./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:54:06,071 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:54:06,145 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:54:06,148 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:54:06,149 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:54:06,176 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:54:06,182 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:54:06,183 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:54:06,183 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:54:06,184 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:54:06,184 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:54:06,184 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:54:06,185 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:54:06,185 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:54:06,185 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:54:06,186 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:54:06,188 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:54:06,188 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:54:06,188 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:54:06,188 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:54:06,189 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:54:06,189 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:54:06,189 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:54:06,190 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:54:06,191 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:54:06,192 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:54:06,192 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:54:06,192 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:54:06,192 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:54:06,193 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:54:06,193 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:54:06,193 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:54:06,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:54:06,194 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:54:06,194 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:54:06,194 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:54:06,194 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:54:06,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:54:06,195 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:54:06,195 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:54:06,195 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:54:06,196 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:54:06,196 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:54:06,196 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:54:06,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:54:06,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:54:06,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:54:06,454 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:54:06,454 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:54:06,455 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-27 20:54:06,646 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:54:06,646 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:54:06,647 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 20:54:07,700 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:54:07,951 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:54:07,959 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 20:54:07,971 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2fe7f06b/1ceeb734da2945cda80ef1556f337a54/FLAG320a2efea [2024-06-27 20:54:07,982 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2fe7f06b/1ceeb734da2945cda80ef1556f337a54 [2024-06-27 20:54:07,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:54:07,983 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:54:07,984 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:54:07,984 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:54:07,988 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:54:07,988 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:54:06" (1/2) ... [2024-06-27 20:54:07,989 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@383bf81d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:54:07, skipping insertion in model container [2024-06-27 20:54:07,989 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:54:06" (1/2) ... [2024-06-27 20:54:07,990 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c1836db and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:54:07, skipping insertion in model container [2024-06-27 20:54:07,990 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:54:07" (2/2) ... [2024-06-27 20:54:07,991 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@383bf81d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:54:07, skipping insertion in model container [2024-06-27 20:54:07,991 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:54:07" (2/2) ... [2024-06-27 20:54:07,991 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:54:08,064 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:54:08,065 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 20:54:08,065 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 20:54:08,065 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 20:54:08,065 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:54:08,066 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-27 20:54:08,103 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:54:08,426 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:54:08,438 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:54:08,551 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:54:08,592 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:54:08,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:54:08 WrapperNode [2024-06-27 20:54:08,594 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:54:08,595 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:54:08,596 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:54:08,596 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:54:08,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:54:08" (1/1) ... [2024-06-27 20:54:08,630 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:54:08" (1/1) ... [2024-06-27 20:54:08,655 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-27 20:54:08,660 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:54:08,661 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:54:08,661 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:54:08,661 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:54:08,670 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:54:08" (1/1) ... [2024-06-27 20:54:08,670 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:54:08" (1/1) ... [2024-06-27 20:54:08,673 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:54:08" (1/1) ... [2024-06-27 20:54:08,703 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 20:54:08,703 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:54:08" (1/1) ... [2024-06-27 20:54:08,703 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:54:08" (1/1) ... [2024-06-27 20:54:08,725 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:54:08" (1/1) ... [2024-06-27 20:54:08,729 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:54:08" (1/1) ... [2024-06-27 20:54:08,730 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:54:08" (1/1) ... [2024-06-27 20:54:08,732 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:54:08" (1/1) ... [2024-06-27 20:54:08,735 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:54:08,735 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:54:08,735 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:54:08,735 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:54:08,736 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:54:08" (1/1) ... [2024-06-27 20:54:08,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:54:08,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:54:08,771 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 20:54:08,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 20:54:08,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:54:08,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:54:08,816 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:54:08,816 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:54:08,816 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:54:08,816 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:54:08,817 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:54:08,817 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:54:08,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:54:08,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:54:08,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:54:08,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:54:08,819 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:54:08,941 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:54:08,943 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:54:09,300 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:54:09,301 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:54:09,463 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:54:09,463 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:54:09,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:54:09 BoogieIcfgContainer [2024-06-27 20:54:09,464 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:54:09,466 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:54:09,466 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:54:09,469 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:54:09,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:54:06" (1/4) ... [2024-06-27 20:54:09,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1f7022 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:54:09, skipping insertion in model container [2024-06-27 20:54:09,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:54:07" (2/4) ... [2024-06-27 20:54:09,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1f7022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:54:09, skipping insertion in model container [2024-06-27 20:54:09,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:54:08" (3/4) ... [2024-06-27 20:54:09,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1f7022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:54:09, skipping insertion in model container [2024-06-27 20:54:09,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:54:09" (4/4) ... [2024-06-27 20:54:09,472 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 20:54:09,486 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:54:09,486 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:54:09,486 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:54:09,526 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:54:09,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 20:54:09,589 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 20:54:09,589 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:54:09,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:54:09,592 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 20:54:09,624 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 20:54:09,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:54:09,652 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;@17435fc1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:54:09,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:54:09,656 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:54:09,657 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 20:54:09,657 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:54:09,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:09,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:54:09,658 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)] === [2024-06-27 20:54:09,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:09,662 INFO L85 PathProgramCache]: Analyzing trace with hash 441899971, now seen corresponding path program 1 times [2024-06-27 20:54:09,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:09,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730369338] [2024-06-27 20:54:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:09,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:10,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:10,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730369338] [2024-06-27 20:54:10,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730369338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:10,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:10,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:54:10,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083311444] [2024-06-27 20:54:10,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:10,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:54:10,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:10,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:54:10,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:54:10,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 20:54:10,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:10,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:10,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 20:54:10,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:11,053 INFO L124 PetriNetUnfolderBase]: 1354/2038 cut-off events. [2024-06-27 20:54:11,054 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-27 20:54:11,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4150 conditions, 2038 events. 1354/2038 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9585 event pairs, 709 based on Foata normal form. 4/2007 useless extension candidates. Maximal degree in co-relation 4138. Up to 2016 conditions per place. [2024-06-27 20:54:11,069 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 20:54:11,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 181 flow [2024-06-27 20:54:11,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:54:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:54:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-27 20:54:11,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 20:54:11,081 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-27 20:54:11,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 181 flow [2024-06-27 20:54:11,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:54:11,087 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 20:54:11,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-27 20:54:11,091 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 20:54:11,091 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 20:54:11,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:11,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:11,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:11,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:54:11,092 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)] === [2024-06-27 20:54:11,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:11,093 INFO L85 PathProgramCache]: Analyzing trace with hash -535779076, now seen corresponding path program 1 times [2024-06-27 20:54:11,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:11,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691335845] [2024-06-27 20:54:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:11,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:11,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:11,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691335845] [2024-06-27 20:54:11,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691335845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:11,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:11,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:54:11,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564243614] [2024-06-27 20:54:11,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:11,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:54:11,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:11,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:54:11,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:54:11,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 20:54:11,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:11,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:11,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 20:54:11,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:11,927 INFO L124 PetriNetUnfolderBase]: 1363/2050 cut-off events. [2024-06-27 20:54:11,927 INFO L125 PetriNetUnfolderBase]: For 316/319 co-relation queries the response was YES. [2024-06-27 20:54:11,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4738 conditions, 2050 events. 1363/2050 cut-off events. For 316/319 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9433 event pairs, 772 based on Foata normal form. 8/2057 useless extension candidates. Maximal degree in co-relation 4726. Up to 2013 conditions per place. [2024-06-27 20:54:11,937 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 45 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-27 20:54:11,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 266 flow [2024-06-27 20:54:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:54:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:54:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-27 20:54:11,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 20:54:11,941 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 92 transitions. [2024-06-27 20:54:11,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 266 flow [2024-06-27 20:54:11,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:54:11,944 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 154 flow [2024-06-27 20:54:11,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-27 20:54:11,944 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-27 20:54:11,945 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 154 flow [2024-06-27 20:54:11,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:11,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:11,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:11,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:54:11,947 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)] === [2024-06-27 20:54:11,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:11,948 INFO L85 PathProgramCache]: Analyzing trace with hash 570718658, now seen corresponding path program 1 times [2024-06-27 20:54:11,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:11,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681686305] [2024-06-27 20:54:11,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:11,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:12,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:12,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681686305] [2024-06-27 20:54:12,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681686305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:12,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:12,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:54:12,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107201687] [2024-06-27 20:54:12,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:12,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:54:12,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:12,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:54:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:54:12,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:12,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:12,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:12,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:12,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:12,890 INFO L124 PetriNetUnfolderBase]: 1664/2484 cut-off events. [2024-06-27 20:54:12,891 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2024-06-27 20:54:12,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6476 conditions, 2484 events. 1664/2484 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11396 event pairs, 791 based on Foata normal form. 6/2490 useless extension candidates. Maximal degree in co-relation 6461. Up to 2418 conditions per place. [2024-06-27 20:54:12,901 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 62 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-27 20:54:12,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 407 flow [2024-06-27 20:54:12,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:54:12,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:54:12,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-27 20:54:12,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-27 20:54:12,903 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 154 flow. Second operand 5 states and 111 transitions. [2024-06-27 20:54:12,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 407 flow [2024-06-27 20:54:12,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 392 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 20:54:12,906 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 230 flow [2024-06-27 20:54:12,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2024-06-27 20:54:12,907 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-27 20:54:12,907 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 230 flow [2024-06-27 20:54:12,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:12,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:12,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:12,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:54:12,907 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)] === [2024-06-27 20:54:12,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:12,908 INFO L85 PathProgramCache]: Analyzing trace with hash 429293185, now seen corresponding path program 1 times [2024-06-27 20:54:12,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:12,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789369056] [2024-06-27 20:54:12,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:12,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:13,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:13,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789369056] [2024-06-27 20:54:13,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789369056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:13,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:13,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:54:13,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887476386] [2024-06-27 20:54:13,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:13,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:54:13,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:13,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:54:13,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:54:13,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:13,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:13,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:13,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:13,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:14,158 INFO L124 PetriNetUnfolderBase]: 1658/2475 cut-off events. [2024-06-27 20:54:14,158 INFO L125 PetriNetUnfolderBase]: For 2199/2199 co-relation queries the response was YES. [2024-06-27 20:54:14,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7118 conditions, 2475 events. 1658/2475 cut-off events. For 2199/2199 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11209 event pairs, 722 based on Foata normal form. 3/2478 useless extension candidates. Maximal degree in co-relation 7099. Up to 2418 conditions per place. [2024-06-27 20:54:14,178 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 69 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2024-06-27 20:54:14,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 507 flow [2024-06-27 20:54:14,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:54:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:54:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-27 20:54:14,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-27 20:54:14,183 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 230 flow. Second operand 6 states and 124 transitions. [2024-06-27 20:54:14,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 507 flow [2024-06-27 20:54:14,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 503 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 20:54:14,192 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 325 flow [2024-06-27 20:54:14,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2024-06-27 20:54:14,193 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-27 20:54:14,194 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 325 flow [2024-06-27 20:54:14,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:14,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:14,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:14,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:54:14,194 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)] === [2024-06-27 20:54:14,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:14,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1295155967, now seen corresponding path program 1 times [2024-06-27 20:54:14,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:14,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656509881] [2024-06-27 20:54:14,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:14,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:15,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:15,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656509881] [2024-06-27 20:54:15,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656509881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:15,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:15,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:54:15,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631566835] [2024-06-27 20:54:15,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:15,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:54:15,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:15,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:54:15,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:54:15,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:15,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 325 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:15,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:15,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:15,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:15,478 INFO L124 PetriNetUnfolderBase]: 1649/2460 cut-off events. [2024-06-27 20:54:15,478 INFO L125 PetriNetUnfolderBase]: For 3519/3519 co-relation queries the response was YES. [2024-06-27 20:54:15,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7736 conditions, 2460 events. 1649/2460 cut-off events. For 3519/3519 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11068 event pairs, 558 based on Foata normal form. 6/2466 useless extension candidates. Maximal degree in co-relation 7712. Up to 2373 conditions per place. [2024-06-27 20:54:15,493 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 73 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-06-27 20:54:15,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 92 transitions, 587 flow [2024-06-27 20:54:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:54:15,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:54:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 20:54:15,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49642857142857144 [2024-06-27 20:54:15,496 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 325 flow. Second operand 7 states and 139 transitions. [2024-06-27 20:54:15,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 92 transitions, 587 flow [2024-06-27 20:54:15,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 575 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 20:54:15,505 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 356 flow [2024-06-27 20:54:15,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=356, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-27 20:54:15,507 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-27 20:54:15,508 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 356 flow [2024-06-27 20:54:15,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:15,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:15,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:15,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:54:15,509 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)] === [2024-06-27 20:54:15,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:15,510 INFO L85 PathProgramCache]: Analyzing trace with hash 494709971, now seen corresponding path program 1 times [2024-06-27 20:54:15,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:15,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819870324] [2024-06-27 20:54:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:15,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:15,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:15,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819870324] [2024-06-27 20:54:15,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819870324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:15,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:15,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:54:15,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249895520] [2024-06-27 20:54:15,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:15,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:54:15,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:54:15,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:54:16,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:16,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 356 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:16,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:16,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:16,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:16,408 INFO L124 PetriNetUnfolderBase]: 1639/2447 cut-off events. [2024-06-27 20:54:16,408 INFO L125 PetriNetUnfolderBase]: For 4699/4701 co-relation queries the response was YES. [2024-06-27 20:54:16,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8162 conditions, 2447 events. 1639/2447 cut-off events. For 4699/4701 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11027 event pairs, 651 based on Foata normal form. 6/2453 useless extension candidates. Maximal degree in co-relation 8135. Up to 2407 conditions per place. [2024-06-27 20:54:16,424 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 61 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-06-27 20:54:16,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 74 transitions, 542 flow [2024-06-27 20:54:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:54:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:54:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-27 20:54:16,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-27 20:54:16,426 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 356 flow. Second operand 5 states and 83 transitions. [2024-06-27 20:54:16,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 74 transitions, 542 flow [2024-06-27 20:54:16,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 74 transitions, 507 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 20:54:16,432 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 369 flow [2024-06-27 20:54:16,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-27 20:54:16,434 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-27 20:54:16,434 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 369 flow [2024-06-27 20:54:16,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:16,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:16,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:16,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:54:16,435 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)] === [2024-06-27 20:54:16,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:16,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1174386298, now seen corresponding path program 1 times [2024-06-27 20:54:16,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:16,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464370367] [2024-06-27 20:54:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:16,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:17,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:17,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464370367] [2024-06-27 20:54:17,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464370367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:17,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:17,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:54:17,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001696267] [2024-06-27 20:54:17,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:17,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:54:17,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:17,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:54:17,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:54:17,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:17,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 369 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:17,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:17,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:17,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:17,563 INFO L124 PetriNetUnfolderBase]: 1689/2517 cut-off events. [2024-06-27 20:54:17,564 INFO L125 PetriNetUnfolderBase]: For 6225/6229 co-relation queries the response was YES. [2024-06-27 20:54:17,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8890 conditions, 2517 events. 1689/2517 cut-off events. For 6225/6229 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11471 event pairs, 628 based on Foata normal form. 9/2526 useless extension candidates. Maximal degree in co-relation 8861. Up to 2356 conditions per place. [2024-06-27 20:54:17,577 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 77 selfloop transitions, 24 changer transitions 0/104 dead transitions. [2024-06-27 20:54:17,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 104 transitions, 741 flow [2024-06-27 20:54:17,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:54:17,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:54:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:54:17,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-27 20:54:17,579 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 369 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:54:17,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 104 transitions, 741 flow [2024-06-27 20:54:17,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 717 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:54:17,585 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 444 flow [2024-06-27 20:54:17,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=444, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-27 20:54:17,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-06-27 20:54:17,585 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 444 flow [2024-06-27 20:54:17,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:17,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:17,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:17,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:54:17,586 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)] === [2024-06-27 20:54:17,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:17,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1502417574, now seen corresponding path program 2 times [2024-06-27 20:54:17,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:17,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061641922] [2024-06-27 20:54:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:17,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:18,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:18,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061641922] [2024-06-27 20:54:18,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061641922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:18,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:18,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:54:18,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175261585] [2024-06-27 20:54:18,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:18,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:54:18,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:18,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:54:18,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:54:18,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:18,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 444 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:18,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:18,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:18,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:18,963 INFO L124 PetriNetUnfolderBase]: 1741/2591 cut-off events. [2024-06-27 20:54:18,963 INFO L125 PetriNetUnfolderBase]: For 8531/8535 co-relation queries the response was YES. [2024-06-27 20:54:18,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9848 conditions, 2591 events. 1741/2591 cut-off events. For 8531/8535 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11811 event pairs, 646 based on Foata normal form. 9/2600 useless extension candidates. Maximal degree in co-relation 9818. Up to 2479 conditions per place. [2024-06-27 20:54:18,981 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 81 selfloop transitions, 21 changer transitions 0/105 dead transitions. [2024-06-27 20:54:18,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 105 transitions, 792 flow [2024-06-27 20:54:18,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:54:18,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:54:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:54:18,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-27 20:54:18,983 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 444 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:54:18,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 105 transitions, 792 flow [2024-06-27 20:54:18,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 761 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 20:54:18,994 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 515 flow [2024-06-27 20:54:18,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=515, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-27 20:54:18,996 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-27 20:54:18,996 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 515 flow [2024-06-27 20:54:18,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:18,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:18,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:18,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:54:18,997 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)] === [2024-06-27 20:54:18,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:18,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1502417388, now seen corresponding path program 1 times [2024-06-27 20:54:18,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:18,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449546926] [2024-06-27 20:54:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:18,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:19,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:19,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449546926] [2024-06-27 20:54:19,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449546926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:19,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:19,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:54:19,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639347377] [2024-06-27 20:54:19,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:19,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:54:19,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:19,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:54:19,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:54:19,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:19,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 515 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:19,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:19,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:19,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:20,144 INFO L124 PetriNetUnfolderBase]: 1763/2624 cut-off events. [2024-06-27 20:54:20,145 INFO L125 PetriNetUnfolderBase]: For 10371/10371 co-relation queries the response was YES. [2024-06-27 20:54:20,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10307 conditions, 2624 events. 1763/2624 cut-off events. For 10371/10371 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11928 event pairs, 616 based on Foata normal form. 4/2627 useless extension candidates. Maximal degree in co-relation 10275. Up to 2498 conditions per place. [2024-06-27 20:54:20,156 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 87 selfloop transitions, 22 changer transitions 0/112 dead transitions. [2024-06-27 20:54:20,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 112 transitions, 910 flow [2024-06-27 20:54:20,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:54:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:54:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 20:54:20,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-27 20:54:20,157 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 515 flow. Second operand 7 states and 121 transitions. [2024-06-27 20:54:20,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 112 transitions, 910 flow [2024-06-27 20:54:20,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 112 transitions, 851 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:54:20,165 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 608 flow [2024-06-27 20:54:20,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=608, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2024-06-27 20:54:20,166 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-27 20:54:20,166 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 608 flow [2024-06-27 20:54:20,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:20,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:20,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:20,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:54:20,167 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)] === [2024-06-27 20:54:20,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:20,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2105206030, now seen corresponding path program 2 times [2024-06-27 20:54:20,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:20,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498214678] [2024-06-27 20:54:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:20,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:20,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:20,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498214678] [2024-06-27 20:54:20,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498214678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:20,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:20,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:54:20,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566301643] [2024-06-27 20:54:20,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:20,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:54:20,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:20,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:54:20,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:54:20,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:20,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 608 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:20,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:20,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:20,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:21,179 INFO L124 PetriNetUnfolderBase]: 1785/2656 cut-off events. [2024-06-27 20:54:21,179 INFO L125 PetriNetUnfolderBase]: For 12814/12814 co-relation queries the response was YES. [2024-06-27 20:54:21,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11037 conditions, 2656 events. 1785/2656 cut-off events. For 12814/12814 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12027 event pairs, 614 based on Foata normal form. 4/2659 useless extension candidates. Maximal degree in co-relation 11002. Up to 2517 conditions per place. [2024-06-27 20:54:21,195 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 83 selfloop transitions, 25 changer transitions 0/111 dead transitions. [2024-06-27 20:54:21,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 948 flow [2024-06-27 20:54:21,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:54:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:54:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 20:54:21,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-27 20:54:21,196 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 608 flow. Second operand 6 states and 107 transitions. [2024-06-27 20:54:21,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 948 flow [2024-06-27 20:54:21,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 111 transitions, 914 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 20:54:21,209 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 683 flow [2024-06-27 20:54:21,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=683, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2024-06-27 20:54:21,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-27 20:54:21,210 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 683 flow [2024-06-27 20:54:21,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:21,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:21,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:21,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:54:21,210 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)] === [2024-06-27 20:54:21,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:21,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2105206216, now seen corresponding path program 3 times [2024-06-27 20:54:21,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:21,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440279349] [2024-06-27 20:54:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:21,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:21,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:21,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440279349] [2024-06-27 20:54:21,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440279349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:21,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:21,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:54:21,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281330839] [2024-06-27 20:54:21,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:21,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:54:21,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:21,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:54:21,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:54:21,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:21,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 683 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:21,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:21,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:21,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:22,329 INFO L124 PetriNetUnfolderBase]: 1771/2636 cut-off events. [2024-06-27 20:54:22,329 INFO L125 PetriNetUnfolderBase]: For 14876/14878 co-relation queries the response was YES. [2024-06-27 20:54:22,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11324 conditions, 2636 events. 1771/2636 cut-off events. For 14876/14878 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11957 event pairs, 640 based on Foata normal form. 7/2643 useless extension candidates. Maximal degree in co-relation 11286. Up to 2518 conditions per place. [2024-06-27 20:54:22,342 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 87 selfloop transitions, 25 changer transitions 0/115 dead transitions. [2024-06-27 20:54:22,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 115 transitions, 995 flow [2024-06-27 20:54:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:54:22,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:54:22,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 20:54:22,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:54:22,344 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 683 flow. Second operand 6 states and 110 transitions. [2024-06-27 20:54:22,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 115 transitions, 995 flow [2024-06-27 20:54:22,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 115 transitions, 939 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:54:22,358 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 694 flow [2024-06-27 20:54:22,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=694, PETRI_PLACES=84, PETRI_TRANSITIONS=88} [2024-06-27 20:54:22,359 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-27 20:54:22,359 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 694 flow [2024-06-27 20:54:22,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:22,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:22,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:22,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:54:22,360 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)] === [2024-06-27 20:54:22,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:22,360 INFO L85 PathProgramCache]: Analyzing trace with hash -224945392, now seen corresponding path program 3 times [2024-06-27 20:54:22,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:22,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404976318] [2024-06-27 20:54:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:22,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:22,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:22,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404976318] [2024-06-27 20:54:22,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404976318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:22,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:22,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:54:22,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558135743] [2024-06-27 20:54:22,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:22,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:54:22,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:22,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:54:22,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:54:22,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:22,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 88 transitions, 694 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:22,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:22,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:22,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:23,433 INFO L124 PetriNetUnfolderBase]: 1777/2646 cut-off events. [2024-06-27 20:54:23,433 INFO L125 PetriNetUnfolderBase]: For 14952/14954 co-relation queries the response was YES. [2024-06-27 20:54:23,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11364 conditions, 2646 events. 1777/2646 cut-off events. For 14952/14954 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11997 event pairs, 622 based on Foata normal form. 6/2652 useless extension candidates. Maximal degree in co-relation 11326. Up to 2587 conditions per place. [2024-06-27 20:54:23,448 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 91 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2024-06-27 20:54:23,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 110 transitions, 994 flow [2024-06-27 20:54:23,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:54:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:54:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-27 20:54:23,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-27 20:54:23,450 INFO L175 Difference]: Start difference. First operand has 84 places, 88 transitions, 694 flow. Second operand 6 states and 98 transitions. [2024-06-27 20:54:23,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 110 transitions, 994 flow [2024-06-27 20:54:23,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 110 transitions, 933 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:54:23,465 INFO L231 Difference]: Finished difference. Result has 86 places, 94 transitions, 731 flow [2024-06-27 20:54:23,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=731, PETRI_PLACES=86, PETRI_TRANSITIONS=94} [2024-06-27 20:54:23,465 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-27 20:54:23,465 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 94 transitions, 731 flow [2024-06-27 20:54:23,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:23,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:23,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:23,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:54:23,466 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)] === [2024-06-27 20:54:23,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2104959952, now seen corresponding path program 1 times [2024-06-27 20:54:23,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:23,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619966138] [2024-06-27 20:54:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:23,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:24,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:24,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619966138] [2024-06-27 20:54:24,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619966138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:24,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:24,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:24,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939514759] [2024-06-27 20:54:24,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:24,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:24,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:24,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:24,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:24,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:24,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 94 transitions, 731 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:24,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:24,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:24,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:24,841 INFO L124 PetriNetUnfolderBase]: 1769/2633 cut-off events. [2024-06-27 20:54:24,841 INFO L125 PetriNetUnfolderBase]: For 16917/16921 co-relation queries the response was YES. [2024-06-27 20:54:24,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11590 conditions, 2633 events. 1769/2633 cut-off events. For 16917/16921 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11936 event pairs, 599 based on Foata normal form. 8/2641 useless extension candidates. Maximal degree in co-relation 11550. Up to 2575 conditions per place. [2024-06-27 20:54:24,855 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 95 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2024-06-27 20:54:24,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 112 transitions, 1007 flow [2024-06-27 20:54:24,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:54:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:54:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 20:54:24,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-27 20:54:24,857 INFO L175 Difference]: Start difference. First operand has 86 places, 94 transitions, 731 flow. Second operand 6 states and 97 transitions. [2024-06-27 20:54:24,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 112 transitions, 1007 flow [2024-06-27 20:54:24,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 112 transitions, 983 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 20:54:24,875 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 764 flow [2024-06-27 20:54:24,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=764, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2024-06-27 20:54:24,875 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-27 20:54:24,875 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 764 flow [2024-06-27 20:54:24,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:24,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:24,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:24,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:54:24,876 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:24,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:24,876 INFO L85 PathProgramCache]: Analyzing trace with hash 665887493, now seen corresponding path program 1 times [2024-06-27 20:54:24,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:24,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041524065] [2024-06-27 20:54:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:24,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:25,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:25,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041524065] [2024-06-27 20:54:25,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041524065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:25,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:25,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:25,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111791592] [2024-06-27 20:54:25,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:25,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:25,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:25,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:25,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:25,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:25,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 764 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:25,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:25,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:25,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:26,336 INFO L124 PetriNetUnfolderBase]: 1812/2696 cut-off events. [2024-06-27 20:54:26,336 INFO L125 PetriNetUnfolderBase]: For 20222/20224 co-relation queries the response was YES. [2024-06-27 20:54:26,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12225 conditions, 2696 events. 1812/2696 cut-off events. For 20222/20224 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12275 event pairs, 548 based on Foata normal form. 2/2698 useless extension candidates. Maximal degree in co-relation 12183. Up to 2366 conditions per place. [2024-06-27 20:54:26,349 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 104 selfloop transitions, 46 changer transitions 0/153 dead transitions. [2024-06-27 20:54:26,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 153 transitions, 1430 flow [2024-06-27 20:54:26,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:54:26,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 20:54:26,351 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 764 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:54:26,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 153 transitions, 1430 flow [2024-06-27 20:54:26,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 153 transitions, 1391 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 20:54:26,368 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 957 flow [2024-06-27 20:54:26,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=957, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2024-06-27 20:54:26,369 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-27 20:54:26,369 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 957 flow [2024-06-27 20:54:26,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:26,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:26,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:26,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:54:26,369 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)] === [2024-06-27 20:54:26,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:26,370 INFO L85 PathProgramCache]: Analyzing trace with hash 665977703, now seen corresponding path program 2 times [2024-06-27 20:54:26,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:26,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860339178] [2024-06-27 20:54:26,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:26,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:27,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:27,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860339178] [2024-06-27 20:54:27,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860339178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:27,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:27,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:27,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826648707] [2024-06-27 20:54:27,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:27,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:27,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:27,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:27,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:27,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:27,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 957 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:27,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:27,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:27,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:27,649 INFO L124 PetriNetUnfolderBase]: 1838/2732 cut-off events. [2024-06-27 20:54:27,652 INFO L125 PetriNetUnfolderBase]: For 24805/24809 co-relation queries the response was YES. [2024-06-27 20:54:27,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13355 conditions, 2732 events. 1838/2732 cut-off events. For 24805/24809 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12395 event pairs, 582 based on Foata normal form. 9/2741 useless extension candidates. Maximal degree in co-relation 13311. Up to 2522 conditions per place. [2024-06-27 20:54:27,698 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 108 selfloop transitions, 44 changer transitions 0/155 dead transitions. [2024-06-27 20:54:27,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 155 transitions, 1460 flow [2024-06-27 20:54:27,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:54:27,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:54:27,700 INFO L175 Difference]: Start difference. First operand has 95 places, 109 transitions, 957 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:54:27,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 155 transitions, 1460 flow [2024-06-27 20:54:27,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 155 transitions, 1376 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 20:54:27,727 INFO L231 Difference]: Finished difference. Result has 100 places, 116 transitions, 1057 flow [2024-06-27 20:54:27,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1057, PETRI_PLACES=100, PETRI_TRANSITIONS=116} [2024-06-27 20:54:27,727 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-27 20:54:27,727 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 116 transitions, 1057 flow [2024-06-27 20:54:27,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:27,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:27,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:27,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:54:27,728 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)] === [2024-06-27 20:54:27,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash 665977858, now seen corresponding path program 1 times [2024-06-27 20:54:27,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:27,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446897289] [2024-06-27 20:54:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:28,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:28,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446897289] [2024-06-27 20:54:28,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446897289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:28,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:28,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:28,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158872511] [2024-06-27 20:54:28,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:28,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:28,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:28,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:28,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:28,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:28,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 116 transitions, 1057 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:28,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:28,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:28,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:28,958 INFO L124 PetriNetUnfolderBase]: 1914/2843 cut-off events. [2024-06-27 20:54:28,958 INFO L125 PetriNetUnfolderBase]: For 28299/28301 co-relation queries the response was YES. [2024-06-27 20:54:28,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14657 conditions, 2843 events. 1914/2843 cut-off events. For 28299/28301 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13006 event pairs, 521 based on Foata normal form. 8/2851 useless extension candidates. Maximal degree in co-relation 14611. Up to 2418 conditions per place. [2024-06-27 20:54:28,976 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 110 selfloop transitions, 58 changer transitions 0/171 dead transitions. [2024-06-27 20:54:28,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 171 transitions, 1814 flow [2024-06-27 20:54:28,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:54:28,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 20:54:28,977 INFO L175 Difference]: Start difference. First operand has 100 places, 116 transitions, 1057 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:54:28,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 171 transitions, 1814 flow [2024-06-27 20:54:29,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 171 transitions, 1699 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:29,005 INFO L231 Difference]: Finished difference. Result has 103 places, 130 transitions, 1236 flow [2024-06-27 20:54:29,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1236, PETRI_PLACES=103, PETRI_TRANSITIONS=130} [2024-06-27 20:54:29,005 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-27 20:54:29,005 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 130 transitions, 1236 flow [2024-06-27 20:54:29,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:29,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:29,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:29,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:54:29,006 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)] === [2024-06-27 20:54:29,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:29,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2042510754, now seen corresponding path program 2 times [2024-06-27 20:54:29,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:29,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319771932] [2024-06-27 20:54:29,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:29,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:29,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:29,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319771932] [2024-06-27 20:54:29,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319771932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:29,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:29,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:29,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828331044] [2024-06-27 20:54:29,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:29,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:29,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:29,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:29,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:29,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:29,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 130 transitions, 1236 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:29,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:29,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:29,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:30,409 INFO L124 PetriNetUnfolderBase]: 2048/3036 cut-off events. [2024-06-27 20:54:30,410 INFO L125 PetriNetUnfolderBase]: For 34406/34408 co-relation queries the response was YES. [2024-06-27 20:54:30,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16533 conditions, 3036 events. 2048/3036 cut-off events. For 34406/34408 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13983 event pairs, 569 based on Foata normal form. 4/3040 useless extension candidates. Maximal degree in co-relation 16485. Up to 2761 conditions per place. [2024-06-27 20:54:30,427 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 142 selfloop transitions, 45 changer transitions 0/190 dead transitions. [2024-06-27 20:54:30,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 190 transitions, 2078 flow [2024-06-27 20:54:30,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:54:30,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:54:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 20:54:30,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-27 20:54:30,429 INFO L175 Difference]: Start difference. First operand has 103 places, 130 transitions, 1236 flow. Second operand 10 states and 173 transitions. [2024-06-27 20:54:30,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 190 transitions, 2078 flow [2024-06-27 20:54:30,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 190 transitions, 1997 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 20:54:30,466 INFO L231 Difference]: Finished difference. Result has 112 places, 145 transitions, 1462 flow [2024-06-27 20:54:30,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1462, PETRI_PLACES=112, PETRI_TRANSITIONS=145} [2024-06-27 20:54:30,467 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-27 20:54:30,467 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 145 transitions, 1462 flow [2024-06-27 20:54:30,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:30,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:30,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:30,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:54:30,467 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)] === [2024-06-27 20:54:30,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:30,468 INFO L85 PathProgramCache]: Analyzing trace with hash 669696773, now seen corresponding path program 3 times [2024-06-27 20:54:30,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:30,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469130725] [2024-06-27 20:54:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:30,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:31,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:31,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469130725] [2024-06-27 20:54:31,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469130725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:31,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:31,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:31,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097446392] [2024-06-27 20:54:31,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:31,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:31,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:31,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:31,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:31,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:31,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 145 transitions, 1462 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:31,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:31,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:31,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:32,114 INFO L124 PetriNetUnfolderBase]: 2058/3049 cut-off events. [2024-06-27 20:54:32,115 INFO L125 PetriNetUnfolderBase]: For 38336/38340 co-relation queries the response was YES. [2024-06-27 20:54:32,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17143 conditions, 3049 events. 2058/3049 cut-off events. For 38336/38340 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13977 event pairs, 594 based on Foata normal form. 9/3058 useless extension candidates. Maximal degree in co-relation 17091. Up to 2917 conditions per place. [2024-06-27 20:54:32,131 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 148 selfloop transitions, 34 changer transitions 0/185 dead transitions. [2024-06-27 20:54:32,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 185 transitions, 2001 flow [2024-06-27 20:54:32,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:54:32,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:54:32,132 INFO L175 Difference]: Start difference. First operand has 112 places, 145 transitions, 1462 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:54:32,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 185 transitions, 2001 flow [2024-06-27 20:54:32,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 185 transitions, 1937 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:54:32,169 INFO L231 Difference]: Finished difference. Result has 115 places, 151 transitions, 1562 flow [2024-06-27 20:54:32,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1562, PETRI_PLACES=115, PETRI_TRANSITIONS=151} [2024-06-27 20:54:32,169 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-06-27 20:54:32,169 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 151 transitions, 1562 flow [2024-06-27 20:54:32,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:32,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:32,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:32,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:54:32,170 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)] === [2024-06-27 20:54:32,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:32,170 INFO L85 PathProgramCache]: Analyzing trace with hash 669696928, now seen corresponding path program 3 times [2024-06-27 20:54:32,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:32,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305527763] [2024-06-27 20:54:32,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:32,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:32,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:32,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305527763] [2024-06-27 20:54:32,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305527763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:32,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:32,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:32,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249361374] [2024-06-27 20:54:32,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:32,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:32,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:32,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:32,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:32,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:32,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 151 transitions, 1562 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:32,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:32,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:32,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:33,599 INFO L124 PetriNetUnfolderBase]: 2038/3022 cut-off events. [2024-06-27 20:54:33,599 INFO L125 PetriNetUnfolderBase]: For 41171/41173 co-relation queries the response was YES. [2024-06-27 20:54:33,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17592 conditions, 3022 events. 2038/3022 cut-off events. For 41171/41173 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13858 event pairs, 560 based on Foata normal form. 8/3030 useless extension candidates. Maximal degree in co-relation 17538. Up to 2767 conditions per place. [2024-06-27 20:54:33,619 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 137 selfloop transitions, 45 changer transitions 0/185 dead transitions. [2024-06-27 20:54:33,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 185 transitions, 2152 flow [2024-06-27 20:54:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:54:33,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-27 20:54:33,622 INFO L175 Difference]: Start difference. First operand has 115 places, 151 transitions, 1562 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:54:33,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 185 transitions, 2152 flow [2024-06-27 20:54:33,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 185 transitions, 2027 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:33,667 INFO L231 Difference]: Finished difference. Result has 117 places, 151 transitions, 1539 flow [2024-06-27 20:54:33,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1539, PETRI_PLACES=117, PETRI_TRANSITIONS=151} [2024-06-27 20:54:33,667 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-06-27 20:54:33,667 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 151 transitions, 1539 flow [2024-06-27 20:54:33,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:33,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:33,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:33,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:54:33,668 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)] === [2024-06-27 20:54:33,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:33,668 INFO L85 PathProgramCache]: Analyzing trace with hash -829524560, now seen corresponding path program 4 times [2024-06-27 20:54:33,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:33,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374460973] [2024-06-27 20:54:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:33,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:34,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:34,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374460973] [2024-06-27 20:54:34,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374460973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:34,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:34,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:34,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801111092] [2024-06-27 20:54:34,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:34,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:34,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:34,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:34,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:34,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:34,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 151 transitions, 1539 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:34,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:34,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:34,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:35,062 INFO L124 PetriNetUnfolderBase]: 2060/3054 cut-off events. [2024-06-27 20:54:35,063 INFO L125 PetriNetUnfolderBase]: For 44748/44752 co-relation queries the response was YES. [2024-06-27 20:54:35,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17990 conditions, 3054 events. 2060/3054 cut-off events. For 44748/44752 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13977 event pairs, 592 based on Foata normal form. 8/3062 useless extension candidates. Maximal degree in co-relation 17935. Up to 2972 conditions per place. [2024-06-27 20:54:35,082 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 153 selfloop transitions, 19 changer transitions 0/175 dead transitions. [2024-06-27 20:54:35,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 175 transitions, 1980 flow [2024-06-27 20:54:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:54:35,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:54:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 20:54:35,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-27 20:54:35,084 INFO L175 Difference]: Start difference. First operand has 117 places, 151 transitions, 1539 flow. Second operand 7 states and 113 transitions. [2024-06-27 20:54:35,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 175 transitions, 1980 flow [2024-06-27 20:54:35,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 175 transitions, 1890 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:54:35,124 INFO L231 Difference]: Finished difference. Result has 117 places, 154 transitions, 1542 flow [2024-06-27 20:54:35,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1542, PETRI_PLACES=117, PETRI_TRANSITIONS=154} [2024-06-27 20:54:35,124 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-06-27 20:54:35,124 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 154 transitions, 1542 flow [2024-06-27 20:54:35,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:35,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:35,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:35,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:54:35,125 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:35,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:35,125 INFO L85 PathProgramCache]: Analyzing trace with hash -836881945, now seen corresponding path program 4 times [2024-06-27 20:54:35,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:35,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367664792] [2024-06-27 20:54:35,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:35,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:36,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:36,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367664792] [2024-06-27 20:54:36,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367664792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:36,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:36,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:36,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065317641] [2024-06-27 20:54:36,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:36,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:36,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:36,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:36,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:36,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:36,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 154 transitions, 1542 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:36,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:36,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:36,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:36,662 INFO L124 PetriNetUnfolderBase]: 2085/3088 cut-off events. [2024-06-27 20:54:36,662 INFO L125 PetriNetUnfolderBase]: For 48905/48909 co-relation queries the response was YES. [2024-06-27 20:54:36,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18270 conditions, 3088 events. 2085/3088 cut-off events. For 48905/48909 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14176 event pairs, 591 based on Foata normal form. 12/3100 useless extension candidates. Maximal degree in co-relation 18214. Up to 2924 conditions per place. [2024-06-27 20:54:36,682 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 156 selfloop transitions, 37 changer transitions 0/196 dead transitions. [2024-06-27 20:54:36,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 196 transitions, 2139 flow [2024-06-27 20:54:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:54:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:54:36,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:54:36,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-27 20:54:36,683 INFO L175 Difference]: Start difference. First operand has 117 places, 154 transitions, 1542 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:54:36,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 196 transitions, 2139 flow [2024-06-27 20:54:36,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 196 transitions, 2083 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:54:36,730 INFO L231 Difference]: Finished difference. Result has 119 places, 161 transitions, 1677 flow [2024-06-27 20:54:36,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1677, PETRI_PLACES=119, PETRI_TRANSITIONS=161} [2024-06-27 20:54:36,731 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-27 20:54:36,731 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 161 transitions, 1677 flow [2024-06-27 20:54:36,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:36,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:36,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:36,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:54:36,732 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)] === [2024-06-27 20:54:36,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:36,732 INFO L85 PathProgramCache]: Analyzing trace with hash -836881790, now seen corresponding path program 5 times [2024-06-27 20:54:36,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:36,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712769752] [2024-06-27 20:54:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:36,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:37,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:37,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712769752] [2024-06-27 20:54:37,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712769752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:37,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:37,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:37,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025664561] [2024-06-27 20:54:37,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:37,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:37,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:37,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:37,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:37,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 161 transitions, 1677 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:37,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:37,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:37,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:37,966 INFO L124 PetriNetUnfolderBase]: 2097/3107 cut-off events. [2024-06-27 20:54:37,967 INFO L125 PetriNetUnfolderBase]: For 53561/53563 co-relation queries the response was YES. [2024-06-27 20:54:37,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19185 conditions, 3107 events. 2097/3107 cut-off events. For 53561/53563 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14278 event pairs, 583 based on Foata normal form. 8/3115 useless extension candidates. Maximal degree in co-relation 19128. Up to 2799 conditions per place. [2024-06-27 20:54:37,987 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 148 selfloop transitions, 46 changer transitions 0/197 dead transitions. [2024-06-27 20:54:37,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 197 transitions, 2363 flow [2024-06-27 20:54:37,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:54:37,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:54:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:54:37,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-27 20:54:37,989 INFO L175 Difference]: Start difference. First operand has 119 places, 161 transitions, 1677 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:54:37,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 197 transitions, 2363 flow [2024-06-27 20:54:38,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 197 transitions, 2246 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 20:54:38,035 INFO L231 Difference]: Finished difference. Result has 122 places, 165 transitions, 1744 flow [2024-06-27 20:54:38,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1744, PETRI_PLACES=122, PETRI_TRANSITIONS=165} [2024-06-27 20:54:38,036 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-27 20:54:38,036 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 165 transitions, 1744 flow [2024-06-27 20:54:38,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:38,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:38,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:38,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:54:38,037 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)] === [2024-06-27 20:54:38,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:38,037 INFO L85 PathProgramCache]: Analyzing trace with hash -829257433, now seen corresponding path program 1 times [2024-06-27 20:54:38,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:38,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406651783] [2024-06-27 20:54:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:38,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:38,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:38,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406651783] [2024-06-27 20:54:38,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406651783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:38,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:38,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:38,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734987522] [2024-06-27 20:54:38,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:38,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:38,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:38,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:38,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:38,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:38,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 165 transitions, 1744 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:38,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:38,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:38,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:39,450 INFO L124 PetriNetUnfolderBase]: 2092/3099 cut-off events. [2024-06-27 20:54:39,451 INFO L125 PetriNetUnfolderBase]: For 56468/56472 co-relation queries the response was YES. [2024-06-27 20:54:39,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19400 conditions, 3099 events. 2092/3099 cut-off events. For 56468/56472 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14244 event pairs, 577 based on Foata normal form. 6/3105 useless extension candidates. Maximal degree in co-relation 19341. Up to 3032 conditions per place. [2024-06-27 20:54:39,473 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 161 selfloop transitions, 18 changer transitions 0/182 dead transitions. [2024-06-27 20:54:39,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 182 transitions, 2164 flow [2024-06-27 20:54:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:54:39,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:54:39,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-27 20:54:39,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-27 20:54:39,475 INFO L175 Difference]: Start difference. First operand has 122 places, 165 transitions, 1744 flow. Second operand 6 states and 98 transitions. [2024-06-27 20:54:39,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 182 transitions, 2164 flow [2024-06-27 20:54:39,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 182 transitions, 1991 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:39,527 INFO L231 Difference]: Finished difference. Result has 122 places, 166 transitions, 1641 flow [2024-06-27 20:54:39,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1641, PETRI_PLACES=122, PETRI_TRANSITIONS=166} [2024-06-27 20:54:39,528 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-27 20:54:39,528 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 166 transitions, 1641 flow [2024-06-27 20:54:39,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:39,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:39,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:39,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:54:39,529 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)] === [2024-06-27 20:54:39,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:39,529 INFO L85 PathProgramCache]: Analyzing trace with hash -836876210, now seen corresponding path program 6 times [2024-06-27 20:54:39,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:39,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942634525] [2024-06-27 20:54:39,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:39,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:40,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:40,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942634525] [2024-06-27 20:54:40,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942634525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:40,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:40,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:40,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224985444] [2024-06-27 20:54:40,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:40,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:40,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:40,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:40,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:40,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:40,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 166 transitions, 1641 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:40,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:40,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:40,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:40,871 INFO L124 PetriNetUnfolderBase]: 2098/3109 cut-off events. [2024-06-27 20:54:40,871 INFO L125 PetriNetUnfolderBase]: For 59872/59874 co-relation queries the response was YES. [2024-06-27 20:54:40,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19317 conditions, 3109 events. 2098/3109 cut-off events. For 59872/59874 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14272 event pairs, 588 based on Foata normal form. 4/3113 useless extension candidates. Maximal degree in co-relation 19258. Up to 2802 conditions per place. [2024-06-27 20:54:40,891 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 146 selfloop transitions, 47 changer transitions 0/196 dead transitions. [2024-06-27 20:54:40,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 196 transitions, 2238 flow [2024-06-27 20:54:40,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:54:40,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:54:40,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:54:40,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:54:40,892 INFO L175 Difference]: Start difference. First operand has 122 places, 166 transitions, 1641 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:54:40,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 196 transitions, 2238 flow [2024-06-27 20:54:40,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 196 transitions, 2196 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 20:54:40,940 INFO L231 Difference]: Finished difference. Result has 125 places, 169 transitions, 1758 flow [2024-06-27 20:54:40,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1758, PETRI_PLACES=125, PETRI_TRANSITIONS=169} [2024-06-27 20:54:40,940 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-27 20:54:40,941 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 169 transitions, 1758 flow [2024-06-27 20:54:40,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:40,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:40,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:40,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:54:40,942 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)] === [2024-06-27 20:54:40,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:40,943 INFO L85 PathProgramCache]: Analyzing trace with hash -832383305, now seen corresponding path program 1 times [2024-06-27 20:54:40,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:40,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203524079] [2024-06-27 20:54:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:40,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:41,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:41,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203524079] [2024-06-27 20:54:41,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203524079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:41,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:41,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:41,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089709823] [2024-06-27 20:54:41,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:41,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:41,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:41,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:41,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:41,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:41,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 169 transitions, 1758 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:41,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:41,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:41,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:42,814 INFO L124 PetriNetUnfolderBase]: 2380/3535 cut-off events. [2024-06-27 20:54:42,814 INFO L125 PetriNetUnfolderBase]: For 72618/72622 co-relation queries the response was YES. [2024-06-27 20:54:42,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22384 conditions, 3535 events. 2380/3535 cut-off events. For 72618/72622 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16832 event pairs, 458 based on Foata normal form. 22/3557 useless extension candidates. Maximal degree in co-relation 22324. Up to 2826 conditions per place. [2024-06-27 20:54:42,841 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 157 selfloop transitions, 77 changer transitions 0/237 dead transitions. [2024-06-27 20:54:42,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 237 transitions, 2732 flow [2024-06-27 20:54:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:54:42,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-27 20:54:42,843 INFO L175 Difference]: Start difference. First operand has 125 places, 169 transitions, 1758 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:54:42,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 237 transitions, 2732 flow [2024-06-27 20:54:42,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 237 transitions, 2653 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 20:54:42,915 INFO L231 Difference]: Finished difference. Result has 133 places, 180 transitions, 2064 flow [2024-06-27 20:54:42,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2064, PETRI_PLACES=133, PETRI_TRANSITIONS=180} [2024-06-27 20:54:42,916 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-27 20:54:42,916 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 180 transitions, 2064 flow [2024-06-27 20:54:42,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:42,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:42,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:42,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:54:42,917 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)] === [2024-06-27 20:54:42,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:42,917 INFO L85 PathProgramCache]: Analyzing trace with hash -832322855, now seen corresponding path program 2 times [2024-06-27 20:54:42,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:42,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659650130] [2024-06-27 20:54:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:42,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:43,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:43,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659650130] [2024-06-27 20:54:43,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659650130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:43,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:43,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:43,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90753103] [2024-06-27 20:54:43,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:43,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:43,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:43,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:43,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:43,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:43,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 180 transitions, 2064 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:43,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:43,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:43,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:44,766 INFO L124 PetriNetUnfolderBase]: 2440/3630 cut-off events. [2024-06-27 20:54:44,767 INFO L125 PetriNetUnfolderBase]: For 84231/84235 co-relation queries the response was YES. [2024-06-27 20:54:44,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24558 conditions, 3630 events. 2440/3630 cut-off events. For 84231/84235 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17428 event pairs, 651 based on Foata normal form. 25/3655 useless extension candidates. Maximal degree in co-relation 24495. Up to 3245 conditions per place. [2024-06-27 20:54:44,794 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 160 selfloop transitions, 75 changer transitions 0/238 dead transitions. [2024-06-27 20:54:44,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 238 transitions, 2806 flow [2024-06-27 20:54:44,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:54:44,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:54:44,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 20:54:44,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-06-27 20:54:44,796 INFO L175 Difference]: Start difference. First operand has 133 places, 180 transitions, 2064 flow. Second operand 10 states and 186 transitions. [2024-06-27 20:54:44,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 238 transitions, 2806 flow [2024-06-27 20:54:44,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 238 transitions, 2725 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 20:54:44,889 INFO L231 Difference]: Finished difference. Result has 140 places, 183 transitions, 2222 flow [2024-06-27 20:54:44,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2222, PETRI_PLACES=140, PETRI_TRANSITIONS=183} [2024-06-27 20:54:44,890 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-27 20:54:44,890 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 183 transitions, 2222 flow [2024-06-27 20:54:44,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:44,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:44,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:44,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:54:44,890 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)] === [2024-06-27 20:54:44,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:44,891 INFO L85 PathProgramCache]: Analyzing trace with hash -829521571, now seen corresponding path program 1 times [2024-06-27 20:54:44,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:44,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645746621] [2024-06-27 20:54:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:44,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:45,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:45,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645746621] [2024-06-27 20:54:45,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645746621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:45,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:45,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:45,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540884938] [2024-06-27 20:54:45,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:45,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:45,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:45,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:45,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:45,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:45,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 183 transitions, 2222 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:45,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:45,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:45,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:46,440 INFO L124 PetriNetUnfolderBase]: 2430/3617 cut-off events. [2024-06-27 20:54:46,440 INFO L125 PetriNetUnfolderBase]: For 90098/90100 co-relation queries the response was YES. [2024-06-27 20:54:46,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25258 conditions, 3617 events. 2430/3617 cut-off events. For 90098/90100 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17416 event pairs, 613 based on Foata normal form. 4/3621 useless extension candidates. Maximal degree in co-relation 25192. Up to 3272 conditions per place. [2024-06-27 20:54:46,468 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 151 selfloop transitions, 64 changer transitions 0/218 dead transitions. [2024-06-27 20:54:46,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 218 transitions, 2844 flow [2024-06-27 20:54:46,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:54:46,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:54:46,469 INFO L175 Difference]: Start difference. First operand has 140 places, 183 transitions, 2222 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:54:46,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 218 transitions, 2844 flow [2024-06-27 20:54:46,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 218 transitions, 2644 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 20:54:46,566 INFO L231 Difference]: Finished difference. Result has 140 places, 183 transitions, 2162 flow [2024-06-27 20:54:46,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2162, PETRI_PLACES=140, PETRI_TRANSITIONS=183} [2024-06-27 20:54:46,567 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-27 20:54:46,567 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 183 transitions, 2162 flow [2024-06-27 20:54:46,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:46,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:46,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:46,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:54:46,568 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)] === [2024-06-27 20:54:46,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:46,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1106684321, now seen corresponding path program 1 times [2024-06-27 20:54:46,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:46,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541240582] [2024-06-27 20:54:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:46,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:47,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:47,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541240582] [2024-06-27 20:54:47,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541240582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:47,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:47,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:47,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030673247] [2024-06-27 20:54:47,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:47,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:47,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:47,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:47,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:47,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:47,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 183 transitions, 2162 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:47,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:47,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:47,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:48,289 INFO L124 PetriNetUnfolderBase]: 2492/3723 cut-off events. [2024-06-27 20:54:48,289 INFO L125 PetriNetUnfolderBase]: For 98640/98642 co-relation queries the response was YES. [2024-06-27 20:54:48,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26001 conditions, 3723 events. 2492/3723 cut-off events. For 98640/98642 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18133 event pairs, 1080 based on Foata normal form. 4/3727 useless extension candidates. Maximal degree in co-relation 25934. Up to 3559 conditions per place. [2024-06-27 20:54:48,319 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 184 selfloop transitions, 35 changer transitions 0/222 dead transitions. [2024-06-27 20:54:48,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 222 transitions, 2851 flow [2024-06-27 20:54:48,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 20:54:48,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2024-06-27 20:54:48,320 INFO L175 Difference]: Start difference. First operand has 140 places, 183 transitions, 2162 flow. Second operand 9 states and 139 transitions. [2024-06-27 20:54:48,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 222 transitions, 2851 flow [2024-06-27 20:54:48,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 222 transitions, 2717 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 20:54:48,429 INFO L231 Difference]: Finished difference. Result has 148 places, 196 transitions, 2339 flow [2024-06-27 20:54:48,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2339, PETRI_PLACES=148, PETRI_TRANSITIONS=196} [2024-06-27 20:54:48,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-27 20:54:48,430 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 196 transitions, 2339 flow [2024-06-27 20:54:48,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:48,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:48,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:48,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:54:48,431 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)] === [2024-06-27 20:54:48,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:48,431 INFO L85 PathProgramCache]: Analyzing trace with hash -151467589, now seen corresponding path program 2 times [2024-06-27 20:54:48,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:48,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494696889] [2024-06-27 20:54:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:48,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:49,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:49,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494696889] [2024-06-27 20:54:49,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494696889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:49,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:49,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:49,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937667265] [2024-06-27 20:54:49,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:49,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:49,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:49,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:49,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:49,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:49,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 196 transitions, 2339 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:49,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:49,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:49,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:50,233 INFO L124 PetriNetUnfolderBase]: 2725/4071 cut-off events. [2024-06-27 20:54:50,233 INFO L125 PetriNetUnfolderBase]: For 108659/108661 co-relation queries the response was YES. [2024-06-27 20:54:50,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28760 conditions, 4071 events. 2725/4071 cut-off events. For 108659/108661 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 20156 event pairs, 957 based on Foata normal form. 4/4075 useless extension candidates. Maximal degree in co-relation 28688. Up to 3689 conditions per place. [2024-06-27 20:54:50,267 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 200 selfloop transitions, 84 changer transitions 0/287 dead transitions. [2024-06-27 20:54:50,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 287 transitions, 3836 flow [2024-06-27 20:54:50,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:54:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:54:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 20:54:50,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435 [2024-06-27 20:54:50,269 INFO L175 Difference]: Start difference. First operand has 148 places, 196 transitions, 2339 flow. Second operand 10 states and 174 transitions. [2024-06-27 20:54:50,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 287 transitions, 3836 flow [2024-06-27 20:54:50,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 287 transitions, 3730 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 20:54:50,384 INFO L231 Difference]: Finished difference. Result has 159 places, 242 transitions, 3164 flow [2024-06-27 20:54:50,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3164, PETRI_PLACES=159, PETRI_TRANSITIONS=242} [2024-06-27 20:54:50,385 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-27 20:54:50,385 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 242 transitions, 3164 flow [2024-06-27 20:54:50,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:50,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:50,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:50,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:54:50,386 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:50,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:50,386 INFO L85 PathProgramCache]: Analyzing trace with hash 2111582737, now seen corresponding path program 3 times [2024-06-27 20:54:50,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:50,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151592298] [2024-06-27 20:54:50,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:50,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:51,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:51,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151592298] [2024-06-27 20:54:51,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151592298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:51,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:51,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:51,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580279298] [2024-06-27 20:54:51,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:51,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:51,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:51,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:51,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:51,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:51,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 242 transitions, 3164 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:51,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:51,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:51,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:52,404 INFO L124 PetriNetUnfolderBase]: 2900/4321 cut-off events. [2024-06-27 20:54:52,404 INFO L125 PetriNetUnfolderBase]: For 123459/123463 co-relation queries the response was YES. [2024-06-27 20:54:52,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31128 conditions, 4321 events. 2900/4321 cut-off events. For 123459/123463 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 21521 event pairs, 956 based on Foata normal form. 22/4343 useless extension candidates. Maximal degree in co-relation 31050. Up to 4013 conditions per place. [2024-06-27 20:54:52,444 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 259 selfloop transitions, 63 changer transitions 0/325 dead transitions. [2024-06-27 20:54:52,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 325 transitions, 4425 flow [2024-06-27 20:54:52,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:54:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:54:52,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 20:54:52,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2024-06-27 20:54:52,445 INFO L175 Difference]: Start difference. First operand has 159 places, 242 transitions, 3164 flow. Second operand 10 states and 181 transitions. [2024-06-27 20:54:52,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 325 transitions, 4425 flow [2024-06-27 20:54:52,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 325 transitions, 4392 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 20:54:52,655 INFO L231 Difference]: Finished difference. Result has 172 places, 276 transitions, 3714 flow [2024-06-27 20:54:52,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3131, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3714, PETRI_PLACES=172, PETRI_TRANSITIONS=276} [2024-06-27 20:54:52,656 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-27 20:54:52,656 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 276 transitions, 3714 flow [2024-06-27 20:54:52,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:52,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:52,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:52,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:54:52,656 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)] === [2024-06-27 20:54:52,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:52,657 INFO L85 PathProgramCache]: Analyzing trace with hash 2111760491, now seen corresponding path program 3 times [2024-06-27 20:54:52,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:52,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115144632] [2024-06-27 20:54:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:52,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:53,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:53,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115144632] [2024-06-27 20:54:53,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115144632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:53,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:53,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:53,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232947825] [2024-06-27 20:54:53,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:53,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:53,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:53,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:53,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:53,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:53,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 276 transitions, 3714 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:53,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:53,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:53,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:54,424 INFO L124 PetriNetUnfolderBase]: 2890/4308 cut-off events. [2024-06-27 20:54:54,424 INFO L125 PetriNetUnfolderBase]: For 128155/128157 co-relation queries the response was YES. [2024-06-27 20:54:54,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32478 conditions, 4308 events. 2890/4308 cut-off events. For 128155/128157 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21506 event pairs, 963 based on Foata normal form. 4/4312 useless extension candidates. Maximal degree in co-relation 32393. Up to 3936 conditions per place. [2024-06-27 20:54:54,537 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 233 selfloop transitions, 88 changer transitions 0/324 dead transitions. [2024-06-27 20:54:54,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 324 transitions, 4513 flow [2024-06-27 20:54:54,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:54:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:54:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-27 20:54:54,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:54:54,539 INFO L175 Difference]: Start difference. First operand has 172 places, 276 transitions, 3714 flow. Second operand 12 states and 200 transitions. [2024-06-27 20:54:54,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 324 transitions, 4513 flow [2024-06-27 20:54:54,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 324 transitions, 4473 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-27 20:54:54,721 INFO L231 Difference]: Finished difference. Result has 184 places, 277 transitions, 3874 flow [2024-06-27 20:54:54,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3674, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3874, PETRI_PLACES=184, PETRI_TRANSITIONS=277} [2024-06-27 20:54:54,721 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-27 20:54:54,722 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 277 transitions, 3874 flow [2024-06-27 20:54:54,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:54,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:54,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:54,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:54:54,722 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)] === [2024-06-27 20:54:54,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:54,723 INFO L85 PathProgramCache]: Analyzing trace with hash 389855853, now seen corresponding path program 2 times [2024-06-27 20:54:54,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:54,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698708020] [2024-06-27 20:54:54,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:54,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:55,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:55,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698708020] [2024-06-27 20:54:55,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698708020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:55,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:55,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:55,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600664412] [2024-06-27 20:54:55,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:55,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:55,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:55,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:55,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:55,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:55,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 277 transitions, 3874 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:55,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:55,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:55,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:56,682 INFO L124 PetriNetUnfolderBase]: 2918/4352 cut-off events. [2024-06-27 20:54:56,683 INFO L125 PetriNetUnfolderBase]: For 136502/136504 co-relation queries the response was YES. [2024-06-27 20:54:56,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33221 conditions, 4352 events. 2918/4352 cut-off events. For 136502/136504 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 21822 event pairs, 964 based on Foata normal form. 4/4356 useless extension candidates. Maximal degree in co-relation 33132. Up to 4084 conditions per place. [2024-06-27 20:54:56,721 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 238 selfloop transitions, 72 changer transitions 0/313 dead transitions. [2024-06-27 20:54:56,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 313 transitions, 4630 flow [2024-06-27 20:54:56,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:56,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:56,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:54:56,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-27 20:54:56,722 INFO L175 Difference]: Start difference. First operand has 184 places, 277 transitions, 3874 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:54:56,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 313 transitions, 4630 flow [2024-06-27 20:54:56,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 313 transitions, 4443 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 20:54:56,908 INFO L231 Difference]: Finished difference. Result has 184 places, 281 transitions, 3887 flow [2024-06-27 20:54:56,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3687, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3887, PETRI_PLACES=184, PETRI_TRANSITIONS=281} [2024-06-27 20:54:56,908 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-27 20:54:56,908 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 281 transitions, 3887 flow [2024-06-27 20:54:56,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:56,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:56,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:56,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:54:56,909 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)] === [2024-06-27 20:54:56,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:56,909 INFO L85 PathProgramCache]: Analyzing trace with hash -714230401, now seen corresponding path program 4 times [2024-06-27 20:54:56,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:56,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382259542] [2024-06-27 20:54:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:56,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:57,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:57,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382259542] [2024-06-27 20:54:57,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382259542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:57,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:57,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:57,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221149081] [2024-06-27 20:54:57,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:57,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:57,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:57,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:57,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:57,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:54:57,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 281 transitions, 3887 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:57,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:57,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:54:57,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:58,585 INFO L124 PetriNetUnfolderBase]: 2908/4340 cut-off events. [2024-06-27 20:54:58,585 INFO L125 PetriNetUnfolderBase]: For 141688/141690 co-relation queries the response was YES. [2024-06-27 20:54:58,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33351 conditions, 4340 events. 2908/4340 cut-off events. For 141688/141690 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 21771 event pairs, 965 based on Foata normal form. 4/4344 useless extension candidates. Maximal degree in co-relation 33261. Up to 3883 conditions per place. [2024-06-27 20:54:58,628 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 213 selfloop transitions, 95 changer transitions 0/311 dead transitions. [2024-06-27 20:54:58,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 311 transitions, 4613 flow [2024-06-27 20:54:58,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:54:58,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-27 20:54:58,630 INFO L175 Difference]: Start difference. First operand has 184 places, 281 transitions, 3887 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:54:58,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 311 transitions, 4613 flow [2024-06-27 20:54:58,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 311 transitions, 4429 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 20:54:58,841 INFO L231 Difference]: Finished difference. Result has 185 places, 281 transitions, 3922 flow [2024-06-27 20:54:58,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3707, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3922, PETRI_PLACES=185, PETRI_TRANSITIONS=281} [2024-06-27 20:54:58,842 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-27 20:54:58,842 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 281 transitions, 3922 flow [2024-06-27 20:54:58,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:58,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:58,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:58,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:54:58,843 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)] === [2024-06-27 20:54:58,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:58,843 INFO L85 PathProgramCache]: Analyzing trace with hash -714235175, now seen corresponding path program 4 times [2024-06-27 20:54:58,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:58,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852609371] [2024-06-27 20:54:58,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:58,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:59,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:59,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852609371] [2024-06-27 20:54:59,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852609371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:59,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:59,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:59,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092031030] [2024-06-27 20:54:59,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:59,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:59,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:59,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:59,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:00,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:00,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 281 transitions, 3922 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:00,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:00,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:00,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:01,026 INFO L124 PetriNetUnfolderBase]: 2977/4446 cut-off events. [2024-06-27 20:55:01,027 INFO L125 PetriNetUnfolderBase]: For 158387/158391 co-relation queries the response was YES. [2024-06-27 20:55:01,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34488 conditions, 4446 events. 2977/4446 cut-off events. For 158387/158391 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 22423 event pairs, 1004 based on Foata normal form. 22/4468 useless extension candidates. Maximal degree in co-relation 34397. Up to 4012 conditions per place. [2024-06-27 20:55:01,070 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 245 selfloop transitions, 78 changer transitions 0/326 dead transitions. [2024-06-27 20:55:01,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 326 transitions, 4843 flow [2024-06-27 20:55:01,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:55:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:55:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:55:01,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:55:01,072 INFO L175 Difference]: Start difference. First operand has 185 places, 281 transitions, 3922 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:55:01,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 326 transitions, 4843 flow [2024-06-27 20:55:01,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 326 transitions, 4668 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 20:55:01,321 INFO L231 Difference]: Finished difference. Result has 187 places, 284 transitions, 3986 flow [2024-06-27 20:55:01,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3749, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3986, PETRI_PLACES=187, PETRI_TRANSITIONS=284} [2024-06-27 20:55:01,322 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-27 20:55:01,322 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 284 transitions, 3986 flow [2024-06-27 20:55:01,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:01,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:01,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:01,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:55:01,322 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)] === [2024-06-27 20:55:01,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:01,323 INFO L85 PathProgramCache]: Analyzing trace with hash -173535177, now seen corresponding path program 5 times [2024-06-27 20:55:01,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:01,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533590535] [2024-06-27 20:55:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:01,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:02,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:02,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533590535] [2024-06-27 20:55:02,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533590535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:02,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:02,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:02,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851946237] [2024-06-27 20:55:02,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:02,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:02,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:02,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:02,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:02,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:02,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 284 transitions, 3986 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:02,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:02,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:02,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:03,201 INFO L124 PetriNetUnfolderBase]: 3049/4568 cut-off events. [2024-06-27 20:55:03,201 INFO L125 PetriNetUnfolderBase]: For 142731/142743 co-relation queries the response was YES. [2024-06-27 20:55:03,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34305 conditions, 4568 events. 3049/4568 cut-off events. For 142731/142743 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 23188 event pairs, 765 based on Foata normal form. 38/4606 useless extension candidates. Maximal degree in co-relation 34215. Up to 4026 conditions per place. [2024-06-27 20:55:03,238 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 251 selfloop transitions, 74 changer transitions 0/328 dead transitions. [2024-06-27 20:55:03,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 328 transitions, 4963 flow [2024-06-27 20:55:03,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:55:03,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:55:03,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:55:03,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-27 20:55:03,239 INFO L175 Difference]: Start difference. First operand has 187 places, 284 transitions, 3986 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:55:03,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 328 transitions, 4963 flow [2024-06-27 20:55:03,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 328 transitions, 4785 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 20:55:03,445 INFO L231 Difference]: Finished difference. Result has 189 places, 286 transitions, 4043 flow [2024-06-27 20:55:03,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3814, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4043, PETRI_PLACES=189, PETRI_TRANSITIONS=286} [2024-06-27 20:55:03,446 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2024-06-27 20:55:03,446 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 286 transitions, 4043 flow [2024-06-27 20:55:03,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:03,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:03,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:03,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:55:03,446 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)] === [2024-06-27 20:55:03,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:03,447 INFO L85 PathProgramCache]: Analyzing trace with hash -173350479, now seen corresponding path program 3 times [2024-06-27 20:55:03,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:03,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771599392] [2024-06-27 20:55:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:03,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:04,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:04,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771599392] [2024-06-27 20:55:04,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771599392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:04,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:04,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:04,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305066442] [2024-06-27 20:55:04,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:04,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:04,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:04,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:04,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:04,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:04,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 286 transitions, 4043 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:04,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:04,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:04,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:05,252 INFO L124 PetriNetUnfolderBase]: 3066/4605 cut-off events. [2024-06-27 20:55:05,253 INFO L125 PetriNetUnfolderBase]: For 142848/142850 co-relation queries the response was YES. [2024-06-27 20:55:05,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34755 conditions, 4605 events. 3066/4605 cut-off events. For 142848/142850 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 23674 event pairs, 980 based on Foata normal form. 4/4609 useless extension candidates. Maximal degree in co-relation 34663. Up to 4294 conditions per place. [2024-06-27 20:55:05,295 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 234 selfloop transitions, 75 changer transitions 0/312 dead transitions. [2024-06-27 20:55:05,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 312 transitions, 4775 flow [2024-06-27 20:55:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:55:05,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:55:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:55:05,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 20:55:05,296 INFO L175 Difference]: Start difference. First operand has 189 places, 286 transitions, 4043 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:55:05,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 312 transitions, 4775 flow [2024-06-27 20:55:05,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 312 transitions, 4473 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 20:55:05,521 INFO L231 Difference]: Finished difference. Result has 189 places, 288 transitions, 3949 flow [2024-06-27 20:55:05,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3741, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3949, PETRI_PLACES=189, PETRI_TRANSITIONS=288} [2024-06-27 20:55:05,522 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2024-06-27 20:55:05,522 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 288 transitions, 3949 flow [2024-06-27 20:55:05,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:05,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:05,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:05,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:55:05,522 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:05,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash 54550671, now seen corresponding path program 4 times [2024-06-27 20:55:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:05,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702055896] [2024-06-27 20:55:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:05,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:06,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:06,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702055896] [2024-06-27 20:55:06,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702055896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:06,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:06,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:06,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357790775] [2024-06-27 20:55:06,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:06,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:06,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:06,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:06,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:06,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:06,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 288 transitions, 3949 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:06,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:06,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:06,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:07,391 INFO L124 PetriNetUnfolderBase]: 3083/4629 cut-off events. [2024-06-27 20:55:07,392 INFO L125 PetriNetUnfolderBase]: For 147373/147377 co-relation queries the response was YES. [2024-06-27 20:55:07,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34682 conditions, 4629 events. 3083/4629 cut-off events. For 147373/147377 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 23631 event pairs, 1149 based on Foata normal form. 8/4637 useless extension candidates. Maximal degree in co-relation 34590. Up to 4523 conditions per place. [2024-06-27 20:55:07,434 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 285 selfloop transitions, 22 changer transitions 0/310 dead transitions. [2024-06-27 20:55:07,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 310 transitions, 4667 flow [2024-06-27 20:55:07,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:55:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:55:07,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 20:55:07,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:55:07,436 INFO L175 Difference]: Start difference. First operand has 189 places, 288 transitions, 3949 flow. Second operand 7 states and 112 transitions. [2024-06-27 20:55:07,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 310 transitions, 4667 flow [2024-06-27 20:55:07,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 310 transitions, 4495 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:55:07,684 INFO L231 Difference]: Finished difference. Result has 191 places, 290 transitions, 3873 flow [2024-06-27 20:55:07,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3873, PETRI_PLACES=191, PETRI_TRANSITIONS=290} [2024-06-27 20:55:07,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-27 20:55:07,685 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 290 transitions, 3873 flow [2024-06-27 20:55:07,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:07,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:07,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:07,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:55:07,685 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:07,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:07,686 INFO L85 PathProgramCache]: Analyzing trace with hash 54781311, now seen corresponding path program 5 times [2024-06-27 20:55:07,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:07,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921724659] [2024-06-27 20:55:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:07,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:08,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:08,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921724659] [2024-06-27 20:55:08,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921724659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:08,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:08,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:08,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177626228] [2024-06-27 20:55:08,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:08,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:08,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:08,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:08,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:08,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:08,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 290 transitions, 3873 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:08,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:08,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:08,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:09,331 INFO L124 PetriNetUnfolderBase]: 3100/4655 cut-off events. [2024-06-27 20:55:09,331 INFO L125 PetriNetUnfolderBase]: For 146720/146724 co-relation queries the response was YES. [2024-06-27 20:55:09,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34581 conditions, 4655 events. 3100/4655 cut-off events. For 146720/146724 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 23845 event pairs, 1135 based on Foata normal form. 8/4663 useless extension candidates. Maximal degree in co-relation 34488. Up to 4518 conditions per place. [2024-06-27 20:55:09,376 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 280 selfloop transitions, 29 changer transitions 0/312 dead transitions. [2024-06-27 20:55:09,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 312 transitions, 4595 flow [2024-06-27 20:55:09,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:55:09,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:55:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 20:55:09,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:55:09,378 INFO L175 Difference]: Start difference. First operand has 191 places, 290 transitions, 3873 flow. Second operand 7 states and 112 transitions. [2024-06-27 20:55:09,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 312 transitions, 4595 flow [2024-06-27 20:55:09,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 312 transitions, 4523 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:55:09,621 INFO L231 Difference]: Finished difference. Result has 193 places, 292 transitions, 3915 flow [2024-06-27 20:55:09,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3801, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3915, PETRI_PLACES=193, PETRI_TRANSITIONS=292} [2024-06-27 20:55:09,622 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-27 20:55:09,622 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 292 transitions, 3915 flow [2024-06-27 20:55:09,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:09,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:09,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:09,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:55:09,622 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:09,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash 63121551, now seen corresponding path program 6 times [2024-06-27 20:55:09,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:09,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755815391] [2024-06-27 20:55:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:09,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:10,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:10,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755815391] [2024-06-27 20:55:10,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755815391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:10,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:10,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:10,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313442976] [2024-06-27 20:55:10,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:10,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:10,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:10,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:10,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:10,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:10,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 292 transitions, 3915 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:10,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:10,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:10,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:11,215 INFO L124 PetriNetUnfolderBase]: 3092/4643 cut-off events. [2024-06-27 20:55:11,216 INFO L125 PetriNetUnfolderBase]: For 152336/152340 co-relation queries the response was YES. [2024-06-27 20:55:11,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34719 conditions, 4643 events. 3092/4643 cut-off events. For 152336/152340 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 23744 event pairs, 1118 based on Foata normal form. 8/4651 useless extension candidates. Maximal degree in co-relation 34625. Up to 4543 conditions per place. [2024-06-27 20:55:11,260 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 294 selfloop transitions, 17 changer transitions 0/314 dead transitions. [2024-06-27 20:55:11,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 314 transitions, 4639 flow [2024-06-27 20:55:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:55:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:55:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 20:55:11,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-27 20:55:11,261 INFO L175 Difference]: Start difference. First operand has 193 places, 292 transitions, 3915 flow. Second operand 7 states and 111 transitions. [2024-06-27 20:55:11,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 314 transitions, 4639 flow [2024-06-27 20:55:11,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 314 transitions, 4545 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:55:11,521 INFO L231 Difference]: Finished difference. Result has 195 places, 294 transitions, 3910 flow [2024-06-27 20:55:11,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3910, PETRI_PLACES=195, PETRI_TRANSITIONS=294} [2024-06-27 20:55:11,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-27 20:55:11,523 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 294 transitions, 3910 flow [2024-06-27 20:55:11,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:11,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:11,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:11,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:55:11,523 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:11,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:11,524 INFO L85 PathProgramCache]: Analyzing trace with hash 62824633, now seen corresponding path program 1 times [2024-06-27 20:55:11,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:11,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949307640] [2024-06-27 20:55:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:11,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:12,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:12,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949307640] [2024-06-27 20:55:12,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949307640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:12,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:12,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:12,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773170074] [2024-06-27 20:55:12,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:12,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:12,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:12,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:12,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:12,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:12,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 294 transitions, 3910 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:12,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:12,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:12,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:13,096 INFO L124 PetriNetUnfolderBase]: 3072/4603 cut-off events. [2024-06-27 20:55:13,097 INFO L125 PetriNetUnfolderBase]: For 149208/149212 co-relation queries the response was YES. [2024-06-27 20:55:13,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34284 conditions, 4603 events. 3072/4603 cut-off events. For 149208/149212 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 23364 event pairs, 1144 based on Foata normal form. 6/4609 useless extension candidates. Maximal degree in co-relation 34189. Up to 4467 conditions per place. [2024-06-27 20:55:13,139 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 281 selfloop transitions, 31 changer transitions 0/315 dead transitions. [2024-06-27 20:55:13,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 315 transitions, 4619 flow [2024-06-27 20:55:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:55:13,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:55:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 20:55:13,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-27 20:55:13,141 INFO L175 Difference]: Start difference. First operand has 195 places, 294 transitions, 3910 flow. Second operand 7 states and 113 transitions. [2024-06-27 20:55:13,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 315 transitions, 4619 flow [2024-06-27 20:55:13,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 315 transitions, 4536 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:55:13,392 INFO L231 Difference]: Finished difference. Result has 197 places, 295 transitions, 3924 flow [2024-06-27 20:55:13,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3833, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3924, PETRI_PLACES=197, PETRI_TRANSITIONS=295} [2024-06-27 20:55:13,392 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-27 20:55:13,392 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 295 transitions, 3924 flow [2024-06-27 20:55:13,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:13,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:13,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:13,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:55:13,393 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:13,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:13,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1912667077, now seen corresponding path program 1 times [2024-06-27 20:55:13,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:13,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788458501] [2024-06-27 20:55:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:13,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:13,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:13,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788458501] [2024-06-27 20:55:13,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788458501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:13,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:13,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:55:13,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012866920] [2024-06-27 20:55:13,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:13,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:55:13,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:13,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:55:13,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:55:14,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:55:14,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 295 transitions, 3924 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) [2024-06-27 20:55:14,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:14,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:55:14,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:14,760 INFO L124 PetriNetUnfolderBase]: 2903/4385 cut-off events. [2024-06-27 20:55:14,760 INFO L125 PetriNetUnfolderBase]: For 159352/159494 co-relation queries the response was YES. [2024-06-27 20:55:14,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33110 conditions, 4385 events. 2903/4385 cut-off events. For 159352/159494 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 22639 event pairs, 936 based on Foata normal form. 115/4460 useless extension candidates. Maximal degree in co-relation 33014. Up to 4114 conditions per place. [2024-06-27 20:55:14,803 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 246 selfloop transitions, 51 changer transitions 0/313 dead transitions. [2024-06-27 20:55:14,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 313 transitions, 4646 flow [2024-06-27 20:55:14,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:55:14,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:55:14,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-27 20:55:14,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-06-27 20:55:14,804 INFO L175 Difference]: Start difference. First operand has 197 places, 295 transitions, 3924 flow. Second operand 5 states and 93 transitions. [2024-06-27 20:55:14,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 313 transitions, 4646 flow [2024-06-27 20:55:15,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 313 transitions, 4562 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:55:15,013 INFO L231 Difference]: Finished difference. Result has 197 places, 298 transitions, 4049 flow [2024-06-27 20:55:15,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3840, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4049, PETRI_PLACES=197, PETRI_TRANSITIONS=298} [2024-06-27 20:55:15,013 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-27 20:55:15,014 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 298 transitions, 4049 flow [2024-06-27 20:55:15,014 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) [2024-06-27 20:55:15,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:15,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:15,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:55:15,014 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)] === [2024-06-27 20:55:15,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:15,014 INFO L85 PathProgramCache]: Analyzing trace with hash -661574543, now seen corresponding path program 1 times [2024-06-27 20:55:15,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:15,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370491105] [2024-06-27 20:55:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:15,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:15,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:15,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370491105] [2024-06-27 20:55:15,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370491105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:15,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:15,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:15,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986856431] [2024-06-27 20:55:15,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:15,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:15,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:15,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:15,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:15,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:15,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 298 transitions, 4049 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:55:15,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:15,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:15,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:16,783 INFO L124 PetriNetUnfolderBase]: 3744/5669 cut-off events. [2024-06-27 20:55:16,784 INFO L125 PetriNetUnfolderBase]: For 181965/181978 co-relation queries the response was YES. [2024-06-27 20:55:16,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41467 conditions, 5669 events. 3744/5669 cut-off events. For 181965/181978 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 30786 event pairs, 849 based on Foata normal form. 26/5695 useless extension candidates. Maximal degree in co-relation 41370. Up to 3966 conditions per place. [2024-06-27 20:55:16,839 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 252 selfloop transitions, 198 changer transitions 0/453 dead transitions. [2024-06-27 20:55:16,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 453 transitions, 6595 flow [2024-06-27 20:55:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 20:55:16,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-27 20:55:16,840 INFO L175 Difference]: Start difference. First operand has 197 places, 298 transitions, 4049 flow. Second operand 10 states and 183 transitions. [2024-06-27 20:55:16,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 453 transitions, 6595 flow [2024-06-27 20:55:17,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 453 transitions, 6508 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 20:55:17,115 INFO L231 Difference]: Finished difference. Result has 207 places, 373 transitions, 5422 flow [2024-06-27 20:55:17,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3970, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5422, PETRI_PLACES=207, PETRI_TRANSITIONS=373} [2024-06-27 20:55:17,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-27 20:55:17,116 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 373 transitions, 5422 flow [2024-06-27 20:55:17,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:55:17,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:17,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:17,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:55:17,119 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)] === [2024-06-27 20:55:17,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:17,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1111556749, now seen corresponding path program 2 times [2024-06-27 20:55:17,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:17,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155082423] [2024-06-27 20:55:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:17,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:17,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:17,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155082423] [2024-06-27 20:55:17,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155082423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:17,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:17,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:17,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738829781] [2024-06-27 20:55:17,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:17,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:17,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:17,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:17,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:17,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:17,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 373 transitions, 5422 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:55:17,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:17,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:17,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:19,046 INFO L124 PetriNetUnfolderBase]: 3964/6022 cut-off events. [2024-06-27 20:55:19,046 INFO L125 PetriNetUnfolderBase]: For 196953/196970 co-relation queries the response was YES. [2024-06-27 20:55:19,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45262 conditions, 6022 events. 3964/6022 cut-off events. For 196953/196970 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33297 event pairs, 935 based on Foata normal form. 30/6052 useless extension candidates. Maximal degree in co-relation 45161. Up to 4511 conditions per place. [2024-06-27 20:55:19,109 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 261 selfloop transitions, 206 changer transitions 0/470 dead transitions. [2024-06-27 20:55:19,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 470 transitions, 7346 flow [2024-06-27 20:55:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 20:55:19,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-27 20:55:19,111 INFO L175 Difference]: Start difference. First operand has 207 places, 373 transitions, 5422 flow. Second operand 10 states and 184 transitions. [2024-06-27 20:55:19,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 470 transitions, 7346 flow [2024-06-27 20:55:19,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 470 transitions, 7233 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 20:55:19,462 INFO L231 Difference]: Finished difference. Result has 216 places, 392 transitions, 6107 flow [2024-06-27 20:55:19,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6107, PETRI_PLACES=216, PETRI_TRANSITIONS=392} [2024-06-27 20:55:19,462 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-27 20:55:19,463 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 392 transitions, 6107 flow [2024-06-27 20:55:19,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:55:19,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:19,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:19,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:55:19,463 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)] === [2024-06-27 20:55:19,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:19,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1081173649, now seen corresponding path program 3 times [2024-06-27 20:55:19,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:19,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692752378] [2024-06-27 20:55:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:19,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:20,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:20,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692752378] [2024-06-27 20:55:20,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692752378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:20,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:20,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:20,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321277519] [2024-06-27 20:55:20,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:20,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:20,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:20,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:20,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:20,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 392 transitions, 6107 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:55:20,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:20,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:20,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:21,398 INFO L124 PetriNetUnfolderBase]: 4031/6135 cut-off events. [2024-06-27 20:55:21,399 INFO L125 PetriNetUnfolderBase]: For 213575/213592 co-relation queries the response was YES. [2024-06-27 20:55:21,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47000 conditions, 6135 events. 4031/6135 cut-off events. For 213575/213592 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 34193 event pairs, 974 based on Foata normal form. 38/6173 useless extension candidates. Maximal degree in co-relation 46895. Up to 4820 conditions per place. [2024-06-27 20:55:21,468 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 255 selfloop transitions, 208 changer transitions 0/466 dead transitions. [2024-06-27 20:55:21,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 466 transitions, 7609 flow [2024-06-27 20:55:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:21,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 20:55:21,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2024-06-27 20:55:21,469 INFO L175 Difference]: Start difference. First operand has 216 places, 392 transitions, 6107 flow. Second operand 10 states and 181 transitions. [2024-06-27 20:55:21,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 466 transitions, 7609 flow [2024-06-27 20:55:21,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 466 transitions, 7367 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 20:55:21,910 INFO L231 Difference]: Finished difference. Result has 223 places, 398 transitions, 6411 flow [2024-06-27 20:55:21,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5865, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6411, PETRI_PLACES=223, PETRI_TRANSITIONS=398} [2024-06-27 20:55:21,910 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 182 predicate places. [2024-06-27 20:55:21,911 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 398 transitions, 6411 flow [2024-06-27 20:55:21,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:55:21,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:21,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:21,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:55:21,911 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:21,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:21,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1572215825, now seen corresponding path program 4 times [2024-06-27 20:55:21,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:21,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339063051] [2024-06-27 20:55:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:21,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:22,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:22,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339063051] [2024-06-27 20:55:22,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339063051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:22,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:22,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:22,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671737700] [2024-06-27 20:55:22,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:22,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:22,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:22,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:22,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:22,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:22,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 398 transitions, 6411 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:55:22,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:22,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:22,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:24,260 INFO L124 PetriNetUnfolderBase]: 4692/7241 cut-off events. [2024-06-27 20:55:24,261 INFO L125 PetriNetUnfolderBase]: For 255935/255952 co-relation queries the response was YES. [2024-06-27 20:55:24,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55902 conditions, 7241 events. 4692/7241 cut-off events. For 255935/255952 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 42691 event pairs, 901 based on Foata normal form. 30/7271 useless extension candidates. Maximal degree in co-relation 55793. Up to 3769 conditions per place. [2024-06-27 20:55:24,330 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 244 selfloop transitions, 244 changer transitions 0/491 dead transitions. [2024-06-27 20:55:24,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 491 transitions, 8483 flow [2024-06-27 20:55:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:24,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:55:24,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-27 20:55:24,335 INFO L175 Difference]: Start difference. First operand has 223 places, 398 transitions, 6411 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:55:24,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 491 transitions, 8483 flow [2024-06-27 20:55:24,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 491 transitions, 8104 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:55:24,833 INFO L231 Difference]: Finished difference. Result has 230 places, 423 transitions, 7078 flow [2024-06-27 20:55:24,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6054, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7078, PETRI_PLACES=230, PETRI_TRANSITIONS=423} [2024-06-27 20:55:24,833 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-27 20:55:24,834 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 423 transitions, 7078 flow [2024-06-27 20:55:24,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:55:24,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:24,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:24,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:55:24,834 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)] === [2024-06-27 20:55:24,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:24,834 INFO L85 PathProgramCache]: Analyzing trace with hash 896791535, now seen corresponding path program 5 times [2024-06-27 20:55:24,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:24,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229556582] [2024-06-27 20:55:24,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:24,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:25,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:25,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229556582] [2024-06-27 20:55:25,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229556582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:25,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:25,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:55:25,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738940748] [2024-06-27 20:55:25,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:25,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:55:25,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:25,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:55:25,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:55:25,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:25,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 423 transitions, 7078 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:25,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:25,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:25,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:27,422 INFO L124 PetriNetUnfolderBase]: 4734/7326 cut-off events. [2024-06-27 20:55:27,422 INFO L125 PetriNetUnfolderBase]: For 276179/276196 co-relation queries the response was YES. [2024-06-27 20:55:27,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57218 conditions, 7326 events. 4734/7326 cut-off events. For 276179/276196 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 43644 event pairs, 1340 based on Foata normal form. 44/7370 useless extension candidates. Maximal degree in co-relation 57105. Up to 5712 conditions per place. [2024-06-27 20:55:27,507 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 283 selfloop transitions, 211 changer transitions 0/497 dead transitions. [2024-06-27 20:55:27,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 497 transitions, 8664 flow [2024-06-27 20:55:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:55:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:55:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-27 20:55:27,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-27 20:55:27,509 INFO L175 Difference]: Start difference. First operand has 230 places, 423 transitions, 7078 flow. Second operand 11 states and 194 transitions. [2024-06-27 20:55:27,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 497 transitions, 8664 flow [2024-06-27 20:55:28,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 497 transitions, 8381 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 20:55:28,056 INFO L231 Difference]: Finished difference. Result has 236 places, 425 transitions, 7309 flow [2024-06-27 20:55:28,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6799, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7309, PETRI_PLACES=236, PETRI_TRANSITIONS=425} [2024-06-27 20:55:28,057 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-27 20:55:28,057 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 425 transitions, 7309 flow [2024-06-27 20:55:28,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:28,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:28,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:28,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:55:28,058 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)] === [2024-06-27 20:55:28,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:28,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1666932139, now seen corresponding path program 6 times [2024-06-27 20:55:28,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:28,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058826108] [2024-06-27 20:55:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:28,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:28,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:28,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058826108] [2024-06-27 20:55:28,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058826108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:28,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:28,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:28,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275124953] [2024-06-27 20:55:28,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:28,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:28,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:28,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:28,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:28,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:28,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 425 transitions, 7309 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:55:28,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:28,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:28,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:30,757 INFO L124 PetriNetUnfolderBase]: 6040/9334 cut-off events. [2024-06-27 20:55:30,757 INFO L125 PetriNetUnfolderBase]: For 340376/340393 co-relation queries the response was YES. [2024-06-27 20:55:30,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74232 conditions, 9334 events. 6040/9334 cut-off events. For 340376/340393 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 57829 event pairs, 1487 based on Foata normal form. 38/9372 useless extension candidates. Maximal degree in co-relation 74118. Up to 6380 conditions per place. [2024-06-27 20:55:30,852 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 324 selfloop transitions, 304 changer transitions 0/631 dead transitions. [2024-06-27 20:55:30,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 631 transitions, 11718 flow [2024-06-27 20:55:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:30,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 20:55:30,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-27 20:55:30,854 INFO L175 Difference]: Start difference. First operand has 236 places, 425 transitions, 7309 flow. Second operand 10 states and 184 transitions. [2024-06-27 20:55:30,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 631 transitions, 11718 flow [2024-06-27 20:55:31,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 631 transitions, 11225 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 20:55:31,557 INFO L231 Difference]: Finished difference. Result has 242 places, 532 transitions, 9727 flow [2024-06-27 20:55:31,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6949, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9727, PETRI_PLACES=242, PETRI_TRANSITIONS=532} [2024-06-27 20:55:31,558 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-27 20:55:31,558 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 532 transitions, 9727 flow [2024-06-27 20:55:31,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:55:31,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:31,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:31,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:55:31,558 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)] === [2024-06-27 20:55:31,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:31,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1668806089, now seen corresponding path program 7 times [2024-06-27 20:55:31,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:31,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449285509] [2024-06-27 20:55:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:31,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:32,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:32,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449285509] [2024-06-27 20:55:32,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449285509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:32,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:32,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:32,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043313357] [2024-06-27 20:55:32,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:32,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:32,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:32,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:32,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:32,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:32,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 532 transitions, 9727 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:55:32,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:32,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:32,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:34,834 INFO L124 PetriNetUnfolderBase]: 6486/10065 cut-off events. [2024-06-27 20:55:34,834 INFO L125 PetriNetUnfolderBase]: For 413797/413814 co-relation queries the response was YES. [2024-06-27 20:55:34,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82134 conditions, 10065 events. 6486/10065 cut-off events. For 413797/413814 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 63672 event pairs, 1649 based on Foata normal form. 46/10111 useless extension candidates. Maximal degree in co-relation 82016. Up to 7553 conditions per place. [2024-06-27 20:55:34,932 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 340 selfloop transitions, 290 changer transitions 0/633 dead transitions. [2024-06-27 20:55:34,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 633 transitions, 12207 flow [2024-06-27 20:55:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:34,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:55:34,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-27 20:55:34,934 INFO L175 Difference]: Start difference. First operand has 242 places, 532 transitions, 9727 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:55:34,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 633 transitions, 12207 flow [2024-06-27 20:55:35,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 633 transitions, 12144 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 20:55:35,773 INFO L231 Difference]: Finished difference. Result has 252 places, 544 transitions, 10721 flow [2024-06-27 20:55:35,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9664, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10721, PETRI_PLACES=252, PETRI_TRANSITIONS=544} [2024-06-27 20:55:35,773 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-27 20:55:35,774 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 544 transitions, 10721 flow [2024-06-27 20:55:35,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:55:35,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:35,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:35,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:55:35,774 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)] === [2024-06-27 20:55:35,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:35,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1668809809, now seen corresponding path program 8 times [2024-06-27 20:55:35,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:35,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811507422] [2024-06-27 20:55:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:35,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:36,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:36,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811507422] [2024-06-27 20:55:36,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811507422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:36,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:36,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:36,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816687670] [2024-06-27 20:55:36,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:36,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:36,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:36,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:36,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:36,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:36,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 544 transitions, 10721 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:55:36,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:36,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:36,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:39,091 INFO L124 PetriNetUnfolderBase]: 6641/10335 cut-off events. [2024-06-27 20:55:39,091 INFO L125 PetriNetUnfolderBase]: For 454861/454878 co-relation queries the response was YES. [2024-06-27 20:55:39,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85826 conditions, 10335 events. 6641/10335 cut-off events. For 454861/454878 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 66126 event pairs, 1802 based on Foata normal form. 62/10397 useless extension candidates. Maximal degree in co-relation 85704. Up to 8392 conditions per place. [2024-06-27 20:55:39,218 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 340 selfloop transitions, 288 changer transitions 0/631 dead transitions. [2024-06-27 20:55:39,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 631 transitions, 12807 flow [2024-06-27 20:55:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:39,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 20:55:39,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-27 20:55:39,220 INFO L175 Difference]: Start difference. First operand has 252 places, 544 transitions, 10721 flow. Second operand 10 states and 182 transitions. [2024-06-27 20:55:39,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 631 transitions, 12807 flow [2024-06-27 20:55:40,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 631 transitions, 12472 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 20:55:40,474 INFO L231 Difference]: Finished difference. Result has 259 places, 557 transitions, 11310 flow [2024-06-27 20:55:40,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10386, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11310, PETRI_PLACES=259, PETRI_TRANSITIONS=557} [2024-06-27 20:55:40,475 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-27 20:55:40,475 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 557 transitions, 11310 flow [2024-06-27 20:55:40,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:55:40,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:40,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:40,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:55:40,476 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)] === [2024-06-27 20:55:40,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:40,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1755645769, now seen corresponding path program 9 times [2024-06-27 20:55:40,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:40,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967335020] [2024-06-27 20:55:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:40,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:41,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:41,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967335020] [2024-06-27 20:55:41,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967335020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:41,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:41,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:55:41,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106704964] [2024-06-27 20:55:41,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:41,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:55:41,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:41,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:55:41,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:55:41,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:41,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 557 transitions, 11310 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:41,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:41,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:41,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:44,411 INFO L124 PetriNetUnfolderBase]: 6700/10444 cut-off events. [2024-06-27 20:55:44,412 INFO L125 PetriNetUnfolderBase]: For 454200/454217 co-relation queries the response was YES. [2024-06-27 20:55:44,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87912 conditions, 10444 events. 6700/10444 cut-off events. For 454200/454217 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 67112 event pairs, 1814 based on Foata normal form. 54/10498 useless extension candidates. Maximal degree in co-relation 87786. Up to 8186 conditions per place. [2024-06-27 20:55:44,540 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 343 selfloop transitions, 292 changer transitions 0/638 dead transitions. [2024-06-27 20:55:44,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 638 transitions, 13306 flow [2024-06-27 20:55:44,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:55:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:55:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-27 20:55:44,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 20:55:44,542 INFO L175 Difference]: Start difference. First operand has 259 places, 557 transitions, 11310 flow. Second operand 11 states and 195 transitions. [2024-06-27 20:55:44,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 638 transitions, 13306 flow [2024-06-27 20:55:45,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 638 transitions, 12797 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:55:45,829 INFO L231 Difference]: Finished difference. Result has 264 places, 560 transitions, 11534 flow [2024-06-27 20:55:45,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10801, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11534, PETRI_PLACES=264, PETRI_TRANSITIONS=560} [2024-06-27 20:55:45,830 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-27 20:55:45,830 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 560 transitions, 11534 flow [2024-06-27 20:55:45,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:45,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:45,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:45,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:55:45,830 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)] === [2024-06-27 20:55:45,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:45,831 INFO L85 PathProgramCache]: Analyzing trace with hash -400520669, now seen corresponding path program 1 times [2024-06-27 20:55:45,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:45,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206353055] [2024-06-27 20:55:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:45,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:46,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:46,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206353055] [2024-06-27 20:55:46,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206353055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:46,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:46,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:55:46,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900156981] [2024-06-27 20:55:46,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:46,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:55:46,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:46,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:55:46,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:55:46,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:46,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 560 transitions, 11534 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:46,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:46,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:46,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:49,902 INFO L124 PetriNetUnfolderBase]: 6912/10789 cut-off events. [2024-06-27 20:55:49,902 INFO L125 PetriNetUnfolderBase]: For 483492/483497 co-relation queries the response was YES. [2024-06-27 20:55:49,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90605 conditions, 10789 events. 6912/10789 cut-off events. For 483492/483497 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 70171 event pairs, 2541 based on Foata normal form. 50/10839 useless extension candidates. Maximal degree in co-relation 90478. Up to 9957 conditions per place. [2024-06-27 20:55:50,047 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 498 selfloop transitions, 105 changer transitions 0/606 dead transitions. [2024-06-27 20:55:50,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 606 transitions, 13031 flow [2024-06-27 20:55:50,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 20:55:50,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:55:50,049 INFO L175 Difference]: Start difference. First operand has 264 places, 560 transitions, 11534 flow. Second operand 10 states and 175 transitions. [2024-06-27 20:55:50,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 606 transitions, 13031 flow [2024-06-27 20:55:51,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 606 transitions, 12537 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:55:51,181 INFO L231 Difference]: Finished difference. Result has 268 places, 564 transitions, 11389 flow [2024-06-27 20:55:51,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11040, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11389, PETRI_PLACES=268, PETRI_TRANSITIONS=564} [2024-06-27 20:55:51,181 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-27 20:55:51,182 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 564 transitions, 11389 flow [2024-06-27 20:55:51,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:51,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:51,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:51,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:55:51,182 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)] === [2024-06-27 20:55:51,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:51,183 INFO L85 PathProgramCache]: Analyzing trace with hash 468080573, now seen corresponding path program 2 times [2024-06-27 20:55:51,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:51,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753496793] [2024-06-27 20:55:51,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:51,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:52,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:52,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753496793] [2024-06-27 20:55:52,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753496793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:52,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:52,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:55:52,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682986483] [2024-06-27 20:55:52,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:52,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:55:52,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:52,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:55:52,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:55:52,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:52,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 564 transitions, 11389 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:52,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:52,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:52,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:55,257 INFO L124 PetriNetUnfolderBase]: 6910/10784 cut-off events. [2024-06-27 20:55:55,257 INFO L125 PetriNetUnfolderBase]: For 454519/454524 co-relation queries the response was YES. [2024-06-27 20:55:55,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89943 conditions, 10784 events. 6910/10784 cut-off events. For 454519/454524 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 70109 event pairs, 2601 based on Foata normal form. 10/10794 useless extension candidates. Maximal degree in co-relation 89815. Up to 10202 conditions per place. [2024-06-27 20:55:55,394 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 504 selfloop transitions, 108 changer transitions 0/615 dead transitions. [2024-06-27 20:55:55,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 615 transitions, 12920 flow [2024-06-27 20:55:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:55:55,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:55:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-27 20:55:55,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41458333333333336 [2024-06-27 20:55:55,396 INFO L175 Difference]: Start difference. First operand has 268 places, 564 transitions, 11389 flow. Second operand 12 states and 199 transitions. [2024-06-27 20:55:55,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 615 transitions, 12920 flow [2024-06-27 20:55:56,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 615 transitions, 12712 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:55:56,722 INFO L231 Difference]: Finished difference. Result has 274 places, 568 transitions, 11540 flow [2024-06-27 20:55:56,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11181, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11540, PETRI_PLACES=274, PETRI_TRANSITIONS=568} [2024-06-27 20:55:56,723 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-27 20:55:56,723 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 568 transitions, 11540 flow [2024-06-27 20:55:56,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:56,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:56,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:56,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:55:56,724 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:56,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:56,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1040282325, now seen corresponding path program 3 times [2024-06-27 20:55:56,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:56,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484705237] [2024-06-27 20:55:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:56,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:57,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:57,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484705237] [2024-06-27 20:55:57,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484705237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:57,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:57,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:55:57,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719167037] [2024-06-27 20:55:57,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:57,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:55:57,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:57,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:55:57,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:55:57,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:55:57,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 568 transitions, 11540 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:57,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:57,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:55:57,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:00,738 INFO L124 PetriNetUnfolderBase]: 6927/10809 cut-off events. [2024-06-27 20:56:00,739 INFO L125 PetriNetUnfolderBase]: For 462402/462407 co-relation queries the response was YES. [2024-06-27 20:56:00,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90100 conditions, 10809 events. 6927/10809 cut-off events. For 462402/462407 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 70284 event pairs, 2528 based on Foata normal form. 6/10815 useless extension candidates. Maximal degree in co-relation 89971. Up to 9890 conditions per place. [2024-06-27 20:56:00,863 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 501 selfloop transitions, 118 changer transitions 0/622 dead transitions. [2024-06-27 20:56:00,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 622 transitions, 13038 flow [2024-06-27 20:56:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:56:00,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:56:00,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-27 20:56:00,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42291666666666666 [2024-06-27 20:56:00,865 INFO L175 Difference]: Start difference. First operand has 274 places, 568 transitions, 11540 flow. Second operand 12 states and 203 transitions. [2024-06-27 20:56:00,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 622 transitions, 13038 flow [2024-06-27 20:56:02,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 622 transitions, 12736 flow, removed 46 selfloop flow, removed 10 redundant places. [2024-06-27 20:56:02,157 INFO L231 Difference]: Finished difference. Result has 276 places, 570 transitions, 11530 flow [2024-06-27 20:56:02,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11238, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11530, PETRI_PLACES=276, PETRI_TRANSITIONS=570} [2024-06-27 20:56:02,158 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-27 20:56:02,158 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 570 transitions, 11530 flow [2024-06-27 20:56:02,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:02,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:02,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:02,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:56:02,159 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:02,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:02,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1040067123, now seen corresponding path program 10 times [2024-06-27 20:56:02,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:02,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397776253] [2024-06-27 20:56:02,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:02,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:03,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:03,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397776253] [2024-06-27 20:56:03,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397776253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:03,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:03,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:56:03,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951832995] [2024-06-27 20:56:03,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:03,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:56:03,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:03,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:56:03,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:56:03,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:03,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 570 transitions, 11530 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:03,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:03,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:03,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:06,490 INFO L124 PetriNetUnfolderBase]: 7100/11094 cut-off events. [2024-06-27 20:56:06,490 INFO L125 PetriNetUnfolderBase]: For 519606/519611 co-relation queries the response was YES. [2024-06-27 20:56:06,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92579 conditions, 11094 events. 7100/11094 cut-off events. For 519606/519611 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 72746 event pairs, 2646 based on Foata normal form. 42/11136 useless extension candidates. Maximal degree in co-relation 92449. Up to 10265 conditions per place. [2024-06-27 20:56:06,622 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 515 selfloop transitions, 111 changer transitions 0/629 dead transitions. [2024-06-27 20:56:06,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 629 transitions, 13133 flow [2024-06-27 20:56:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:56:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:56:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 218 transitions. [2024-06-27 20:56:06,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41923076923076924 [2024-06-27 20:56:06,623 INFO L175 Difference]: Start difference. First operand has 276 places, 570 transitions, 11530 flow. Second operand 13 states and 218 transitions. [2024-06-27 20:56:06,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 629 transitions, 13133 flow [2024-06-27 20:56:07,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 629 transitions, 12861 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-27 20:56:07,949 INFO L231 Difference]: Finished difference. Result has 279 places, 573 transitions, 11620 flow [2024-06-27 20:56:07,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11258, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11620, PETRI_PLACES=279, PETRI_TRANSITIONS=573} [2024-06-27 20:56:07,950 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-27 20:56:07,950 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 573 transitions, 11620 flow [2024-06-27 20:56:07,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:07,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:07,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:07,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:56:07,951 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)] === [2024-06-27 20:56:07,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:07,951 INFO L85 PathProgramCache]: Analyzing trace with hash -805094617, now seen corresponding path program 11 times [2024-06-27 20:56:07,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:07,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267410299] [2024-06-27 20:56:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:07,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:08,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:08,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267410299] [2024-06-27 20:56:08,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267410299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:08,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:08,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:08,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440472746] [2024-06-27 20:56:08,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:08,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:08,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:08,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:08,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:08,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:08,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 573 transitions, 11620 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:56:08,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:08,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:08,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:11,865 INFO L124 PetriNetUnfolderBase]: 7306/11429 cut-off events. [2024-06-27 20:56:11,865 INFO L125 PetriNetUnfolderBase]: For 551117/551122 co-relation queries the response was YES. [2024-06-27 20:56:11,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95945 conditions, 11429 events. 7306/11429 cut-off events. For 551117/551122 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 75264 event pairs, 2607 based on Foata normal form. 34/11463 useless extension candidates. Maximal degree in co-relation 95814. Up to 9703 conditions per place. [2024-06-27 20:56:11,984 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 505 selfloop transitions, 117 changer transitions 0/625 dead transitions. [2024-06-27 20:56:11,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 625 transitions, 13419 flow [2024-06-27 20:56:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:56:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:56:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 20:56:11,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-27 20:56:11,985 INFO L175 Difference]: Start difference. First operand has 279 places, 573 transitions, 11620 flow. Second operand 10 states and 178 transitions. [2024-06-27 20:56:11,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 625 transitions, 13419 flow [2024-06-27 20:56:13,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 625 transitions, 13162 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-27 20:56:13,334 INFO L231 Difference]: Finished difference. Result has 280 places, 578 transitions, 11830 flow [2024-06-27 20:56:13,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11363, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11830, PETRI_PLACES=280, PETRI_TRANSITIONS=578} [2024-06-27 20:56:13,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-27 20:56:13,334 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 578 transitions, 11830 flow [2024-06-27 20:56:13,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:56:13,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:13,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:13,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:56:13,335 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)] === [2024-06-27 20:56:13,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:13,335 INFO L85 PathProgramCache]: Analyzing trace with hash -804946747, now seen corresponding path program 12 times [2024-06-27 20:56:13,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:13,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853577197] [2024-06-27 20:56:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:13,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:14,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:14,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853577197] [2024-06-27 20:56:14,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853577197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:14,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:14,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:56:14,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302513295] [2024-06-27 20:56:14,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:14,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:56:14,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:14,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:56:14,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:56:14,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:14,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 578 transitions, 11830 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:14,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:14,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:14,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:17,825 INFO L124 PetriNetUnfolderBase]: 7365/11551 cut-off events. [2024-06-27 20:56:17,825 INFO L125 PetriNetUnfolderBase]: For 566065/566070 co-relation queries the response was YES. [2024-06-27 20:56:17,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96504 conditions, 11551 events. 7365/11551 cut-off events. For 566065/566070 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 76745 event pairs, 2722 based on Foata normal form. 42/11593 useless extension candidates. Maximal degree in co-relation 96371. Up to 10461 conditions per place. [2024-06-27 20:56:17,968 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 517 selfloop transitions, 108 changer transitions 0/628 dead transitions. [2024-06-27 20:56:17,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 628 transitions, 13408 flow [2024-06-27 20:56:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:56:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:56:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-27 20:56:17,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:56:17,969 INFO L175 Difference]: Start difference. First operand has 280 places, 578 transitions, 11830 flow. Second operand 11 states and 190 transitions. [2024-06-27 20:56:17,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 628 transitions, 13408 flow [2024-06-27 20:56:19,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 628 transitions, 13209 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:19,407 INFO L231 Difference]: Finished difference. Result has 285 places, 581 transitions, 12006 flow [2024-06-27 20:56:19,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11639, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12006, PETRI_PLACES=285, PETRI_TRANSITIONS=581} [2024-06-27 20:56:19,408 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-27 20:56:19,408 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 581 transitions, 12006 flow [2024-06-27 20:56:19,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:19,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:19,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:19,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:56:19,409 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)] === [2024-06-27 20:56:19,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash 574126677, now seen corresponding path program 13 times [2024-06-27 20:56:19,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:19,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531417415] [2024-06-27 20:56:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:19,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:20,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:20,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531417415] [2024-06-27 20:56:20,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531417415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:20,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:20,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:20,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101394608] [2024-06-27 20:56:20,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:20,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:20,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:20,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:20,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:20,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:20,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 581 transitions, 12006 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:56:20,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:20,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:20,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:23,500 INFO L124 PetriNetUnfolderBase]: 7461/11677 cut-off events. [2024-06-27 20:56:23,501 INFO L125 PetriNetUnfolderBase]: For 562114/562131 co-relation queries the response was YES. [2024-06-27 20:56:23,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97760 conditions, 11677 events. 7461/11677 cut-off events. For 562114/562131 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 77107 event pairs, 1726 based on Foata normal form. 38/11715 useless extension candidates. Maximal degree in co-relation 97625. Up to 4742 conditions per place. [2024-06-27 20:56:23,634 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 384 changer transitions 0/633 dead transitions. [2024-06-27 20:56:23,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 633 transitions, 13797 flow [2024-06-27 20:56:23,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:56:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:56:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:56:23,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-27 20:56:23,635 INFO L175 Difference]: Start difference. First operand has 285 places, 581 transitions, 12006 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:56:23,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 633 transitions, 13797 flow [2024-06-27 20:56:25,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 633 transitions, 13524 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-27 20:56:25,031 INFO L231 Difference]: Finished difference. Result has 286 places, 584 transitions, 12635 flow [2024-06-27 20:56:25,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11733, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12635, PETRI_PLACES=286, PETRI_TRANSITIONS=584} [2024-06-27 20:56:25,032 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 245 predicate places. [2024-06-27 20:56:25,032 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 584 transitions, 12635 flow [2024-06-27 20:56:25,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:56:25,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:25,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:25,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:56:25,033 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)] === [2024-06-27 20:56:25,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:25,033 INFO L85 PathProgramCache]: Analyzing trace with hash 659121237, now seen corresponding path program 14 times [2024-06-27 20:56:25,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:25,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132179185] [2024-06-27 20:56:25,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:25,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:25,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:25,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132179185] [2024-06-27 20:56:25,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132179185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:25,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:25,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:25,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125286969] [2024-06-27 20:56:25,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:25,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:25,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:25,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:25,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:25,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:25,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 584 transitions, 12635 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-27 20:56:25,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:25,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:25,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand