,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:57:04,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:57:04,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:57:04,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 16:57:04,113 INFO L175 Difference]: Start difference. First operand has 144 places, 185 transitions, 2088 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:57:04,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 216 transitions, 2788 flow [2024-06-21 16:57:04,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 216 transitions, 2674 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 16:57:04,257 INFO L231 Difference]: Finished difference. Result has 146 places, 188 transitions, 2130 flow [2024-06-21 16:57:04,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1974, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2130, PETRI_PLACES=146, PETRI_TRANSITIONS=188} [2024-06-21 16:57:04,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-21 16:57:04,257 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 188 transitions, 2130 flow [2024-06-21 16:57:04,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:04,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:04,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:04,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:57:04,258 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:04,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:04,258 INFO L85 PathProgramCache]: Analyzing trace with hash -567644022, now seen corresponding path program 5 times [2024-06-21 16:57:04,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:04,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499333048] [2024-06-21 16:57:04,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:04,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:04,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:04,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499333048] [2024-06-21 16:57:04,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499333048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:04,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:04,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:57:04,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418423994] [2024-06-21 16:57:04,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:04,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:57:04,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:04,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:57:04,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:57:05,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:05,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 188 transitions, 2130 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:05,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:05,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:05,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:05,741 INFO L124 PetriNetUnfolderBase]: 2641/3981 cut-off events. [2024-06-21 16:57:05,741 INFO L125 PetriNetUnfolderBase]: For 184444/184450 co-relation queries the response was YES. [2024-06-21 16:57:05,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30639 conditions, 3981 events. 2641/3981 cut-off events. For 184444/184450 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19589 event pairs, 659 based on Foata normal form. 15/3995 useless extension candidates. Maximal degree in co-relation 30569. Up to 3668 conditions per place. [2024-06-21 16:57:05,774 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 180 selfloop transitions, 43 changer transitions 0/228 dead transitions. [2024-06-21 16:57:05,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 228 transitions, 3045 flow [2024-06-21 16:57:05,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:57:05,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:57:05,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:57:05,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 16:57:05,779 INFO L175 Difference]: Start difference. First operand has 146 places, 188 transitions, 2130 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:57:05,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 228 transitions, 3045 flow [2024-06-21 16:57:05,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 228 transitions, 2913 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 16:57:05,907 INFO L231 Difference]: Finished difference. Result has 149 places, 199 transitions, 2334 flow [2024-06-21 16:57:05,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2334, PETRI_PLACES=149, PETRI_TRANSITIONS=199} [2024-06-21 16:57:05,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-21 16:57:05,908 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 199 transitions, 2334 flow [2024-06-21 16:57:05,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:05,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:05,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:05,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:57:05,909 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:05,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:05,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1803089066, now seen corresponding path program 4 times [2024-06-21 16:57:05,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:05,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316367924] [2024-06-21 16:57:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:05,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:06,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:06,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316367924] [2024-06-21 16:57:06,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316367924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:06,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:06,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:06,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716364713] [2024-06-21 16:57:06,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:06,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:06,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:06,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:06,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:06,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:06,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 199 transitions, 2334 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:06,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:06,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:06,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:07,794 INFO L124 PetriNetUnfolderBase]: 2669/4024 cut-off events. [2024-06-21 16:57:07,794 INFO L125 PetriNetUnfolderBase]: For 193247/193247 co-relation queries the response was YES. [2024-06-21 16:57:07,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31343 conditions, 4024 events. 2669/4024 cut-off events. For 193247/193247 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19852 event pairs, 647 based on Foata normal form. 6/4029 useless extension candidates. Maximal degree in co-relation 31271. Up to 3790 conditions per place. [2024-06-21 16:57:07,828 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 195 selfloop transitions, 28 changer transitions 0/228 dead transitions. [2024-06-21 16:57:07,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 228 transitions, 3000 flow [2024-06-21 16:57:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:57:07,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:57:07,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:57:07,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 16:57:07,830 INFO L175 Difference]: Start difference. First operand has 149 places, 199 transitions, 2334 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:57:07,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 228 transitions, 3000 flow [2024-06-21 16:57:07,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 228 transitions, 2877 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 16:57:07,974 INFO L231 Difference]: Finished difference. Result has 153 places, 202 transitions, 2371 flow [2024-06-21 16:57:07,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2211, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2371, PETRI_PLACES=153, PETRI_TRANSITIONS=202} [2024-06-21 16:57:07,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-21 16:57:07,975 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 202 transitions, 2371 flow [2024-06-21 16:57:07,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:07,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:07,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:07,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:57:07,976 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:07,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:07,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1847992318, now seen corresponding path program 5 times [2024-06-21 16:57:07,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:07,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585405802] [2024-06-21 16:57:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:07,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:08,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:08,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585405802] [2024-06-21 16:57:08,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585405802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:08,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:08,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:08,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127162791] [2024-06-21 16:57:08,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:08,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:08,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:08,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:08,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:08,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:08,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 202 transitions, 2371 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:08,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:08,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:08,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:09,656 INFO L124 PetriNetUnfolderBase]: 2672/4029 cut-off events. [2024-06-21 16:57:09,656 INFO L125 PetriNetUnfolderBase]: For 201370/201370 co-relation queries the response was YES. [2024-06-21 16:57:09,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31567 conditions, 4029 events. 2672/4029 cut-off events. For 201370/201370 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19909 event pairs, 663 based on Foata normal form. 6/4034 useless extension candidates. Maximal degree in co-relation 31493. Up to 3764 conditions per place. [2024-06-21 16:57:09,694 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 190 selfloop transitions, 36 changer transitions 0/231 dead transitions. [2024-06-21 16:57:09,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 231 transitions, 3053 flow [2024-06-21 16:57:09,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:57:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:57:09,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:57:09,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 16:57:09,695 INFO L175 Difference]: Start difference. First operand has 153 places, 202 transitions, 2371 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:57:09,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 231 transitions, 3053 flow [2024-06-21 16:57:09,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 231 transitions, 2915 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 16:57:09,838 INFO L231 Difference]: Finished difference. Result has 155 places, 205 transitions, 2419 flow [2024-06-21 16:57:09,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2419, PETRI_PLACES=155, PETRI_TRANSITIONS=205} [2024-06-21 16:57:09,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-21 16:57:09,839 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 205 transitions, 2419 flow [2024-06-21 16:57:09,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:09,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:09,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:09,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:57:09,839 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:09,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:09,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1847992070, now seen corresponding path program 1 times [2024-06-21 16:57:09,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:09,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651883868] [2024-06-21 16:57:09,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:09,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:10,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:10,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651883868] [2024-06-21 16:57:10,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651883868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:10,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:10,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:57:10,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144673060] [2024-06-21 16:57:10,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:10,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:57:10,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:10,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:57:10,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:57:10,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:10,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 205 transitions, 2419 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:10,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:10,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:10,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:11,282 INFO L124 PetriNetUnfolderBase]: 2663/4017 cut-off events. [2024-06-21 16:57:11,282 INFO L125 PetriNetUnfolderBase]: For 207053/207057 co-relation queries the response was YES. [2024-06-21 16:57:11,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31682 conditions, 4017 events. 2663/4017 cut-off events. For 207053/207057 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19864 event pairs, 658 based on Foata normal form. 7/4023 useless extension candidates. Maximal degree in co-relation 31607. Up to 3756 conditions per place. [2024-06-21 16:57:11,315 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 36 changer transitions 0/227 dead transitions. [2024-06-21 16:57:11,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 227 transitions, 2991 flow [2024-06-21 16:57:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:57:11,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:57:11,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 16:57:11,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-21 16:57:11,316 INFO L175 Difference]: Start difference. First operand has 155 places, 205 transitions, 2419 flow. Second operand 7 states and 135 transitions. [2024-06-21 16:57:11,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 227 transitions, 2991 flow [2024-06-21 16:57:11,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 227 transitions, 2801 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-21 16:57:11,486 INFO L231 Difference]: Finished difference. Result has 156 places, 205 transitions, 2315 flow [2024-06-21 16:57:11,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2315, PETRI_PLACES=156, PETRI_TRANSITIONS=205} [2024-06-21 16:57:11,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-21 16:57:11,486 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 205 transitions, 2315 flow [2024-06-21 16:57:11,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:11,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:11,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:11,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:57:11,487 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:11,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:11,487 INFO L85 PathProgramCache]: Analyzing trace with hash 220446563, now seen corresponding path program 2 times [2024-06-21 16:57:11,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:11,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176880426] [2024-06-21 16:57:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:11,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:11,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:11,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176880426] [2024-06-21 16:57:11,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176880426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:11,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:11,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:57:11,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063437965] [2024-06-21 16:57:11,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:11,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:57:11,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:11,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:57:11,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:57:12,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:12,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 205 transitions, 2315 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:12,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:12,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:12,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:12,587 INFO L124 PetriNetUnfolderBase]: 2659/4011 cut-off events. [2024-06-21 16:57:12,588 INFO L125 PetriNetUnfolderBase]: For 212648/212648 co-relation queries the response was YES. [2024-06-21 16:57:12,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31619 conditions, 4011 events. 2659/4011 cut-off events. For 212648/212648 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19774 event pairs, 671 based on Foata normal form. 1/4011 useless extension candidates. Maximal degree in co-relation 31543. Up to 3886 conditions per place. [2024-06-21 16:57:12,623 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 198 selfloop transitions, 11 changer transitions 0/214 dead transitions. [2024-06-21 16:57:12,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 214 transitions, 2755 flow [2024-06-21 16:57:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:57:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:57:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 16:57:12,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 16:57:12,624 INFO L175 Difference]: Start difference. First operand has 156 places, 205 transitions, 2315 flow. Second operand 6 states and 101 transitions. [2024-06-21 16:57:12,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 214 transitions, 2755 flow [2024-06-21 16:57:12,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 214 transitions, 2663 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:57:12,796 INFO L231 Difference]: Finished difference. Result has 156 places, 205 transitions, 2251 flow [2024-06-21 16:57:12,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2223, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2251, PETRI_PLACES=156, PETRI_TRANSITIONS=205} [2024-06-21 16:57:12,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-21 16:57:12,797 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 205 transitions, 2251 flow [2024-06-21 16:57:12,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:12,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:12,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:12,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:57:12,798 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:12,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:12,798 INFO L85 PathProgramCache]: Analyzing trace with hash -872930815, now seen corresponding path program 1 times [2024-06-21 16:57:12,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:12,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432744277] [2024-06-21 16:57:12,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:12,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:13,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:13,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432744277] [2024-06-21 16:57:13,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432744277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:13,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:13,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:57:13,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40347097] [2024-06-21 16:57:13,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:13,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:57:13,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:13,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:57:13,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:57:13,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:13,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 205 transitions, 2251 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:13,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:13,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:13,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:13,989 INFO L124 PetriNetUnfolderBase]: 2659/4011 cut-off events. [2024-06-21 16:57:13,989 INFO L125 PetriNetUnfolderBase]: For 210930/210930 co-relation queries the response was YES. [2024-06-21 16:57:14,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31190 conditions, 4011 events. 2659/4011 cut-off events. For 210930/210930 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19760 event pairs, 669 based on Foata normal form. 3/4013 useless extension candidates. Maximal degree in co-relation 31113. Up to 3837 conditions per place. [2024-06-21 16:57:14,024 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 192 selfloop transitions, 24 changer transitions 0/221 dead transitions. [2024-06-21 16:57:14,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 221 transitions, 2833 flow [2024-06-21 16:57:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:57:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:57:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 16:57:14,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 16:57:14,026 INFO L175 Difference]: Start difference. First operand has 156 places, 205 transitions, 2251 flow. Second operand 6 states and 111 transitions. [2024-06-21 16:57:14,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 221 transitions, 2833 flow [2024-06-21 16:57:14,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 221 transitions, 2801 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 16:57:14,233 INFO L231 Difference]: Finished difference. Result has 157 places, 208 transitions, 2326 flow [2024-06-21 16:57:14,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2326, PETRI_PLACES=157, PETRI_TRANSITIONS=208} [2024-06-21 16:57:14,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 16:57:14,233 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 208 transitions, 2326 flow [2024-06-21 16:57:14,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:14,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:14,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:14,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:57:14,234 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:14,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:14,234 INFO L85 PathProgramCache]: Analyzing trace with hash 220452515, now seen corresponding path program 2 times [2024-06-21 16:57:14,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:14,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943104549] [2024-06-21 16:57:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:14,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:14,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:14,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943104549] [2024-06-21 16:57:14,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943104549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:14,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:14,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:57:14,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978122437] [2024-06-21 16:57:14,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:14,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:57:14,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:14,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:57:14,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:57:14,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:14,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 208 transitions, 2326 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:14,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:14,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:14,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:15,423 INFO L124 PetriNetUnfolderBase]: 2622/3956 cut-off events. [2024-06-21 16:57:15,424 INFO L125 PetriNetUnfolderBase]: For 218792/218794 co-relation queries the response was YES. [2024-06-21 16:57:15,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31090 conditions, 3956 events. 2622/3956 cut-off events. For 218792/218794 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19433 event pairs, 679 based on Foata normal form. 1/3956 useless extension candidates. Maximal degree in co-relation 31012. Up to 3783 conditions per place. [2024-06-21 16:57:15,458 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 187 selfloop transitions, 25 changer transitions 0/217 dead transitions. [2024-06-21 16:57:15,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 217 transitions, 2772 flow [2024-06-21 16:57:15,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:57:15,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:57:15,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 16:57:15,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:57:15,460 INFO L175 Difference]: Start difference. First operand has 157 places, 208 transitions, 2326 flow. Second operand 6 states and 108 transitions. [2024-06-21 16:57:15,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 217 transitions, 2772 flow [2024-06-21 16:57:15,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 217 transitions, 2712 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:57:15,629 INFO L231 Difference]: Finished difference. Result has 159 places, 208 transitions, 2322 flow [2024-06-21 16:57:15,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2322, PETRI_PLACES=159, PETRI_TRANSITIONS=208} [2024-06-21 16:57:15,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-21 16:57:15,630 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 208 transitions, 2322 flow [2024-06-21 16:57:15,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:15,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:15,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:15,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:57:15,630 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:15,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:15,631 INFO L85 PathProgramCache]: Analyzing trace with hash -867208959, now seen corresponding path program 1 times [2024-06-21 16:57:15,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:15,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672417821] [2024-06-21 16:57:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:15,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:16,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:16,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672417821] [2024-06-21 16:57:16,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672417821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:16,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:16,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:57:16,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782263969] [2024-06-21 16:57:16,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:16,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:57:16,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:16,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:57:16,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:57:16,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:57:16,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 208 transitions, 2322 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:16,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:16,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:57:16,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:17,091 INFO L124 PetriNetUnfolderBase]: 2788/4117 cut-off events. [2024-06-21 16:57:17,091 INFO L125 PetriNetUnfolderBase]: For 227432/227432 co-relation queries the response was YES. [2024-06-21 16:57:17,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32206 conditions, 4117 events. 2788/4117 cut-off events. For 227432/227432 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19410 event pairs, 719 based on Foata normal form. 3/4119 useless extension candidates. Maximal degree in co-relation 32127. Up to 4090 conditions per place. [2024-06-21 16:57:17,127 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 206 selfloop transitions, 14 changer transitions 0/223 dead transitions. [2024-06-21 16:57:17,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 223 transitions, 2822 flow [2024-06-21 16:57:17,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:57:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:57:17,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 16:57:17,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-21 16:57:17,129 INFO L175 Difference]: Start difference. First operand has 159 places, 208 transitions, 2322 flow. Second operand 7 states and 110 transitions. [2024-06-21 16:57:17,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 223 transitions, 2822 flow [2024-06-21 16:57:17,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 223 transitions, 2750 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:57:17,325 INFO L231 Difference]: Finished difference. Result has 160 places, 211 transitions, 2322 flow [2024-06-21 16:57:17,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2250, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2322, PETRI_PLACES=160, PETRI_TRANSITIONS=211} [2024-06-21 16:57:17,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 16:57:17,326 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 211 transitions, 2322 flow [2024-06-21 16:57:17,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:17,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:17,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:17,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:57:17,327 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:17,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:17,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1408804264, now seen corresponding path program 1 times [2024-06-21 16:57:17,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:17,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876995740] [2024-06-21 16:57:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:17,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:18,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:18,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876995740] [2024-06-21 16:57:18,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876995740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:18,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:18,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:18,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433913388] [2024-06-21 16:57:18,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:18,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:18,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:18,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:18,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:18,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:18,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 211 transitions, 2322 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:18,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:18,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:18,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:19,104 INFO L124 PetriNetUnfolderBase]: 2994/4525 cut-off events. [2024-06-21 16:57:19,105 INFO L125 PetriNetUnfolderBase]: For 288527/288529 co-relation queries the response was YES. [2024-06-21 16:57:19,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37328 conditions, 4525 events. 2994/4525 cut-off events. For 288527/288529 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 23060 event pairs, 471 based on Foata normal form. 26/4535 useless extension candidates. Maximal degree in co-relation 37249. Up to 2644 conditions per place. [2024-06-21 16:57:19,150 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 193 selfloop transitions, 77 changer transitions 0/275 dead transitions. [2024-06-21 16:57:19,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 275 transitions, 3683 flow [2024-06-21 16:57:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:57:19,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:57:19,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 16:57:19,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2024-06-21 16:57:19,152 INFO L175 Difference]: Start difference. First operand has 160 places, 211 transitions, 2322 flow. Second operand 9 states and 194 transitions. [2024-06-21 16:57:19,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 275 transitions, 3683 flow [2024-06-21 16:57:19,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 275 transitions, 3633 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 16:57:19,421 INFO L231 Difference]: Finished difference. Result has 166 places, 217 transitions, 2642 flow [2024-06-21 16:57:19,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2642, PETRI_PLACES=166, PETRI_TRANSITIONS=217} [2024-06-21 16:57:19,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 16:57:19,422 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 217 transitions, 2642 flow [2024-06-21 16:57:19,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:19,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:19,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:19,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:57:19,423 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:19,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:19,423 INFO L85 PathProgramCache]: Analyzing trace with hash -968629360, now seen corresponding path program 2 times [2024-06-21 16:57:19,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:19,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283510223] [2024-06-21 16:57:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:19,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:20,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:20,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283510223] [2024-06-21 16:57:20,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283510223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:20,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:20,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:20,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159724210] [2024-06-21 16:57:20,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:20,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:20,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:20,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:20,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:20,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 217 transitions, 2642 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:20,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:20,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:20,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:21,293 INFO L124 PetriNetUnfolderBase]: 3298/5022 cut-off events. [2024-06-21 16:57:21,293 INFO L125 PetriNetUnfolderBase]: For 337571/337573 co-relation queries the response was YES. [2024-06-21 16:57:21,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43298 conditions, 5022 events. 3298/5022 cut-off events. For 337571/337573 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 26675 event pairs, 747 based on Foata normal form. 24/5042 useless extension candidates. Maximal degree in co-relation 43216. Up to 3621 conditions per place. [2024-06-21 16:57:21,339 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 99 changer transitions 0/280 dead transitions. [2024-06-21 16:57:21,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 280 transitions, 3992 flow [2024-06-21 16:57:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:57:21,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:57:21,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-21 16:57:21,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-21 16:57:21,341 INFO L175 Difference]: Start difference. First operand has 166 places, 217 transitions, 2642 flow. Second operand 9 states and 191 transitions. [2024-06-21 16:57:21,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 280 transitions, 3992 flow [2024-06-21 16:57:21,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 280 transitions, 3827 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 16:57:21,692 INFO L231 Difference]: Finished difference. Result has 172 places, 227 transitions, 2882 flow [2024-06-21 16:57:21,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2483, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2882, PETRI_PLACES=172, PETRI_TRANSITIONS=227} [2024-06-21 16:57:21,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-21 16:57:21,693 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 227 transitions, 2882 flow [2024-06-21 16:57:21,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:21,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:21,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:21,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:57:21,694 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:21,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:21,694 INFO L85 PathProgramCache]: Analyzing trace with hash -968625640, now seen corresponding path program 3 times [2024-06-21 16:57:21,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:21,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769057428] [2024-06-21 16:57:21,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:21,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:22,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:22,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769057428] [2024-06-21 16:57:22,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769057428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:22,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:22,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:22,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712254561] [2024-06-21 16:57:22,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:22,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:22,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:22,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:22,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:22,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:22,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 227 transitions, 2882 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:22,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:22,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:22,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:23,805 INFO L124 PetriNetUnfolderBase]: 3445/5261 cut-off events. [2024-06-21 16:57:23,806 INFO L125 PetriNetUnfolderBase]: For 382058/382060 co-relation queries the response was YES. [2024-06-21 16:57:23,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45126 conditions, 5261 events. 3445/5261 cut-off events. For 382058/382060 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 28307 event pairs, 788 based on Foata normal form. 62/5322 useless extension candidates. Maximal degree in co-relation 45041. Up to 3964 conditions per place. [2024-06-21 16:57:23,860 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 187 selfloop transitions, 95 changer transitions 0/287 dead transitions. [2024-06-21 16:57:23,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 287 transitions, 4056 flow [2024-06-21 16:57:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:57:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:57:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-21 16:57:23,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2024-06-21 16:57:23,861 INFO L175 Difference]: Start difference. First operand has 172 places, 227 transitions, 2882 flow. Second operand 11 states and 228 transitions. [2024-06-21 16:57:23,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 287 transitions, 4056 flow [2024-06-21 16:57:24,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 287 transitions, 3921 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 16:57:24,210 INFO L231 Difference]: Finished difference. Result has 180 places, 230 transitions, 3069 flow [2024-06-21 16:57:24,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2747, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3069, PETRI_PLACES=180, PETRI_TRANSITIONS=230} [2024-06-21 16:57:24,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 16:57:24,211 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 230 transitions, 3069 flow [2024-06-21 16:57:24,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:24,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:24,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:24,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:57:24,212 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:24,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:24,212 INFO L85 PathProgramCache]: Analyzing trace with hash -881937550, now seen corresponding path program 4 times [2024-06-21 16:57:24,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:24,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223349692] [2024-06-21 16:57:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:24,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:25,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:25,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223349692] [2024-06-21 16:57:25,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223349692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:25,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:25,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:25,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077385128] [2024-06-21 16:57:25,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:25,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:25,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:25,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:25,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:25,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:25,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 230 transitions, 3069 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:25,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:25,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:25,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:26,290 INFO L124 PetriNetUnfolderBase]: 3645/5573 cut-off events. [2024-06-21 16:57:26,290 INFO L125 PetriNetUnfolderBase]: For 381176/381178 co-relation queries the response was YES. [2024-06-21 16:57:26,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49146 conditions, 5573 events. 3645/5573 cut-off events. For 381176/381178 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 30254 event pairs, 900 based on Foata normal form. 26/5592 useless extension candidates. Maximal degree in co-relation 49059. Up to 4397 conditions per place. [2024-06-21 16:57:26,336 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 214 selfloop transitions, 66 changer transitions 0/285 dead transitions. [2024-06-21 16:57:26,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 285 transitions, 4368 flow [2024-06-21 16:57:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:57:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:57:26,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 16:57:26,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-06-21 16:57:26,338 INFO L175 Difference]: Start difference. First operand has 180 places, 230 transitions, 3069 flow. Second operand 9 states and 188 transitions. [2024-06-21 16:57:26,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 285 transitions, 4368 flow [2024-06-21 16:57:26,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 285 transitions, 4076 flow, removed 54 selfloop flow, removed 9 redundant places. [2024-06-21 16:57:26,745 INFO L231 Difference]: Finished difference. Result has 181 places, 235 transitions, 3155 flow [2024-06-21 16:57:26,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3155, PETRI_PLACES=181, PETRI_TRANSITIONS=235} [2024-06-21 16:57:26,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-21 16:57:26,746 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 235 transitions, 3155 flow [2024-06-21 16:57:26,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:26,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:26,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:26,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:57:26,747 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:26,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:26,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1468664541, now seen corresponding path program 1 times [2024-06-21 16:57:26,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:26,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079041175] [2024-06-21 16:57:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:26,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:27,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:27,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079041175] [2024-06-21 16:57:27,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079041175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:27,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:27,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:57:27,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953714024] [2024-06-21 16:57:27,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:27,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:57:27,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:27,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:57:27,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:57:27,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:27,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 235 transitions, 3155 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:27,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:27,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:27,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:28,408 INFO L124 PetriNetUnfolderBase]: 3654/5590 cut-off events. [2024-06-21 16:57:28,409 INFO L125 PetriNetUnfolderBase]: For 373147/373149 co-relation queries the response was YES. [2024-06-21 16:57:28,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48788 conditions, 5590 events. 3654/5590 cut-off events. For 373147/373149 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 30482 event pairs, 942 based on Foata normal form. 6/5595 useless extension candidates. Maximal degree in co-relation 48699. Up to 5027 conditions per place. [2024-06-21 16:57:28,460 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 199 selfloop transitions, 63 changer transitions 0/267 dead transitions. [2024-06-21 16:57:28,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 267 transitions, 4018 flow [2024-06-21 16:57:28,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:57:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:57:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 16:57:28,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-21 16:57:28,462 INFO L175 Difference]: Start difference. First operand has 181 places, 235 transitions, 3155 flow. Second operand 7 states and 143 transitions. [2024-06-21 16:57:28,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 267 transitions, 4018 flow [2024-06-21 16:57:28,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 267 transitions, 3814 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 16:57:28,833 INFO L231 Difference]: Finished difference. Result has 183 places, 240 transitions, 3185 flow [2024-06-21 16:57:28,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3185, PETRI_PLACES=183, PETRI_TRANSITIONS=240} [2024-06-21 16:57:28,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-21 16:57:28,833 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 240 transitions, 3185 flow [2024-06-21 16:57:28,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:28,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:28,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:28,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:57:28,834 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:28,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:28,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1602878576, now seen corresponding path program 5 times [2024-06-21 16:57:28,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:28,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828671450] [2024-06-21 16:57:28,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:28,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:29,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:29,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828671450] [2024-06-21 16:57:29,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828671450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:29,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:29,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:29,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198227412] [2024-06-21 16:57:29,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:29,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:29,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:29,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:29,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:29,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:29,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 240 transitions, 3185 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:29,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:29,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:29,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:30,881 INFO L124 PetriNetUnfolderBase]: 3939/6059 cut-off events. [2024-06-21 16:57:30,881 INFO L125 PetriNetUnfolderBase]: For 436853/436855 co-relation queries the response was YES. [2024-06-21 16:57:30,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53696 conditions, 6059 events. 3939/6059 cut-off events. For 436853/436855 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 33987 event pairs, 882 based on Foata normal form. 24/6082 useless extension candidates. Maximal degree in co-relation 53605. Up to 4445 conditions per place. [2024-06-21 16:57:30,952 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 188 selfloop transitions, 106 changer transitions 0/299 dead transitions. [2024-06-21 16:57:30,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 299 transitions, 4595 flow [2024-06-21 16:57:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:57:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:57:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-21 16:57:30,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-21 16:57:30,954 INFO L175 Difference]: Start difference. First operand has 183 places, 240 transitions, 3185 flow. Second operand 9 states and 196 transitions. [2024-06-21 16:57:30,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 299 transitions, 4595 flow [2024-06-21 16:57:31,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 299 transitions, 4482 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 16:57:31,450 INFO L231 Difference]: Finished difference. Result has 189 places, 245 transitions, 3496 flow [2024-06-21 16:57:31,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3072, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3496, PETRI_PLACES=189, PETRI_TRANSITIONS=245} [2024-06-21 16:57:31,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-21 16:57:31,450 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 245 transitions, 3496 flow [2024-06-21 16:57:31,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:31,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:31,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:31,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:57:31,451 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:31,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:31,451 INFO L85 PathProgramCache]: Analyzing trace with hash 165505544, now seen corresponding path program 6 times [2024-06-21 16:57:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:31,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442024932] [2024-06-21 16:57:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:31,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:32,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:32,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442024932] [2024-06-21 16:57:32,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442024932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:32,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:32,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:32,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433704521] [2024-06-21 16:57:32,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:32,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:32,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:32,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:32,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:32,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:32,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 245 transitions, 3496 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:32,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:32,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:32,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:33,671 INFO L124 PetriNetUnfolderBase]: 4062/6262 cut-off events. [2024-06-21 16:57:33,672 INFO L125 PetriNetUnfolderBase]: For 476474/476476 co-relation queries the response was YES. [2024-06-21 16:57:33,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56612 conditions, 6262 events. 4062/6262 cut-off events. For 476474/476476 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35502 event pairs, 1078 based on Foata normal form. 30/6291 useless extension candidates. Maximal degree in co-relation 56519. Up to 5248 conditions per place. [2024-06-21 16:57:33,725 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 187 selfloop transitions, 103 changer transitions 0/295 dead transitions. [2024-06-21 16:57:33,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 295 transitions, 4586 flow [2024-06-21 16:57:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:57:33,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:57:33,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-21 16:57:33,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-21 16:57:33,727 INFO L175 Difference]: Start difference. First operand has 189 places, 245 transitions, 3496 flow. Second operand 9 states and 191 transitions. [2024-06-21 16:57:33,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 295 transitions, 4586 flow [2024-06-21 16:57:34,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 295 transitions, 4362 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-21 16:57:34,315 INFO L231 Difference]: Finished difference. Result has 193 places, 247 transitions, 3586 flow [2024-06-21 16:57:34,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3276, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3586, PETRI_PLACES=193, PETRI_TRANSITIONS=247} [2024-06-21 16:57:34,316 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-21 16:57:34,316 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 247 transitions, 3586 flow [2024-06-21 16:57:34,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:34,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:34,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:34,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:57:34,317 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:34,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:34,317 INFO L85 PathProgramCache]: Analyzing trace with hash 171219836, now seen corresponding path program 1 times [2024-06-21 16:57:34,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:34,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404713075] [2024-06-21 16:57:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:34,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:35,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:35,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404713075] [2024-06-21 16:57:35,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404713075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:35,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:35,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:57:35,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400181388] [2024-06-21 16:57:35,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:35,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:57:35,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:35,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:57:35,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:57:35,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:35,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 247 transitions, 3586 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:35,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:35,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:35,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:36,447 INFO L124 PetriNetUnfolderBase]: 4078/6294 cut-off events. [2024-06-21 16:57:36,448 INFO L125 PetriNetUnfolderBase]: For 472805/472807 co-relation queries the response was YES. [2024-06-21 16:57:36,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57127 conditions, 6294 events. 4078/6294 cut-off events. For 472805/472807 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 35828 event pairs, 1056 based on Foata normal form. 8/6301 useless extension candidates. Maximal degree in co-relation 57032. Up to 5705 conditions per place. [2024-06-21 16:57:36,519 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 215 selfloop transitions, 61 changer transitions 0/281 dead transitions. [2024-06-21 16:57:36,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 281 transitions, 4419 flow [2024-06-21 16:57:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:57:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:57:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:57:36,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-21 16:57:36,520 INFO L175 Difference]: Start difference. First operand has 193 places, 247 transitions, 3586 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:57:36,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 281 transitions, 4419 flow [2024-06-21 16:57:37,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 281 transitions, 4151 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 16:57:37,111 INFO L231 Difference]: Finished difference. Result has 194 places, 250 transitions, 3561 flow [2024-06-21 16:57:37,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3561, PETRI_PLACES=194, PETRI_TRANSITIONS=250} [2024-06-21 16:57:37,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-21 16:57:37,113 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 250 transitions, 3561 flow [2024-06-21 16:57:37,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:37,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:37,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:37,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:57:37,114 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:37,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:37,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1889847728, now seen corresponding path program 7 times [2024-06-21 16:57:37,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:37,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499702769] [2024-06-21 16:57:37,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:37,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:38,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:38,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499702769] [2024-06-21 16:57:38,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499702769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:38,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:38,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:38,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441026397] [2024-06-21 16:57:38,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:38,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:38,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:38,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:38,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:38,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:38,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 250 transitions, 3561 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:38,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:38,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:38,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:39,432 INFO L124 PetriNetUnfolderBase]: 4214/6510 cut-off events. [2024-06-21 16:57:39,432 INFO L125 PetriNetUnfolderBase]: For 516970/516972 co-relation queries the response was YES. [2024-06-21 16:57:39,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58638 conditions, 6510 events. 4214/6510 cut-off events. For 516970/516972 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 37311 event pairs, 1115 based on Foata normal form. 30/6539 useless extension candidates. Maximal degree in co-relation 58542. Up to 5681 conditions per place. [2024-06-21 16:57:39,509 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 209 selfloop transitions, 78 changer transitions 0/292 dead transitions. [2024-06-21 16:57:39,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 292 transitions, 4451 flow [2024-06-21 16:57:39,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:57:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:57:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 16:57:39,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 16:57:39,511 INFO L175 Difference]: Start difference. First operand has 194 places, 250 transitions, 3561 flow. Second operand 9 states and 180 transitions. [2024-06-21 16:57:39,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 292 transitions, 4451 flow [2024-06-21 16:57:40,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 292 transitions, 4235 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 16:57:40,145 INFO L231 Difference]: Finished difference. Result has 197 places, 252 transitions, 3611 flow [2024-06-21 16:57:40,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3345, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3611, PETRI_PLACES=197, PETRI_TRANSITIONS=252} [2024-06-21 16:57:40,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-21 16:57:40,146 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 252 transitions, 3611 flow [2024-06-21 16:57:40,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:40,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:40,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:40,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:57:40,147 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:40,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:40,148 INFO L85 PathProgramCache]: Analyzing trace with hash 782154450, now seen corresponding path program 2 times [2024-06-21 16:57:40,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:40,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470784374] [2024-06-21 16:57:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:40,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:41,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:41,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470784374] [2024-06-21 16:57:41,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470784374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:41,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:41,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:41,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364258037] [2024-06-21 16:57:41,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:41,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:41,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:41,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:41,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:41,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:41,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 252 transitions, 3611 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:41,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:41,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:41,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:42,359 INFO L124 PetriNetUnfolderBase]: 4670/7190 cut-off events. [2024-06-21 16:57:42,360 INFO L125 PetriNetUnfolderBase]: For 541657/541659 co-relation queries the response was YES. [2024-06-21 16:57:42,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65193 conditions, 7190 events. 4670/7190 cut-off events. For 541657/541659 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 41527 event pairs, 1227 based on Foata normal form. 8/7197 useless extension candidates. Maximal degree in co-relation 65096. Up to 6438 conditions per place. [2024-06-21 16:57:42,439 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 260 selfloop transitions, 74 changer transitions 0/339 dead transitions. [2024-06-21 16:57:42,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 339 transitions, 5626 flow [2024-06-21 16:57:42,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:57:42,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:57:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:57:42,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 16:57:42,440 INFO L175 Difference]: Start difference. First operand has 197 places, 252 transitions, 3611 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:57:42,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 339 transitions, 5626 flow [2024-06-21 16:57:43,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 339 transitions, 5410 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 16:57:43,155 INFO L231 Difference]: Finished difference. Result has 204 places, 296 transitions, 4539 flow [2024-06-21 16:57:43,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4539, PETRI_PLACES=204, PETRI_TRANSITIONS=296} [2024-06-21 16:57:43,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 16:57:43,155 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 296 transitions, 4539 flow [2024-06-21 16:57:43,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:43,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:43,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:43,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:57:43,156 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:43,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:43,157 INFO L85 PathProgramCache]: Analyzing trace with hash 776582820, now seen corresponding path program 3 times [2024-06-21 16:57:43,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:43,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913331865] [2024-06-21 16:57:43,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:43,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:43,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:43,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913331865] [2024-06-21 16:57:43,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913331865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:43,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:43,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:57:43,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790826841] [2024-06-21 16:57:43,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:43,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:57:43,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:43,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:57:43,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:57:44,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:44,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 296 transitions, 4539 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:44,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:44,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:44,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:45,324 INFO L124 PetriNetUnfolderBase]: 4688/7215 cut-off events. [2024-06-21 16:57:45,325 INFO L125 PetriNetUnfolderBase]: For 554032/554040 co-relation queries the response was YES. [2024-06-21 16:57:45,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65748 conditions, 7215 events. 4688/7215 cut-off events. For 554032/554040 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 41763 event pairs, 1145 based on Foata normal form. 20/7234 useless extension candidates. Maximal degree in co-relation 65646. Up to 6359 conditions per place. [2024-06-21 16:57:45,398 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 234 selfloop transitions, 94 changer transitions 0/333 dead transitions. [2024-06-21 16:57:45,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 333 transitions, 5606 flow [2024-06-21 16:57:45,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:57:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:57:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 16:57:45,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-21 16:57:45,399 INFO L175 Difference]: Start difference. First operand has 204 places, 296 transitions, 4539 flow. Second operand 8 states and 163 transitions. [2024-06-21 16:57:45,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 333 transitions, 5606 flow [2024-06-21 16:57:46,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 333 transitions, 5414 flow, removed 95 selfloop flow, removed 1 redundant places. [2024-06-21 16:57:46,252 INFO L231 Difference]: Finished difference. Result has 211 places, 299 transitions, 4674 flow [2024-06-21 16:57:46,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4347, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4674, PETRI_PLACES=211, PETRI_TRANSITIONS=299} [2024-06-21 16:57:46,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-21 16:57:46,253 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 299 transitions, 4674 flow [2024-06-21 16:57:46,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:46,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:46,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:46,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:57:46,254 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:46,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:46,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1602730706, now seen corresponding path program 8 times [2024-06-21 16:57:46,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:46,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503964723] [2024-06-21 16:57:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:46,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:47,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:47,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503964723] [2024-06-21 16:57:47,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503964723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:47,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:47,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:47,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343128177] [2024-06-21 16:57:47,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:47,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:47,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:47,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:47,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:47,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:47,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 299 transitions, 4674 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:47,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:47,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:47,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:48,826 INFO L124 PetriNetUnfolderBase]: 4880/7535 cut-off events. [2024-06-21 16:57:48,827 INFO L125 PetriNetUnfolderBase]: For 645798/645806 co-relation queries the response was YES. [2024-06-21 16:57:48,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69552 conditions, 7535 events. 4880/7535 cut-off events. For 645798/645806 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44298 event pairs, 1174 based on Foata normal form. 56/7590 useless extension candidates. Maximal degree in co-relation 69447. Up to 6333 conditions per place. [2024-06-21 16:57:48,922 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 241 selfloop transitions, 99 changer transitions 0/345 dead transitions. [2024-06-21 16:57:48,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 345 transitions, 5835 flow [2024-06-21 16:57:48,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:57:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:57:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 16:57:48,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2024-06-21 16:57:48,924 INFO L175 Difference]: Start difference. First operand has 211 places, 299 transitions, 4674 flow. Second operand 9 states and 185 transitions. [2024-06-21 16:57:48,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 345 transitions, 5835 flow [2024-06-21 16:57:49,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 345 transitions, 5527 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-21 16:57:49,849 INFO L231 Difference]: Finished difference. Result has 214 places, 302 transitions, 4730 flow [2024-06-21 16:57:49,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4366, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4730, PETRI_PLACES=214, PETRI_TRANSITIONS=302} [2024-06-21 16:57:49,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-21 16:57:49,851 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 302 transitions, 4730 flow [2024-06-21 16:57:49,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:49,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:49,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:49,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:57:49,851 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:49,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:49,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1468365639, now seen corresponding path program 1 times [2024-06-21 16:57:49,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:49,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962140638] [2024-06-21 16:57:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:49,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:50,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:50,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962140638] [2024-06-21 16:57:50,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962140638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:50,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:50,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:57:50,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547155389] [2024-06-21 16:57:50,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:50,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:57:50,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:50,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:57:50,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:57:50,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:57:50,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 302 transitions, 4730 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:50,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:50,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:57:50,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:52,012 INFO L124 PetriNetUnfolderBase]: 5047/7700 cut-off events. [2024-06-21 16:57:52,013 INFO L125 PetriNetUnfolderBase]: For 608086/608092 co-relation queries the response was YES. [2024-06-21 16:57:52,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71050 conditions, 7700 events. 5047/7700 cut-off events. For 608086/608092 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44414 event pairs, 1364 based on Foata normal form. 7/7706 useless extension candidates. Maximal degree in co-relation 70944. Up to 7640 conditions per place. [2024-06-21 16:57:52,126 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 296 selfloop transitions, 25 changer transitions 0/324 dead transitions. [2024-06-21 16:57:52,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 324 transitions, 5620 flow [2024-06-21 16:57:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:57:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:57:52,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 16:57:52,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 16:57:52,128 INFO L175 Difference]: Start difference. First operand has 214 places, 302 transitions, 4730 flow. Second operand 7 states and 119 transitions. [2024-06-21 16:57:52,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 324 transitions, 5620 flow [2024-06-21 16:57:53,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 324 transitions, 5339 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 16:57:53,178 INFO L231 Difference]: Finished difference. Result has 214 places, 308 transitions, 4616 flow [2024-06-21 16:57:53,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4449, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4616, PETRI_PLACES=214, PETRI_TRANSITIONS=308} [2024-06-21 16:57:53,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-21 16:57:53,179 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 308 transitions, 4616 flow [2024-06-21 16:57:53,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:53,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:53,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:53,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:57:53,179 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:53,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:53,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1468366011, now seen corresponding path program 2 times [2024-06-21 16:57:53,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:53,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911980613] [2024-06-21 16:57:53,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:53,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:53,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:53,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911980613] [2024-06-21 16:57:53,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911980613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:53,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:53,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:57:53,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278814869] [2024-06-21 16:57:53,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:53,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:57:53,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:53,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:57:53,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:57:53,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:53,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 308 transitions, 4616 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:53,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:53,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:53,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:55,022 INFO L124 PetriNetUnfolderBase]: 4959/7644 cut-off events. [2024-06-21 16:57:55,022 INFO L125 PetriNetUnfolderBase]: For 619945/619947 co-relation queries the response was YES. [2024-06-21 16:57:55,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69832 conditions, 7644 events. 4959/7644 cut-off events. For 619945/619947 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 44803 event pairs, 1224 based on Foata normal form. 10/7653 useless extension candidates. Maximal degree in co-relation 69725. Up to 6794 conditions per place. [2024-06-21 16:57:55,123 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 236 selfloop transitions, 98 changer transitions 0/341 dead transitions. [2024-06-21 16:57:55,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 341 transitions, 5824 flow [2024-06-21 16:57:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:57:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:57:55,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 16:57:55,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 16:57:55,125 INFO L175 Difference]: Start difference. First operand has 214 places, 308 transitions, 4616 flow. Second operand 7 states and 137 transitions. [2024-06-21 16:57:55,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 341 transitions, 5824 flow [2024-06-21 16:57:56,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 341 transitions, 5741 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 16:57:56,139 INFO L231 Difference]: Finished difference. Result has 218 places, 321 transitions, 5069 flow [2024-06-21 16:57:56,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4533, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5069, PETRI_PLACES=218, PETRI_TRANSITIONS=321} [2024-06-21 16:57:56,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-21 16:57:56,140 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 321 transitions, 5069 flow [2024-06-21 16:57:56,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:56,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:56,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:56,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:57:56,141 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:56,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:56,141 INFO L85 PathProgramCache]: Analyzing trace with hash 53770448, now seen corresponding path program 4 times [2024-06-21 16:57:56,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:56,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333166859] [2024-06-21 16:57:56,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:56,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:56,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:56,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333166859] [2024-06-21 16:57:56,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333166859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:56,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:56,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:57:56,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521544878] [2024-06-21 16:57:56,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:56,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:57:56,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:56,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:57:56,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:57:56,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:57:56,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 321 transitions, 5069 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:56,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:56,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:57:56,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:58,342 INFO L124 PetriNetUnfolderBase]: 4984/7682 cut-off events. [2024-06-21 16:57:58,342 INFO L125 PetriNetUnfolderBase]: For 640388/640392 co-relation queries the response was YES. [2024-06-21 16:57:58,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71360 conditions, 7682 events. 4984/7682 cut-off events. For 640388/640392 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 45186 event pairs, 1421 based on Foata normal form. 10/7691 useless extension candidates. Maximal degree in co-relation 71251. Up to 7439 conditions per place. [2024-06-21 16:57:58,425 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 312 selfloop transitions, 30 changer transitions 0/349 dead transitions. [2024-06-21 16:57:58,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 349 transitions, 5950 flow [2024-06-21 16:57:58,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:57:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:57:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:57:58,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 16:57:58,427 INFO L175 Difference]: Start difference. First operand has 218 places, 321 transitions, 5069 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:57:58,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 349 transitions, 5950 flow [2024-06-21 16:57:59,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 349 transitions, 5740 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 16:57:59,205 INFO L231 Difference]: Finished difference. Result has 222 places, 324 transitions, 5064 flow [2024-06-21 16:57:59,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4859, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5064, PETRI_PLACES=222, PETRI_TRANSITIONS=324} [2024-06-21 16:57:59,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-21 16:57:59,207 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 324 transitions, 5064 flow [2024-06-21 16:57:59,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:59,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:59,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:59,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:57:59,208 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:59,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:59,212 INFO L85 PathProgramCache]: Analyzing trace with hash 319475168, now seen corresponding path program 5 times [2024-06-21 16:57:59,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:59,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567748731] [2024-06-21 16:57:59,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:59,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:59,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:59,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567748731] [2024-06-21 16:57:59,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567748731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:59,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:59,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:59,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594874432] [2024-06-21 16:57:59,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:59,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:59,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:59,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:59,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:58:00,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:58:00,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 324 transitions, 5064 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:00,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:00,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:58:00,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:01,653 INFO L124 PetriNetUnfolderBase]: 5009/7721 cut-off events. [2024-06-21 16:58:01,653 INFO L125 PetriNetUnfolderBase]: For 671961/671965 co-relation queries the response was YES. [2024-06-21 16:58:01,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71807 conditions, 7721 events. 5009/7721 cut-off events. For 671961/671965 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 45363 event pairs, 1351 based on Foata normal form. 10/7730 useless extension candidates. Maximal degree in co-relation 71697. Up to 7454 conditions per place. [2024-06-21 16:58:01,751 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 312 selfloop transitions, 33 changer transitions 0/352 dead transitions. [2024-06-21 16:58:01,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 352 transitions, 5936 flow [2024-06-21 16:58:01,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:58:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:58:01,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:58:01,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 16:58:01,753 INFO L175 Difference]: Start difference. First operand has 222 places, 324 transitions, 5064 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:58:01,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 352 transitions, 5936 flow [2024-06-21 16:58:02,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 352 transitions, 5758 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-21 16:58:02,764 INFO L231 Difference]: Finished difference. Result has 224 places, 327 transitions, 5086 flow [2024-06-21 16:58:02,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4886, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5086, PETRI_PLACES=224, PETRI_TRANSITIONS=327} [2024-06-21 16:58:02,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-21 16:58:02,765 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 327 transitions, 5086 flow [2024-06-21 16:58:02,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:02,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:02,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:02,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:58:02,766 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:02,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:02,767 INFO L85 PathProgramCache]: Analyzing trace with hash 53777888, now seen corresponding path program 6 times [2024-06-21 16:58:02,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:02,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685293980] [2024-06-21 16:58:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:02,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:03,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:03,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685293980] [2024-06-21 16:58:03,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685293980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:03,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:03,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:58:03,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721692354] [2024-06-21 16:58:03,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:03,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:58:03,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:03,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:58:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:58:03,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:58:03,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 327 transitions, 5086 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:03,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:03,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:58:03,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:04,963 INFO L124 PetriNetUnfolderBase]: 5034/7760 cut-off events. [2024-06-21 16:58:04,964 INFO L125 PetriNetUnfolderBase]: For 689197/689201 co-relation queries the response was YES. [2024-06-21 16:58:05,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72645 conditions, 7760 events. 5034/7760 cut-off events. For 689197/689201 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 45669 event pairs, 1443 based on Foata normal form. 10/7769 useless extension candidates. Maximal degree in co-relation 72534. Up to 7462 conditions per place. [2024-06-21 16:58:05,051 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 313 selfloop transitions, 35 changer transitions 0/355 dead transitions. [2024-06-21 16:58:05,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 355 transitions, 5987 flow [2024-06-21 16:58:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:58:05,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:58:05,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:58:05,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 16:58:05,053 INFO L175 Difference]: Start difference. First operand has 224 places, 327 transitions, 5086 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:58:05,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 355 transitions, 5987 flow [2024-06-21 16:58:06,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 355 transitions, 5811 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-21 16:58:06,058 INFO L231 Difference]: Finished difference. Result has 226 places, 330 transitions, 5135 flow [2024-06-21 16:58:06,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4910, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5135, PETRI_PLACES=226, PETRI_TRANSITIONS=330} [2024-06-21 16:58:06,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-21 16:58:06,059 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 330 transitions, 5135 flow [2024-06-21 16:58:06,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:06,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:06,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:06,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:58:06,060 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:06,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:06,060 INFO L85 PathProgramCache]: Analyzing trace with hash 53562686, now seen corresponding path program 9 times [2024-06-21 16:58:06,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:06,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583403672] [2024-06-21 16:58:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:06,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:06,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:06,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583403672] [2024-06-21 16:58:06,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583403672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:06,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:06,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:58:06,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643614130] [2024-06-21 16:58:06,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:06,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:58:06,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:06,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:58:06,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:58:07,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:58:07,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 330 transitions, 5135 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:07,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:07,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:58:07,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:08,492 INFO L124 PetriNetUnfolderBase]: 5095/7863 cut-off events. [2024-06-21 16:58:08,492 INFO L125 PetriNetUnfolderBase]: For 760685/760689 co-relation queries the response was YES. [2024-06-21 16:58:08,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73030 conditions, 7863 events. 5095/7863 cut-off events. For 760685/760689 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 46409 event pairs, 1424 based on Foata normal form. 52/7914 useless extension candidates. Maximal degree in co-relation 72918. Up to 7334 conditions per place. [2024-06-21 16:58:08,580 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 325 selfloop transitions, 36 changer transitions 0/368 dead transitions. [2024-06-21 16:58:08,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 368 transitions, 6131 flow [2024-06-21 16:58:08,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:58:08,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:58:08,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 16:58:08,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:58:08,581 INFO L175 Difference]: Start difference. First operand has 226 places, 330 transitions, 5135 flow. Second operand 9 states and 171 transitions. [2024-06-21 16:58:08,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 368 transitions, 6131 flow [2024-06-21 16:58:09,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 368 transitions, 5933 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-21 16:58:09,604 INFO L231 Difference]: Finished difference. Result has 230 places, 334 transitions, 5200 flow [2024-06-21 16:58:09,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4937, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5200, PETRI_PLACES=230, PETRI_TRANSITIONS=334} [2024-06-21 16:58:09,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-21 16:58:09,605 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 334 transitions, 5200 flow [2024-06-21 16:58:09,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:09,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:09,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:09,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:58:09,606 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:09,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:09,606 INFO L85 PathProgramCache]: Analyzing trace with hash 310278398, now seen corresponding path program 7 times [2024-06-21 16:58:09,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:09,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246401807] [2024-06-21 16:58:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:09,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:10,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:10,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246401807] [2024-06-21 16:58:10,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246401807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:10,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:10,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:58:10,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584389419] [2024-06-21 16:58:10,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:10,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:58:10,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:10,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:58:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:58:10,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:58:10,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 334 transitions, 5200 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:10,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:10,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:58:10,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:12,099 INFO L124 PetriNetUnfolderBase]: 5133/7921 cut-off events. [2024-06-21 16:58:12,099 INFO L125 PetriNetUnfolderBase]: For 731801/731805 co-relation queries the response was YES. [2024-06-21 16:58:12,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74091 conditions, 7921 events. 5133/7921 cut-off events. For 731801/731805 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 46887 event pairs, 1428 based on Foata normal form. 10/7930 useless extension candidates. Maximal degree in co-relation 73977. Up to 7494 conditions per place. [2024-06-21 16:58:12,194 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 304 selfloop transitions, 56 changer transitions 0/367 dead transitions. [2024-06-21 16:58:12,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 367 transitions, 6460 flow [2024-06-21 16:58:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:58:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:58:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:58:12,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 16:58:12,196 INFO L175 Difference]: Start difference. First operand has 230 places, 334 transitions, 5200 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:58:12,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 367 transitions, 6460 flow [2024-06-21 16:58:13,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 367 transitions, 6292 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-21 16:58:13,421 INFO L231 Difference]: Finished difference. Result has 233 places, 340 transitions, 5426 flow [2024-06-21 16:58:13,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5032, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5426, PETRI_PLACES=233, PETRI_TRANSITIONS=340} [2024-06-21 16:58:13,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 16:58:13,421 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 340 transitions, 5426 flow [2024-06-21 16:58:13,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:13,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:13,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:13,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:58:13,422 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:13,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:13,422 INFO L85 PathProgramCache]: Analyzing trace with hash 310270958, now seen corresponding path program 8 times [2024-06-21 16:58:13,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:13,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103455336] [2024-06-21 16:58:13,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:13,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:14,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:14,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103455336] [2024-06-21 16:58:14,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103455336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:14,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:14,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:58:14,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667076011] [2024-06-21 16:58:14,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:14,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:58:14,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:14,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:58:14,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:58:14,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:58:14,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 340 transitions, 5426 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:14,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:14,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:58:14,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:15,906 INFO L124 PetriNetUnfolderBase]: 5120/7902 cut-off events. [2024-06-21 16:58:15,906 INFO L125 PetriNetUnfolderBase]: For 715547/715551 co-relation queries the response was YES. [2024-06-21 16:58:15,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72874 conditions, 7902 events. 5120/7902 cut-off events. For 715547/715551 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 46776 event pairs, 1425 based on Foata normal form. 10/7911 useless extension candidates. Maximal degree in co-relation 72759. Up to 7594 conditions per place. [2024-06-21 16:58:15,999 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 312 selfloop transitions, 46 changer transitions 0/365 dead transitions. [2024-06-21 16:58:15,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 365 transitions, 6208 flow [2024-06-21 16:58:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:58:16,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:58:16,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:58:16,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 16:58:16,000 INFO L175 Difference]: Start difference. First operand has 233 places, 340 transitions, 5426 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:58:16,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 365 transitions, 6208 flow [2024-06-21 16:58:17,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 365 transitions, 5928 flow, removed 117 selfloop flow, removed 4 redundant places. [2024-06-21 16:58:17,311 INFO L231 Difference]: Finished difference. Result has 237 places, 340 transitions, 5250 flow [2024-06-21 16:58:17,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5146, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5250, PETRI_PLACES=237, PETRI_TRANSITIONS=340} [2024-06-21 16:58:17,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-21 16:58:17,312 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 340 transitions, 5250 flow [2024-06-21 16:58:17,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:17,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:17,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:17,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:58:17,312 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:17,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:17,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1756089257, now seen corresponding path program 2 times [2024-06-21 16:58:17,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:17,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972609461] [2024-06-21 16:58:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:17,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:17,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:17,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972609461] [2024-06-21 16:58:17,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972609461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:17,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:17,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:58:17,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815671074] [2024-06-21 16:58:17,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:17,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:58:17,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:17,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:58:17,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:58:17,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:58:17,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 340 transitions, 5250 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:17,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:17,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:58:17,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:19,306 INFO L124 PetriNetUnfolderBase]: 5273/8056 cut-off events. [2024-06-21 16:58:19,306 INFO L125 PetriNetUnfolderBase]: For 722424/722424 co-relation queries the response was YES. [2024-06-21 16:58:19,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73811 conditions, 8056 events. 5273/8056 cut-off events. For 722424/722424 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 46905 event pairs, 1499 based on Foata normal form. 1/8056 useless extension candidates. Maximal degree in co-relation 73694. Up to 8021 conditions per place. [2024-06-21 16:58:19,398 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 330 selfloop transitions, 20 changer transitions 0/353 dead transitions. [2024-06-21 16:58:19,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 353 transitions, 6138 flow [2024-06-21 16:58:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:58:19,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:58:19,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 16:58:19,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-21 16:58:19,399 INFO L175 Difference]: Start difference. First operand has 237 places, 340 transitions, 5250 flow. Second operand 7 states and 111 transitions. [2024-06-21 16:58:19,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 353 transitions, 6138 flow [2024-06-21 16:58:20,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 353 transitions, 6034 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:58:20,295 INFO L231 Difference]: Finished difference. Result has 237 places, 343 transitions, 5238 flow [2024-06-21 16:58:20,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5146, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5238, PETRI_PLACES=237, PETRI_TRANSITIONS=343} [2024-06-21 16:58:20,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-21 16:58:20,296 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 343 transitions, 5238 flow [2024-06-21 16:58:20,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:20,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:20,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:20,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:58:20,296 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:20,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:20,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1113686889, now seen corresponding path program 3 times [2024-06-21 16:58:20,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:20,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630229432] [2024-06-21 16:58:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:20,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:20,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:20,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630229432] [2024-06-21 16:58:20,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630229432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:20,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:20,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:58:20,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974059897] [2024-06-21 16:58:20,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:20,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:58:20,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:20,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:58:20,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:58:20,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:58:20,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 343 transitions, 5238 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:20,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:20,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:58:20,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:22,497 INFO L124 PetriNetUnfolderBase]: 5270/8052 cut-off events. [2024-06-21 16:58:22,498 INFO L125 PetriNetUnfolderBase]: For 741317/741317 co-relation queries the response was YES. [2024-06-21 16:58:22,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73893 conditions, 8052 events. 5270/8052 cut-off events. For 741317/741317 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 46879 event pairs, 1499 based on Foata normal form. 1/8052 useless extension candidates. Maximal degree in co-relation 73775. Up to 8024 conditions per place. [2024-06-21 16:58:22,596 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 334 selfloop transitions, 15 changer transitions 0/352 dead transitions. [2024-06-21 16:58:22,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 352 transitions, 5958 flow [2024-06-21 16:58:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:58:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:58:22,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-21 16:58:22,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-21 16:58:22,597 INFO L175 Difference]: Start difference. First operand has 237 places, 343 transitions, 5238 flow. Second operand 7 states and 108 transitions. [2024-06-21 16:58:22,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 352 transitions, 5958 flow [2024-06-21 16:58:23,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 352 transitions, 5851 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 16:58:23,677 INFO L231 Difference]: Finished difference. Result has 239 places, 343 transitions, 5167 flow [2024-06-21 16:58:23,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5131, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5167, PETRI_PLACES=239, PETRI_TRANSITIONS=343} [2024-06-21 16:58:23,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 16:58:23,677 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 343 transitions, 5167 flow [2024-06-21 16:58:23,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:23,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:23,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:23,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:58:23,678 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:23,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:23,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1114102971, now seen corresponding path program 3 times [2024-06-21 16:58:23,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:23,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701056776] [2024-06-21 16:58:23,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:23,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:24,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:24,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701056776] [2024-06-21 16:58:24,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701056776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:24,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:24,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:58:24,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064457625] [2024-06-21 16:58:24,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:24,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:58:24,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:24,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:58:24,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:58:24,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:58:24,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 343 transitions, 5167 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:24,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:24,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:58:24,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:25,676 INFO L124 PetriNetUnfolderBase]: 5116/7899 cut-off events. [2024-06-21 16:58:25,677 INFO L125 PetriNetUnfolderBase]: For 759396/759398 co-relation queries the response was YES. [2024-06-21 16:58:25,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72954 conditions, 7899 events. 5116/7899 cut-off events. For 759396/759398 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 46708 event pairs, 1446 based on Foata normal form. 6/7904 useless extension candidates. Maximal degree in co-relation 72835. Up to 7686 conditions per place. [2024-06-21 16:58:25,776 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 312 selfloop transitions, 35 changer transitions 0/355 dead transitions. [2024-06-21 16:58:25,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 355 transitions, 6015 flow [2024-06-21 16:58:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:58:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:58:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 16:58:25,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 16:58:25,778 INFO L175 Difference]: Start difference. First operand has 239 places, 343 transitions, 5167 flow. Second operand 7 states and 127 transitions. [2024-06-21 16:58:25,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 355 transitions, 6015 flow [2024-06-21 16:58:27,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 355 transitions, 5965 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:58:27,024 INFO L231 Difference]: Finished difference. Result has 240 places, 343 transitions, 5197 flow [2024-06-21 16:58:27,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5117, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5197, PETRI_PLACES=240, PETRI_TRANSITIONS=343} [2024-06-21 16:58:27,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-21 16:58:27,039 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 343 transitions, 5197 flow [2024-06-21 16:58:27,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:27,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:27,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:27,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:58:27,040 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:27,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:27,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1670742560, now seen corresponding path program 9 times [2024-06-21 16:58:27,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:27,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124085522] [2024-06-21 16:58:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:27,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:27,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:27,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124085522] [2024-06-21 16:58:27,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124085522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:27,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:27,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:58:27,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731824460] [2024-06-21 16:58:27,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:27,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:58:27,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:27,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:58:27,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:58:27,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:58:27,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 343 transitions, 5197 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:27,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:27,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:58:27,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:29,672 INFO L124 PetriNetUnfolderBase]: 5654/8698 cut-off events. [2024-06-21 16:58:29,672 INFO L125 PetriNetUnfolderBase]: For 805081/805083 co-relation queries the response was YES. [2024-06-21 16:58:29,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80585 conditions, 8698 events. 5654/8698 cut-off events. For 805081/805083 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 51999 event pairs, 1234 based on Foata normal form. 8/8705 useless extension candidates. Maximal degree in co-relation 80465. Up to 7238 conditions per place. [2024-06-21 16:58:29,795 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 304 selfloop transitions, 160 changer transitions 0/472 dead transitions. [2024-06-21 16:58:29,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 472 transitions, 8181 flow [2024-06-21 16:58:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:58:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:58:29,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 16:58:29,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-21 16:58:29,812 INFO L175 Difference]: Start difference. First operand has 240 places, 343 transitions, 5197 flow. Second operand 9 states and 181 transitions. [2024-06-21 16:58:29,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 472 transitions, 8181 flow [2024-06-21 16:58:31,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 472 transitions, 7737 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 16:58:31,466 INFO L231 Difference]: Finished difference. Result has 245 places, 411 transitions, 6712 flow [2024-06-21 16:58:31,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4906, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6712, PETRI_PLACES=245, PETRI_TRANSITIONS=411} [2024-06-21 16:58:31,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 16:58:31,467 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 411 transitions, 6712 flow [2024-06-21 16:58:31,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:31,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:31,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:31,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:58:31,468 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:31,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:31,468 INFO L85 PathProgramCache]: Analyzing trace with hash -935025513, now seen corresponding path program 1 times [2024-06-21 16:58:31,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:31,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130455238] [2024-06-21 16:58:31,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:31,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:32,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:32,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130455238] [2024-06-21 16:58:32,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130455238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:32,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:32,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:58:32,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031001302] [2024-06-21 16:58:32,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:32,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:58:32,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:32,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:58:32,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:58:32,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:58:32,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 411 transitions, 6712 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:32,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:32,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:58:32,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:33,778 INFO L124 PetriNetUnfolderBase]: 5817/8857 cut-off events. [2024-06-21 16:58:33,779 INFO L125 PetriNetUnfolderBase]: For 816227/816227 co-relation queries the response was YES. [2024-06-21 16:58:33,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83877 conditions, 8857 events. 5817/8857 cut-off events. For 816227/816227 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 52111 event pairs, 1658 based on Foata normal form. 3/8859 useless extension candidates. Maximal degree in co-relation 83754. Up to 8739 conditions per place. [2024-06-21 16:58:33,894 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 400 selfloop transitions, 31 changer transitions 0/434 dead transitions. [2024-06-21 16:58:33,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 434 transitions, 7864 flow [2024-06-21 16:58:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:58:33,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:58:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 16:58:33,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 16:58:33,896 INFO L175 Difference]: Start difference. First operand has 245 places, 411 transitions, 6712 flow. Second operand 7 states and 122 transitions. [2024-06-21 16:58:33,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 434 transitions, 7864 flow [2024-06-21 16:58:35,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 434 transitions, 7578 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-21 16:58:35,267 INFO L231 Difference]: Finished difference. Result has 248 places, 418 transitions, 6594 flow [2024-06-21 16:58:35,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6426, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6594, PETRI_PLACES=248, PETRI_TRANSITIONS=418} [2024-06-21 16:58:35,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-21 16:58:35,267 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 418 transitions, 6594 flow [2024-06-21 16:58:35,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:35,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:35,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:35,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:58:35,268 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:35,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:35,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1755667595, now seen corresponding path program 2 times [2024-06-21 16:58:35,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:35,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021649584] [2024-06-21 16:58:35,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:35,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:35,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:35,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021649584] [2024-06-21 16:58:35,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021649584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:35,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:35,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:58:35,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917570247] [2024-06-21 16:58:35,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:35,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:58:35,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:35,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:58:35,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:58:35,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:58:35,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 418 transitions, 6594 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:35,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:35,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:58:35,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:37,620 INFO L124 PetriNetUnfolderBase]: 5822/8866 cut-off events. [2024-06-21 16:58:37,620 INFO L125 PetriNetUnfolderBase]: For 832896/832898 co-relation queries the response was YES. [2024-06-21 16:58:37,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83635 conditions, 8866 events. 5822/8866 cut-off events. For 832896/832898 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 52107 event pairs, 1672 based on Foata normal form. 1/8866 useless extension candidates. Maximal degree in co-relation 83511. Up to 8743 conditions per place. [2024-06-21 16:58:37,746 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 395 selfloop transitions, 39 changer transitions 0/437 dead transitions. [2024-06-21 16:58:37,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 437 transitions, 7862 flow [2024-06-21 16:58:37,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:58:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:58:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 16:58:37,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 16:58:37,747 INFO L175 Difference]: Start difference. First operand has 248 places, 418 transitions, 6594 flow. Second operand 7 states and 121 transitions. [2024-06-21 16:58:37,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 437 transitions, 7862 flow [2024-06-21 16:58:39,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 437 transitions, 7784 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 16:58:39,309 INFO L231 Difference]: Finished difference. Result has 252 places, 424 transitions, 6710 flow [2024-06-21 16:58:39,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6520, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6710, PETRI_PLACES=252, PETRI_TRANSITIONS=424} [2024-06-21 16:58:39,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 16:58:39,310 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 424 transitions, 6710 flow [2024-06-21 16:58:39,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:39,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:39,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:39,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:58:39,314 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:39,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:39,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1505334509, now seen corresponding path program 3 times [2024-06-21 16:58:39,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:39,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258579803] [2024-06-21 16:58:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:39,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:39,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:39,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258579803] [2024-06-21 16:58:39,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258579803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:39,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:39,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:58:39,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292061624] [2024-06-21 16:58:39,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:39,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:58:39,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:39,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:58:39,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:58:39,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:58:39,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 424 transitions, 6710 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:39,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:39,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:58:39,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:41,740 INFO L124 PetriNetUnfolderBase]: 5819/8862 cut-off events. [2024-06-21 16:58:41,740 INFO L125 PetriNetUnfolderBase]: For 854570/854572 co-relation queries the response was YES. [2024-06-21 16:58:41,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84027 conditions, 8862 events. 5819/8862 cut-off events. For 854570/854572 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 52133 event pairs, 1672 based on Foata normal form. 1/8862 useless extension candidates. Maximal degree in co-relation 83901. Up to 8741 conditions per place. [2024-06-21 16:58:41,853 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 396 selfloop transitions, 37 changer transitions 0/436 dead transitions. [2024-06-21 16:58:41,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 436 transitions, 7740 flow [2024-06-21 16:58:41,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:58:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:58:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 16:58:41,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 16:58:41,854 INFO L175 Difference]: Start difference. First operand has 252 places, 424 transitions, 6710 flow. Second operand 7 states and 119 transitions. [2024-06-21 16:58:41,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 436 transitions, 7740 flow [2024-06-21 16:58:43,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 436 transitions, 7628 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-21 16:58:43,526 INFO L231 Difference]: Finished difference. Result has 256 places, 424 transitions, 6678 flow [2024-06-21 16:58:43,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6598, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6678, PETRI_PLACES=256, PETRI_TRANSITIONS=424} [2024-06-21 16:58:43,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-21 16:58:43,527 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 424 transitions, 6678 flow [2024-06-21 16:58:43,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:43,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:43,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:43,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:58:43,528 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:43,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:43,528 INFO L85 PathProgramCache]: Analyzing trace with hash -598684856, now seen corresponding path program 1 times [2024-06-21 16:58:43,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:43,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68770736] [2024-06-21 16:58:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:43,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:44,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:44,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68770736] [2024-06-21 16:58:44,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68770736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:44,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:44,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:58:44,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400585054] [2024-06-21 16:58:44,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:44,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:58:44,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:44,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:58:44,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:58:44,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:58:44,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 424 transitions, 6678 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:44,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:44,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:58:44,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:46,130 INFO L124 PetriNetUnfolderBase]: 5709/8755 cut-off events. [2024-06-21 16:58:46,131 INFO L125 PetriNetUnfolderBase]: For 880789/880797 co-relation queries the response was YES. [2024-06-21 16:58:46,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83757 conditions, 8755 events. 5709/8755 cut-off events. For 880789/880797 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 52060 event pairs, 1263 based on Foata normal form. 12/8766 useless extension candidates. Maximal degree in co-relation 83629. Up to 7218 conditions per place. [2024-06-21 16:58:46,240 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 288 selfloop transitions, 165 changer transitions 0/465 dead transitions. [2024-06-21 16:58:46,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 465 transitions, 8068 flow [2024-06-21 16:58:46,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:58:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:58:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 16:58:46,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-21 16:58:46,248 INFO L175 Difference]: Start difference. First operand has 256 places, 424 transitions, 6678 flow. Second operand 9 states and 182 transitions. [2024-06-21 16:58:46,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 465 transitions, 8068 flow [2024-06-21 16:58:47,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 465 transitions, 7978 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:58:47,940 INFO L231 Difference]: Finished difference. Result has 259 places, 429 transitions, 7037 flow [2024-06-21 16:58:47,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6588, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7037, PETRI_PLACES=259, PETRI_TRANSITIONS=429} [2024-06-21 16:58:47,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-21 16:58:47,940 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 429 transitions, 7037 flow [2024-06-21 16:58:47,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:47,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:47,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:47,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:58:47,941 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:47,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:47,941 INFO L85 PathProgramCache]: Analyzing trace with hash -548666931, now seen corresponding path program 1 times [2024-06-21 16:58:47,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:47,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938959024] [2024-06-21 16:58:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:47,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:48,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:48,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938959024] [2024-06-21 16:58:48,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938959024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:48,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:48,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:58:48,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348993509] [2024-06-21 16:58:48,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:48,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:58:48,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:48,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:58:48,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:58:48,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:58:48,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 429 transitions, 7037 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:48,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:48,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:58:48,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:50,381 INFO L124 PetriNetUnfolderBase]: 5899/8968 cut-off events. [2024-06-21 16:58:50,382 INFO L125 PetriNetUnfolderBase]: For 921717/921725 co-relation queries the response was YES. [2024-06-21 16:58:50,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87141 conditions, 8968 events. 5899/8968 cut-off events. For 921717/921725 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 52840 event pairs, 1306 based on Foata normal form. 12/8979 useless extension candidates. Maximal degree in co-relation 87012. Up to 7527 conditions per place. [2024-06-21 16:58:50,486 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 340 selfloop transitions, 135 changer transitions 0/478 dead transitions. [2024-06-21 16:58:50,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 478 transitions, 8835 flow [2024-06-21 16:58:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:58:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:58:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:58:50,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 16:58:50,488 INFO L175 Difference]: Start difference. First operand has 259 places, 429 transitions, 7037 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:58:50,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 478 transitions, 8835 flow [2024-06-21 16:58:52,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 478 transitions, 8469 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 16:58:52,492 INFO L231 Difference]: Finished difference. Result has 262 places, 447 transitions, 7350 flow [2024-06-21 16:58:52,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6671, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7350, PETRI_PLACES=262, PETRI_TRANSITIONS=447} [2024-06-21 16:58:52,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-21 16:58:52,493 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 447 transitions, 7350 flow [2024-06-21 16:58:52,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:52,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:52,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:52,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:58:52,494 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:52,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:52,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1719585504, now seen corresponding path program 1 times [2024-06-21 16:58:52,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:52,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440792510] [2024-06-21 16:58:52,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:52,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:53,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:53,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440792510] [2024-06-21 16:58:53,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440792510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:53,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:53,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:58:53,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890026866] [2024-06-21 16:58:53,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:53,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:58:53,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:53,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:58:53,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:58:53,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:58:53,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 447 transitions, 7350 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:53,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:53,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:58:53,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:54,899 INFO L124 PetriNetUnfolderBase]: 5775/8851 cut-off events. [2024-06-21 16:58:54,899 INFO L125 PetriNetUnfolderBase]: For 958838/958840 co-relation queries the response was YES. [2024-06-21 16:58:54,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87438 conditions, 8851 events. 5775/8851 cut-off events. For 958838/958840 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 52766 event pairs, 1285 based on Foata normal form. 20/8870 useless extension candidates. Maximal degree in co-relation 87306. Up to 7630 conditions per place. [2024-06-21 16:58:55,008 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 328 selfloop transitions, 135 changer transitions 0/480 dead transitions. [2024-06-21 16:58:55,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 480 transitions, 8842 flow [2024-06-21 16:58:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:58:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:58:55,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 16:58:55,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 16:58:55,011 INFO L175 Difference]: Start difference. First operand has 262 places, 447 transitions, 7350 flow. Second operand 7 states and 140 transitions. [2024-06-21 16:58:55,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 480 transitions, 8842 flow [2024-06-21 16:58:56,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 480 transitions, 8701 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-21 16:58:56,688 INFO L231 Difference]: Finished difference. Result has 267 places, 457 transitions, 7720 flow [2024-06-21 16:58:56,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7209, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7720, PETRI_PLACES=267, PETRI_TRANSITIONS=457} [2024-06-21 16:58:56,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-21 16:58:56,688 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 457 transitions, 7720 flow [2024-06-21 16:58:56,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:56,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:56,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:56,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:58:56,689 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:56,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:56,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1550530390, now seen corresponding path program 2 times [2024-06-21 16:58:56,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:56,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451816023] [2024-06-21 16:58:56,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:56,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:57,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:57,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451816023] [2024-06-21 16:58:57,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451816023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:57,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:57,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:58:57,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251380418] [2024-06-21 16:58:57,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:57,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:58:57,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:57,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:58:57,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:58:57,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:58:57,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 457 transitions, 7720 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:57,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:57,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:58:57,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:59,123 INFO L124 PetriNetUnfolderBase]: 5710/8749 cut-off events. [2024-06-21 16:58:59,123 INFO L125 PetriNetUnfolderBase]: For 940184/940186 co-relation queries the response was YES. [2024-06-21 16:58:59,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87022 conditions, 8749 events. 5710/8749 cut-off events. For 940184/940186 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 51899 event pairs, 1329 based on Foata normal form. 8/8756 useless extension candidates. Maximal degree in co-relation 86887. Up to 7558 conditions per place. [2024-06-21 16:58:59,224 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 307 selfloop transitions, 151 changer transitions 0/475 dead transitions. [2024-06-21 16:58:59,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 475 transitions, 8968 flow [2024-06-21 16:58:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:58:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:58:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 16:58:59,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-21 16:58:59,225 INFO L175 Difference]: Start difference. First operand has 267 places, 457 transitions, 7720 flow. Second operand 7 states and 135 transitions. [2024-06-21 16:58:59,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 475 transitions, 8968 flow [2024-06-21 16:59:00,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 475 transitions, 8741 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:59:00,851 INFO L231 Difference]: Finished difference. Result has 270 places, 457 transitions, 7810 flow [2024-06-21 16:59:00,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7493, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7810, PETRI_PLACES=270, PETRI_TRANSITIONS=457} [2024-06-21 16:59:00,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-21 16:59:00,851 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 457 transitions, 7810 flow [2024-06-21 16:59:00,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:00,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:00,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:00,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:59:00,852 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:00,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:00,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1523245435, now seen corresponding path program 1 times [2024-06-21 16:59:00,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:00,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671271832] [2024-06-21 16:59:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:00,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:01,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:01,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671271832] [2024-06-21 16:59:01,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671271832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:01,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:01,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:59:01,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325956133] [2024-06-21 16:59:01,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:01,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:59:01,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:01,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:59:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:59:02,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:59:02,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 457 transitions, 7810 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:02,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:02,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:59:02,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:04,132 INFO L124 PetriNetUnfolderBase]: 5778/8869 cut-off events. [2024-06-21 16:59:04,132 INFO L125 PetriNetUnfolderBase]: For 1014670/1014672 co-relation queries the response was YES. [2024-06-21 16:59:04,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88720 conditions, 8869 events. 5778/8869 cut-off events. For 1014670/1014672 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 53012 event pairs, 1252 based on Foata normal form. 18/8886 useless extension candidates. Maximal degree in co-relation 88584. Up to 7421 conditions per place. [2024-06-21 16:59:04,245 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 301 selfloop transitions, 179 changer transitions 0/497 dead transitions. [2024-06-21 16:59:04,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 497 transitions, 9177 flow [2024-06-21 16:59:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:59:04,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:59:04,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 16:59:04,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 16:59:04,247 INFO L175 Difference]: Start difference. First operand has 270 places, 457 transitions, 7810 flow. Second operand 9 states and 177 transitions. [2024-06-21 16:59:04,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 497 transitions, 9177 flow [2024-06-21 16:59:06,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 497 transitions, 8934 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:59:06,106 INFO L231 Difference]: Finished difference. Result has 275 places, 459 transitions, 8073 flow [2024-06-21 16:59:06,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7567, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8073, PETRI_PLACES=275, PETRI_TRANSITIONS=459} [2024-06-21 16:59:06,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-21 16:59:06,107 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 459 transitions, 8073 flow [2024-06-21 16:59:06,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:06,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:06,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:06,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:59:06,108 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:06,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:06,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1013079291, now seen corresponding path program 2 times [2024-06-21 16:59:06,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:06,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58977978] [2024-06-21 16:59:06,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:06,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:07,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:07,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58977978] [2024-06-21 16:59:07,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58977978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:07,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:07,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:59:07,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721778487] [2024-06-21 16:59:07,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:07,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:59:07,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:07,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:59:07,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:59:07,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:59:07,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 459 transitions, 8073 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:07,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:07,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:59:07,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:09,285 INFO L124 PetriNetUnfolderBase]: 5846/8987 cut-off events. [2024-06-21 16:59:09,285 INFO L125 PetriNetUnfolderBase]: For 1049882/1049884 co-relation queries the response was YES. [2024-06-21 16:59:09,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90810 conditions, 8987 events. 5846/8987 cut-off events. For 1049882/1049884 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 54042 event pairs, 1273 based on Foata normal form. 18/9004 useless extension candidates. Maximal degree in co-relation 90673. Up to 7166 conditions per place. [2024-06-21 16:59:09,403 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 268 selfloop transitions, 213 changer transitions 0/498 dead transitions. [2024-06-21 16:59:09,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 498 transitions, 9438 flow [2024-06-21 16:59:09,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:59:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:59:09,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 16:59:09,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 16:59:09,404 INFO L175 Difference]: Start difference. First operand has 275 places, 459 transitions, 8073 flow. Second operand 9 states and 177 transitions. [2024-06-21 16:59:09,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 498 transitions, 9438 flow [2024-06-21 16:59:11,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 498 transitions, 8963 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 16:59:11,507 INFO L231 Difference]: Finished difference. Result has 277 places, 461 transitions, 8176 flow [2024-06-21 16:59:11,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7598, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8176, PETRI_PLACES=277, PETRI_TRANSITIONS=461} [2024-06-21 16:59:11,507 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 16:59:11,507 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 461 transitions, 8176 flow [2024-06-21 16:59:11,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:11,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:11,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:11,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:59:11,508 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:11,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:11,508 INFO L85 PathProgramCache]: Analyzing trace with hash -589150155, now seen corresponding path program 2 times [2024-06-21 16:59:11,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:11,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390947111] [2024-06-21 16:59:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:11,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:12,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:12,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390947111] [2024-06-21 16:59:12,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390947111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:12,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:12,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:59:12,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611885475] [2024-06-21 16:59:12,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:12,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:59:12,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:12,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:59:12,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:59:12,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:59:12,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 461 transitions, 8176 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:12,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:12,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:59:12,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:14,118 INFO L124 PetriNetUnfolderBase]: 6066/9242 cut-off events. [2024-06-21 16:59:14,118 INFO L125 PetriNetUnfolderBase]: For 1072548/1072550 co-relation queries the response was YES. [2024-06-21 16:59:14,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93381 conditions, 9242 events. 6066/9242 cut-off events. For 1072548/1072550 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 54877 event pairs, 1395 based on Foata normal form. 6/9247 useless extension candidates. Maximal degree in co-relation 93243. Up to 7782 conditions per place. [2024-06-21 16:59:14,244 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 332 selfloop transitions, 164 changer transitions 0/499 dead transitions. [2024-06-21 16:59:14,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 499 transitions, 10132 flow [2024-06-21 16:59:14,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:59:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:59:14,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:59:14,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 16:59:14,246 INFO L175 Difference]: Start difference. First operand has 277 places, 461 transitions, 8176 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:59:14,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 499 transitions, 10132 flow [2024-06-21 16:59:16,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 499 transitions, 9585 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-21 16:59:16,906 INFO L231 Difference]: Finished difference. Result has 279 places, 474 transitions, 8265 flow [2024-06-21 16:59:16,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7629, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8265, PETRI_PLACES=279, PETRI_TRANSITIONS=474} [2024-06-21 16:59:16,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 16:59:16,907 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 474 transitions, 8265 flow [2024-06-21 16:59:16,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:16,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:16,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:16,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:59:16,907 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:16,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:16,908 INFO L85 PathProgramCache]: Analyzing trace with hash -589161315, now seen corresponding path program 3 times [2024-06-21 16:59:16,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:16,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933130168] [2024-06-21 16:59:16,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:16,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:17,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:17,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933130168] [2024-06-21 16:59:17,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933130168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:17,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:17,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:59:17,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350299025] [2024-06-21 16:59:17,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:17,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:59:17,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:17,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:59:17,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:59:17,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:59:17,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 474 transitions, 8265 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:17,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:17,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:59:17,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:19,379 INFO L124 PetriNetUnfolderBase]: 6060/9235 cut-off events. [2024-06-21 16:59:19,379 INFO L125 PetriNetUnfolderBase]: For 1073124/1073126 co-relation queries the response was YES. [2024-06-21 16:59:19,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92543 conditions, 9235 events. 6060/9235 cut-off events. For 1073124/1073126 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 54858 event pairs, 1419 based on Foata normal form. 6/9240 useless extension candidates. Maximal degree in co-relation 92403. Up to 7780 conditions per place. [2024-06-21 16:59:19,509 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 339 selfloop transitions, 157 changer transitions 0/499 dead transitions. [2024-06-21 16:59:19,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 499 transitions, 9865 flow [2024-06-21 16:59:19,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:59:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:59:19,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:59:19,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 16:59:19,510 INFO L175 Difference]: Start difference. First operand has 279 places, 474 transitions, 8265 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:59:19,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 499 transitions, 9865 flow [2024-06-21 16:59:22,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 499 transitions, 9506 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-21 16:59:22,449 INFO L231 Difference]: Finished difference. Result has 283 places, 476 transitions, 8292 flow [2024-06-21 16:59:22,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7930, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8292, PETRI_PLACES=283, PETRI_TRANSITIONS=476} [2024-06-21 16:59:22,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-21 16:59:22,450 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 476 transitions, 8292 flow [2024-06-21 16:59:22,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:22,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:22,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:22,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:59:22,451 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:22,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:22,451 INFO L85 PathProgramCache]: Analyzing trace with hash -265418590, now seen corresponding path program 2 times [2024-06-21 16:59:22,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:22,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009520877] [2024-06-21 16:59:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:22,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:23,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:23,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009520877] [2024-06-21 16:59:23,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009520877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:23,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:23,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:59:23,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820843663] [2024-06-21 16:59:23,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:23,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:59:23,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:23,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:59:23,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:59:23,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:59:23,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 476 transitions, 8292 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:23,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:23,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:59:23,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:25,252 INFO L124 PetriNetUnfolderBase]: 5976/9162 cut-off events. [2024-06-21 16:59:25,252 INFO L125 PetriNetUnfolderBase]: For 1100636/1100638 co-relation queries the response was YES. [2024-06-21 16:59:25,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92407 conditions, 9162 events. 5976/9162 cut-off events. For 1100636/1100638 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 54933 event pairs, 1375 based on Foata normal form. 6/9167 useless extension candidates. Maximal degree in co-relation 92266. Up to 7894 conditions per place. [2024-06-21 16:59:25,386 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 325 selfloop transitions, 157 changer transitions 0/502 dead transitions. [2024-06-21 16:59:25,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 502 transitions, 9726 flow [2024-06-21 16:59:25,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:59:25,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:59:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:59:25,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 16:59:25,388 INFO L175 Difference]: Start difference. First operand has 283 places, 476 transitions, 8292 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:59:25,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 502 transitions, 9726 flow [2024-06-21 16:59:27,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 502 transitions, 9538 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 16:59:27,397 INFO L231 Difference]: Finished difference. Result has 287 places, 481 transitions, 8542 flow [2024-06-21 16:59:27,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8104, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8542, PETRI_PLACES=287, PETRI_TRANSITIONS=481} [2024-06-21 16:59:27,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 16:59:27,399 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 481 transitions, 8542 flow [2024-06-21 16:59:27,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:27,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:27,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:27,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:59:27,400 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:27,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:27,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1725307360, now seen corresponding path program 1 times [2024-06-21 16:59:27,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:27,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005193194] [2024-06-21 16:59:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:27,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:28,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:28,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005193194] [2024-06-21 16:59:28,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005193194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:28,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:28,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:59:28,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537531485] [2024-06-21 16:59:28,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:28,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:59:28,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:28,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:59:28,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:59:28,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:59:28,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 481 transitions, 8542 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:28,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:28,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:59:28,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:29,938 INFO L124 PetriNetUnfolderBase]: 6117/9304 cut-off events. [2024-06-21 16:59:29,938 INFO L125 PetriNetUnfolderBase]: For 1132178/1132184 co-relation queries the response was YES. [2024-06-21 16:59:30,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94153 conditions, 9304 events. 6117/9304 cut-off events. For 1132178/1132184 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 55134 event pairs, 1507 based on Foata normal form. 9/9312 useless extension candidates. Maximal degree in co-relation 94011. Up to 9200 conditions per place. [2024-06-21 16:59:30,070 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 474 selfloop transitions, 35 changer transitions 0/512 dead transitions. [2024-06-21 16:59:30,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 512 transitions, 9896 flow [2024-06-21 16:59:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:59:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:59:30,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:59:30,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 16:59:30,071 INFO L175 Difference]: Start difference. First operand has 287 places, 481 transitions, 8542 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:59:30,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 512 transitions, 9896 flow [2024-06-21 16:59:32,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 512 transitions, 9604 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 16:59:32,522 INFO L231 Difference]: Finished difference. Result has 291 places, 490 transitions, 8471 flow [2024-06-21 16:59:32,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8250, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8471, PETRI_PLACES=291, PETRI_TRANSITIONS=490} [2024-06-21 16:59:32,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-21 16:59:32,523 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 490 transitions, 8471 flow [2024-06-21 16:59:32,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:32,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:32,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:32,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:59:32,524 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:32,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:32,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1379271968, now seen corresponding path program 3 times [2024-06-21 16:59:32,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:32,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535090123] [2024-06-21 16:59:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:32,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:33,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:33,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535090123] [2024-06-21 16:59:33,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535090123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:33,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:33,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:59:33,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530107927] [2024-06-21 16:59:33,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:33,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:59:33,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:33,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:59:33,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:59:33,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:59:33,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 490 transitions, 8471 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:33,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:33,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:59:33,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:34,894 INFO L124 PetriNetUnfolderBase]: 5934/9102 cut-off events. [2024-06-21 16:59:34,894 INFO L125 PetriNetUnfolderBase]: For 1151111/1151111 co-relation queries the response was YES. [2024-06-21 16:59:34,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91954 conditions, 9102 events. 5934/9102 cut-off events. For 1151111/1151111 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 54556 event pairs, 1627 based on Foata normal form. 6/9107 useless extension candidates. Maximal degree in co-relation 91810. Up to 8720 conditions per place. [2024-06-21 16:59:35,026 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 446 selfloop transitions, 42 changer transitions 0/508 dead transitions. [2024-06-21 16:59:35,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 508 transitions, 9659 flow [2024-06-21 16:59:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:59:35,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:59:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 16:59:35,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 16:59:35,027 INFO L175 Difference]: Start difference. First operand has 291 places, 490 transitions, 8471 flow. Second operand 7 states and 129 transitions. [2024-06-21 16:59:35,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 508 transitions, 9659 flow [2024-06-21 16:59:37,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 508 transitions, 9563 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 16:59:37,733 INFO L231 Difference]: Finished difference. Result has 295 places, 490 transitions, 8472 flow [2024-06-21 16:59:37,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8375, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8472, PETRI_PLACES=295, PETRI_TRANSITIONS=490} [2024-06-21 16:59:37,734 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-21 16:59:37,734 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 490 transitions, 8472 flow [2024-06-21 16:59:37,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:37,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:37,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:37,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:59:37,734 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:37,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:37,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1367844128, now seen corresponding path program 4 times [2024-06-21 16:59:37,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:37,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11008232] [2024-06-21 16:59:37,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:37,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:38,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:38,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11008232] [2024-06-21 16:59:38,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11008232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:38,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:38,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:59:38,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092707718] [2024-06-21 16:59:38,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:38,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:59:38,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:38,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:59:38,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:59:38,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:59:38,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 490 transitions, 8472 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:38,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:38,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:59:38,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:40,136 INFO L124 PetriNetUnfolderBase]: 5929/9091 cut-off events. [2024-06-21 16:59:40,136 INFO L125 PetriNetUnfolderBase]: For 1161551/1161551 co-relation queries the response was YES. [2024-06-21 16:59:40,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92050 conditions, 9091 events. 5929/9091 cut-off events. For 1161551/1161551 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 54465 event pairs, 1649 based on Foata normal form. 3/9093 useless extension candidates. Maximal degree in co-relation 91903. Up to 8846 conditions per place. [2024-06-21 16:59:40,275 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 462 selfloop transitions, 24 changer transitions 0/506 dead transitions. [2024-06-21 16:59:40,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 506 transitions, 9551 flow [2024-06-21 16:59:40,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:59:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:59:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 16:59:40,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 16:59:40,277 INFO L175 Difference]: Start difference. First operand has 295 places, 490 transitions, 8472 flow. Second operand 7 states and 123 transitions. [2024-06-21 16:59:40,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 506 transitions, 9551 flow [2024-06-21 16:59:42,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 506 transitions, 9306 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:59:42,926 INFO L231 Difference]: Finished difference. Result has 295 places, 493 transitions, 8355 flow [2024-06-21 16:59:42,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8229, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8355, PETRI_PLACES=295, PETRI_TRANSITIONS=493} [2024-06-21 16:59:42,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-21 16:59:42,927 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 493 transitions, 8355 flow [2024-06-21 16:59:42,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:42,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:42,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:42,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:59:42,927 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:42,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:42,928 INFO L85 PathProgramCache]: Analyzing trace with hash 419777837, now seen corresponding path program 3 times [2024-06-21 16:59:42,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:42,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641504593] [2024-06-21 16:59:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:42,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:43,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:43,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641504593] [2024-06-21 16:59:43,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641504593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:43,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:43,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:59:43,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763243727] [2024-06-21 16:59:43,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:43,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:59:43,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:43,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:59:43,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:59:43,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:59:43,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 493 transitions, 8355 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:43,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:43,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:59:43,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:45,927 INFO L124 PetriNetUnfolderBase]: 5990/9195 cut-off events. [2024-06-21 16:59:45,928 INFO L125 PetriNetUnfolderBase]: For 1241665/1241669 co-relation queries the response was YES. [2024-06-21 16:59:46,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92890 conditions, 9195 events. 5990/9195 cut-off events. For 1241665/1241669 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 55278 event pairs, 1599 based on Foata normal form. 22/9216 useless extension candidates. Maximal degree in co-relation 92742. Up to 8762 conditions per place. [2024-06-21 16:59:46,067 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 472 selfloop transitions, 35 changer transitions 0/527 dead transitions. [2024-06-21 16:59:46,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 527 transitions, 9587 flow [2024-06-21 16:59:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:59:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:59:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 16:59:46,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 16:59:46,068 INFO L175 Difference]: Start difference. First operand has 295 places, 493 transitions, 8355 flow. Second operand 9 states and 167 transitions. [2024-06-21 16:59:46,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 527 transitions, 9587 flow [2024-06-21 16:59:49,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 527 transitions, 9512 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 16:59:49,293 INFO L231 Difference]: Finished difference. Result has 298 places, 495 transitions, 8481 flow [2024-06-21 16:59:49,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8280, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8481, PETRI_PLACES=298, PETRI_TRANSITIONS=495} [2024-06-21 16:59:49,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-21 16:59:49,294 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 495 transitions, 8481 flow [2024-06-21 16:59:49,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:49,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:49,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:49,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:59:49,294 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:49,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:49,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1667115559, now seen corresponding path program 4 times [2024-06-21 16:59:49,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:49,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11134359] [2024-06-21 16:59:49,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:49,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:50,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:50,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11134359] [2024-06-21 16:59:50,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11134359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:50,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:50,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:59:50,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155822778] [2024-06-21 16:59:50,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:50,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:59:50,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:50,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:59:50,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:59:50,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:59:50,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 495 transitions, 8481 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:50,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:50,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:59:50,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:52,309 INFO L124 PetriNetUnfolderBase]: 6051/9301 cut-off events. [2024-06-21 16:59:52,310 INFO L125 PetriNetUnfolderBase]: For 1299368/1299372 co-relation queries the response was YES. [2024-06-21 16:59:52,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93675 conditions, 9301 events. 6051/9301 cut-off events. For 1299368/1299372 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 56258 event pairs, 1614 based on Foata normal form. 40/9340 useless extension candidates. Maximal degree in co-relation 93526. Up to 8595 conditions per place. [2024-06-21 16:59:52,442 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 449 selfloop transitions, 62 changer transitions 0/531 dead transitions. [2024-06-21 16:59:52,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 531 transitions, 9788 flow [2024-06-21 16:59:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:59:52,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:59:52,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 16:59:52,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 16:59:52,443 INFO L175 Difference]: Start difference. First operand has 298 places, 495 transitions, 8481 flow. Second operand 9 states and 170 transitions. [2024-06-21 16:59:52,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 531 transitions, 9788 flow [2024-06-21 16:59:55,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 531 transitions, 9611 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-21 16:59:55,432 INFO L231 Difference]: Finished difference. Result has 300 places, 498 transitions, 8620 flow [2024-06-21 16:59:55,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8304, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8620, PETRI_PLACES=300, PETRI_TRANSITIONS=498} [2024-06-21 16:59:55,432 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-21 16:59:55,432 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 498 transitions, 8620 flow [2024-06-21 16:59:55,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:55,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:55,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:55,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:59:55,433 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:55,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:55,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1028466137, now seen corresponding path program 5 times [2024-06-21 16:59:55,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:55,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056164947] [2024-06-21 16:59:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:55,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:56,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:56,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056164947] [2024-06-21 16:59:56,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056164947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:56,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:56,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:59:56,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834505069] [2024-06-21 16:59:56,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:56,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:59:56,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:56,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:59:56,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:59:56,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:59:56,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 498 transitions, 8620 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:56,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:56,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:59:56,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:58,288 INFO L124 PetriNetUnfolderBase]: 6051/9299 cut-off events. [2024-06-21 16:59:58,291 INFO L125 PetriNetUnfolderBase]: For 1258690/1258694 co-relation queries the response was YES. [2024-06-21 16:59:58,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92828 conditions, 9299 events. 6051/9299 cut-off events. For 1258690/1258694 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 56180 event pairs, 1607 based on Foata normal form. 22/9320 useless extension candidates. Maximal degree in co-relation 92678. Up to 8708 conditions per place. [2024-06-21 16:59:58,637 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 462 selfloop transitions, 53 changer transitions 0/535 dead transitions. [2024-06-21 16:59:58,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 535 transitions, 9908 flow [2024-06-21 16:59:58,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:59:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:59:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 16:59:58,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 16:59:58,639 INFO L175 Difference]: Start difference. First operand has 300 places, 498 transitions, 8620 flow. Second operand 9 states and 169 transitions. [2024-06-21 16:59:58,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 535 transitions, 9908 flow [2024-06-21 17:00:01,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 535 transitions, 9631 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-21 17:00:01,165 INFO L231 Difference]: Finished difference. Result has 302 places, 501 transitions, 8605 flow [2024-06-21 17:00:01,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8343, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8605, PETRI_PLACES=302, PETRI_TRANSITIONS=501} [2024-06-21 17:00:01,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-21 17:00:01,171 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 501 transitions, 8605 flow [2024-06-21 17:00:01,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:01,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:01,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:01,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:00:01,172 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:00:01,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:01,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1028459627, now seen corresponding path program 6 times [2024-06-21 17:00:01,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:01,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461101597] [2024-06-21 17:00:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:01,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:02,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:02,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461101597] [2024-06-21 17:00:02,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461101597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:02,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:02,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:00:02,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992586155] [2024-06-21 17:00:02,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:02,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:00:02,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:02,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:00:02,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:00:02,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:00:02,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 501 transitions, 8605 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:02,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:02,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:00:02,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:04,311 INFO L124 PetriNetUnfolderBase]: 6051/9299 cut-off events. [2024-06-21 17:00:04,311 INFO L125 PetriNetUnfolderBase]: For 1237007/1237011 co-relation queries the response was YES. [2024-06-21 17:00:04,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90541 conditions, 9299 events. 6051/9299 cut-off events. For 1237007/1237011 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 56130 event pairs, 1603 based on Foata normal form. 28/9326 useless extension candidates. Maximal degree in co-relation 90390. Up to 8610 conditions per place. [2024-06-21 17:00:04,438 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 462 selfloop transitions, 55 changer transitions 0/537 dead transitions. [2024-06-21 17:00:04,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 537 transitions, 9698 flow [2024-06-21 17:00:04,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:00:04,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:00:04,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 17:00:04,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 17:00:04,446 INFO L175 Difference]: Start difference. First operand has 302 places, 501 transitions, 8605 flow. Second operand 9 states and 171 transitions. [2024-06-21 17:00:04,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 537 transitions, 9698 flow [2024-06-21 17:00:07,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 537 transitions, 9468 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-21 17:00:07,358 INFO L231 Difference]: Finished difference. Result has 303 places, 501 transitions, 8412 flow [2024-06-21 17:00:07,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8263, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8412, PETRI_PLACES=303, PETRI_TRANSITIONS=501} [2024-06-21 17:00:07,358 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-21 17:00:07,358 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 501 transitions, 8412 flow [2024-06-21 17:00:07,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:07,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:07,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:07,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:00:07,359 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:00:07,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1395801858, now seen corresponding path program 5 times [2024-06-21 17:00:07,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:07,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242909872] [2024-06-21 17:00:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:07,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:07,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:07,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242909872] [2024-06-21 17:00:07,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242909872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:07,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:07,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:00:07,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241201352] [2024-06-21 17:00:07,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:07,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:00:07,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:07,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:00:07,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:00:08,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:00:08,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 501 transitions, 8412 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:08,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:08,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:00:08,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:10,053 INFO L124 PetriNetUnfolderBase]: 6031/9269 cut-off events. [2024-06-21 17:00:10,053 INFO L125 PetriNetUnfolderBase]: For 1183327/1183329 co-relation queries the response was YES. [2024-06-21 17:00:10,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89748 conditions, 9269 events. 6031/9269 cut-off events. For 1183327/1183329 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 55880 event pairs, 1658 based on Foata normal form. 4/9272 useless extension candidates. Maximal degree in co-relation 89596. Up to 8990 conditions per place. [2024-06-21 17:00:10,187 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 456 selfloop transitions, 36 changer transitions 0/512 dead transitions. [2024-06-21 17:00:10,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 512 transitions, 9592 flow [2024-06-21 17:00:10,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:00:10,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:00:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:00:10,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 17:00:10,189 INFO L175 Difference]: Start difference. First operand has 303 places, 501 transitions, 8412 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:00:10,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 512 transitions, 9592 flow [2024-06-21 17:00:13,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 512 transitions, 9283 flow, removed 53 selfloop flow, removed 9 redundant places. [2024-06-21 17:00:13,309 INFO L231 Difference]: Finished difference. Result has 301 places, 501 transitions, 8183 flow [2024-06-21 17:00:13,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8103, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8183, PETRI_PLACES=301, PETRI_TRANSITIONS=501} [2024-06-21 17:00:13,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-21 17:00:13,310 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 501 transitions, 8183 flow [2024-06-21 17:00:13,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:13,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:13,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:13,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:00:13,311 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:00:13,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:13,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1143247726, now seen corresponding path program 6 times [2024-06-21 17:00:13,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:13,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719269762] [2024-06-21 17:00:13,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:13,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:13,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:13,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719269762] [2024-06-21 17:00:13,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719269762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:13,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:13,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:00:13,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053855986] [2024-06-21 17:00:13,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:13,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:00:13,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:13,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:00:13,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:00:13,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:00:13,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 501 transitions, 8183 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:13,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:13,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:00:13,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:15,706 INFO L124 PetriNetUnfolderBase]: 5947/9127 cut-off events. [2024-06-21 17:00:15,706 INFO L125 PetriNetUnfolderBase]: For 1199289/1199291 co-relation queries the response was YES. [2024-06-21 17:00:15,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87380 conditions, 9127 events. 5947/9127 cut-off events. For 1199289/1199291 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 54818 event pairs, 1639 based on Foata normal form. 3/9129 useless extension candidates. Maximal degree in co-relation 87229. Up to 8886 conditions per place. [2024-06-21 17:00:15,833 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 24 changer transitions 0/510 dead transitions. [2024-06-21 17:00:15,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 510 transitions, 9187 flow [2024-06-21 17:00:15,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:00:15,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:00:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:00:15,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 17:00:15,835 INFO L175 Difference]: Start difference. First operand has 301 places, 501 transitions, 8183 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:00:15,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 510 transitions, 9187 flow [2024-06-21 17:00:18,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 510 transitions, 9037 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:00:18,256 INFO L231 Difference]: Finished difference. Result has 302 places, 501 transitions, 8087 flow [2024-06-21 17:00:18,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8033, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8087, PETRI_PLACES=302, PETRI_TRANSITIONS=501} [2024-06-21 17:00:18,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-21 17:00:18,257 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 501 transitions, 8087 flow [2024-06-21 17:00:18,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:18,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:18,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:18,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:00:18,257 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:00:18,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:18,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2022638794, now seen corresponding path program 2 times [2024-06-21 17:00:18,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:18,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433601744] [2024-06-21 17:00:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:18,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:18,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:18,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433601744] [2024-06-21 17:00:18,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433601744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:18,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:18,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:00:18,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489808222] [2024-06-21 17:00:18,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:18,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:00:18,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:18,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:00:18,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:00:18,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:00:18,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 501 transitions, 8087 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:18,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:18,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:00:18,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:20,681 INFO L124 PetriNetUnfolderBase]: 6103/9296 cut-off events. [2024-06-21 17:00:20,681 INFO L125 PetriNetUnfolderBase]: For 1215624/1215624 co-relation queries the response was YES. [2024-06-21 17:00:20,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88565 conditions, 9296 events. 6103/9296 cut-off events. For 1215624/1215624 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 55215 event pairs, 1679 based on Foata normal form. 3/9298 useless extension candidates. Maximal degree in co-relation 88413. Up to 9231 conditions per place. [2024-06-21 17:00:20,817 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 496 selfloop transitions, 23 changer transitions 0/522 dead transitions. [2024-06-21 17:00:20,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 522 transitions, 9435 flow [2024-06-21 17:00:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:00:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:00:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 17:00:20,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 17:00:20,819 INFO L175 Difference]: Start difference. First operand has 302 places, 501 transitions, 8087 flow. Second operand 8 states and 126 transitions. [2024-06-21 17:00:20,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 522 transitions, 9435 flow [2024-06-21 17:00:23,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 522 transitions, 9295 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 17:00:23,208 INFO L231 Difference]: Finished difference. Result has 301 places, 507 transitions, 8111 flow [2024-06-21 17:00:23,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7949, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8111, PETRI_PLACES=301, PETRI_TRANSITIONS=507} [2024-06-21 17:00:23,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-21 17:00:23,209 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 507 transitions, 8111 flow [2024-06-21 17:00:23,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:23,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:23,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:23,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:00:23,210 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:00:23,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:23,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2022639197, now seen corresponding path program 4 times [2024-06-21 17:00:23,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:23,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377278753] [2024-06-21 17:00:23,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:23,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:23,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:23,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377278753] [2024-06-21 17:00:23,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377278753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:23,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:23,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:00:23,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783880583] [2024-06-21 17:00:23,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:23,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:00:23,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:23,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:00:23,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:00:23,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:00:23,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 507 transitions, 8111 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:23,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:23,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:00:23,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:25,674 INFO L124 PetriNetUnfolderBase]: 6161/9379 cut-off events. [2024-06-21 17:00:25,674 INFO L125 PetriNetUnfolderBase]: For 1232535/1232537 co-relation queries the response was YES. [2024-06-21 17:00:25,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89644 conditions, 9379 events. 6161/9379 cut-off events. For 1232535/1232537 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 55757 event pairs, 1690 based on Foata normal form. 6/9384 useless extension candidates. Maximal degree in co-relation 89491. Up to 9243 conditions per place. [2024-06-21 17:00:25,805 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 483 selfloop transitions, 46 changer transitions 0/532 dead transitions. [2024-06-21 17:00:25,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 532 transitions, 9789 flow [2024-06-21 17:00:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:00:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:00:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:00:25,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:00:25,807 INFO L175 Difference]: Start difference. First operand has 301 places, 507 transitions, 8111 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:00:25,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 532 transitions, 9789 flow [2024-06-21 17:00:28,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 532 transitions, 9729 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 17:00:28,455 INFO L231 Difference]: Finished difference. Result has 307 places, 518 transitions, 8428 flow [2024-06-21 17:00:28,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8051, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8428, PETRI_PLACES=307, PETRI_TRANSITIONS=518} [2024-06-21 17:00:28,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-21 17:00:28,456 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 518 transitions, 8428 flow [2024-06-21 17:00:28,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:28,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:28,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:28,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:00:28,456 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:00:28,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:28,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2022193324, now seen corresponding path program 3 times [2024-06-21 17:00:28,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:28,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126057479] [2024-06-21 17:00:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:28,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:29,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:29,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126057479] [2024-06-21 17:00:29,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126057479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:29,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:29,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:00:29,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479877592] [2024-06-21 17:00:29,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:29,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:00:29,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:29,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:00:29,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:00:29,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:00:29,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 518 transitions, 8428 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:29,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:29,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:00:29,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:31,031 INFO L124 PetriNetUnfolderBase]: 6152/9365 cut-off events. [2024-06-21 17:00:31,032 INFO L125 PetriNetUnfolderBase]: For 1248458/1248458 co-relation queries the response was YES. [2024-06-21 17:00:31,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89904 conditions, 9365 events. 6152/9365 cut-off events. For 1248458/1248458 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 55657 event pairs, 1681 based on Foata normal form. 3/9367 useless extension candidates. Maximal degree in co-relation 89749. Up to 9317 conditions per place. [2024-06-21 17:00:31,169 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 509 selfloop transitions, 18 changer transitions 0/530 dead transitions. [2024-06-21 17:00:31,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 530 transitions, 9514 flow [2024-06-21 17:00:31,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:00:31,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:00:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 17:00:31,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-21 17:00:31,171 INFO L175 Difference]: Start difference. First operand has 307 places, 518 transitions, 8428 flow. Second operand 8 states and 121 transitions. [2024-06-21 17:00:31,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 530 transitions, 9514 flow [2024-06-21 17:00:33,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 530 transitions, 9306 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-21 17:00:33,220 INFO L231 Difference]: Finished difference. Result has 312 places, 518 transitions, 8262 flow [2024-06-21 17:00:33,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8220, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8262, PETRI_PLACES=312, PETRI_TRANSITIONS=518} [2024-06-21 17:00:33,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-21 17:00:33,221 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 518 transitions, 8262 flow [2024-06-21 17:00:33,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:33,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:33,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:33,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:00:33,221 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:00:33,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:33,222 INFO L85 PathProgramCache]: Analyzing trace with hash -177451851, now seen corresponding path program 5 times [2024-06-21 17:00:33,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:33,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738141567] [2024-06-21 17:00:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:33,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:33,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:33,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738141567] [2024-06-21 17:00:33,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738141567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:33,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:33,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:00:33,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620914920] [2024-06-21 17:00:33,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:33,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:00:33,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:00:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:00:34,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:00:34,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 518 transitions, 8262 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:34,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:34,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:00:34,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:35,952 INFO L124 PetriNetUnfolderBase]: 6204/9439 cut-off events. [2024-06-21 17:00:35,952 INFO L125 PetriNetUnfolderBase]: For 1292286/1292288 co-relation queries the response was YES. [2024-06-21 17:00:36,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90801 conditions, 9439 events. 6204/9439 cut-off events. For 1292286/1292288 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 56121 event pairs, 1686 based on Foata normal form. 6/9444 useless extension candidates. Maximal degree in co-relation 90644. Up to 9195 conditions per place. [2024-06-21 17:00:36,104 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 471 selfloop transitions, 74 changer transitions 0/548 dead transitions. [2024-06-21 17:00:36,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 548 transitions, 10269 flow [2024-06-21 17:00:36,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:00:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:00:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:00:36,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:00:36,106 INFO L175 Difference]: Start difference. First operand has 312 places, 518 transitions, 8262 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:00:36,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 548 transitions, 10269 flow [2024-06-21 17:00:38,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 548 transitions, 10224 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:00:38,594 INFO L231 Difference]: Finished difference. Result has 315 places, 532 transitions, 8780 flow [2024-06-21 17:00:38,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8217, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8780, PETRI_PLACES=315, PETRI_TRANSITIONS=532} [2024-06-21 17:00:38,595 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-21 17:00:38,595 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 532 transitions, 8780 flow [2024-06-21 17:00:38,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:38,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:38,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:38,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:00:38,596 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:00:38,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:38,596 INFO L85 PathProgramCache]: Analyzing trace with hash -177452192, now seen corresponding path program 3 times [2024-06-21 17:00:38,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:38,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656755021] [2024-06-21 17:00:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:38,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:39,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:39,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656755021] [2024-06-21 17:00:39,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656755021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:39,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:39,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:00:39,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291949760] [2024-06-21 17:00:39,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:39,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:00:39,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:39,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:00:39,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:00:39,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:00:39,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 532 transitions, 8780 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:39,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:39,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:00:39,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:41,308 INFO L124 PetriNetUnfolderBase]: 6051/9270 cut-off events. [2024-06-21 17:00:41,308 INFO L125 PetriNetUnfolderBase]: For 1309939/1309941 co-relation queries the response was YES. [2024-06-21 17:00:41,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90069 conditions, 9270 events. 6051/9270 cut-off events. For 1309939/1309941 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 55692 event pairs, 1640 based on Foata normal form. 6/9275 useless extension candidates. Maximal degree in co-relation 89909. Up to 8942 conditions per place. [2024-06-21 17:00:41,442 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 477 selfloop transitions, 43 changer transitions 0/545 dead transitions. [2024-06-21 17:00:41,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 545 transitions, 9864 flow [2024-06-21 17:00:41,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:00:41,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:00:41,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:00:41,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:00:41,443 INFO L175 Difference]: Start difference. First operand has 315 places, 532 transitions, 8780 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:00:41,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 545 transitions, 9864 flow [2024-06-21 17:00:43,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 545 transitions, 9642 flow, removed 91 selfloop flow, removed 3 redundant places. [2024-06-21 17:00:43,685 INFO L231 Difference]: Finished difference. Result has 320 places, 532 transitions, 8652 flow [2024-06-21 17:00:43,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8558, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8652, PETRI_PLACES=320, PETRI_TRANSITIONS=532} [2024-06-21 17:00:43,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 17:00:43,685 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 532 transitions, 8652 flow [2024-06-21 17:00:43,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:43,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:43,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:43,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:00:43,686 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:00:43,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:43,686 INFO L85 PathProgramCache]: Analyzing trace with hash -177440288, now seen corresponding path program 4 times [2024-06-21 17:00:43,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:43,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571810053] [2024-06-21 17:00:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:43,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:44,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:44,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571810053] [2024-06-21 17:00:44,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571810053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:44,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:44,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:00:44,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739147157] [2024-06-21 17:00:44,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:44,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:00:44,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:00:44,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:00:44,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:00:44,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 532 transitions, 8652 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:44,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:44,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:00:44,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:46,246 INFO L124 PetriNetUnfolderBase]: 6166/9380 cut-off events. [2024-06-21 17:00:46,246 INFO L125 PetriNetUnfolderBase]: For 1315215/1315215 co-relation queries the response was YES. [2024-06-21 17:00:46,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90485 conditions, 9380 events. 6166/9380 cut-off events. For 1315215/1315215 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 55722 event pairs, 1685 based on Foata normal form. 3/9382 useless extension candidates. Maximal degree in co-relation 90323. Up to 9305 conditions per place. [2024-06-21 17:00:46,392 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 513 selfloop transitions, 30 changer transitions 0/546 dead transitions. [2024-06-21 17:00:46,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 546 transitions, 9776 flow [2024-06-21 17:00:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:00:46,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:00:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:00:46,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 17:00:46,393 INFO L175 Difference]: Start difference. First operand has 320 places, 532 transitions, 8652 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:00:46,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 546 transitions, 9776 flow [2024-06-21 17:00:48,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 546 transitions, 9585 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 17:00:48,928 INFO L231 Difference]: Finished difference. Result has 322 places, 532 transitions, 8527 flow [2024-06-21 17:00:48,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8461, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8527, PETRI_PLACES=322, PETRI_TRANSITIONS=532} [2024-06-21 17:00:48,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-21 17:00:48,929 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 532 transitions, 8527 flow [2024-06-21 17:00:48,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:48,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:48,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:48,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:00:48,930 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:00:48,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:48,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2035526207, now seen corresponding path program 6 times [2024-06-21 17:00:48,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:48,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57530405] [2024-06-21 17:00:48,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:48,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:49,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:49,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57530405] [2024-06-21 17:00:49,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57530405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:49,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:49,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:00:49,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666450347] [2024-06-21 17:00:49,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:49,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:00:49,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:49,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:00:49,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:00:49,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:00:49,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 532 transitions, 8527 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:49,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:49,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:00:49,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:51,712 INFO L124 PetriNetUnfolderBase]: 6160/9375 cut-off events. [2024-06-21 17:00:51,712 INFO L125 PetriNetUnfolderBase]: For 1331686/1331688 co-relation queries the response was YES. [2024-06-21 17:00:51,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90035 conditions, 9375 events. 6160/9375 cut-off events. For 1331686/1331688 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 55741 event pairs, 1681 based on Foata normal form. 6/9380 useless extension candidates. Maximal degree in co-relation 89872. Up to 9136 conditions per place. [2024-06-21 17:00:51,917 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 476 selfloop transitions, 69 changer transitions 0/548 dead transitions. [2024-06-21 17:00:51,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 548 transitions, 10195 flow [2024-06-21 17:00:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:00:51,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:00:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:00:51,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:00:51,919 INFO L175 Difference]: Start difference. First operand has 322 places, 532 transitions, 8527 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:00:51,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 548 transitions, 10195 flow [2024-06-21 17:00:55,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 548 transitions, 10033 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 17:00:55,016 INFO L231 Difference]: Finished difference. Result has 322 places, 532 transitions, 8512 flow [2024-06-21 17:00:55,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8365, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8512, PETRI_PLACES=322, PETRI_TRANSITIONS=532} [2024-06-21 17:00:55,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-21 17:00:55,017 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 532 transitions, 8512 flow [2024-06-21 17:00:55,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:55,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:55,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:55,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 17:00:55,017 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:00:55,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:55,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1079956505, now seen corresponding path program 1 times [2024-06-21 17:00:55,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:55,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755175556] [2024-06-21 17:00:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:55,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:55,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:55,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755175556] [2024-06-21 17:00:55,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755175556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:55,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:55,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:00:55,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020984342] [2024-06-21 17:00:55,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:55,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:00:55,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:55,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:00:55,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:00:55,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:00:55,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 532 transitions, 8512 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:55,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:55,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:00:55,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:57,566 INFO L124 PetriNetUnfolderBase]: 6170/9387 cut-off events. [2024-06-21 17:00:57,566 INFO L125 PetriNetUnfolderBase]: For 1352606/1352606 co-relation queries the response was YES. [2024-06-21 17:00:57,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90437 conditions, 9387 events. 6170/9387 cut-off events. For 1352606/1352606 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 55774 event pairs, 1684 based on Foata normal form. 2/9388 useless extension candidates. Maximal degree in co-relation 90274. Up to 9264 conditions per place. [2024-06-21 17:00:57,704 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 504 selfloop transitions, 47 changer transitions 0/554 dead transitions. [2024-06-21 17:00:57,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 554 transitions, 9934 flow [2024-06-21 17:00:57,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:00:57,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:00:57,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:00:57,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 17:00:57,705 INFO L175 Difference]: Start difference. First operand has 322 places, 532 transitions, 8512 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:00:57,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 554 transitions, 9934 flow [2024-06-21 17:01:00,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 554 transitions, 9603 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-21 17:01:00,818 INFO L231 Difference]: Finished difference. Result has 320 places, 537 transitions, 8372 flow [2024-06-21 17:01:00,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8190, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8372, PETRI_PLACES=320, PETRI_TRANSITIONS=537} [2024-06-21 17:01:00,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 17:01:00,833 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 537 transitions, 8372 flow [2024-06-21 17:01:00,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:00,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:00,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:00,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 17:01:00,834 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:01:00,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:00,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1367830240, now seen corresponding path program 1 times [2024-06-21 17:01:00,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:00,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595164175] [2024-06-21 17:01:00,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:00,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:01,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:01,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595164175] [2024-06-21 17:01:01,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595164175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:01,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:01,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:01:01,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258131791] [2024-06-21 17:01:01,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:01,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:01:01,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:01,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:01:01,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:01:01,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:01:01,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 537 transitions, 8372 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:01,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:01,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:01:01,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:03,582 INFO L124 PetriNetUnfolderBase]: 6215/9450 cut-off events. [2024-06-21 17:01:03,582 INFO L125 PetriNetUnfolderBase]: For 1407792/1407792 co-relation queries the response was YES. [2024-06-21 17:01:03,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90249 conditions, 9450 events. 6215/9450 cut-off events. For 1407792/1407792 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 56143 event pairs, 1681 based on Foata normal form. 9/9458 useless extension candidates. Maximal degree in co-relation 90088. Up to 9205 conditions per place. [2024-06-21 17:01:03,735 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 514 selfloop transitions, 49 changer transitions 0/566 dead transitions. [2024-06-21 17:01:03,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 566 transitions, 9894 flow [2024-06-21 17:01:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:01:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:01:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:01:03,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 17:01:03,736 INFO L175 Difference]: Start difference. First operand has 320 places, 537 transitions, 8372 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:01:03,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 566 transitions, 9894 flow [2024-06-21 17:01:08,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 566 transitions, 9738 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 17:01:08,027 INFO L231 Difference]: Finished difference. Result has 322 places, 544 transitions, 8442 flow [2024-06-21 17:01:08,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8216, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8442, PETRI_PLACES=322, PETRI_TRANSITIONS=544} [2024-06-21 17:01:08,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-21 17:01:08,028 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 544 transitions, 8442 flow [2024-06-21 17:01:08,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:08,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:08,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:08,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 17:01:08,028 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:01:08,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:08,029 INFO L85 PathProgramCache]: Analyzing trace with hash 435381643, now seen corresponding path program 2 times [2024-06-21 17:01:08,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:08,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752790241] [2024-06-21 17:01:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:08,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:08,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:08,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752790241] [2024-06-21 17:01:08,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752790241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:08,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:08,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:08,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51766206] [2024-06-21 17:01:08,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:08,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:08,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:08,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:08,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:08,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:01:08,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 544 transitions, 8442 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:08,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:08,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:01:08,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:10,599 INFO L124 PetriNetUnfolderBase]: 6225/9464 cut-off events. [2024-06-21 17:01:10,599 INFO L125 PetriNetUnfolderBase]: For 1411069/1411069 co-relation queries the response was YES. [2024-06-21 17:01:10,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91303 conditions, 9464 events. 6225/9464 cut-off events. For 1411069/1411069 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 56167 event pairs, 1682 based on Foata normal form. 2/9465 useless extension candidates. Maximal degree in co-relation 91142. Up to 9337 conditions per place. [2024-06-21 17:01:10,747 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 512 selfloop transitions, 49 changer transitions 0/564 dead transitions. [2024-06-21 17:01:10,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 564 transitions, 9878 flow [2024-06-21 17:01:10,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:01:10,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:01:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:01:10,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 17:01:10,748 INFO L175 Difference]: Start difference. First operand has 322 places, 544 transitions, 8442 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:01:10,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 564 transitions, 9878 flow [2024-06-21 17:01:15,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 564 transitions, 9776 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 17:01:15,050 INFO L231 Difference]: Finished difference. Result has 325 places, 549 transitions, 8527 flow [2024-06-21 17:01:15,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8340, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8527, PETRI_PLACES=325, PETRI_TRANSITIONS=549} [2024-06-21 17:01:15,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-21 17:01:15,050 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 549 transitions, 8527 flow [2024-06-21 17:01:15,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:15,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:15,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:15,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 17:01:15,051 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:01:15,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:15,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1409148226, now seen corresponding path program 2 times [2024-06-21 17:01:15,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:15,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606445213] [2024-06-21 17:01:15,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:15,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:15,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:15,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606445213] [2024-06-21 17:01:15,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606445213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:15,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:15,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:01:15,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832757452] [2024-06-21 17:01:15,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:15,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:01:15,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:15,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:01:15,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:01:15,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:01:15,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 549 transitions, 8527 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:15,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:15,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:01:15,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:17,790 INFO L124 PetriNetUnfolderBase]: 6240/9487 cut-off events. [2024-06-21 17:01:17,791 INFO L125 PetriNetUnfolderBase]: For 1443832/1443834 co-relation queries the response was YES. [2024-06-21 17:01:17,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91677 conditions, 9487 events. 6240/9487 cut-off events. For 1443832/1443834 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 56341 event pairs, 1702 based on Foata normal form. 3/9489 useless extension candidates. Maximal degree in co-relation 91514. Up to 9219 conditions per place. [2024-06-21 17:01:17,942 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 508 selfloop transitions, 64 changer transitions 0/575 dead transitions. [2024-06-21 17:01:17,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 575 transitions, 10227 flow [2024-06-21 17:01:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:01:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:01:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:01:17,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 17:01:17,943 INFO L175 Difference]: Start difference. First operand has 325 places, 549 transitions, 8527 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:01:17,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 575 transitions, 10227 flow [2024-06-21 17:01:21,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 575 transitions, 10125 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 17:01:21,475 INFO L231 Difference]: Finished difference. Result has 329 places, 555 transitions, 8690 flow [2024-06-21 17:01:21,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8425, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8690, PETRI_PLACES=329, PETRI_TRANSITIONS=555} [2024-06-21 17:01:21,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 17:01:21,476 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 555 transitions, 8690 flow [2024-06-21 17:01:21,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:21,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:21,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:21,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 17:01:21,477 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:01:21,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:21,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1748278627, now seen corresponding path program 3 times [2024-06-21 17:01:21,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:21,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755780624] [2024-06-21 17:01:21,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:21,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:22,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:22,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755780624] [2024-06-21 17:01:22,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755780624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:22,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:22,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:22,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716864556] [2024-06-21 17:01:22,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:22,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:22,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:22,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:22,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:01:22,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 555 transitions, 8690 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:22,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:22,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:01:22,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:24,301 INFO L124 PetriNetUnfolderBase]: 6234/9479 cut-off events. [2024-06-21 17:01:24,301 INFO L125 PetriNetUnfolderBase]: For 1464613/1464615 co-relation queries the response was YES. [2024-06-21 17:01:24,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91934 conditions, 9479 events. 6234/9479 cut-off events. For 1464613/1464615 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 56257 event pairs, 1697 based on Foata normal form. 2/9480 useless extension candidates. Maximal degree in co-relation 91770. Up to 9353 conditions per place. [2024-06-21 17:01:24,421 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 515 selfloop transitions, 47 changer transitions 0/565 dead transitions. [2024-06-21 17:01:24,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 565 transitions, 9846 flow [2024-06-21 17:01:24,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:01:24,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:01:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 17:01:24,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-21 17:01:24,422 INFO L175 Difference]: Start difference. First operand has 329 places, 555 transitions, 8690 flow. Second operand 7 states and 115 transitions. [2024-06-21 17:01:24,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 565 transitions, 9846 flow [2024-06-21 17:01:27,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 565 transitions, 9663 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-21 17:01:27,766 INFO L231 Difference]: Finished difference. Result has 332 places, 555 transitions, 8609 flow [2024-06-21 17:01:27,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8507, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8609, PETRI_PLACES=332, PETRI_TRANSITIONS=555} [2024-06-21 17:01:27,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-21 17:01:27,767 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 555 transitions, 8609 flow [2024-06-21 17:01:27,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:27,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:27,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:27,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 17:01:27,776 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:01:27,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:27,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1401529666, now seen corresponding path program 3 times [2024-06-21 17:01:27,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:27,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270958781] [2024-06-21 17:01:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:27,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:28,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:28,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270958781] [2024-06-21 17:01:28,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270958781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:28,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:28,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:01:28,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320241036] [2024-06-21 17:01:28,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:28,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:01:28,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:28,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:01:28,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:01:28,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:01:28,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 555 transitions, 8609 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:28,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:28,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:01:28,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:30,651 INFO L124 PetriNetUnfolderBase]: 6249/9500 cut-off events. [2024-06-21 17:01:30,651 INFO L125 PetriNetUnfolderBase]: For 1492077/1492079 co-relation queries the response was YES. [2024-06-21 17:01:30,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91973 conditions, 9500 events. 6249/9500 cut-off events. For 1492077/1492079 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 56402 event pairs, 1699 based on Foata normal form. 3/9502 useless extension candidates. Maximal degree in co-relation 91807. Up to 9224 conditions per place. [2024-06-21 17:01:30,790 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 515 selfloop transitions, 62 changer transitions 0/580 dead transitions. [2024-06-21 17:01:30,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 580 transitions, 10243 flow [2024-06-21 17:01:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:01:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:01:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:01:30,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 17:01:30,792 INFO L175 Difference]: Start difference. First operand has 332 places, 555 transitions, 8609 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:01:30,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 580 transitions, 10243 flow [2024-06-21 17:01:34,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 580 transitions, 10097 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:01:34,113 INFO L231 Difference]: Finished difference. Result has 333 places, 558 transitions, 8631 flow [2024-06-21 17:01:34,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8463, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8631, PETRI_PLACES=333, PETRI_TRANSITIONS=558} [2024-06-21 17:01:34,114 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 17:01:34,114 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 558 transitions, 8631 flow [2024-06-21 17:01:34,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:34,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:34,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:34,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 17:01:34,115 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:01:34,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:34,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2022454282, now seen corresponding path program 4 times [2024-06-21 17:01:34,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:34,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310701993] [2024-06-21 17:01:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:34,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:34,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:34,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310701993] [2024-06-21 17:01:34,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310701993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:34,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:34,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:01:34,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946802207] [2024-06-21 17:01:34,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:34,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:01:34,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:34,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:01:34,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:01:34,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:01:34,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 558 transitions, 8631 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:34,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:34,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:01:34,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:36,937 INFO L124 PetriNetUnfolderBase]: 6240/9488 cut-off events. [2024-06-21 17:01:36,938 INFO L125 PetriNetUnfolderBase]: For 1508913/1508915 co-relation queries the response was YES. [2024-06-21 17:01:37,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92024 conditions, 9488 events. 6240/9488 cut-off events. For 1508913/1508915 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 56374 event pairs, 1699 based on Foata normal form. 3/9490 useless extension candidates. Maximal degree in co-relation 91857. Up to 9220 conditions per place. [2024-06-21 17:01:37,075 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 512 selfloop transitions, 64 changer transitions 0/579 dead transitions. [2024-06-21 17:01:37,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 579 transitions, 10037 flow [2024-06-21 17:01:37,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:01:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:01:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:01:37,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 17:01:37,076 INFO L175 Difference]: Start difference. First operand has 333 places, 558 transitions, 8631 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:01:37,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 579 transitions, 10037 flow [2024-06-21 17:01:40,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 579 transitions, 9888 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:01:40,657 INFO L231 Difference]: Finished difference. Result has 336 places, 558 transitions, 8616 flow [2024-06-21 17:01:40,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8482, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8616, PETRI_PLACES=336, PETRI_TRANSITIONS=558} [2024-06-21 17:01:40,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-21 17:01:40,658 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 558 transitions, 8616 flow [2024-06-21 17:01:40,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:40,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:40,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:40,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 17:01:40,659 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:01:40,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:40,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1379598790, now seen corresponding path program 1 times [2024-06-21 17:01:40,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:40,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882074706] [2024-06-21 17:01:40,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:40,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:41,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:41,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882074706] [2024-06-21 17:01:41,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882074706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:41,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:41,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:01:41,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663553172] [2024-06-21 17:01:41,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:41,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:01:41,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:41,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:01:41,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:01:41,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:01:41,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 558 transitions, 8616 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:41,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:41,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:01:41,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:43,768 INFO L124 PetriNetUnfolderBase]: 6254/9565 cut-off events. [2024-06-21 17:01:43,768 INFO L125 PetriNetUnfolderBase]: For 1674643/1674651 co-relation queries the response was YES. [2024-06-21 17:01:43,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94605 conditions, 9565 events. 6254/9565 cut-off events. For 1674643/1674651 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 57584 event pairs, 1129 based on Foata normal form. 30/9594 useless extension candidates. Maximal degree in co-relation 94437. Up to 6291 conditions per place. [2024-06-21 17:01:43,921 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 383 selfloop transitions, 199 changer transitions 0/611 dead transitions. [2024-06-21 17:01:43,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 611 transitions, 10415 flow [2024-06-21 17:01:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:01:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:01:43,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 17:01:43,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-21 17:01:43,922 INFO L175 Difference]: Start difference. First operand has 336 places, 558 transitions, 8616 flow. Second operand 9 states and 190 transitions. [2024-06-21 17:01:43,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 611 transitions, 10415 flow [2024-06-21 17:01:47,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 611 transitions, 10256 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 17:01:47,232 INFO L231 Difference]: Finished difference. Result has 337 places, 563 transitions, 9067 flow [2024-06-21 17:01:47,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8457, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9067, PETRI_PLACES=337, PETRI_TRANSITIONS=563} [2024-06-21 17:01:47,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-21 17:01:47,233 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 563 transitions, 9067 flow [2024-06-21 17:01:47,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:47,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:47,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:47,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 17:01:47,234 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:01:47,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1649334266, now seen corresponding path program 1 times [2024-06-21 17:01:47,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:47,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712641758] [2024-06-21 17:01:47,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:47,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:48,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:48,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712641758] [2024-06-21 17:01:48,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712641758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:48,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:48,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:01:48,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739382056] [2024-06-21 17:01:48,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:48,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:01:48,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:48,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:01:48,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:01:48,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:01:48,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 563 transitions, 9067 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:48,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:48,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:01:48,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:50,400 INFO L124 PetriNetUnfolderBase]: 6410/9738 cut-off events. [2024-06-21 17:01:50,400 INFO L125 PetriNetUnfolderBase]: For 1643458/1643466 co-relation queries the response was YES. [2024-06-21 17:01:50,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97719 conditions, 9738 events. 6410/9738 cut-off events. For 1643458/1643466 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 58149 event pairs, 1378 based on Foata normal form. 12/9749 useless extension candidates. Maximal degree in co-relation 97550. Up to 7854 conditions per place. [2024-06-21 17:01:50,550 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 400 selfloop transitions, 211 changer transitions 0/614 dead transitions. [2024-06-21 17:01:50,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 614 transitions, 11229 flow [2024-06-21 17:01:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:01:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:01:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-21 17:01:50,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-21 17:01:50,552 INFO L175 Difference]: Start difference. First operand has 337 places, 563 transitions, 9067 flow. Second operand 11 states and 208 transitions. [2024-06-21 17:01:50,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 614 transitions, 11229 flow [2024-06-21 17:01:54,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 614 transitions, 10959 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 17:01:54,945 INFO L231 Difference]: Finished difference. Result has 343 places, 572 transitions, 9408 flow [2024-06-21 17:01:54,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8797, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9408, PETRI_PLACES=343, PETRI_TRANSITIONS=572} [2024-06-21 17:01:54,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-21 17:01:54,946 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 572 transitions, 9408 flow [2024-06-21 17:01:54,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:54,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:54,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:54,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 17:01:54,946 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:01:54,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:54,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1649333956, now seen corresponding path program 2 times [2024-06-21 17:01:54,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:54,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825827573] [2024-06-21 17:01:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:54,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:55,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:55,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825827573] [2024-06-21 17:01:55,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825827573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:55,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:55,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:01:55,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262142278] [2024-06-21 17:01:55,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:55,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:01:55,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:55,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:01:55,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:01:55,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:01:55,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 572 transitions, 9408 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:55,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:55,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:01:55,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:58,497 INFO L124 PetriNetUnfolderBase]: 6388/9760 cut-off events. [2024-06-21 17:01:58,497 INFO L125 PetriNetUnfolderBase]: For 1772855/1772863 co-relation queries the response was YES. [2024-06-21 17:01:58,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100114 conditions, 9760 events. 6388/9760 cut-off events. For 1772855/1772863 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 58935 event pairs, 1327 based on Foata normal form. 30/9789 useless extension candidates. Maximal degree in co-relation 99943. Up to 8112 conditions per place. [2024-06-21 17:01:58,656 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 404 selfloop transitions, 182 changer transitions 0/617 dead transitions. [2024-06-21 17:01:58,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 617 transitions, 10912 flow [2024-06-21 17:01:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:01:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:01:58,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 17:01:58,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-21 17:01:58,659 INFO L175 Difference]: Start difference. First operand has 343 places, 572 transitions, 9408 flow. Second operand 10 states and 198 transitions. [2024-06-21 17:01:58,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 617 transitions, 10912 flow [2024-06-21 17:02:03,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 617 transitions, 10540 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 17:02:03,460 INFO L231 Difference]: Finished difference. Result has 346 places, 576 transitions, 9555 flow [2024-06-21 17:02:03,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9036, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9555, PETRI_PLACES=346, PETRI_TRANSITIONS=576} [2024-06-21 17:02:03,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-21 17:02:03,477 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 576 transitions, 9555 flow [2024-06-21 17:02:03,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:03,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:03,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:03,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 17:02:03,477 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:02:03,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:03,478 INFO L85 PathProgramCache]: Analyzing trace with hash -831743388, now seen corresponding path program 1 times [2024-06-21 17:02:03,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:03,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739840056] [2024-06-21 17:02:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:03,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:04,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:04,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739840056] [2024-06-21 17:02:04,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739840056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:04,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:04,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:02:04,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643879758] [2024-06-21 17:02:04,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:04,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:02:04,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:04,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:02:04,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:02:04,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:02:04,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 576 transitions, 9555 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:04,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:04,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:02:04,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:06,911 INFO L124 PetriNetUnfolderBase]: 6750/10221 cut-off events. [2024-06-21 17:02:06,912 INFO L125 PetriNetUnfolderBase]: For 1890744/1890752 co-relation queries the response was YES. [2024-06-21 17:02:07,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107410 conditions, 10221 events. 6750/10221 cut-off events. For 1890744/1890752 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 61162 event pairs, 1449 based on Foata normal form. 20/10240 useless extension candidates. Maximal degree in co-relation 107237. Up to 8280 conditions per place. [2024-06-21 17:02:07,093 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 450 selfloop transitions, 186 changer transitions 0/639 dead transitions. [2024-06-21 17:02:07,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 639 transitions, 12005 flow [2024-06-21 17:02:07,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:02:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:02:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 17:02:07,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-21 17:02:07,095 INFO L175 Difference]: Start difference. First operand has 346 places, 576 transitions, 9555 flow. Second operand 9 states and 179 transitions. [2024-06-21 17:02:07,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 639 transitions, 12005 flow [2024-06-21 17:02:12,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 639 transitions, 11594 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 17:02:12,184 INFO L231 Difference]: Finished difference. Result has 349 places, 596 transitions, 10029 flow [2024-06-21 17:02:12,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9144, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10029, PETRI_PLACES=349, PETRI_TRANSITIONS=596} [2024-06-21 17:02:12,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-21 17:02:12,184 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 596 transitions, 10029 flow [2024-06-21 17:02:12,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:12,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:12,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:12,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 17:02:12,185 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:02:12,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:12,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1261148782, now seen corresponding path program 1 times [2024-06-21 17:02:12,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:12,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251505223] [2024-06-21 17:02:12,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:12,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:12,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:12,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251505223] [2024-06-21 17:02:12,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251505223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:12,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:12,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:02:12,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136758115] [2024-06-21 17:02:12,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:12,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:02:12,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:12,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:02:12,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:02:12,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:02:12,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 596 transitions, 10029 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:12,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:12,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:02:12,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:15,621 INFO L124 PetriNetUnfolderBase]: 6804/10305 cut-off events. [2024-06-21 17:02:15,621 INFO L125 PetriNetUnfolderBase]: For 1920691/1920693 co-relation queries the response was YES. [2024-06-21 17:02:15,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110660 conditions, 10305 events. 6804/10305 cut-off events. For 1920691/1920693 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 61771 event pairs, 1453 based on Foata normal form. 8/10312 useless extension candidates. Maximal degree in co-relation 110484. Up to 8809 conditions per place. [2024-06-21 17:02:15,864 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 460 selfloop transitions, 175 changer transitions 0/638 dead transitions. [2024-06-21 17:02:15,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 638 transitions, 12138 flow [2024-06-21 17:02:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:15,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 17:02:15,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 17:02:15,865 INFO L175 Difference]: Start difference. First operand has 349 places, 596 transitions, 10029 flow. Second operand 8 states and 151 transitions. [2024-06-21 17:02:15,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 638 transitions, 12138 flow [2024-06-21 17:02:19,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 638 transitions, 11963 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-06-21 17:02:19,504 INFO L231 Difference]: Finished difference. Result has 355 places, 610 transitions, 10578 flow [2024-06-21 17:02:19,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9854, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10578, PETRI_PLACES=355, PETRI_TRANSITIONS=610} [2024-06-21 17:02:19,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-21 17:02:19,505 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 610 transitions, 10578 flow [2024-06-21 17:02:19,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:19,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:19,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:19,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 17:02:19,505 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:02:19,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:19,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1944676474, now seen corresponding path program 2 times [2024-06-21 17:02:19,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:19,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262626860] [2024-06-21 17:02:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:19,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:20,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:20,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262626860] [2024-06-21 17:02:20,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262626860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:20,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:20,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:02:20,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774401398] [2024-06-21 17:02:20,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:20,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:02:20,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:20,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:02:20,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:02:20,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:02:20,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 610 transitions, 10578 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:20,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:20,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:02:20,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:23,122 INFO L124 PetriNetUnfolderBase]: 6814/10315 cut-off events. [2024-06-21 17:02:23,123 INFO L125 PetriNetUnfolderBase]: For 1935508/1935510 co-relation queries the response was YES. [2024-06-21 17:02:23,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111621 conditions, 10315 events. 6814/10315 cut-off events. For 1935508/1935510 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 61679 event pairs, 1494 based on Foata normal form. 4/10318 useless extension candidates. Maximal degree in co-relation 111441. Up to 8815 conditions per place. [2024-06-21 17:02:23,293 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 441 selfloop transitions, 191 changer transitions 0/635 dead transitions. [2024-06-21 17:02:23,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 635 transitions, 12623 flow [2024-06-21 17:02:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:23,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:02:23,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 17:02:23,295 INFO L175 Difference]: Start difference. First operand has 355 places, 610 transitions, 10578 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:02:23,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 635 transitions, 12623 flow [2024-06-21 17:02:29,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 635 transitions, 12385 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 17:02:29,074 INFO L231 Difference]: Finished difference. Result has 359 places, 615 transitions, 10842 flow [2024-06-21 17:02:29,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10346, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10842, PETRI_PLACES=359, PETRI_TRANSITIONS=615} [2024-06-21 17:02:29,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-21 17:02:29,075 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 615 transitions, 10842 flow [2024-06-21 17:02:29,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:29,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:29,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:29,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 17:02:29,076 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:02:29,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:29,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1944913624, now seen corresponding path program 3 times [2024-06-21 17:02:29,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:29,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227308008] [2024-06-21 17:02:29,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:29,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:29,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:29,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227308008] [2024-06-21 17:02:29,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227308008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:29,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:29,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:02:29,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38974176] [2024-06-21 17:02:29,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:29,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:02:29,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:29,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:02:29,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:02:29,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:02:29,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 615 transitions, 10842 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:29,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:29,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:02:29,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:32,708 INFO L124 PetriNetUnfolderBase]: 6808/10307 cut-off events. [2024-06-21 17:02:32,708 INFO L125 PetriNetUnfolderBase]: For 1966460/1966462 co-relation queries the response was YES. [2024-06-21 17:02:32,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111742 conditions, 10307 events. 6808/10307 cut-off events. For 1966460/1966462 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 61627 event pairs, 1490 based on Foata normal form. 4/10310 useless extension candidates. Maximal degree in co-relation 111561. Up to 8812 conditions per place. [2024-06-21 17:02:32,852 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 432 selfloop transitions, 200 changer transitions 0/635 dead transitions. [2024-06-21 17:02:32,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 635 transitions, 12584 flow [2024-06-21 17:02:32,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:02:32,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 17:02:32,854 INFO L175 Difference]: Start difference. First operand has 359 places, 615 transitions, 10842 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:02:32,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 635 transitions, 12584 flow [2024-06-21 17:02:38,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 635 transitions, 12228 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 17:02:38,061 INFO L231 Difference]: Finished difference. Result has 363 places, 615 transitions, 10896 flow [2024-06-21 17:02:38,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10486, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10896, PETRI_PLACES=363, PETRI_TRANSITIONS=615} [2024-06-21 17:02:38,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-21 17:02:38,062 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 615 transitions, 10896 flow [2024-06-21 17:02:38,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:38,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:38,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:38,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 17:02:38,062 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:02:38,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:38,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1944922118, now seen corresponding path program 2 times [2024-06-21 17:02:38,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:38,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851136500] [2024-06-21 17:02:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:38,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:38,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:38,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851136500] [2024-06-21 17:02:38,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851136500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:38,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:38,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:02:38,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535784673] [2024-06-21 17:02:38,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:38,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:02:38,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:38,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:02:38,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:02:38,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:02:38,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 615 transitions, 10896 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:38,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:38,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:02:38,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:41,819 INFO L124 PetriNetUnfolderBase]: 7126/10748 cut-off events. [2024-06-21 17:02:41,819 INFO L125 PetriNetUnfolderBase]: For 2221915/2221917 co-relation queries the response was YES. [2024-06-21 17:02:41,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119516 conditions, 10748 events. 7126/10748 cut-off events. For 2221915/2221917 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 64363 event pairs, 1502 based on Foata normal form. 14/10761 useless extension candidates. Maximal degree in co-relation 119334. Up to 8458 conditions per place. [2024-06-21 17:02:42,003 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 449 selfloop transitions, 213 changer transitions 0/665 dead transitions. [2024-06-21 17:02:42,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 665 transitions, 13557 flow [2024-06-21 17:02:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:02:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:02:42,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 17:02:42,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 17:02:42,004 INFO L175 Difference]: Start difference. First operand has 363 places, 615 transitions, 10896 flow. Second operand 9 states and 174 transitions. [2024-06-21 17:02:42,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 665 transitions, 13557 flow [2024-06-21 17:02:45,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 665 transitions, 13189 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 17:02:45,626 INFO L231 Difference]: Finished difference. Result has 367 places, 628 transitions, 11301 flow [2024-06-21 17:02:45,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10528, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11301, PETRI_PLACES=367, PETRI_TRANSITIONS=628} [2024-06-21 17:02:45,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-21 17:02:45,627 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 628 transitions, 11301 flow [2024-06-21 17:02:45,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:45,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:45,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:45,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 17:02:45,628 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:02:45,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:45,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1944909656, now seen corresponding path program 2 times [2024-06-21 17:02:45,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:45,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976442220] [2024-06-21 17:02:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:45,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:46,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:46,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976442220] [2024-06-21 17:02:46,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976442220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:46,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:46,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:02:46,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989279694] [2024-06-21 17:02:46,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:46,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:02:46,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:46,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:02:46,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:02:46,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:02:46,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 628 transitions, 11301 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:46,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:46,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:02:46,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:49,240 INFO L124 PetriNetUnfolderBase]: 7152/10785 cut-off events. [2024-06-21 17:02:49,240 INFO L125 PetriNetUnfolderBase]: For 2235176/2235178 co-relation queries the response was YES. [2024-06-21 17:02:49,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121163 conditions, 10785 events. 7152/10785 cut-off events. For 2235176/2235178 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 64557 event pairs, 1546 based on Foata normal form. 6/10790 useless extension candidates. Maximal degree in co-relation 120979. Up to 9272 conditions per place. [2024-06-21 17:02:49,558 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 447 selfloop transitions, 206 changer transitions 0/656 dead transitions. [2024-06-21 17:02:49,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 656 transitions, 13209 flow [2024-06-21 17:02:49,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:02:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:02:49,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:02:49,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 17:02:49,560 INFO L175 Difference]: Start difference. First operand has 367 places, 628 transitions, 11301 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:02:49,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 656 transitions, 13209 flow [2024-06-21 17:02:53,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 656 transitions, 12770 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-21 17:02:53,441 INFO L231 Difference]: Finished difference. Result has 371 places, 633 transitions, 11390 flow [2024-06-21 17:02:53,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10862, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11390, PETRI_PLACES=371, PETRI_TRANSITIONS=633} [2024-06-21 17:02:53,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-21 17:02:53,442 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 633 transitions, 11390 flow [2024-06-21 17:02:53,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:53,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:53,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:53,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 17:02:53,443 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:02:53,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:53,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1944910028, now seen corresponding path program 3 times [2024-06-21 17:02:53,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:53,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081364922] [2024-06-21 17:02:53,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:53,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:54,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:54,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081364922] [2024-06-21 17:02:54,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081364922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:54,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:54,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:02:54,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986863488] [2024-06-21 17:02:54,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:54,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:02:54,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:54,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:02:54,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:02:54,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:02:54,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 633 transitions, 11390 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:54,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:54,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:02:54,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:57,199 INFO L124 PetriNetUnfolderBase]: 7230/10896 cut-off events. [2024-06-21 17:02:57,199 INFO L125 PetriNetUnfolderBase]: For 2318383/2318385 co-relation queries the response was YES. [2024-06-21 17:02:57,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120857 conditions, 10896 events. 7230/10896 cut-off events. For 2318383/2318385 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 65223 event pairs, 1530 based on Foata normal form. 14/10909 useless extension candidates. Maximal degree in co-relation 120672. Up to 8548 conditions per place. [2024-06-21 17:02:57,371 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 456 selfloop transitions, 217 changer transitions 0/676 dead transitions. [2024-06-21 17:02:57,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 676 transitions, 13674 flow [2024-06-21 17:02:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:02:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:02:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 17:02:57,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 17:02:57,373 INFO L175 Difference]: Start difference. First operand has 371 places, 633 transitions, 11390 flow. Second operand 9 states and 176 transitions. [2024-06-21 17:02:57,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 676 transitions, 13674 flow [2024-06-21 17:03:02,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 676 transitions, 13188 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 17:03:02,700 INFO L231 Difference]: Finished difference. Result has 373 places, 638 transitions, 11436 flow [2024-06-21 17:03:02,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10904, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11436, PETRI_PLACES=373, PETRI_TRANSITIONS=638} [2024-06-21 17:03:02,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-21 17:03:02,700 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 638 transitions, 11436 flow [2024-06-21 17:03:02,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:02,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:02,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:02,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 17:03:02,701 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:03:02,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:02,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1944564068, now seen corresponding path program 4 times [2024-06-21 17:03:02,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:02,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516764231] [2024-06-21 17:03:02,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:02,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:03,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:03,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516764231] [2024-06-21 17:03:03,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516764231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:03,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:03,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:03:03,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654684474] [2024-06-21 17:03:03,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:03,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:03:03,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:03,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:03:03,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:03:03,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:03:03,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 638 transitions, 11436 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:03,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:03,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:03:03,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:06,628 INFO L124 PetriNetUnfolderBase]: 7194/10848 cut-off events. [2024-06-21 17:03:06,628 INFO L125 PetriNetUnfolderBase]: For 2291255/2291257 co-relation queries the response was YES. [2024-06-21 17:03:06,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119902 conditions, 10848 events. 7194/10848 cut-off events. For 2291255/2291257 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 64919 event pairs, 1528 based on Foata normal form. 14/10861 useless extension candidates. Maximal degree in co-relation 119716. Up to 8529 conditions per place. [2024-06-21 17:03:06,790 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 463 selfloop transitions, 211 changer transitions 0/677 dead transitions. [2024-06-21 17:03:06,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 677 transitions, 13665 flow [2024-06-21 17:03:06,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:03:06,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:03:06,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 17:03:06,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 17:03:06,792 INFO L175 Difference]: Start difference. First operand has 373 places, 638 transitions, 11436 flow. Second operand 9 states and 177 transitions. [2024-06-21 17:03:06,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 677 transitions, 13665 flow [2024-06-21 17:03:12,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 677 transitions, 13361 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 17:03:12,063 INFO L231 Difference]: Finished difference. Result has 377 places, 640 transitions, 11614 flow [2024-06-21 17:03:12,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11132, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11614, PETRI_PLACES=377, PETRI_TRANSITIONS=640} [2024-06-21 17:03:12,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-21 17:03:12,064 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 640 transitions, 11614 flow [2024-06-21 17:03:12,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:12,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:12,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:12,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 17:03:12,065 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:03:12,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:12,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1944563696, now seen corresponding path program 3 times [2024-06-21 17:03:12,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:12,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852272909] [2024-06-21 17:03:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:12,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:12,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:12,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852272909] [2024-06-21 17:03:12,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852272909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:12,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:12,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:03:12,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264070155] [2024-06-21 17:03:12,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:12,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:03:12,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:12,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:03:12,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:03:13,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:03:13,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 640 transitions, 11614 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:13,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:13,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:03:13,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:15,977 INFO L124 PetriNetUnfolderBase]: 7214/10876 cut-off events. [2024-06-21 17:03:15,977 INFO L125 PetriNetUnfolderBase]: For 2284282/2284284 co-relation queries the response was YES. [2024-06-21 17:03:16,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120378 conditions, 10876 events. 7214/10876 cut-off events. For 2284282/2284284 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 65099 event pairs, 1549 based on Foata normal form. 6/10881 useless extension candidates. Maximal degree in co-relation 120191. Up to 9367 conditions per place. [2024-06-21 17:03:16,155 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 467 selfloop transitions, 198 changer transitions 0/668 dead transitions. [2024-06-21 17:03:16,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 668 transitions, 13568 flow [2024-06-21 17:03:16,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:03:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:03:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:03:16,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 17:03:16,156 INFO L175 Difference]: Start difference. First operand has 377 places, 640 transitions, 11614 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:03:16,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 668 transitions, 13568 flow [2024-06-21 17:03:20,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 668 transitions, 13173 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 17:03:20,750 INFO L231 Difference]: Finished difference. Result has 380 places, 645 transitions, 11741 flow [2024-06-21 17:03:20,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11219, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11741, PETRI_PLACES=380, PETRI_TRANSITIONS=645} [2024-06-21 17:03:20,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-21 17:03:20,751 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 645 transitions, 11741 flow [2024-06-21 17:03:20,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:20,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:20,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:20,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 17:03:20,752 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:03:20,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1944553466, now seen corresponding path program 4 times [2024-06-21 17:03:20,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:20,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812480792] [2024-06-21 17:03:20,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:20,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:21,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:21,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812480792] [2024-06-21 17:03:21,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812480792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:21,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:21,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:03:21,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895155609] [2024-06-21 17:03:21,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:21,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:03:21,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:21,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:03:21,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:03:21,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:03:21,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 645 transitions, 11741 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:21,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:21,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:03:21,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:24,708 INFO L124 PetriNetUnfolderBase]: 7234/10904 cut-off events. [2024-06-21 17:03:24,709 INFO L125 PetriNetUnfolderBase]: For 2328927/2328929 co-relation queries the response was YES. [2024-06-21 17:03:24,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120645 conditions, 10904 events. 7234/10904 cut-off events. For 2328927/2328929 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 65273 event pairs, 1536 based on Foata normal form. 6/10909 useless extension candidates. Maximal degree in co-relation 120457. Up to 9333 conditions per place. [2024-06-21 17:03:24,871 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 459 selfloop transitions, 213 changer transitions 0/675 dead transitions. [2024-06-21 17:03:24,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 675 transitions, 13733 flow [2024-06-21 17:03:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:03:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:03:24,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 17:03:24,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:03:24,873 INFO L175 Difference]: Start difference. First operand has 380 places, 645 transitions, 11741 flow. Second operand 10 states and 180 transitions. [2024-06-21 17:03:24,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 675 transitions, 13733 flow [2024-06-21 17:03:29,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 675 transitions, 13322 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 17:03:29,893 INFO L231 Difference]: Finished difference. Result has 384 places, 650 transitions, 11898 flow [2024-06-21 17:03:29,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11330, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11898, PETRI_PLACES=384, PETRI_TRANSITIONS=650} [2024-06-21 17:03:29,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-21 17:03:29,894 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 650 transitions, 11898 flow [2024-06-21 17:03:29,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:29,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:29,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:29,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 17:03:29,894 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:03:29,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:29,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1944553156, now seen corresponding path program 3 times [2024-06-21 17:03:29,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:29,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867781923] [2024-06-21 17:03:29,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:29,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat